Mastering C Language Concepts

Front

What is the correct syntax to include a header file in C?

Back

#include

Front

Explain the difference between '==' and '=' in C.

Back

'==' checks equality, while '=' assigns a value.

Front

What is a pointer in C and how is it declared?

Back

A pointer in C is a variable that stores the address of another variable. It is declared using the syntax 'type *pointer_name;'. For example, 'int *ptr;'.

Front

How do you allocate memory dynamically in C?

Back

Use 'malloc', 'calloc', or 'realloc' functions to allocate memory dynamically in C.

Front

What is the purpose of the 'main' function in a C program?

Back

The 'main' function is the entry point of a C program.

Front

Describe the use of the 'break' statement in loops.

Back

The 'break' statement is used to exit a loop prematurely.

Front

What is a structure in C and how is it defined?

Back

A structure in C is defined using the 'struct' keyword, followed by the structure name and its members.

Front

How can you pass an array to a function in C?

Back

Use a pointer to the first element of the array as the function parameter.

Front

What is the difference between 'struct' and 'union' in C?

Back

A 'struct' allocates separate memory for each member, while a 'union' shares memory among its members.

Front

Explain the concept of recursion with an example in C.

Back

Here is a C example:
int factorial(int n) {
if (n == 0) {
return 1; // Base case
} else {
return n * factorial(n - 1); // Recursive case
}
}