C interview questions with answers

C Interview Questions Part 18

noreply@blogger.com (Siva kumar.T.A) — Fri, 27 Jan 2012 09:45:54 PST

C interview question:What is the difference between ordinary variable and pointer in C? Answer: An ordinary variable is like a container it can hold any value and we can change the value of ordinary...

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C Interview Questions Part 17

noreply@blogger.com (Siva kumar.T.A) — Fri, 26 Aug 2011 11:15:39 PDT

C interview question:What is the difference between "calloc(...)" and "malloc(...)"? Answer:1. calloc(...) allocates a block of memory for an array of elements of a certain size. By default the...

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C Interview Questions Part 16

noreply@blogger.com (Siva kumar.T.A) — Sat, 09 Jul 2011 08:24:37 PDT

C interview question: What is C language? Answer: The C programming language is a standardized programming language developed in the early 1970s by Ken Thompson and Dennis Ritchie for use on the...

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C Interview Questions Part 15

noreply@blogger.com (Siva kumar.T.A) — Sun, 05 Dec 2010 10:51:42 PST

C interview question:How do I write code to get the current drive as well as set the current drive?Answer: The function getdisk( ) returns the drive number of current drive. The drive number 0...

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C Interview Questions Part 14

noreply@blogger.com (Siva kumar.T.A) — Sun, 05 Dec 2010 10:42:44 PST

C interview question:When we open a file, how does functions like fread( )/fwrite( ), etc. get to know from where to read or to write the data?Answer: When we open a file for read/write operation...

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C Interview Questions Part 13

noreply@blogger.com (Siva kumar.T.A) — Sun, 05 Dec 2010 10:40:15 PST

C interview question:How do I determine amount of memory currently available for allocating?Answer: We can use function coreleft( ) to get the amount of memory available for allocation. However,...

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C Interview Questions Part 12

noreply@blogger.com (Siva kumar.T.A) — Sun, 05 Dec 2010 10:33:54 PST

C interview question:Can we get the mantissa and exponent form of a given number?Answer:The function frexp( ) splits the given number into a mantissa and exponent form. The function takes two...

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C Interview Questions Part 11

noreply@blogger.com (Siva kumar.T.A) — Sun, 05 Dec 2010 10:32:17 PST

C interview question:How can I find the day of the week of a given date?Answer: The following code snippet shows how to get the day of week from the given date.dayofweek ( int yy, int mm, int dd...

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C Interview Questions Part 10

noreply@blogger.com (Siva kumar.T.A) — Sun, 05 Dec 2010 10:30:11 PST

C interview question:How do I write code that executes certain function only at program termination?Answer: Use atexit( ) function as shown in following program.#includemain( ){int ch ;void fun (...

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C Interview Questions Part 9

noreply@blogger.com (Siva kumar.T.A) — Sun, 05 Dec 2010 10:31:03 PST

C interview question: What is a stack ?Answer: The stack is a region of memory within which our programs temporarily store data as they execute. For example, when a program passes parameters to...

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C Interview Questions Part 8

noreply@blogger.com (Siva kumar.T.A) — Sun, 05 Dec 2010 10:33:58 PST

C interview question:If we have declared an array as global in one file and we are using it in another file then why doesn't the sizeof operator works on an extern array?Answer: An extern array is of...

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C Interview Questions Part 7

noreply@blogger.com (Siva kumar.T.A) — Sun, 05 Dec 2010 10:35:20 PST

C interview question:What is atexit() ?Answer:Function atexit( ) recevies parameter as the address of function of the type void fun ( void ). The function whose address is passed to atexit( ) gets...

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C Interview Questions Part 6

noreply@blogger.com (Siva kumar.T.A) — Sun, 05 Dec 2010 10:39:32 PST

C interview question:The sizeof( ) function doesn’t return the size of the block of memory pointed to by a pointer. Why?Answer:The sizeof( ) operator does not know that malloc( ) has been used to...

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C Interview Questions Part 5

noreply@blogger.com (Siva kumar.T.A) — Sun, 05 Dec 2010 10:41:15 PST

C interview question:Explain the functions memcmp( ) and memicmp( )Answer:The functions memcmp( ) and memicmp( ) compares first n bytes of given two blocks of memory or strings.However, memcmp( )...

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C Interview Questions Part 4

noreply@blogger.com (Siva kumar.T.A) — Sun, 05 Dec 2010 10:42:12 PST

C interview questions:Are the following two statements identical?char str[6] = "Kicit" ;char *str = "Kicit" ;Answer: No! Arrays are not pointers. An array is a single, pre-allocated chunk of...

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C Interview Questions Part 3

noreply@blogger.com (Siva kumar.T.A) — Sun, 05 Dec 2010 10:45:06 PST

C interview question:The Spawnl( ) function... Answer:DOS is a single tasking operating system, thus only one program runs at a time. The Spawnl( ) function provides us with the capability of...

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C Interview Questions Part 2

noreply@blogger.com (Siva kumar.T.A) — Sun, 05 Dec 2010 10:57:13 PST

C interview question:What will be the output of the following code?void main (){ int i = 0 , a[3] ;a[i] = i++;printf (“%d",a[i]) ;}Answer: The output for the above code would be a garbage value. In...

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C Interview Questions Part 1

noreply@blogger.com (Siva kumar.T.A) — Sun, 05 Dec 2010 10:59:30 PST

C interview question: In printf() Function- What is the difference between "printf(...)" and "sprintf(...)"? Answer: sprintf(...) writes data to the character array whereas printf(...) writes data...

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