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# List of all Coding Interview Questions asked in Mass Recruitment Companies

• Write a C program where 1 to 7 should be printed 8 9 10 should not be and 11 to 20 should be using a break and continue. C | C++ | Java | Python
• Write a C program for Fibonacci series C | C++ | Java | Python
• Program to Print Fibonacci Series using Recursion C | C++ | Java | Python
• Write a program to print the pyramid star pattern C | C++ | Java | Python
• Program to Print Factorial of a Number C | C++ | Java | Python
• Factorial of a number using Recursion C | C++ | Java | Python
• LCM of two Numbers C | C++ | Java | Python
• Write a program to check given number is a perfect number or not. C | C++ | Java | Python
• Write a program to check if a number is a perfect number of not using Recursion C | C++ | Java | Python
• Write a program to check given number is Armstrong number or not. C | C++ | Java | Python
• Write a program to check given number is a strong number or not. C | C++ | Java | Python
• C program to check a number is odd or even. C | C++ | Java | Python
• Write a c program to check given number is palindrome number or not. C | C++ | Java | Python
• Write a Progam to check if a given string palindrome? C | C++ | Java | Python
• Write a c program to solve quadratic equation. C | C++ | Java | Python (Not Now)
• Write a c program to print Fibonacci series of given range. C | C++ | Java | Python
• Write a program to count Fibonacci series Number in a given range C | C++ | Java | Python
• Write a c program for Floyd’s triangle. C | C++ | Java | Python
• Write a c program to print Pascal triangle. C | C++ | Java | Python
• Write a c program to generate multiplication table. C | C++ | Java | Python
• Write a c program to print ASCII value of all characters. C | C++ | Java | Python
• Write a Program to Print Hello World (Simple) C | C++ | Java | Python
• Program to print hello world without using semicolon C | C++ | Java | Python
• Program to print hello world without using printf or cout C | C++ | Java | Python
• Program to print hello world without using header file C
• print hello world without using main Function C
• Program to Print Hello World 10 times using for Loop C | C++ | Java | Python

On Numbers

• Write a c program to reverse any number. C | C++ | Java | Python
• Write a c program to find out sum of digit of given number. C | C++ | Java | Python
• Write a c program to find out power of number. C | C++ | Java | Python
• Write a c program to add two numbers without using addition operator. C | C++ | Java | Python
• Write a c program to subtract two numbers without using subtraction operator. C | C++ | Java | Python
• Write a c program to find largest among three numbers using binary minus operator. C | C++ | Java | Python
• Write a c program to find largest among three numbers using conditional operator C | C++ | Java | Python
• Write a c program to find out generic root of any number. C | C++ | Java | Python
• Write a c program to find out NCR factor of given number. C | C++ | Java | Python
• How to convert string to int without using library functions in c C | C++ | Java | Python
• Program in c to print 1 to 100 without using loop C | C++ | Java | Python
• C program for swapping of two numbers C | C++ | Java | Python
• Program to find largest of n numbers in c C | C++ | Java | Python
• Split number into digits in c programming C | C++ | Java | Python
• C program to count number of digits in a number C | C++ | Java | Python
• Prime Factor of a Given Number C | C++ | Java | Python
• Write a program to check given number is a prime number or not. C | C++ | Java | Python
• Program to print all the prime numbers in a given range C | C++ | Java | Python
• Program to print prime numbers between 1 to 100 C | C++ | Java | Python
• Program to Print all Prime Numbers less than a given number in comma separated format C | C++ | Java | Python

Questions on Recursion

• Sum of n numbers using recursion in c C | C++ | Java | Python
• Matrix multiplication using recursion in c
• Multiplication using recursion in c
• Lcm using recursion in c
• Using recursion in c find the largest element in an array
• Prime number program in c using recursion
• Decimal to binary conversion in c using recursion
• C program for fibonacci series using recursion
• Reverse a string using recursion
• Write a program for palindrome using recursion
• Find factorial of a number using recursion in c program
• Find gcd of a number using recursion in c program
• Find sum of digits of a number using recursion using cprogram
• Find power of a number using recursion using c program
• Binary search through recurssion using c program
• Reverse a number using recursion in c program

Swapping

• Write a c program to swap two numbers.
• Write a c program to swap two numbers without using third variable.
• Write a c program for swapping of two arrays.
• Write a c program for swapping of two string.

Conversions

• Write a c program to convert decimal number to binary number.
• Write a c program to convert decimal number to octal number.
• Write a c program to convert decimal number to hexadecimal number.
• Write a c program to convert octal number to binary number.
• Write a c program to convert octal number to decimal number.
• Write a c program to convert octal number to hexadecimal number.
• Write a c program to convert hexadecimal number to binary number.
• Write a c program to convert hexadecimal number to octal number.
• Write a c program to convert hexadecimal number to decimal number.
• Write a c program to convert binary number to octal number.
• Write a c program to convert binary number to decimal number.
• Write a c program to convert binary number to hexadecimal number.
• C program for addition of binary numbers.
• C program for multiplication of two binary numbers.
• C program fractional binary conversion from decimal.
• C program for fractional decimal to binary fraction conversion.
• C program to convert decimal number to roman.
• C program to convert roman number to decimal number.
• C program to convert each digits of a number in words
• C program to convert currency or number in word.

Strings

• Write a c program to convert the string from upper case to lower case.
• Write a c program to convert the string from lower case to upper case.
• Write a c program to delete the all consonants from given string.
• Write a c program to count the different types of characters in given string.
• Write a c program to sort the characters of a string.
• Write a c program for concatenation two strings without using string.h header file.
• Write a c program to find the length of a string using pointer.
• Write a c program which prints initial of any name.
• Write a c program to print the string from given character.
• Write a Program to remove a Vowel from a String
• Write a c program to reverse a string
• Reverse a string using recursion in c
• String concatenation in c without using strcat
• How to compare two strings in c without using strcmp
• String copy without using strcpy in c
• Convert a string to ASCII in c

Matrix

• Write a c program for addition of two matrices.
• Write a c program for subtraction of two matrices
• Write a c program for multiplication of two matrices.
• Write a c program to find out sum of diagonal element of a matrix.
• Write a c program to find out transport of a matrix.
• Write a c program for scalar multiplication of matrix.
• C program to find inverse of a matrix
• Lower triangular matrix in c
• Upper triangular matrix in c
• Strassen’s matrix multiplication program in c
• C program to find determinant of a matrix

Series

1. Write a c program to find out the sum of series 1 + 2 + …. + n.
2. Write a c program to find out the sum of series 1^2 + 2^2 + …. + n^2.
3. Write a c program to find out the sum of series 1^3 + 2^3 + …. + n^3.
4. Write a c program to find out the sum of given A.P.
5. Write a c program to find out the sum of given G.P.
6. Write a c program to find out the sum of given H.P.
7. Write a c program to find out the sum of series 1 + 2 + 4 + 8 … to infinity.

Array

1. Write a c program to find out largest element of an array.
2. Write a c program to find out second largest element of an unsorted array.
3. Write a c program to find out second smallest element of an unsorted array.
4. Write a c program which deletes the duplicate element of an array.
5. Write a c program for delete an element at desired position in an array.
6. Write a c program for insert an element at desired position in an array.
7. C program to find largest and smallest number in an array

Sorting

1. Write a c program for bubble sort.
2. Write a c program for insertion sort.
3. Write a c program for selection sort.
4. Write a c program for quick sort.
5. Write a c program for heap sort.
6. Write a c program for merge sort.
7. Write a c program for shell sort.

Recursion

1. Write a c program to find factorial of a number using recursion.
2. Write a c program to find GCD of a two numbers using recursion.
3. Write a c program to find out sum digits of a number using recursion.
4. Write a c program to find power of a number using function recursion.
5. Write a c program to reverse any number using recursion.

Size of data type

1. Write a c program to find the size of int without using sizeof operator.
2. Write a c program to find the size of double without using sizeof operator.
3. Write a c program to find the size of structure without using sizeof operator.
4. Write a c program to find the size of union without using sizeof operator.

Using pointer

1. Write a c program for concatenation two string using pointer.

Searching

1. Write a c program for linear search.
2. Write a c program for binary search.
3. Write a c program for binary search using recursion.

Area and volume

1. Write a c program to find the area of circle.
2. Write a c program to find the area of any triangle.
3. Write a c program to find the area of equilateral triangle.
4. Write a c program to find the area of right angled triangle.
5. Write a c program to find the area of rectangle.
6. Write a c program to find the area of trapezium.
7. Write a c program to find the area of rhombus.
8. Write a c program to find the area of parallelogram.
9. Write a c program to find the volume and surface area of cube.
10. Write a c program to find the volume and surface area of cuboids.
11. Write a c program to find the volume and surface area of cylinder.
12. Write a c program to find the surface area and volume of a cone.
13. Write a c program to find the volume and surface area of sphere.
14. Write a c program to find the perimeter of a circle, rectangle and triangle.

C program with very large numbers

1. Write a c program to find factorial of 100 or very large numbers
2. Write a c program to multiply the two very large number (larger the long int)
3. Write a c program for division of large number (larger than long int)
4. C code for modular division of large number.
5. C code for division of large number.
6. C code for power of large numbers.