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?

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?

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,

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, Solartis, TCS, ThinkBox, Trine,

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).

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

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?

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

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

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

Motorola, nvidia,

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

how to find that no is int or float?

can we access one file to one directory?

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

Hindustan, L&T,

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