C Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

C Interview Questions

Questions Answers Views Company eMail

What is the difference between a structure and a union?

2 1187

How can you dynamically allocate memory in C?

2 1063

What are macros in C?

2 911

What is a segmentation fault?

2 958

What is the use of the sizeof operator?

2 1086

Explain the difference between fopen() and freopen().

2 987

What is the difference between calloc() and realloc()?

1 959

Explain #pragma in C.

1 779

What are dangling pointers?

1 791

What is undefined behavior?

1 812

What is the use of the restrict keyword?

1 737

What is an lvalue and an rvalue?

1 838

Can a program have multiple main() functions?

1 1019

What is the output of printf("%d", printf("Hello"));?

1 900

Why is C called a middle-level language?

1 802

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Un-Answered Questions { C }

Where are some collections of useful code fragments and examples?

1190

What is exit() function?

1068

What is structure padding and packing in c?

1124

how to construct a simulator keeping the logical boolean gates in c

2299

What is the c value paradox and how is it explained?

1107

What is the Purpose of 'extern' keyword in a function declaration?

1139

What is structure packing in c?

1136

What is malloc and calloc?

1100

What are the different types of endless loops?

1127

What are the advantages of union?

1117

Explain how can I prevent another program from modifying part of a file that I am modifying?

1138

What are the different types of objects used in c?

1079

Given a valid 24 hour format time find the combination of the value and write a program ,do not hard the value and if any other inputs provided should work with the logic implemented Input: 11:30 Output: 13:10 Input: 18:25 Output: 21:58

1573

pgm to find number of words starting with capital letters in a file(additional memory usage not allowed)(if a word starting with capital also next letter in word is capital cann't be counted twice)

2385

What are the different data types in C?

1244

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