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

C Interview Questions

Questions Answers Views Company eMail

What's a "sequence point"?

3 8677

Why doesn't the code "int a = 1000, b = 1000; long int c = a * b;" work?

7 14439

What's wrong with "char *p; *p = malloc(10);"?

5 16017

I have a function which accepts, and is supposed to initialize,a pointer, but the pointer in the caller remains unchanged.

1 4169

I have a function which accepts a pointer to an int. How can I pass a constant like 5 to it?

3 6085

What does a run-time "null pointer assignment" error mean?

2 8168

what is meant by the "equivalence of pointers and arrays" in C?

Satyam,

3 9023

What is the real difference between arrays and pointers?

Hexaware, Logic Pro, TCS,

27 65946

How do I declare a pointer to an array?

IBM,

6 14207

How can I set an array's size at run time?

9 14458

When you call malloc() to allocate memory for a local pointer, do you have to explicitly free() it?

Aloha Technology,

2 8658

How does free() know how many bytes to free?

8 20930

What's the difference between calloc() and malloc()?

4 8737

What is alloca() and why is its use discouraged?

1 6598

What are .h files and what should I put in them?

3 6151

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Un-Answered Questions { C }

What is function in c with example?

1150

Explain the binary height balanced tree?

1183

What are header files in c programming?

1129

swap 2 numbers without using third variable?

1129

When should a far pointer be used?

1122

Can you please explain the difference between strcpy() and memcpy() function?

1067

What is the difference between declaring a variable and defining a variable?

1271

How will you print TATA alone from TATA POWER using string copy and concate commands in C?

1372

How do you determine the length of a string value that was stored in a variable?

1121

How can I direct output to the printer?

1319

using only #include and #include Write a program in C that will read an input from the user and print it back to the user if it is a palindrome. The string ends when it encounters a whitespace. The input string is at most 30 characters. Assume the string has no spaces and distinguish between and lowercase. So madam is a palindrome, but MadAm is not a palindrome. Use scanf and %s to read the string. Sample Test: Enter a string: madam madam is a palindrome. Enter a string: 09023 09023 is not a palindrome.

1809

.find the output of the following program? char*myfunc(char*ptr) { ptr +=3; return (ptr); } int main() { char*x,*y; x="HELLO"; y=myfunc(x); printf("y = %s ",y); return 0; }

2581

Describe static function with its usage?

1206

Why are all header files not declared in every c program?

1103

Explain what are multidimensional arrays?

1068

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