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 9218

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

3 5510

write a string copy function routine?

2 5013

swap two integer variables without using a third temporary variable?

Persistent,

6 10580

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

1 3602

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

Infosys, TATA,

13 34295

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

CTS, TCS, Wipro,

9 15154

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

4 5784

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

2 8051

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

5 8823

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

4 7942

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

College School Exams Tests, HCL, TCS,

2 7697

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

1 3907

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 4573

What is the relation between # and include

HCL,

5 8965

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Un-Answered Questions { C }

Hi can anyone tell what is a start up code?

2086

Explain what are the different file extensions involved when programming in c?

1121

Write a function that will take in a phone number and output all possible alphabetical combinations

1057

What is the modulus operator?

1221

Why c is called procedure oriented language?

1061

Explain what is #line used for?

1078

Why is c fast?

1074

Explain what header files do I need in order to define the standard library functions I use?

1177

What are header files in c programming?

1141

What is realloc in c?

1127

What is dynamic dispatch in c++?

1072

What is the use of getch ()?

1078

What is sizeof return in c?

1042

GIven a sequence of characters. How will you convert the lower case characters to upper case characters. ( Try using bit vector - sol given in the C lib -> typec.h)

1112

State the difference between realloc and free.

1101

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