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C Interview Questions

Below we have listed all the C Interview Questions and answers. Feel free to comment on any C Interview Questions or answer by the comment feature available on the page.

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C is a high-level and general purpose programming language that is ideal for developing firmware or portable applications. Originally intended for writing system software, C was developed at Bell Labs by Dennis Ritchie for the Unix Operating System (OS) in the early 1970s. With the increasing popularity of object-oriented programming, C is being rapidly replaced as "the" programming language by C++, a superset of the C language that uses an entirely different set of programming concepts, and by Java, a language similar to but simpler than C++, that was designed for use in distributed networks.

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Subcategories for C Interview Questions & Answers :-

Following are sub categories for which Interview Questions & Answers are available under C Interview Questions & Answers. Please select the appropriate sub-category:-

Arrays in C Interview Questions & Answers (18) Exam Mode | Learning Mode

Branches & Loops in C Interview Questions & Answers (22) Exam Mode | Learning Mode

C Basics Interview Questions & Answers (92) Exam Mode | Learning Mode

Dynamic Memory Allocation in C Interview Questions & Answers (21) Exam Mode | Learning Mode

File Operations in C Interview Questions & Answers (16) Exam Mode | Learning Mode

Functions in C Interview Questions & Answers (59) Exam Mode | Learning Mode

Operators in C Interview Questions & Answers (22) Exam Mode | Learning Mode

Pointers in C Interview Questions & Answers (43) Exam Mode | Learning Mode

Strings in C Interview Questions & Answers (32) Exam Mode | Learning Mode

Structures in C Interview Questions & Answers (39) Exam Mode | Learning Mode

Variables in C Interview Questions & Answers (39) Exam Mode | Learning Mode

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Question
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What would be the output of the following program?

main()
{
int y=128;
const int x=y;
printf("%d",x);
}



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main(int x).............

explaination on arguments passed thr' main

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If the following program (myprog) is run from the command line as myprog friday tuesday sunday, What would be the output?

main(int argc, char*argv[])
{
printf("%c",**++argv);
}




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How would you obtain the current time and difference between two times?
0.3 Rating
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How to do a simple program simulation of a Rotation game?
A player chooses to move a box encompassing four numbers, and then chooses to either rotate the numbers
clockwise or counterclockwise.
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Write a C program that will convert Simple Sentence to Complex/Compound Sentence.
0.3 Rating
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What is the difference between the following statements?
int a[4]={1,2,3,4};
int a[]={1,2,3,4);
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What is :- Token , identifier , block , parameter , argument , scope of variable , Macro ?
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What is type integration? And what is integer type integration?
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Where is the prototype of the main function i.e how the execution startd from main function and how to find out the size of a function.
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Q.8 When a 'C' function call is made, the order in which parameters passed to the function are pushed into the stack is
(a) left to right
(b) right to left
(c) bigger variables are moved first than the smaller variables.
(d) smaller variables are moved first than the bigger ones
(c) none of the above.
0.3 Rating
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When should the register modifier be used? Does it really help ?
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If the following program (myprog) is run from the command line as myprog 1 2 3, What would be the output?

main(int argc, char *argv[])
{
int i,j=0;
for(i=0;i<argc;i++)
j=j+ atoi(argv[i]);
printf("%d",j);
}



0.3 Rating
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I want C program code for : Reverse the links of a linked list by traversing only once

Input:
The input consists of the information in each node of the linked list.

Output:
The program displays the information in the linked list after the links are reversed.

Sample Input:
Enter the information in the linked list (Enter -1 to exit): 10
20
30
40
50
-1


Sample Output:
After the links are reversed
Information in the linked list:
50
40
30
20
10




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What is the difference between a string copy (strcpy) and a memory copy (memcpy)? When should each be used?
0.2 Rating
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Would the following program compile?

main()
{
int a=10,*j;
void *k;
j=k=&a;
j++;
k++;
printf("n%u%u",j,k);
}




0.2 Rating
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main()
{
int i = 0xff ;
printf("n%d", i<<2);
}


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If the program (myprog) is run from the command line as myprog 1 2 3 , What would be the output?

main(int argc, char *argv[])
{
int i;
for(i=0;i<argc;i++)
printf("%s",argv[i]);
}




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How do you write a C program which can calculate lines of code but not counting comments?

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1.WRITE A 'C' PROGRAM TO READ THE AGE OF 100 PERSONS AND COUNT THE NUMBER OF PERSONS IN THE AGE GROUP 50 TO 60.USE FOR LOOP AND CONTINUE STATEMENTS.(10 MARKS)
2.WRITE A PROGRAM TO READ A POSITIVE INTEGER AND PRINT ITS BINARY EQUIVALENT.(10 MARKS)
3.GIVEN TWO ONE DIMENSIONAL ARRAYS A AND B WHICH ARE SORTED IN ASSCENDING ORDER.WRITE A PROGRAM TO MERGE THEM INTO A SINGLE SORTED ARRAY ,C THAT CONTAINS EVERY ITEM FROM ARRAYS A AND B,IN ASCENDING ORDER.(10 MARKS)
4.WRITE A FUNCTION IN C THAT WOULD TRAVERSE A LINEAR SINGLY LINKED LIST IN REVERSE AND WRITE OUT THE CONTENTS IN REVERSE ORDER.(10 MARKA)
5.WRITE A PROGRAM TO READ A SET OF INTEGERS AND TO SEPARATE ALL ODD AND EVEN NUMBERS .WRITE ALL EVEN NUMBERS IN ASCENDING ORDER.(10 MARKS)
6.WRITE A PROGRAM TO READ A REAL NUMBER X ANF FIND THE EVEN NUMBER NEAREST TO X.(10 MARKS)
7.WRITE A PROGRAM TO MULTIPLY TWO MATRICES OF ORDER M*N AND N*P RESPECTIVELY.(10 MARKS)
8.WRITE A PROGRAM IN'C' TO IMPLEMENT K-MAP SIMPLIFICATION TECHNIQUE.(10 MARKS)

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India News Network
Latest 20 Questions
Payment of time- barred debt is: (a) Valid (b) Void (c) Illegal (d) Voidable
Consideration is defined in the Indian Contract Act,1872 in: (a) Section 2(f) (b) Section 2(e) (c) Section 2(g) (d) Section 2(d)
Which of the following is not an exception to the rule, "No consideration, No contract": (a) Natural love and affection (b) Compensation for involuntary services (c) Completed gift (d) Agency
Consideration must move at the desire of: (a) The promisor (b) The promisee (c) The promisor or any other party (d) Both the promisor and the promisee
An offer which is open for acceptance over a period of time is: (a) Cross Offer (b) Counter Offer (c) Standing Offer (d) Implied Offer
Specific offer can be communicated to__________ (a) All the parties of contract (b) General public in universe (c) Specific person (d) None of the above
_________ amounts to rejection of the original offer. (a) Cross offer (b) Special offer (c) Standing offer (d) Counter offer
A advertises to sell his old car by advertising in a newspaper. This offer is caleed: (a) General Offer (b) Special Offer (c) Continuing Offer (d) None of the above
In case a counter offer is made, the original offer stands: (a) Rejected (b) Accepted automatically (c) Accepted subject to certain modifications and variations (d) None of the above
In case of unenforceable contract having some technical defect, parties (a) Can sue upon it (b) Cannot sue upon it (c) Should consider it to be illegal (d) None of the above
If entire specified goods is perished before entering into contract of sale, the contract is (a) Valid (b) Void (c) Voidable (d) Cancelled
______________ contracts are also caled contracts with executed consideration. (a) Unilateral (b) Completed (c) Bilateral (d) Executory
A offers B to supply books @ Rs 100 each but B accepts the same with condition of 10% discount. This is a case of (a) Counter Offer (b) Cross Offer (c) Specific Offer (d) General Offer
_____________ is a game of chance. (a) Conditional Contract (b) Contingent Contract (c) Wagering Contract (d) Quasi Contract
There is no binding contract in case of _______ as one's offer cannot be constructed as acceptance (a) Cross Offer (b) Standing Offer (c) Counter Offer (d) Special Offer
An offer is made with an intention to have negotiation from other party. This type of offer is: (a) Invitation to offer (b) Valid offer (c) Voidable (d) None of the above
When an offer is made to the world at large, it is ____________ offer. (a) Counter (b) Special (c) General (d) None of the above
Implied contract even if not in writing or express words is perfectly _______________ if all the conditions are satisfied:- (a) Void (b) Voidable (c) Valid (d) Illegal
A specific offer can be accepted by ___________. (a) Any person (b) Any friend to offeror (c) The person to whom it is made (d) Any friend of offeree
An agreement toput a fire on a person's car is a ______: (a) Legal (b) Voidable (c) Valid (d) Illegal
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