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Big Endian Little Endian
How will you find if a machine is a big endian or little endian?
mohamr2
- Sep 20th, 2010
The usual techniques are to use a pointer: int x = 1; if(*(char *)&x == 1) printf("little-endiann"); else printf("big-endiann"); or a union: union { int i; ...
poojarinke
- Aug 13th, 2010
Some machines store, for example, a two-byte integer with the least significant byte first, followed by the most significant byte. These machines are called little endian machines. Other machines sto...
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Pointer Use
Why do we use pointer instead of variable?
jbode
- Sep 30th, 2010
We *must* use pointers for the following:1. To fake pass-by-reference semantics;2. To track dynamically allocated memory;3. To build self-referential data structures.If we want a function to modify...
Cmkraj
- Sep 15th, 2010
List of pros & cons of pointers over variables1. Fetching speed is faster thru pointers as pointers directly access the memory2. Useful in the concepts of pass by reference. variable value can be chan...
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Read the function conv() given belowconv(int t){int u;u=5/9 * (t-32);return(u0;}What a.15b.0c.16.1d.29
A
avula chiru
- Sep 30th, 2010
The output is zero because u is declared as a int type when we devide the 5 with 9 the result is 0 and multiply it with t-32, the total result is zero.There fore the option is b.
A.R
- May 13th, 2007
The ans would be 0. 5/9 returns 0 becos both 5 & 9 are integers.
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What is the difference between constant qualifier and volatile qualifier?
amritshukla
- Sep 24th, 2010
There is no easy way to make a direct comparison between volatile and const, although I suppose in some sense they are exact opposites. Modifying a variable definition with const means that the compil...
kamal7725
- Nov 29th, 2007
A volatile variable is nothing but a local variable which gets destroyed as soon as its scope reachs to end.we use the constant qualifier to make the value unchangable. This value could be volatile.
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Recursion
What is the basic principle behind recursion, other than function calling itself again & again and in which real time scenario we use it?
jbode
- Oct 4th, 2010
The basic idea behind recursion is that you're solving one big problem by breaking it into multiple smaller, easier-to-solve problems. This can make the algorithm easier to write and un...
anandkumarjha
- Aug 29th, 2010
Recursion is the process of calling function again and again.During the recursion many push and pop operation is done in our registers memory. That's why recursion has very poor performance.Our compu...
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Pointer to an Array
What is pointer to an array? Explain with example.
jbode
- Oct 5th, 2010
For any given data type T, a pointer to an array of T is declared as "T (*arr)[N];". It has the same value as a pointer to the first element of the array, but a different type (T (*)[N...
anandkumarjha
- Aug 28th, 2010
Actually there does not exist array rather here is a term called pointer to an array.let me explain with the help of one example.suppose we have following code#include<stdio.h>#define i 10main()...
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Pointer Variable
How to declare and initialize a pointer variable?
jbode
- Oct 6th, 2010
Argh, hit "Submit" before I was finished.For an array a of type T, the expression "&a" yields a pointer to an array of T:int a[5] = {1,2,3,4,5};int (*pa)[5] = &a;
jbode
- Oct 6th, 2010
For any type T:T *p; // declares p as a pointer to TT *ap[N]; // declares ap as an N-element array of pointer to TT (*pa)[...
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Accenture C Interview Questions
Study the Following Points:a.One Cannot Take the address of a Bit Fieldb.bit fields cannot be arrayedc.Bit-Fields are machine Dependantd.Bit-fields cannot be declared as staticWhich of the Following Statements are true w.r.t Bit-FieldsA)a,b&c B)Only a & b C)Only c D)All2.What is the function of ceil(X) defined in math.h do?A)It returns the value rounded down to the next lower...
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Why C does not support nested functions?
17shraddha
- Nov 1st, 2010
C does not support nested function try this code void adds(){?? ? printf("Adds start");???? void subbs()???? {???? printf("subbs start");???? }???? printf("adds end");}void main(){?? adds();?? subs();//Will generate an error prototype required}
uharish38
- Jul 8th, 2009
In C every funciton is independant from other.And there is a clear difference from function definition and function invocation.In C the only way to Invoke a function is to call a function.
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Write permutation series i.e ABC, BCA, ACB, CAB, CBA...
dharmendraverma
- Nov 2nd, 2010
#include<stdio.h>void permute(int n, int size, char array[]){ char tmp; int i, j; if (n == 1) { for (i = 0; i < size; i...
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}">
What is the output of following program?#includevoid main(){printf("%d%d",sizeof(NULL),sizeof(" "));}
sharma.rohit
- Nov 11th, 2010
#include expects and in main function..return type of main function must be "int"
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Convert int to string
Convert int to string without using itoa in C language
jbode
- Sep 20th, 2011
Oh for Pete's sake, what's the point of having an "insert code" option if it munges the code beyond all recognition? Seriously, for a site geared towards programming questions, the support for actually *posting code* is pretty poor.
jbode
- Sep 19th, 2011
Use sprintf. ALternately, you could do something like this (probably not the most efficient approach, but fairly straightforward: "c #define MAXDIGITS ... // maximum number of ...
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Count Negative Elements
A list of number is given. Make a program which counts the no of negative elements using array inc.
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Accenture C Questions
1)Write a C program to find a peculiar two digit number which is three times the sum of its digits.2) Bacteria are known to multiply very rapidly. If a certain container contains just one bacterium on the first day and there are twice as many on the next day. In this manner the number of bacteria in the container doubles itself everyday. Assuming that the container would be full on the 10th day with...
krischan
- Nov 23rd, 2010
1)Write a C program to find a peculiar two digit number which is three times the sum of its digits.#include<stdio.h>void main(){int i=0,x,y;clrscr();for(i=10;i<=99;i++){x=i/10;y=i%10;if(i==(x...
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C question
How can you change the value of a constant variable in C?
jbode
- Nov 30th, 2010
mrinal671987: I should have checked the language standard before posting that code. Per section 6.7.3, paragraph 5, "[i]f an attempt is made to modify an object with a const-qualified type ...
mrinal671987
- Oct 29th, 2010
Jbode: You are right, but this program I have also tried and it works on gcc compiler but it gives same value in Turbo C
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Pointers
Why do we need different types of pointers when it occupies the same memory space for any type of pointers?
supriti.dan
- Nov 30th, 2010
Pointer is a special kind of variable which can hold the address of other variable. As the address of any variable is a integer that's why pointer variable itself is always of integer type but in ...
mohamr2
- Sep 20th, 2010
Its not that we require different pointer, actually pointer are of the same size depending on the target platform that the memory belongs to. It is the pointer type that matters, we require an in...
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10e05A. intB. charC. stringD. float
arvind
- Oct 6th, 2006
Float
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What is the difference between "C structure" and "C++ structure".
prititripathi
- Dec 17th, 2010
C++ also support structure bt with more additional features making it suitable for oop dat feature is class. like in c++ enum defined within class/structure is local to dat class while in c it is globally visible
tanuja
- Nov 30th, 2010
C structure::: 1) //single line comment about the programme. 2) headerfiles 3) macros, typedef... 4) global declarations 5) main() 6) statements C++ Structure::: 1) /*multi line comments*/ ...
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Point out the error, if any, in the following program main() { int a=10,b; a>= 5 ? b=100 : b=200; printf("n%d",b); }
lvalue required in function main(). The second assignment should be written in parenthesis as follows:
a>= 5 ? b=100 : (b=200);
boxofyuvi
- Dec 18th, 2010
It will print 100as the conditional operator is true,it will give the above result
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Open Files
How will you increase the allowable number of simultaneously open files?
C Interview Questions
Ans