Mastering C Programming Concepts

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

• #include or #include "header.h"

• #header

• #include {header.h}

• import header.h

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

• '==' is used to declare variables while '=' is for comparison.

• The difference is that '=' is for assignment and '==' is for comparison.

• Both '=' and '==' are used for assignment.

• '==' is for assignment and '=' is for comparison.

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

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

• A pointer in C is a variable that stores a string.

• A pointer in C is a type of function that returns a variable.

• A pointer in C is declared using 'pointerName *type;'.

How do you allocate memory dynamically in C?

• Use 'malloc', 'calloc', or 'realloc' functions.

• Use 'new' operator for memory allocation.

• Use 'free' to allocate memory.

• Use 'printf' to allocate memory.

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

• The 'main' function is where all the functions are declared.

• The 'main' function is used for defining global variables.

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

• The 'main' function handles memory allocation in a C program.

Describe the use of 'printf' and 'scanf' functions.

• 'printf' formats input data, while 'scanf' displays output.

• 'printf' and 'scanf' are both used for file operations.

• 'printf' is used for reading input, while 'scanf' outputs text.

• 'printf' outputs formatted text, while 'scanf' reads formatted input.

What are the different storage classes in C?

• dynamic

• auto, register, static, extern

• shared

• local

How do you define a structure in C?

• StructName struct { dataType member1; dataType member2; };

• struct StructName { member1, member2; };

• struct StructName { dataType member1; dataType member2; ... };

• struct { member1: dataType; member2: dataType; } StructName;

What is the significance of the 'return' statement?

• The 'return' statement is used to declare a variable.

• The 'return' statement pauses the function's execution.

• The 'return' statement is only used in loops.

• The 'return' statement signifies the end of a function's execution and provides a value to the function caller.

Explain the concept of recursion with an example.

• Recursion is a method where a function calls itself to solve smaller instances of the same problem.

• Recursion is a method where a function runs in parallel to solve problems.

• Recursion is a technique that involves using loops to repeat a function.

• Recursion is when a function is executed only once without any repetition.