C programming multiple definition of

Dear readers, these C programming multiple definition of Programming Interview Questions have been designed specially to get you acquainted with the nature of questions you may encounter during your interview for the subject of C Programming. What is a pointer on pointer?

It’s a pointer variable which can hold the address of another pointer variable. It de-refers twice to point to the data held by the designated pointer variable. By default calloc fills the allocated memory with 0’s. A global variable can’t be an automatic variable. What are the valid places for the keyword break to appear. Break can appear only with in the looping control and switch statement. The purpose of the break is to bring the control out from the said blocks.

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Explain the syntax for for loop. When control reaches for expression-1 is executed first. How a negative integer is stored. Get the two’s compliment of the same positive integer. A static local variables retains its value between the function call and the default value is 0.

The following function will print 1 2 3 if called thrice. If a global variable is static then its visibility is limited to the same source code. A pointer pointing to nothing is called so. What is the purpose of extern storage specifier? Used to resolve the scope of global symbol.