C Programming Basics

What is the syntax for declaring a variable in C?

• int num;

• string name;

• bool flag;

• float value;

How do you print 'Hello, World!' in C?

• printf('Hello, World!');

• print('Hello, World!');

• System.out.println('Hello, World!');

• cout << 'Hello, World!';

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

• The 'main' function in C is responsible for printing output

• The 'main' function in C is used for defining custom functions

• The 'main' function in C is the entry point for the program.

• The 'main' function in C is used for declaring variables

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

• '==' is used for subtraction

• '=' is used for comparison

• '==' is used for loop iteration

• '==' is the equality operator, and '=' is the assignment operator.

What is the 'printf' function used for in C?

• It is used to print formatted output to the standard output.

• It is used to create graphical user interfaces.

• It is used to perform mathematical calculations.

• It is used to read user input from the keyboard.

How do you comment a single line in C?

• ## This is a comment

• /* This is a comment */

• /* This is not a comment

• // This is a comment

What is the 'scanf' function used for in C?

• It is used for performing mathematical calculations

• It is used for writing output to a file

• It is used for reading input from the standard input stream based on the specified format.

• It is used for creating graphical user interfaces

What is the difference between 'int' and 'float' data types in C?

• The 'int' data type is for decimal numbers, and the 'float' data type is for whole numbers.

• The 'int' data type is for characters, and the 'float' data type is for strings.

• The 'int' data type is for integers, and the 'float' data type is for floating-point numbers.

• The 'int' data type is for floating-point numbers, and the 'float' data type is for integers.

Explain the difference between '&&' and '||' in C.

• '&&' is the logical OR operator

• '||' is the logical AND operator

• '&&' is the logical AND operator

• '||' is the logical OR operator

What is the syntax for a 'switch' statement in C?

• switch(expression) { case constant: statements; break; default: statements; }

• if(condition) { statements; }

• for(initialization; condition; update) { statements; }

• while(condition) { statements; }