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

C Interview Questions

Questions Answers Views Company eMail

Write a program for finding factorial of a number.

Tech Mahindra,

1140

Program to find the sum of digits of a given number until the sum becomes a single digit. (e.g. 12345=>1+2+3+4+5=15=>1+5=6)

InterGraph,

1206

Difference between constant pointer and pointer to a constant.

Huawei,

1221

An application package has been provided to you without any documents for the following application. The application needs to be tested. How will you proceed?

Aspire, Infogain,

1288

Can include files be nested? How many levels deep can include files be nested?

Aspire, Infogain,

1199

What is the difference between a free-standing and a hosted environment?

Aspire,

1191

Write a code on reverse string and its complexity.

Expedia,

1089

What is a structure and why it is used?

Hexaware,

1291

Give differences between - new and malloc() , delete and free() ?

Genpact,

1150

Can a function argument have default value?

Genpact,

1204

Write a code to determine the total number of stops an elevator would take to serve N number of people.

Expedia,

1309

In a byte, what is the maximum decimal number that you can accommodate?

1195

Write a program to know whether the input number is an armstrong number.

Wipro,

1169

Can an array be an Ivalue?

EXL,

1137

State two uses of pointers in C?

Aspire, Infogain,

1106

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Un-Answered Questions { C }

What is the purpose of main() function?

1302

What are the 5 data types?

1208

In C programming, how do you insert quote characters (‘ and “) into the output screen?

1577

A c program to display count values from 0 to 100 and flash each digit for a secong.reset the counter after it reaches 100.use for loop,. pls guys hepl me.. :(

2306

What is realloc in c?

1164

Define Spanning-Tree Protocol (STP)

1177

What is the value of c?

1130

Write a program to display all the prime nos from 1 to 1000000, your code should not take time more than a minute to display all the nos.

2124

how to create duplicate link list using C???

2601

Is that possible to add pointers to each other?

1421

Why we use conio h in c?

1298

Can you write the function prototype, definition and mention the other requirements.

1197

Device an algorithm for weiler-atherton polygon clipping, where the clipping window can be any specified polygon

6018

a function gets called when the function name is followed by a a) semicolon (;) b) period(.) c) ! d) none of the above

1443

Is it valid to address one element beyond the end of an array?

1221

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