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

C Interview Questions

Questions Answers Views Company eMail

what is output of the following statetment?Printf(“%x”, -1<<4); ?

5 9183

will the program compile? int i; scanf(“%d”,i); printf(“%d”,i);

3 5482

write a string copy function routine?

2 4988

swap two integer variables without using a third temporary variable?

Persistent,

6 10548

how do you redirect stdout value from a program to a file?

1 3591

write a program that finds the factorial of a number using recursion?

Infosys, TATA,

13 34224

write a “Hello World” program in “c” without using a semicolon?

CTS, TCS, Wipro,

9 15108

Give a method to count the number of ones in a 32 bit number?

4 5756

write a program that print itself even if the source file is deleted?

2 8038

Given an unsigned integer, find if the number is power of 2?

5 8801

what is the difference between these initializations? Char a[]=”string”; Char *p=”literal”; Does *p++ increment p, or what it points to?

4 7920

differentiate between const char *a; char *const a; and char const *a;

College School Exams Tests, HCL, TCS,

2 7677

Why cann't whole array can be passed to function as value.

1 3897

Given a single Linked list with lakhs of nodes and length unknown how do you optimally delete the nth element from the list?

Oracle,

1 4569

What is the relation between # and include

HCL,

5 8937

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Un-Answered Questions { C }

What are lookup tables in c?

1001

How will you find a duplicate number in a array without negating the nos ?

2135

Why does this code crash?

1096

difference between object file and executable file

6723

What is a spanning Tree?

1587

application attempts to perform an operation?

1974

Why is c called c?

1020

What is the concatenation operator?

1150

Can you return null in c?

1167

Explain how do you determine whether to use a stream function or a low-level function?

1085

Explain the bubble sort algorithm.

1066

Dont ansi function prototypes render lint obsolete?

1127

What are the types of i/o functions?

1340

What are variables and it what way is it different from constants?

1242

Do you know null pointer?

1026

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