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

C Interview Questions

Questions Answers Views Company eMail

How to reverse a linked list

Aricent, Fidelity, IBM, TCS,

1 6688

1. Write a C program to count the number of occurrence of a specific word in the given strings. (for e.g. Find how many times the word “live” comes in the sentence “Dream as if you’ll live forever, live as if you’ll die today ”)

Eskom, TCS,

12 76325

write a c program to store and print name,address,roll.no of a student using structures?

7 71486

Write a C program to remove the repeated characters in the entered expression or in entered characters(i.e) removing duplicates

3 9052

Reverse the bit order in a single macro. eg. i/p = 10010101 --> o/p = 10101001

2 6551

implement NAND gate logic in C code without using any bitwise operatior.

Alcatel,

4 32904

implement OR gate without using any bitwise operator.

Alcatel, Wipro,

1 5885

Is the below things valid & where it will be stored in memory layout ? static const volatile int i; register struct { } ; static register;

Lucent,

2 5428

in one file global variable int i; is declared as static. In another file it is extern int i=100; Is this valid ?

Infosys, NetApp,

4 8517

what is difference between C and C++

4 7551

which is faster execution: loops or recursion?

3 7119

#include #include void main() {clrscr(); char another='y'; int num; for(;another=='y';) { printf("Enter a number"); scanf("%d",&num); printf("squre of %d is %d",num,num*num); printf("\nwant to enter another number y/n"); scanf("%c",&another); } getch(); } the above code runs only one time.on entering 'y' the screen disappeares.what can i do?

3 7841

Simplify the program segment if X = B then C ← true else C ← false

3019

what is computer

4 6139

we compile c program in 32 processor and 64 bit processor .exe file is created in both the processors. if we want to run .exe file in 64 bit processor which is created in 32 bit processor. is that .exe file is run or not if it is not run why?

HP, Wipro,

4 8558

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Un-Answered Questions { C }

Explain is it valid to address one element beyond the end of an array?

1218

What is structure in c language?

1174

What does c mean in standard form?

1182

Write a progarm to find the length of string using switch case?

2069

What are volatile variables in c?

949

Explain how can you restore a redirected standard stream?

1102

What is the data segment that is followed by c?

1092

What is malloc calloc and realloc in c?

1332

What kind of structure is a house?

1048

what is a constant pointer in C

1177

How many levels deep can include files be nested?

1142

What is the general form of #line preprocessor?

997

Write a function expand(s1,s2) that expands shorthand notations like a-z in the string s1 into the equivalent complete list abc...xyz in s2 . Allow for letters of either case and digits, and be prepared to handle cases like a-b-c and a-z0-9 and -a-z. z-a:zyx......ba -1-6-:-123456- 1-9-1:123456789987654321 a-R-L:a-R...L a-b-c:abbc

5646

Discuss the function of conditional operator, size of operator and comma operator with examples.

1159

Why doesnt long int work?

1042

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