Explain what does the characters 'r' and 'w' mean when writing programs that will make use of files?

1310

Give a one-line C expression to test whether a number is a power of 2. [No loops allowed - it's a simple test.]

1131

For what purpose null pointer used?

1115

Explain what does it mean when a pointer is used in an if statement?

1105

how do you write a function that takes a variable number of arguments? What is the prototype of printf () function?

1981

How do I create a directory? How do I remove a directory (and its contents)?

1220

Explain the difference between structs and unions in c?

1066

What is the difference between procedural and declarative language?

1187

What is the use of static variable in c?

1142

Can a pointer point to null?

1117

How can I write a function that takes a format string and a variable number of arguments?

1098

What is header file definition?

1137

Are there constructors in c?

1060

What is the use of a conditional inclusion statement in C?

1107

What is the difference between a function and a method in c?

1131