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Java Exercises – Basic to Advanced Java Practice Programs with Solutions

Looking for Java exercises to test your Java skills, then explore our topic-wise Java practice exercises? Here you will get 25 plus practice problems that help to upscale your Java skills.

As we know Java is one of the most popular languages because of its robust and secure nature. But, programmers often find it difficult to find a platform for Java Practice Online. In this article, we have provided Java Practice Programs. That covers various Java Core Topics that can help users with Java Practice.

So, with ado further take a look at our free Java Exercises to practice and develop your Java programming skills. Our Java programming exercises Practice Questions from all the major topics like loops, object-oriented programming, exception handling, and many more.

Topic Wise Java Exercises List

Pattern Programs in Java
Array Programs in Java
String Programs in Java

Java Practice Problems for Searching Algorithms

Practice problems in java sorting algorithms, more java practice exercises.

Java Practice Programs

This Java exercise is designed to deepen your understanding and refine your Java coding skills, these programs offer hands-on experience in solving real-world problems, reinforcing key concepts, and mastering Java programming fundamentals. Whether you’re a beginner who looking to build a solid foundation or a professional developer aiming to sharpen your expertise, our Java practice programs provide an invaluable opportunity to sharpen your craft and excel in Java programming language .

By diving into these exercises, you’ll not only reinforce key concepts but also gain the practical experience needed to tackle real-world problems effectively. This hands-on practice is essential for mastering Java fundamentals and advancing your career as a proficient Java developer. To further enhance your skills, consider enrolling in our Java Course . This course offers comprehensive lessons and practical exercises, making it an excellent resource for both beginners and experienced developers.

1. Write Hello World Program in Java

The solution to the Problem is mentioned below:

2. Write a Program in Java to Add two Numbers.

Click here for the solution, 3. write a program to swap two numbers, 4. write a java program to convert integer numbers and binary numbers., 5. write a program to find factorial of a number in java., 6. write a java program to add two complex numbers., 7. write a program to calculate simple interest in java, 8. write a program to print the pascal’s triangle in java, 9. write a program to find sum of fibonacci series number, java exercise on pattern.

10. Write a Program to Print Pyramid Number Pattern in Java.

11. write a java program to print pattern., 12. write a java program to print pattern., 13. java program to print patterns., array exercises in java.

14. Write a Java Program to Compute the Sum of Array Elements.

15. write a java program to find the largest element in array, 16. write java program to find the tranpose of matrix, 17. java array program for array rotation, 18. java array program to remove duplicate elements from an array, 19. java array program to remove all occurrences of an element in an array, string exercises in java.

20. Java program to check whether a string is a Palindrome

21. java string program to check anagram, 22. java string program to reverse a string, 23. java string program to remove leading zeros.

24. Write a Java Program for Linear Search.

Time Complexity: O(N) Space Complexity: O(N)

25. Write a Binary Search Program in Java.

Time Complexity: O(logN) Space Complexity: O(N)

26. Java Program for Bubble Sort.

Time Complexity: O(N 2 ) Space Complexity: O(1)

27. Write a Program for Insertion Sort in Java.

28. java program for selection sort., 29. java program for merge sort..

Time Complexity: O(N logN) Space Complexity: O(N)

30. Java Program for QuickSort.

Time Complexity: O(N logN) Space Complexity: O(1)

After completing these Java exercises you are a step closer to becoming an advanced Java programmer. We hope these exercises have helped you understand Java better and you can solve beginner to advanced-level questions on Java programming.

Solving these Java programming exercise questions will not only help you master theory concepts but also grasp their practical applications, which is very useful in job interviews.

Java Array Exercise Java String Exercise Java Collection Exercise Click Here – To Practice Java Online please check our Practice Portal.

Java Exercise – FAQ

1. how to do java projects for beginners.

To do Java projects you need to know the fundamentals of Java programming. Then you need to select the desired Java project you want to work on. Plan and execute the code to finish the project. Some beginner-level Java projects include: Reversing a String Number Guessing Game Creating a Calculator Simple Banking Application Basic Android Application

2. Is Java easy for beginners?

As a programming language, Java is considered moderately easy to learn. It is unique from other languages due to its lengthy syntax. As a beginner, you can learn beginner to advanced Java in 6 to 18 months.

3. Why Java is used?

Java provides many advantages and uses, some of which are: Platform-independent Robust and secure Object-oriented Popular & in-demand Vast ecosystem

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▼Java Exercises
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Java Programming Exercises, Practice, Solution

Java exercises.

Java is the foundation for virtually every type of networked application and is the global standard for developing and delivering embedded and mobile applications, games, Web-based content, and enterprise software. With more than 9 million developers worldwide, Java enables you to efficiently develop, deploy and use exciting applications and services.

The best way we learn anything is by practice and exercise questions. Here you have the opportunity to practice the Java programming language concepts by solving the exercises starting from basic to more complex exercises. A sample solution is provided for each exercise. It is recommended to do these exercises by yourself first before checking the solution.

Hope, these exercises help you to improve your Java programming coding skills. Currently, following sections are available, we are working hard to add more exercises .... Happy Coding!

List of Java Exercises:

Basic Exercises Part-I [ 150 Exercises with Solution ]
Basic Exercises Part-II [ 99 Exercises with Solution ]
Methods [ 23 Exercises with Solution ]
Data Types Exercises [ 15 Exercises with Solution ]
Java Enum Types Exercises [ 5 Exercises with Solution ]
Conditional Statement Exercises [ 32 Exercises with Solution ]
Java recursive method Exercises [ 15 Exercises with Solution ]
Math [ 27 Exercises with Solution ]
Numbers [ 28 Exercises with Solution ]
Java Constructor Exercises [ 10 exercises with solution ]
Java Static Members Exercises [ 8 exercises with solution ]
Java Nested Classes Exercises [ 10 exercises with solution ]
Java Inheritance Exercises [ 9 exercises with solution ]
Java Abstract Classes Exercises [ 12 exercises with solution ]
Java Interface Exercises [ 11 exercises with solution ]
Java Encapsulation Exercises [ 14 exercises with solution ]
Java Polymorphism Exercises [ 12 exercises with solution ]
Object-Oriented Programming [ 30 Exercises with Solution ]
Exercises on handling and managing exceptions in Java [ 7 Exercises with Solution ]
Java Lambda expression Exercises [ 25 exercises with solution ]
Streams [ 8 Exercises with Solution ]
Java Thread Exercises [ 7 exercises with solution ]
Java Miltithreading Exercises [ 10 exercises with solution ]
Array [ 77 Exercises with Solution ]
Stack [ 29 Exercises with Solution ]
Collection [ 126 Exercises with Solution ]
String [ 107 Exercises with Solution ]
Input-Output-File-System [ 18 Exercises with Solution ]
Date Time [ 44 Exercises with Solution ]
Java Generic Methods [ 7 exercises with solution ]
Java Unit Test [ 10 Exercises with Solution ]
Search [ 7 Exercises with Solution ]
Sorting [ 19 Exercises with Solution ]
Regular Expression [ 30 Exercises with Solution ]
JavaFX [ 70 Exercises with Solution ]

Note: If you are not habituated with Java programming you can learn from the following :

Java Programming Language

More to Come !

List of Exercises with Solutions :

HTML CSS Exercises, Practice, Solution
JavaScript Exercises, Practice, Solution
jQuery Exercises, Practice, Solution
jQuery-UI Exercises, Practice, Solution
CoffeeScript Exercises, Practice, Solution
Twitter Bootstrap Exercises, Practice, Solution
C Programming Exercises, Practice, Solution
C# Sharp Programming Exercises, Practice, Solution
PHP Exercises, Practice, Solution
Python Exercises, Practice, Solution
R Programming Exercises, Practice, Solution
Java Exercises, Practice, Solution
SQL Exercises, Practice, Solution
MySQL Exercises, Practice, Solution
PostgreSQL Exercises, Practice, Solution
SQLite Exercises, Practice, Solution
MongoDB Exercises, Practice, Solution

[ Want to contribute to Java exercises? Send your code (attached with a .zip file) to us at w3resource[at]yahoo[dot]com. Please avoid copyrighted materials.]

Do not submit any solution of the above exercises at here, if you want to contribute go to the appropriate exercise page.

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C All Exercises & Assignments

Write a C program to check whether a number is even or odd

Description:

Write a C program to check whether a number is even or odd.

Note: Even number is divided by 2 and give the remainder 0 but odd number is not divisible by 2 for eg. 4 is divisible by 2 and 9 is not divisible by 2.

Conditions:

Create a variable with name of number.
Take value from user for number variable.

Enter the Number=9 Number is Odd.

Write a C program to swap value of two variables using the third variable.

You need to create a C program to swap values of two variables using the third variable.

You can use a temp variable as a blank variable to swap the value of x and y.

Take three variables for eg. x, y and temp.
Swap the value of x and y variable.

Write a C program to check whether a user is eligible to vote or not.

You need to create a C program to check whether a user is eligible to vote or not.

Minimum age required for voting is 18.
You can use decision making statement.

Enter your age=28 User is eligible to vote

Write a C program to check whether an alphabet is Vowel or Consonant

You need to create a C program to check whether an alphabet is Vowel or Consonant.

Create a character type variable with name of alphabet and take the value from the user.
You can use conditional statements.

Enter an alphabet: O O is a vowel.

Write a C program to find the maximum number between three numbers

You need to write a C program to find the maximum number between three numbers.

Create three variables in c with name of number1, number2 and number3
Find out the maximum number using the nested if-else statement

Enter three numbers: 10 20 30 Number3 is max with value of 30

Write a C program to check whether number is positive, negative or zero

You need to write a C program to check whether number is positive, negative or zero

Create variable with name of number and the value will taken by user or console
Create this c program code using else if ladder statement

Enter a number : 10 10 is positive

Write a C program to calculate Electricity bill.

You need to write a C program to calculate electricity bill using if-else statements.

For first 50 units – Rs. 3.50/unit
For next 100 units – Rs. 4.00/unit
For next 100 units – Rs. 5.20/unit
For units above 250 – Rs. 6.50/unit
You can use conditional statements.

Enter the units consumed=278.90 Electricity Bill=1282.84 Rupees

Write a C program to print 1 to 10 numbers using the while loop

You need to create a C program to print 1 to 10 numbers using the while loop

Create a variable for the loop iteration
Use increment operator in while loop

1 2 3 4 5 6 7 8 9 10

C Exercises Categories
C Top Exercises
C Decision Making

35 Python Programming Exercises and Solutions

To understand a programming language deeply, you need to practice what you’ve learned. If you’ve completed learning the syntax of Python programming language, it is the right time to do some practice programs.

1. Python program to check whether the given number is even or not.

2. python program to convert the temperature in degree centigrade to fahrenheit, 3. python program to find the area of a triangle whose sides are given, 4. python program to find out the average of a set of integers, 5. python program to find the product of a set of real numbers, 6. python program to find the circumference and area of a circle with a given radius, 7. python program to check whether the given integer is a multiple of 5, 8. python program to check whether the given integer is a multiple of both 5 and 7, 9. python program to find the average of 10 numbers using while loop, 10. python program to display the given integer in a reverse manner, 11. python program to find the geometric mean of n numbers, 12. python program to find the sum of the digits of an integer using a while loop, 13. python program to display all the multiples of 3 within the range 10 to 50, 14. python program to display all integers within the range 100-200 whose sum of digits is an even number, 15. python program to check whether the given integer is a prime number or not, 16. python program to generate the prime numbers from 1 to n, 17. python program to find the roots of a quadratic equation, 18. python program to print the numbers from a given number n till 0 using recursion, 19. python program to find the factorial of a number using recursion, 20. python program to display the sum of n numbers using a list, 21. python program to implement linear search, 22. python program to implement binary search, 23. python program to find the odd numbers in an array, 24. python program to find the largest number in a list without using built-in functions, 25. python program to insert a number to any position in a list, 26. python program to delete an element from a list by index, 27. python program to check whether a string is palindrome or not, 28. python program to implement matrix addition, 29. python program to implement matrix multiplication, 30. python program to check leap year, 31. python program to find the nth term in a fibonacci series using recursion, 32. python program to print fibonacci series using iteration, 33. python program to print all the items in a dictionary, 34. python program to implement a calculator to do basic operations, 35. python program to draw a circle of squares using turtle.

For practicing more such exercises, I suggest you go to hackerrank.com and sign up. You’ll be able to practice Python there very effectively.

I hope these exercises were helpful to you. If you have any doubts, feel free to let me know in the comments.

Happy coding.

12 thoughts on “ 35 Python Programming Exercises and Solutions ”

I don’t mean to nitpick and I don’t want this published but you might want to check code for #16. 4 is not a prime number.

You can only check if integer is a multiple of 35. It always works the same – just multiply all the numbers you need to check for multiplicity.

v_str = str ( input(‘ Enter a valid string or number :- ‘) ) v_rev_str=” for v_d in v_str: v_rev_str = v_d + v_rev_str

Python Object-Oriented Programming (OOP) Exercise: Classes and Objects Exercises

Updated on: December 8, 2021 | 52 Comments

This Object-Oriented Programming (OOP) exercise aims to help you to learn and practice OOP concepts. All questions are tested on Python 3.

Python Object-oriented programming (OOP) is based on the concept of “objects,” which can contain data and code: data in the form of instance variables (often known as attributes or properties), and code, in the form method. I.e., Using OOP, we encapsulate related properties and behaviors into individual objects.

What is included in this Python OOP exercise?

This OOP classes and objects exercise includes 8 different programs, questions, and challenges. All solutions are tested on Python 3.

This OOP exercise covers questions on the following topics :

Class and Object creation
Instance variables and Methods, and Class level attributes
Model systems with class inheritance i.e., inherit From Other Classes
Parent Classes and Child Classes
Extend the functionality of Parent Classes using Child class
Object checking

When you complete each question, you get more familiar with the Python OOP. Let us know if you have any alternative solutions . It will help other developers.

Use Online Code Editor to solve exercise questions.

Guide on Python OOP
Inheritance in Python

Oop exercise 1: create a class with instance attributes, oop exercise 2: create a vehicle class without any variables and methods, oop exercise 3: create a child class bus that will inherit all of the variables and methods of the vehicle class, oop exercise 4: class inheritance, oop exercise 5: define a property that must have the same value for every class instance (object), oop exercise 6: class inheritance, oop exercise 7: check type of an object, oop exercise 8: determine if school_bus is also an instance of the vehicle class.

Write a Python program to create a Vehicle class with max_speed and mileage instance attributes.

Classes and Objects in Python
Instance variables in Python

Create a Bus object that will inherit all of the variables and methods of the parent Vehicle class and display it.

Expected Output:

Refer : Inheritance in Python

Create a Bus class that inherits from the Vehicle class. Give the capacity argument of Bus.seating_capacity() a default value of 50.

Use the following code for your parent Vehicle class.

Expected Output :

Polymorphism in Python
First, use method overriding.
Next, use default method argument in the seating_capacity() method definition of a bus class.

Define a class attribute” color ” with a default value white . I.e., Every Vehicle should be white.

Use the following code for this exercise.

Refer : Class Variable in Python

Define a color as a class variable in a Vehicle class

Variables created in .__init__() are called instance variables . An instance variable’s value is specific to a particular instance of the class. For example, in the solution, All Vehicle objects have a name and a max_speed, but the name and max_speed variables’ values will vary depending on the Vehicle instance.

On the other hand, the class variable is shared between all class instance s. You can define a class attribute by assigning a value to a variable name outside of .__init__() .

Create a Bus child class that inherits from the Vehicle class. The default fare charge of any vehicle is seating capacity * 100 . If Vehicle is Bus instance, we need to add an extra 10% on full fare as a maintenance charge. So total fare for bus instance will become the final amount = total fare + 10% of the total fare.

Note: The bus seating capacity is 50 . so the final fare amount should be 5500. You need to override the fare() method of a Vehicle class in Bus class.

Use the following code for your parent Vehicle class. We need to access the parent class from inside a method of a child class.

Write a program to determine which class a given Bus object belongs to.

Use Python’s built-in function type() .

Use isinstance() function

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About Vishal

I’m Vishal Hule , the Founder of PYnative.com. As a Python developer, I enjoy assisting students, developers, and learners. Follow me on Twitter .

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C programming examples, exercises and solutions for beginners

Fundamentals.

Hello world program in C
Basic input/output
Basic IO on all data types
Perform arithmetic operations
Find area and perimeter of rectangle
Find diameter and area of circle
Find area of triangle
Find angles of triangle
Temperature conversion
Length conversion
Days conversion
Find power of a number
Find square root
Calculate simple interest
Calculate compound interest
Find range of data types

Bitwise Operator

Check Least Significant Bit (LSB)
Check Most Significant Bit (MSB)
Get nth bit of a number
Set nth bit of a number
Clear nth bit of a number
Toggle nth bit of a number
Highest set bit of a number
Lowest set bit of a number
Count trailing zeros of binary number
Count leading zeros of binary number
Flip bits of a number
Rotate bits of a number
Decimal to binary
Swap two numbers
Check even or odd
View all Bitwise operator examples →

Ternary Operator

Maximum of two numbers
Maximum of three numbers
Check leap year
Check alphabet
View all ternary operator examples →
Find maximum of two numbers
Find maximum of three numbers
Check negative, positive or zero
Check divisibility
Check alphabet character
Check vowel or consonant
Check alphabet, digit or special character
Check uppercase or lowercase
Print day of week
Find number of days in month
Find roots of quadratic equation
Calculate profile/loss
View all if else examples →

Switch case

Find total days in month
Check positive, negative or zero
Simple calculator application
View all switch case examples →

Loop/Iteration

Print natural numbers from 1 to n
Print alphabets from a to z
Print even numbers from 1 to n
Print sum of all numbers from 1 to n
Print sum of all odd numbers from 1 to n
Print multiplication table of n
Find number of digits in a number
Find first and last digit
Find sum of first and last digit
Swap first and last digit
Find sum of digits of a number
Find reverse of a number
Find frequency of digits in a number
Find power of a number using loop
Find factorial of a number
Find HCF of two numbers
Find LCM of two numbers
View all loop examples →

Number system and conversion

Find one's complement
Find two's complement
Binary to octal conversion
Binary to decimal conversion
Binary to hexadecimal conversion
Octal to binary conversion
Octal to decimal conversion
Octal to hexadecimal conversion
Decimal to binary conversion
Decimal to octal conversion
Decimal to hexadecimal conversion
Hexadecimal to binary conversion
Hexadecimal to octal conversion
Hexadecimal to decimal conversion
View all conversion examples →

Number patterns

Square number pattern
Right triangle number pattern
Inverted right triangle
Triangle with zero filled
Half diamond pattern
Half diamond star bordered pattern
X number pattern
View all number pattern examples →
Find cube using functions
Diameter & area of circle using functions
Maximum and minimum using functions
Check even odd using functions
Check Prime number using functions
Find all prime numbers using functions
Find all strong numbers using functions
Find all armstrong numbers using functions
Find all perfect numbers using functions
View all function examples →
Find power using recursion
Print natural numbers using recursion
Print even numbers using recursion
Sum of natural numbers using recursion
Sum of even/odd numbers using recursion
Find reverse using recursion
Check palindrome using recursion
Find sum of digits using recursion
Find factorial using recursion
Generate nth Fibonacci term using recursion
Find HCF (GCD) using recursion
Find LCM using recursion
Sum of array elements using recursion
View all recursion examples →
Input and display array elements
Sum of all array elements
Find second largest element in array
Copy one array to another
Insert new element in array
Delete an element from array
Find frequency of array elements
Merge two array to third array
Delete duplicate elements from array
Reverse an array
Search an element in array
Sort an array
Left rotate an array
Right rotate an array
View all array examples →

Matrix (2D array)

Add two matrices
Scalar matrix multiplication
Multiply two matrices
Check if two matrices are equal
Sum of diagonal elements of matrix
Interchange diagonal of matrix
Find upper triangular matrix
Find sum of lower triangular matrix
Find transpose of triangular matrix
Find determinant of a matrix
Check identity matrix
Check sparse matrix
Check symmetric matrix
View all matrix examples →
Find length of string
Copy string to another string
Concatenate two strings
Compare two strings
Convert lowercase to uppercase
Find reverse of a string
Check palindrome
Reverse order of words
Search a character in string
Search a word in string
Find highest occurring character
Remove all duplicate characters
Replace a character in string
Trim whitespace from string
View all string examples →
Create, initialize and use pointer
Add two numbers using pointers
Swap two numbers using pointers
Access array using pointers
Copy array using pointers
Reverse array using pointers
Access 2D array using pointers
Multiply matrices using pointers
Copy strings using pointers
Concatenate strings using pointers
Compare strings using pointers
Reverse strings using pointers
Sort array strings using pointers
Return multiple values from function using pointers
View all pointers examples →
Create file and write contents
Read file contents and display
Append contents to file
Compare two files
Copy one file to another
Merge two files
Remove a word from file
Remove a line from file
Replace a word in file
Replace a line in file
Print source code
Convert uppercase to lowercase in file
Find properties of file
Check if file or directory exists
Rename a file or directory
List of files recursively
View all files handling examples →

Macros/Pre-processor directives

Create custom header file
Define, undefine and redefine a macro
Find sum using macro
Find square and cube using macro
Check even/odd using macro
Find maximum or minimum using macro
Check lowercase/uppercase using macro
Swap two numbers using macro
Multiline macros

Browse Course Material

Course info, instructors.

Dr. Ana Bell
Prof. Eric Grimson
Prof. John Guttag

Departments

Electrical Engineering and Computer Science

As Taught In

Algorithms and Data Structures
Programming Languages

Learning Resource Types

Introduction to computer science and programming in python, assignments.

Note: The links provided to the software may no longer work. You can download the current and previous versions of Anaconda and Python from their respective sites. This course is based on Python 3.5. See the Anaconda for Python 3.5 FAQ .

Please review the 6.0001 Style Guide (PDF) before attempting the problem sets. If you need additional help, please consult the 6.0001 list of Programming Resources (PDF) . Solutions are not available.

Problem Set 0 (ZIP - 2.0MB) (This file contains: 1 .py file and 2 .pdf files.)

Problem Set 1 (PDF)

Problem Set 2 (ZIP) (This file contains: 1 .txt file, 1 .py file and 1 .pdf file.)

Problem Set 3 (ZIP) (This file contains: 1 .pdf file, 2 .py files and 1 .txt file.)

Problem Set 4 (ZIP) (This file contains: 1 .pdf file, 3 .py files and 2 .txt files.)

Problem Set 5 (ZIP) (This file contains: 5 .py files, 1 .pdf file and 1 .txt file.)

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22 Coding Interview Questions Every Developer Should Know

Coding tests have been the backbone of technical hiring for decades. If you’re a web developer, programmer, or engineer on the job market, your ability to demonstrate your skills in a coding interview is critical to landing your next role.

The key to succeeding in these interviews is preparing well for the styles of problems you might encounter. In this post, we’ll break down four categories of coding interview questions you could face — and 22 sample questions to help you start preparing.

Web Developer Interview Questions: An Overview

Coding interview questions — sometimes called coding challenges — ask developers to write code to find an answer to a problem. Depending on the role and company, coding questions can be language-specific or allow developers to respond in their coding language of choice. Often, these questions are asked directly via an in-browser IDE that provides developers with the tools they need to provide a solution in full.

While coding questions come in a variety of formats, the strategies for answering them are similar. As you write your code, you’ll be expected to explain your solution to the hiring team. They’ll typically give you real-time feedback on the efficacy, complexity, and accuracy of your solution.

It’s important to keep in mind that a “correct” answer isn’t always enough to pass a coding interview. That’s because the approach also allows hiring teams to assess your technical communication, your code quality, and the efficiency of the solution.

Examples of coding tests include:

Take-home tests sent during screening
Multiple-choice tests
Project-based tests
Pair-programming in a virtual IDE

This part of the process is highly variable, with hiring managers able to choose from a number of formats on how to evaluate technical skills. Programmers will need to carefully prepare to ensure they can adapt to a variety of challenges.

Types of Coding Interview Questions

There are a number of different types of coding questions employers can use to evaluate a programmer’s coding skills. The difficulty and composition of these tests will vary based on the experience-level of the role.

Generally, the more experienced a developer is, the more ambiguous and challenging the questions they will be asked. For example, candidates for entry-level roles might complete coding questions that test execution of predefined problems. In contrast, questions for senior roles can become more open-ended, writing code for problems without predefined solutions.

The following is a list of the types of coding questions a programmer might encounter during a technical interview.

Algorithm questions are foundational to the technical interview. They test a candidate’s coding skills and ability to solve problems with algorithms in a programming language of their choice.

Sample Question : The Efficient Janitor

The janitor of a high school is extremely efficient. By the end of each day, all of the school’s waste is in plastic bags weighing between 1.01 pounds and 3.00 pounds. All plastic bags are then taken to the trash bins outside. One trip is described as selecting a number of bags which together do not weigh more than 3.00 pounds, dumping them in the outside trash can and returning to the school. Given the number of plastic bags, and the weights of each bag, determine the minimum number of trips the janitor has to make.

This problem tests the candidate’s ability to use two pointers to search for pairs in an assorted array.

Data Structures

Data structures are a fundamental concept of computer science and any programming language. Essential for algorithmic design, programmers use data structures for the efficient organization and modification of data.

Sample Question: Binary Search Tree

You are given a pointer to the root of a binary search tree and values to be inserted into the tree. Insert the values into their appropriate position in the binary search tree and return the root of the updated binary tree. You just have to complete the function.

A binary search tree is a rooted binary tree data structure with internal nodes that each store a key less than all the keys in its right subtree and greater than all the keys in the node’s left subtree.

This question tests a programmer’s ability to work with data structures to solve problems.

Language-Specific Problems

Most coding questions aren’t specific to a particular programming language, allowing a programmer to write code in their language of choice. However, some coding interviews will have questions that test a specific language required by the role.

Sample Question: Enhanced Flexible Grid

Languages: JavaScript, CSS

Create a flexible grid with 1 row and 4 columns. The width of each column is 25% of the window size. This percentage width must be maintained even if the page is resized. Each cell of the grid can contain another 1×4 flexible grid. The border of the grid must be 1px black.

Perform the following operations based on the value of window size:

If the window size is less than 720px, then the 1×4 flexible grid becomes a 2×2 grid. That is, the 3rd and 4th columns slide down onto the 2nd row.
If the window size is less than 360px, then the 1×4 flexible grid becomes 4×1 grid. Each column slides under the one before it. The 2nd column slides under the 1st, the 3rd slides under the 2nd, and the 4th slides under the 3rd.

This question tests a developer’s ability to write code in JS and CSS and build UI elements. Essential to responsive design, a flexible grid tests a candidate’s ability to perform a task required by a role in front-end development.

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A hacker practices on HackerRank until getting to a rating of O(1) read as (Oh-one) . Call the method coder.practice until coder.oh_one? becomes true. Use the until control structure. until is the logical equivalent of while not. This challenge has a one-line answer. (Language: Ruby)
Write a function int max_of_four(int a, int b, int c, int d) which reads four arguments and returns the greatest of them. There is not a built-in max function in C. Code that will be reused is often put in a separate function, e.g. int max(x, y) that returns the greater of the two values. Input will contain four integers – a, b, c, d – one on each line. Note: I/O will be automatically handled. (Language: C)
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The closing tags follow the format: </tag-name> .
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Given the source code in HRML format consisting of N lines, answer Q queries. For each query, print the value of the attribute specified. Print “Not Found!” if the attribute does not exist.
If n is odd, print Weird
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Notes, programming assignments and quizzes from all courses within the Coursera Deep Learning specialization offered by deeplearning.ai: (i) Neural Networks and Deep Learning; (ii) Improving Deep Neural Networks: Hyperparameter tuning, Regularization and Optimization; (iii) Structuring Machine Learning Projects; (iv) Convolutional Neural Network…

amanchadha/coursera-deep-learning-specialization

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Deep learning specialization on coursera (offered by deeplearning.ai).

Programming assignments and quizzes from all courses in the Coursera Deep Learning specialization offered by deeplearning.ai .

Instructor: Andrew Ng

For detailed interview-ready notes on all courses in the Coursera Deep Learning specialization, refer www.aman.ai .

Run setup.sh to (i) download a pre-trained VGG-19 dataset and (ii) extract the zip'd pre-trained models and datasets that are needed for all the assignments.

This repo contains my work for this specialization. The code base, quiz questions and diagrams are taken from the Deep Learning Specialization on Coursera , unless specified otherwise.

2021 Version

This specialization was updated in April 2021 to include developments in deep learning and programming frameworks, with the biggest change being shifting from TensorFlow 1 to TensorFlow 2. This repo has been updated accordingly as well.

Programming Assignments

Course 1: neural networks and deep learning.

Week 2 - PA 1 - Python Basics with Numpy
Week 2 - PA 2 - Logistic Regression with a Neural Network mindset
Week 3 - PA 3 - Planar data classification with one hidden layer
Week 4 - PA 4 - Building your Deep Neural Network: Step by Step
Week 4 - PA 5 - Deep Neural Network for Image Classification: Application

Course 2: Improving Deep Neural Networks: Hyperparameter tuning, Regularization and Optimization

Week 1 - PA 1 - Initialization
Week 1 - PA 2 - Regularization
Week 1 - PA 3 - Gradient Checking
Week 2 - PA 4 - Optimization Methods
Week 3 - PA 5 - TensorFlow Tutorial

Course 3: Structuring Machine Learning Projects

There are no programming assignments for this course. But this course comes with very interesting case study quizzes (below).

Course 4: Convolutional Neural Networks

Week 1 - PA 1 - Convolutional Model: step by step
Week 1 - PA 2 - Convolutional Neural Networks: Application
Week 2 - PA 1 - Keras - Tutorial - Happy House
Week 2 - PA 2 - Residual Networks
Week 2 - PA 2 - Transfer Learning with MobileNet
Week 3 - PA 1 - Car detection with YOLO for Autonomous Driving
Week 3 - PA 2 - Image Segmentation Unet
Week 4 - PA 1 - Art Generation with Neural Style Transfer
Week 4 - PA 2 - Face Recognition

Course 5: Sequence Models

Week 1 - PA 1 - Building a Recurrent Neural Network - Step by Step
Week 1 - PA 2 - Dinosaur Land -- Character-level Language Modeling
Week 1 - PA 3 - Jazz improvisation with LSTM
Week 2 - PA 1 - Word Vector Representation and Debiasing
Week 2 - PA 2 - Emojify!
Week 3 - PA 1 - Neural Machine Translation with Attention
Week 3 - PA 2 - Trigger Word Detection
Week 4 - PA 1 - Transformer Network
Week 3 - PA 2 - Transformer Network Application: Named-Entity Recognition
Week 3 - PA 2 - Transformer Network Application: Question Answering

Quiz Solutions

Week 1 Quiz - Introduction to deep learning: Text | PDF
Week 2 Quiz - Neural Network Basics: Text | PDF
Week 3 Quiz - Shallow Neural Networks: Text | PDF
Week 4 Quiz - Key concepts on Deep Neural Networks: Text | PDF
Week 1 Quiz - Practical aspects of deep learning: Text | PDF
Week 2 Quiz - Optimization algorithms: Text | PDF
Week 3 Quiz - Hyperparameter tuning, Batch Normalization, Programming Frameworks: Text | PDF
Week 1 Quiz - Bird recognition in the city of Peacetopia (case study): Text | PDF
Week 2 Quiz - Autonomous driving (case study): Text | PDF
Week 1 Quiz - The basics of ConvNets: Text | PDF
Week 2 Quiz - Deep convolutional models: Text | PDF
Week 3 Quiz - Detection algorithms: Text | PDF
Week 4 Quiz - Special applications: Face recognition & Neural style transfer: Text | PDF
Week 1 Quiz - Recurrent Neural Networks: Text | PDF
Week 2 Quiz - Natural Language Processing & Word Embeddings: PDF
Week 3 Quiz - Sequence models & Attention mechanism: Text | PDF

I recognize the time people spend on building intuition, understanding new concepts and debugging assignments. The solutions uploaded here are only for reference . They are meant to unblock you if you get stuck somewhere. Please do not copy any part of the code as-is (the programming assignments are fairly easy if you read the instructions carefully). Similarly, try out the quizzes yourself before you refer to the quiz solutions. This course is the most straight-forward deep learning course I have ever taken, with fabulous course content and structure. It's a treasure by the deeplearning.ai team.

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amanchadha/coursera-deep-learning-specialization
Notes, programming assignments and quizzes from all courses within the Coursera Deep Learning specialization offered by deeplearning.ai: (i) Neural Networks and Deep Learning; (ii) Improving Deep Neural Networks: Hyperparameter tuning, Regularization and Optimization; (iii) Structuring Machine Learning Projects; (iv) Convolutional Neural Networks; (v) Sequence Models - amanchadha/coursera-deep ...
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