C Programming Quiz on Variables and Constants

What is the correct syntax to declare an integer variable?

• integer x;

• x:int;

• var x:int;

• int x;

How many bytes of memory are allocated for a float variable?

• 4 bytes

• 2 bytes

• 8 bytes

• 1 byte

Which of the following is a valid identifier?

• 1stVariable

• variable-name

• variable name

• variable_name

What is the maximum length of an identifier in C?

• 32 characters

• 64 characters

• 128 characters

• 256 characters

Which of the following is a keyword in C?

• variable

• function

• return

• identifier

What is the purpose of the 'const' keyword in C?

• To create a function

• To allocate memory

• To declare a variable

• To define a constant

Which of the following is NOT a valid constant type in C?

• Octal constant

• String constant

• Floating constant

• Hexadecimal constant

What is the output of the following code: printf("%d", 10);?

• None

• 0

• Error

• 10

Which function is used to read input from the keyboard in C?

• read

• input

• scanf

• printf

What does the format specifier '%f' represent in printf?

• String

• Integer

• Float

• Character