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 8705

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

7 14500

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

5 16076

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

1 4190

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

3 6113

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

2 8192

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

Satyam,

3 9058

What is the real difference between arrays and pointers?

Hexaware, Logic Pro, TCS,

27 66159

How do I declare a pointer to an array?

IBM,

6 14255

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

9 14521

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

Aloha Technology,

2 8677

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

8 20987

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

4 8786

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

1 6608

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

3 6177

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Un-Answered Questions { C }

What are the types of arrays in c?

1184

Can you mix old-style and new-style function syntax?

1106

What is the use of a static variable in c?

1064

What are pointers? What are different types of pointers?

1156

Are negative numbers true in c?

1073

Why does everyone say not to use scanf? What should I use instead?

1426

When should a type cast be used?

1027

while initialization of array why we use a[][2] why not a[2][]...?

2372

How can I run c program?

1184

The file stdio.h, what does it contain?

1173

What is the difference between abs() and fabs() functions?

1138

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

1088

What are the 4 types of organizational structures?

1110

Differentiate between null and void pointers.

1182

a number whose only prime factors are 2,3,5, and 7 is call humble number,,write a program to find and display the nth element in this sequence.. sample input : 2,3,4,11,12,13, and 100.. sample output : the 2nd humble number is 2,the 3rd humble number is 3,the 4th humble number is ,the 11th humble number is 12, the 12th humble number is 14, the 13th humble number is 15, the 100th humble number is 450.

5066

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