C Interview Questions
Questions Answers Views Company eMail

24.what is a void pointer? 25.why arithmetic operation can’t be performed on a void pointer? 26.differentiate between const char *a; char *const a; and char const *a; 27.compare array with pointer? 28.what is a NULL pointer? 29.what does ‘segmentation violation’ mean? 30.what does ‘Bus Error’ mean? 31.Define function pointers? 32.How do you initialize function pointers? Give an example? 33.where can function pointers be used?

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34.what are bitwise shift operators? 35.what are bit fields? What is the use of bit fields in a structure declaration? 36.what is the size of an integer variable? 37.what are the files which are automatically opened when a c file is executed? 38.what is the little endian and big endian? 39.what is the use of fflush() function? 40.what is the difference between exit() and _exit() functions? 41.where does malloc() function get the memory? 42.what is the difference between malloc() and calloc() function? 43.what is the difference between postfix and prefix unary increment operators?

3 4020

44.what is the difference between strcpy() and memcpy() function? 45.what is output of the following statetment? 46.Printf(“%x”, -1<<4); ? 47.will the program compile? int i; scanf(“%d”,i); printf(“%d”,i); 48.write a string copy function routine? 49.swap two integer variables without using a third temporary variable? 50.how do you redirect stdout value from a program to a file? 51.write a program that finds the factorial of a number using recursion?

Amdocs,

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52.write a “Hello World” program in “c” without using a semicolon? 53.Give a method to count the number of ones in a 32 bit number? 54.write a program that print itself even if the source file is deleted? 55.Given an unsigned integer, find if the number is power of 2?

Datamatics, TCS, Solartis, ThinkBox, Trine,

25 43146

Given an array A[n+m] of n+m numbers, where A[1] ... A[n] is sorted and A[n+1] ... A[n+m] is sorted. Design a linear time algorithm to obtain A[1...n+m] sorted using only O(1) extra space. Time Complexity of your algorithm should be O(n) and Space Complexity O(1).

888

What is meant by int fun const(int a, int b) { .... ... }

1 3786

How can I get Single byte from 'int' type variable? Can we alter single bit or multiple bits in int type variable? if so, How?

2 5336

Can we access RAM? How? Whats the range of access? Similarly What are other hardware we can access?

1 2380




Which command is more efficient? *(ptr+1) or ptr[1]

3 4114

Function to find the given number is a power of 2 or not?

Motorola, nvidia,

20 32367

Program to write some contents into a file using file operations with proper error messages.

2 3424

how to find that no is int or float?

5 5503

can we access one file to one directory?

1 2401

will u give me old quesrion papers for aptitude for L & t info tech?

L&T, Hindustan,

1 4066

Here is alphabets : abcdefgh 1) how to reverse. as hgfedcba 2) after reversal, how to group them in a pair hg fe dc ba.

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Un-Answered Questions { C }

Write a program to replace n bits from the position p of the bit representation of an inputted character x with the one's complement. Method invertBit takes 3 parameters x as input character, p as position and n as the number of positions from p. Replace n bits from pth position in 8 bit character x. Then return the characters by inverting the bits.

2911


please explain every phase in the "SDLC" in the dotnet.

1469


what is the syallabus of computer science students in group- 1?

1126


Iam a B.Tech graduate and completed my engineering in 2009, from 2005 to 2009 and after that i had done nothing.Now i want to do job and get into BPO field . Friends give me suggestions as what to say in interview... if they ask me that what would you had done ... these many years without doing job ??????? pls urgent

726


write a c program to find the sum of five entered numbers using an array named number

971






Why is event driven programming or procedural programming, better within specific scenario?

1261


In this problem you are to write a program that will cut some number of prime numbers from the list of prime numbers between 1 and N.Your program will read in a number N; determine the list of prime numbers between 1 and N; and print the C*2 prime numbers from the center of the list if there are an even number of prime numbers or (C*2)-1 prime numbers from the center of the list if there are an odd number of prime numbers in the list.

693


largest Of three Number using without if condition?

253


find the output? void r(int a[],int c, int n) { if(c>n) { a[c]=a[c]+c; r(a,++c,n); r(a,++c,n); } } int main() { int i,a[5]={0}; r(a,0,5); for(i=0;i<5;i++) printf("\n %d",a[i]); getch(); }

1123


Why we not create function inside function.

994


which type of aspect you want from the student.

952


Draw a diagram showing how the operating system relates to users, application programs, and the computer hardware ?

1343


the question is that what you have been doing all these periods (one year gap)

982


1.int a=10; 2.int b=20; 3. //write here 4.b=30; Write code at line 3 so that when the value of b is changed variable a should automatically change with same value as b. 5.

946


illustrate the use of address operator and dereferencing operator with the help of a program guys plzzz help for this question

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