Answer Posted / saugat biswas

Malloc:
Malloc allocates memory but does not initialize it.
Example: char *szPtr = ( char* ) malloc( sizeof( char ) *
100 );
Here szPtr is assigned 100 bytes. But the memory is not
initialized. It contains garbage.

Calloc:
Allocates a block of memory for an array of 'n' elements,
each of them 'l' bytes long, and initializes all its bits
to zero.
Example: char *szPtr = ( char* ) calloc( 100, sizeof(
char ));
Here szPtr is assigned 100 bytes & the memory is
initialized to 0.

Should I learn c or c++ first?

568

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Why is polymorphism useful?

567

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Incase of a function declaration, what is extern means?

521

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How many standards of c++ are there?

628

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What is the most common mistake on c++ and oo projects?

523

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What do you mean by stack unwinding in c++?

732

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What is the precedence when there is a global variable and a local variable in the program with the same name?

634

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Is c or c++ more useful?

576

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Explain the auto storage classes in c++.

601

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What doescout<<(0==0) print out a) 0 b) 1 c) Compiler error: Lvalue required

575

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Where the memory to the static variables is allocated?

560

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What is name hiding in c++?

615

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Eplain extern keyword?

565

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List the features of oops in c++?

576

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What is a storage class? Mention the storage classes in c++.

595

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