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,

1089

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,

1159

Difference between constant pointer and pointer to a constant.

Huawei,

1149

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,

1236

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

Aspire, Infogain,

1172

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

Aspire,

1148

Write a code on reverse string and its complexity.

Expedia,

1036

What is a structure and why it is used?

Hexaware,

1229

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

Genpact,

1100

Can a function argument have default value?

Genpact,

1154

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

Expedia,

1259

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

1142

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

Wipro,

1125

Can an array be an Ivalue?

EXL,

1098

State two uses of pointers in C?

Aspire, Infogain,

1063

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Un-Answered Questions { C }

Tell me the use of bit field in c language?

1071

What is the purpose of ftell?

1085

When I set a float variable to, say, 3.1, why is printf printing it as 3.0999999?

1071

Explain how can type-insensitive macros be created?

999

Differentiate between null and void pointers.

1169

What is meant by initialization and how we initialize a variable?

1051

What is a const pointer in c?

1132

What are void pointers in c?

997

What is the difference between procedural and functional programming?

1081

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.

5064

Do character constants represent numerical values?

1347

What are the different data types in C?

1205

What are shell structures used for?

1054

Implement bit Array in C.

1147

What are the types of functions in c?

989

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