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## Top 50 C Coding Interview Questions and Answers (2023)

1. find the largest number among the three numbers..

• 2. Write a Program to check whether a number is prime or not
• 3. Write a C program to calculate Compound Interest

## 4. Write a Program in C to Swap the values of two variables without using any extra variable.

• 5. Write a Program to Replace all 0's with 1's in a Number

## 6. Write a Program to convert the binary number into a decimal number.

• 7. Â Write a Program to check if the year is a leap year or not

## 8. Write a program to Factorial of a Number.

• 9. Write a Program to Check if a number is an Armstrong number or not
• 10. Write a program to Find all the roots of a quadratic equation in C

## 11. Write a Program to reverse a number.

12. check whether a number is a palindrome..

• 13. Write a C Program to check if two numbers are equal without using the bitwise operator
• 14. Write a Â C program to find the GCD of two numbers
• 15. Write a Â C program to find the LCM of two numbers
• 16. Write a C Program to find the Maximum and minimum of two numbers without using any loop or condition
• 17. Write a Program in C to Print all natural numbers up to N without using a semi-colon

## 18. Write a Program to find the area of a circle.

• 19. Â Write a Program to create a pyramid pattern using C.
• 20. Write a program to form Pascal Triangle using numbers
• 21. Write a Program to return the nth row of Pascal's triangle
• 22. Write a program to reverse an Array
• 23. Write a program to check the repeating elements in C
• 24. Write a Program to print the Maximum and Minimum elements in an array
• 25. Write a Program for the cyclic rotation of an array to k positions

## 26. Write a Program to sort First half in Ascending order and the Second in Descending order.

27. write a program to print sums of all subsets in an array..

• 28. Write a Program to Find if there is any subarray with a sum equal to 0
• 29. Write a C program to Implement Kadane's Algorithm

## 30. Write a Program to find the transpose of a matrix.

• 31. Write a Program to Rotate a matrix by 90 degrees in the clockwise direction in C
• 32. Write a Program to find the Spiral Traversal of a Matrix in C

## 33. Write a program to count the sum of numbers in a string.

34. program to calculate the length of the string., 35. write a program to check string is a palindrome., 36. write a program to print all permutations of a given string in lexicographically sorted order in c., 37. write a program to calculate the power of a number using recursion in c., 38. write a code to print the fibonacci series using recursion., 39. write a program to find the hcf of two numbers using recursion., 40. write a program in c to reverse a string using recursion..

• 41. Â Write a C Program to search elements in an array.
• 42. Â Write a C Program to search elements in an array using Binary Search.
• 43. Write a C Program to sort arrays using Bubble, Selection, and Insertion Sort

## 44. Write a C Program to sort arrays using Merge Sort.

45. write a c program to sort arrays using quick sort., 46. write a program to sort an array using pointers., 47. write a c program to store information about students using structure.

• 48. Write a C Program To Add Two Complex Numbers Using Structures And Functions.

## 49. Write a C Program to add Two Distance Given as Input in Feet and Inches

50. write a c program to reverse a linked list iteratively.

C is the most popular programming language developed by Dennis Ritchie at the Bell Laboratories in 1972 to develop the UNIX operating systems. It is a general-purpose and procedural programming language. It is faster than the languages like Java and Python. C is the most used language in top companies such as LinkedIn, Microsoft, Opera, Meta, and NASA because of its performance. To get into these companies and other software companies, you need to master some important C coding questions to crack their C Online Assessment round and coding interview.

C Coding Interview Questions and Answers

This article on C Coding Interview Questions offers a comprehensive collection of practice questions suitable for both beginners and advanced learners.

## List of 50 C Coding Interview Questions and Answer

Here is a list of 50 C coding interview questions and answers:

## 2. Write a Program to check whether a number is prime or not.

3. write a c program to calculate compound interest., 5. write a program to replace all 0’s with 1’s in a number., 7.  write a program to check if the year is a leap year or not., 9. write a program to check if a number is an armstrong number or not., 10. write a program to find all the roots of a quadratic equation in c., 13. write a c program to check if two numbers are equal without using the bitwise operator. , 14. write a  c program to find the gcd of two numbers., 15. write a  c program to find the lcm of two numbers., 16. write a c program to find the maximum and minimum of two numbers without using any loop or condition. , 17. write a program in c to print all natural numbers up to n without using a semi-colon., 19.  write a program to create a pyramid pattern using c., 20. write a program to form pascal triangle using numbers., 21. write a program to return the nth row of pascal’s triangle., 22. write a program to reverse an array., 23. write a program to check the repeating elements in c., 24. write a program to print the maximum and minimum elements in an array., 25. write a program for the cyclic rotation of an array to k positions., 28. write a program to find if there is any subarray with a sum equal to 0., 29. write a c program to implement kadane’s algorithm, 31. write a program to rotate a matrix by 90 degrees in the clockwise direction in c., 32. write a program to find the spiral traversal of a matrix in c., 41.  write a c program to search elements in an array., 42.  write a c program to search elements in an array using binary search., 43. write a c program to sort arrays using bubble, selection, and insertion sort., 48.  write a c program to add two complex numbers using structures and functions..

In this C coding interview questions and answers, we’ve compiled a wide-range of practice questions suitable for individuals at all levels, from beginners to advanced learners. Exploring these questions and their solutions will not only enhance your proficiency in C but also prepare you for a successful coding interview experience.

## C Coding Interview Questions – FAQs

Q: what are the most common c coding interview questions.

The most common C coding interview questions are designed to test your knowledge of the following topics: C syntax and semantics Data structures and algorithms Memory management Pointers File I/O Some specific examples of common C coding interview questions include: Reverse a linked list. Implement a binary search tree. Write a function to find the maximum element in an array. Explain the difference between a pointer and an array. What is the difference between a function declaration and a function definition? How do you allocate memory on the heap? How do you free memory that has been allocated on the heap? What is a dangling pointer? How do you read and write data to a file?

## Q. Who can benefit from these C coding interview questions and answers?

These questions are designed to benefit anyone preparing for a C coding interview. Whether you’re a beginner looking to learn the fundamentals or an experienced programmer aiming to enhance your C skills, this resource can assist you in your preparation.

## Q: How can I use these questions effectively in my interview preparation?

Start by assessing your current level of expertise in C programming language. Then, you can use these questions to gradually build your skills up and knowledge. Practice solving them on your own, and review the explanations to ensure a thorough understanding.

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Home » C solved programs

## Frequently asked C Programs for interview

Frequently asked C Programs for Interview: Here is the list of most important/ frequently asked c programs in interviews .

IncludeHelp has a large collection of solved c programs , c++ programs , java programs , Data Structure programs , Scala programs , VB.Net programs .

Here we are providing a list of most asked interview programs of c programming language, if you are looking for a job or job changed. We would recommend, you should learn all these programs.

These programs will help you to crack technical round of the interview, even c programming interview. We selected these programs from available list of the solved programs. Some program contains tough logic and some are based on tricks.

These programs will be helpful to freshers and experienced both; even if you are not looking for job, you should go through these program to improve your programming skills.

## List of most important & commonly asked c programs in interviews...

These are the some of the C programs for interview, practice these programs to prepare for the interview.

• C program to find factorial of a number .
• Program to swap two bits .
• Program to swap two words/nibbles of a byte.
• C program to swap two numbers without using third variable.
• Program to check whether number is Palindrome or not
• Program to check whether number is Perfect square or not
• Program to print "Hello World" without using semicolon .
• Program to check whether number is Prime or not.
• Program to check whether number is palindrome or not.
• C program to check whether a number if Armstrong or not.
• C program to check whether a number if Even or Odd .
• C program to print all leap years from 1 to N.
• C program to convert temperature from Celsius to Fahrenheit and vice versa.
• C program to convert number from Decimal to Binary .
• C program to convert number from Binary to Decimal .
• Program to compare two strings without using strcmp().
• Program to copy string without sing strcpy().
• Program to find an element from one dimensional array.
• Program to delete an element from one dimensional array.
• Program to swap adjacent elements of one dimension array.
• Program to transpose a matrix .
• Program to multiply two matrices .
• Program to print source code as program output.

## List of other C programming advanced programs for interview

• Stringizing Operator in C - Program to print variable name in C.
• Function Pointer example program in C programming.
• C program to get current System Date and Time in Linux.
• C program to implement gotoxy() , clrscr() , getch() , getche() for GCC, Linux .
• C program to find the size of a file in Linux.
• C program to get Process Id and Parent Process Id in Linux.
• fork() function explanation and examples in Linux C.
• C program to Get Computer System IP Address in Linux .
• C program to Set Computer System IP Address in Linux .
• C program to design flying characters Screen Saver .
• C program to design a TIC TAC TOE game .
• Age Calculator (C program to calculate age).
• C program to design love calculator .
• C program to guess a random number .
• C program to check given string is a valid IPv4 address or not .
• C program to convert String into Hexadecimal .
• C program to demonstrate example of Variable Arguments .
• C program to store time in an integer variable .
• C program to store date in an integer variable .
• C program to remove consecutive repeated characters from string.
• EMI Calculator (C program to calculate EMI).
• C program to validate date (Check date is valid or not).
• C program to format/extract ip address octets.
• C program to implement substring function .
• C program to design a digital clock .
• C program to convert hexadecimal Byte to integer .
• C program to extract bytes from an integer (Hexadecimal) value .
• C program to print character without using format specifiers .
• C program to find Binary Addition and Binary Subtraction .
• C program to print weekday of given date .
• C program to calculate compound interest .

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