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What is the meaning memory allocation & why we use it?
yagnam ramesh babu
- Nov 5th, 2007
allocation of memory for a particular variable like is done because to save unusage of memory
Gautam Bhalla
- Jul 20th, 2007
Memory Allocation:--Memory allocation is nothing but allocation of a block of memory or storage register from RAM to keep track of previous instractions or variables we are dealing with.Need:-Memory allocarion is important to keep the track of current value of the data items and instructions.
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Is nesting of conditional operator( ? : ) possible? If no then why? If yes then write down the program to find the greatest of three number?
Yes, Nesting of conditional operator is possible .Write down the program yourself.
baseersd
- Oct 31st, 2007
Conditional operator can be nested. But it is not recommended as there are chances of getting confuse with its statements. Here is the code for nesting of conditional operator.#include <stdio.h>...
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What is the difference between declaring a structure in C like : 1) typedef struct and2) struct
sarathi trichy
- Oct 25th, 2007
Typedef struct means : it tells the allies name of structEX:typedef struct{int data,y;float s;}sa;sa s1,s2;struct: struct is a keyword for define a multlple type variable
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How to display the given number in reverse order.Data type cannot be character array.
sarathi trichy
- Oct 25th, 2007
#include<stdio.h>#include<conio.h>void main(){int x,y,z;clrscr();printf("enter the number");scanf("%d",&x);while(x>0){y=x%10;printf("%d",y);x=x/10;}getch();}
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Main(){ char * strA; char * strB = I am OK; memcpy( strA, strB, 6);}
A) Compile errorB) I am OKC) Runtime error.D) I am OExplanation: I am OK is not within " "
mani2881
- Oct 22nd, 2007
the memcpy function will copy n bytes from the object pointed by strB into strA. If the copying takes places between objects that overlap, the behaviour will be undefined. If these to char pointer is assigned an address which don't overflow, this would work.Thanks,mani
vikas
- Apr 28th, 2006
Its the Runtime error as strA hasnt been allocated any memory
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}
change(int *b,int n)
{
int i;
for(i=0;i
}
sytaxis correct?? was asked i a test
">Output of this Programme please??main(){ int a[]={2,4,6,8,10}; int i;change(a,5);for(int i=0;i
chaitanya
- Oct 22nd, 2007
First lets get the code ryt..#include "stdio.h"void change(int *b,int n){? int i;? for(i=0;i
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How to write a sizeof function using a macro function?
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What is the difference between a string copy (strcpy) and a memory copy (memcpy)? When should each be used?
The strcpy() function is designed to work exclusively with strings. It copies each byte of the source string to the destination string and stops when the terminating null character () has been moved. On the other hand, the memcpy() function is designed to work with any type of data. Because not all data ends with a null character, you must provide the memcpy() function with the number of bytes you...
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}
">All the programs are tested under Turbo C/C++ compilers. It is assumed that, Programs run under DOS environment, The underlying machine is an x86 system, Program is compiled using Turbo C/C++ compiler.The program output may depend on the information based on this assumptions (for example sizeof(int) == 2 may be assumed). Predict the output or error(s) for the following:i) void main(){ int const * p=5; printf("%d",++(*p));}
Answer: Compiler error: Cannot modify a constant value. Explanation: p is a pointer to a "constant integer". But we tried to change the value of the "constant integer".
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Write the equivalent expression for x%8?
x&7 Write expressions to swap two integers without using a temporary variable?
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What is the output for the following code
main{int x=90;float *ptr;ptr=(float *)&x;*ptr=50.0;printf("%d",x);printf("%f",*pf);}Though the address of i & pf are same but the value which i get when i print x is a different integer value and when *pf is printed it gives the value 50.0 .why?
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When should the register modifier be used? Does it really help?
The register modifier hints to the compiler that the variable will be heavily used and should be kept in the CPU’s registers, if possible, so that it can be accessed faster. There are several restrictions on the use of the register modifier. First, the variable must be of a type that can be held in the CPU’s register. This usually means a single value of a size less than or equal to the size of an...
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Which of the following about automatic variables within a function is correct ?a.its type must be declared before using the variableb.they are localc.they are not initialised to zerod.they are global.
C
harinisathiyamurthy
- Oct 1st, 2007
AUTOMATIC VARIABLES ARE ALWAYS DECLARED WITHIN A FUNCTION.. SO THEY A LOCAL...
piyush
- Sep 25th, 2007
The answer is option B.As automatic variables are local only to the scope in which it is declared.
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What is difference between && and & similarly || and | i.e., What is difference between logical AND and bit-wise AND?
archikinu
- Sep 28th, 2007
&& , || - logical operators &,| - bit wise operatorsLogical operators are normally used for specifying conditions. Usage: condition1 && condition2, condition1 || con...
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C Interview Questions
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