Coding Questions asked in the interview for freshers and Experienced Programmer

INTRODUCTION

   Programming is the process of designing, writing, testing, and maintaining software code. It involves using a programming language to create instructions that a computer can follow to perform specific tasks. Programming is an essential part of modern life and has led to the development of numerous software applications and tools that have revolutionized the way we live and work.

Programming requires a combination of analytical, logical, and creative thinking skills. A programmer must be able to understand complex problems and break them down into smaller, more manageable tasks. They must also have a good understanding of computer architecture and the ability to write efficient and optimized code. In addition, they must be able to work well in a team environment and communicate effectively with other programmers, designers, and stakeholders.

There are many different programming languages and tools available, each with its own strengths and weaknesses. Some of the most popular programming languages include Java, Python, C++, and JavaScript. These languages are used to create a wide range of software applications, including web applications, mobile apps, video games, and more.

Whether you're a student looking to learn how to code or a professional programmer looking to advance your skills, programming is a rewarding and challenging field that offers endless opportunities for growth and innovation.

 

Here are 30 coding questions that are commonly asked in interviews for freshers:

1. Write a program to find the factorial of a number.
2. Write a program to reverse a string.
3. Write a program to find the largest and smallest number in an array.
4. Write a program to check if a number is prime or not.
5. Write a program to swap two numbers without using a temporary variable.
6. Write a program to check if a given string is a palindrome.
7. Write a program to find the sum of all the digits of a number.
8. Write a program to find the second largest number in an array.
9. Write a program to find the sum of all even numbers in an array.
10. Write a program to find the sum of all odd numbers in an array.
11. Write a program to check if a given number is Armstrong or not.
12. Write a program to find the Fibonacci series.
13. Write a program to check if a string is a valid palindrome.
14. Write a program to remove duplicates from an array.
15. Write a program to find the GCD of two numbers.
16. Write a program to find the LCM of two numbers.
17. Write a program to check if a given string is a valid email address.
18. Write a program to implement a stack using an array.
19. Write a program to implement a queue using an array.
20. Write a program to implement a linked list.
21. Write a program to sort an array in ascending order.
22. Write a program to sort an array in descending order.
23. Write a program to find the maximum and minimum values in a binary tree.
24. Write a program to find the height of a binary tree.
25. Write a program to find the sum of all nodes in a binary tree.
26. Write a program to find the number of leaf nodes in a binary tree.
27. Write a program to find the number of nodes in a binary tree.
28. Write a program to check if a given binary tree is a binary search tree.
29. Write a program to implement a binary search algorithm.
30. Write a program to implement a linear search algorithm.

These are just a few examples, and there may be many other coding questions that you may encounter in an interview. However, preparing for these questions will definitely give you a good foundation for your interview.

 

 

Here are 30 programming questions that may be asked in an interview for an experienced programmer:

1. Explain the differences between an abstract class and an interface in Java.
2. What is the difference between a stack and a queue?
3. Write a program to implement a binary search tree.
4. Explain the concept of polymorphism in object-oriented programming.
5. What is the difference between dynamic binding and static binding?
6. Write a program to implement a merge sort algorithm.
7. What is the difference between a primary key and a foreign key in a database?
8. Explain the concept of encapsulation in object-oriented programming.
9. Write a program to implement a quicksort algorithm.
10. What is the difference between a class and an object in Java?
11. Explain the differences between a HashMap and a hash table in Java.
12. Write a program to implement a breadth-first search algorithm.
13. Explain the concept of inheritance in object-oriented programming.
14. What is the difference between a constructor and a method in Java?
15. Write a program to implement a depth-first search algorithm.
16. Explain the differences between a binary search and a linear search algorithm.
17. What is the difference between a linked list and an array in Java?
18. Write a program to implement a heap sort algorithm.
19. Explain the concept of abstraction in object-oriented programming.
20. What is the difference between a static method and an instance method in Java?
21. Write a program to implement a Dijkstra's algorithm.
22. Explain the differences between a left join and a right join in SQL.
23. What is the difference between a stack and a heap in memory management?
24. Write a program to implement a bubble sort algorithm.
25. Explain the differences between a process and a thread in operating systems.
26. What is the difference between a synchronized and an unsynchronized block in Java?
27. Write a program to implement a selection sort algorithm.
28. Explain the differences between a semaphore and a mutex in concurrent programming.
29. What is the difference between a deadlock and a livelock in concurrent programming?
30. Write a program to implement a radix sort algorithm.

These questions cover a range of topics and are designed to test an experienced programmer's knowledge of data structures, algorithms, programming concepts, and database management. Preparing for these questions will give you a good foundation for your interview.

 

Here are some additional programming questions that are asked rarely but may come up in an interview:

1. What is a recursive function and when would you use one?
2. Explain the concept of operator overloading in C++.
3. What is a virtual function in C++?
4. What is the difference between a pointer and a reference in C++?
5. Explain the differences between a singleton and a factory design pattern.
6. What is the difference between a GET request and a POST request in HTTP?
7. Explain the concept of lambda expressions in Python.
8. What is the difference between a decorator and a wrapper in Python?
9. What is a coroutine in Python?
10. Explain the differences between a shallow copy and a deep copy in Python.
11. What is the difference between a closure and a lambda function in Python?
12. Explain the differences between a private and a protected access modifier in Java.
13. What is the difference between a synchronized and a concurrent collection in Java?
14. Explain the concept of garbage collection in Java.
15. What is the difference between a static class and a non-static class in C#?
16. Explain the differences between a LINQ query and a SQL query in C#.
17. What is the difference between a stack and a heap in memory management?
18. Explain the concept of a foreign key constraint in a database.
19. What is the difference between a hash table and a binary search tree?
20. Explain the concept of a closure in JavaScript.

These questions are more specific and may require more in-depth knowledge of programming concepts. They are not as commonly asked in interviews, but it's good to be prepared for any question that may come up.

 

Conclusion :  

In conclusion, programming is a crucial aspect of modern technology and has revolutionized the way we live and work. The ability to create software and code that can automate processes, solve problems, and create new opportunities has led to incredible advancements in fields such as healthcare, finance, and transportation.

Learning how to code requires a combination of hard work, dedication, and persistence. However, the rewards of programming can be immense. As a programmer, you have the ability to create applications and tools that can have a positive impact on people's lives and make the world a better place.

Whether you are just starting to learn how to code or you are an experienced programmer looking to take your skills to the next level, programming is a field that offers endless possibilities for growth and innovation. With the right mindset and a passion for problem-solving, anyone can become a successful programmer and make a meaningful impact on the world around them.