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 7858

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 14233

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

3 11802

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 16606

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

3 6741

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 13746

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 11637

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

7 8641

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 15678

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 71937

in iso what are the common technological language?

1558

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

NetApp, PTU, Wipro,

1 6112

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

Wipro,

3 12929

Add 2 64 bit numbers on a 32 bit machine

EMC, Hyderabad Central University, NetApp,

3 16237

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

9 34819


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Un-Answered Questions { C }

Can one function call another?

555


What is nested structure?

516


Why is not a pointer null after calling free? How unsafe is it to use (assign, compare) a pointer value after it is been freed?

529


Is it better to use a macro or a function?

579


What are register variables? What are the advantage of using register variables?

592






What does %p mean c?

550


Why pointers are used?

561


Write a program to identify if a given binary tree is balanced or not.

624


What are categories used for in c?

502


Give me the code of in-order recursive and non-recursive.

762


Write a program to swap two numbers without using a temporary variable?

545


What are pointers? What are stacks and queues?

522


program to find out date after adding 31 days to a date in the month of febraury also consider the leap year

2482


What are high level languages like C and FORTRAN also known as?

595


How do you list a file’s date and time?

569