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

C Interview Questions

Questions Answers Views Company eMail

what is the difference between. system call and library function?

CDAC, Satyam,

2 20589

struct ptr { int a; char b; int *p; }abc; what is d sizeof structure without using "sizeof" operator??

Verifone,

9 16323

what is diff b/w huge & far & near pointer??

HCL,

1 4533

write a function for strtok()??

Verifone,

2 10390

what is the output of the following program and explain the answer #include exp() { main(5) } main(int a) { printf("%d",a); return; }

Satyam,

3 7320

what is difference b/w extern & volatile variable??

Teleca,

6 15391

what is the differnce between programing langauge and tool? is sas is a programing langauge r tool?

Gamesa, Satyam,

2467

design and implement a program that reads floating-points numbers in a sentinel-controlled loop until the user terminates the program by entering zero.your program should determinate and print the smallest,largest and average of the supplied numbers.

2 6283

i want to have a program to read a string and print the frequency of each character and it should work in turbo c

Persistent, Wipro,

3 9393

here is a link to download Let_Us_C_-_Yashwant_Kanetkar

Microsoft,

3 11462

How do you write a program which produces its own source code as its output?

2 5694

what is the importance of spanning tree?

2085

How to reverse a string using a recursive function, with swapping?

5 9108

How to Clear last bit if it 1 using Macro TURN_OFF_BIT_LAST

Adobe, Huawei,

6 11980

what is pointer

TCS,

1 5164

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Un-Answered Questions { C }

Explain what is the benefit of using enum to declare a constant?

1138

Why doesnt this code work?

1130

What are shell structures used for?

1099

What is a stream water?

1287

design and implement a data structure and performs the following operation with the help of file (included 1000 student marks in 5 sub. and %also) 1.how many students are fail in all 5 subjects (if >35) 2. delete all student data those are fail in all 5 subjects. 3. update the grace marks (5 no. if exam paper is 100 marks) 4. arrange the student data in ascending order basis of marks. 5.insert double of deleted students with marks in the list.

2034

Is there a way to jump out of a function or functions?

1171

What are keywords in c with examples?

1157

Who developed c language?

1153

What is difference between arrays and pointers?

1156

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)

1211

Explain what is the use of a semicolon (;) at the end of every program statement?

1265

What is a pointer in c?

1701

What is s in c?

1099

Why do some versions of toupper act strangely if given an upper-case letter?

1120

Write the Program to reverse a string using pointers.

1076

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