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C Interview Questions
Questions Answers Views Company eMail

What is the difference between a structure and a union?

2 1095

How can you dynamically allocate memory in C?

2 972

What are macros in C?

2 808

What is a segmentation fault?

2 864

What is the use of the sizeof operator?

2 1011

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

2 903

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

1 853

Explain #pragma in C.

1 716

What are dangling pointers?

1 712

What is undefined behavior?

1 749

What is the use of the restrict keyword?

1 675

What is an lvalue and an rvalue?

1 769

Can a program have multiple main() functions?

1 935

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

1 828

Why is C called a middle-level language?

1 725


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Un-Answered Questions { C }

A collection of data with a given structure for excepting storing and providing on demand data for multiple users a) linked list b) datastructer c) database d) preprocessor

1099


Define circular linked list.

1031


Explain the priority queues?

1078


What is the best way to store flag values in a program?

1081


Why does the call char scanf work?

1206


the real constant in c can be expressed in which of the following forms a) fractional form only b) exponential form only c) ascii form only d) both a and b

2679


What are the functions to open and close file in c language?

1203


Device an algorithm for weiler-atherton polygon clipping, where the clipping window can be any specified polygon

5953


How can you allocate arrays or structures bigger than 64K?

1140


#include int main(){ int i=10; int *ptr=&i; *ptr=(int *)20; printf("%d",i); return 0; } Output: 20 can anyone explain how came the output is 20

1724


How can I rethow can I return a sequence of random numbers which dont repeat at all?

1192


write a c program thal will find all sequences of length N that produce the sum is Zero, print all possible solutions?

2869


Where we use clrscr in c?

1140


What is the scope of static variable in c?

1023


What is the purpose of type declarations?

1119