Dear CareersValley Reader,

Below are four solved C interview questions. Though this question set is tagged under TCS sample questions, similar questions can be expected during other interviews too.

Interview Question 1

Which of the following program structure/component/statement is not an example for implementation of modularization ?

Options : a) DLL b) Functions c) type casting

Answer :

Option c) type casting. DLL and Functions help in modularization of a program while typecasting just converts from one data type to another.

Interview Question 2

Can a program be invoked from another program ? If yes, how it can be done ?

Answer :

Yes, a program can invoke another program using system calls.

Interview Question 3

Most of you would be knowing "Register" variables are the ones stored in CPU for faster access. Is there a crude way to determine data size for register variables.

Answer :

Yes, generally the size would be less than or equal to integer data size. There are exceptions too.

Interview Question 4

Is it necessary to use register modifier on all compilers irrespective of whether they are old or modern ones ?

Answer :

No, compilers nowadays are intelligent enough to decide which variables need to be kept in CPU registers depending upon the estimated usage.