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

C Interview Questions

Questions Answers Views Company eMail

To what value are pointers initialized? 1) NULL 2) Newly allocated memory 3) No action is taken by the compiler to initialize pointers.

Aricent,

4 9944

Which of the following sorts is quickest when sorting the following set: 1 2 3 5 4 1) Quick Sort 2) Bubble Sort 3) Merge Sort

7 16926

Which of the following data structures is on average the fastest for retrieving data: 1) Binary Tree 2) Hash Table 3) Stack

3 13863

Evaluate the following: int fn(int v) { if(v==1 || v==0) return 1; if(v%2==0) return fn(v/2)+2; else return fn(v-1)+3; } for fn(7); 1) 10 2) 11 3) 1

6 20553

What character terminates all strings composed of character arrays? 1) 0 2) . 3) END

3 8127

True or false: If you continuously increment a variable, it will become negative? 1) True 2) False 3) It depends on the variable type

7 16660

Which of the following is not a valid declaration for main ()? 1) int main() 2) int main(int argc, char *argv[]) 3) They both work

2 13179

Which is not valid in C? 1) class aClass{public:int x;} 2) /* A comment */ 3) char x=12;

7 11372

void swap(int a,int b) { a=a+b; b=a-b; a=a-b; } in this code always gives the same result for all case

Accenture, TCS,

9 19071

if a five digit number is input through the keyboard, write a program to calculate the sum of its digits. (hint:-use the modulus operator.'%')

23 81502

in iso what are the common technological language?

2165

Write a program or provide a pseudo code to flip the 2nd bit of the 32 bit number ! (Phone Screen)

NetApp, PTU, Wipro,

1 7010

what is the diff b/w static and non static variables in C. Give some examples plz.

Wipro,

3 14419

Add 2 64 bit numbers on a 32 bit machine

EMC, Hyderabad Central University, NetApp,

3 17715

Write a program to accept a character & display its corrosponding ASCII value & vice versa?

9 38462

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Un-Answered Questions { C }

How many header files are in c?

1069

What are static variables in c?

1133

What is the difference between volatile and const volatile?

1053

Write a C program on Centralized OLTP, Decentralized OLTP using locking mechanism, Semaphore using locking mechanism, Shared memory, message queues, channel of communication, sockets and a simple program on Saving bank application program using OLTP in IPC?

2758

Explain what is the most efficient way to store flag values?

1275

Can you explain what keyboard debouncing is, and where and why we us it? please give some examples

2251

What are actual arguments?

1158

Is c language still used?

1046

write a program to find the given number is prime or not

4851

What is wrong with this declaration?

1160

Write a c program to build a heap method using Pointer to function and pointer to structure ?

4755

Why use int main instead of void main?

1183

What is a stream water?

1285

What is union and structure in c?

1293

What is typedef?

1512

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