Quiz on Keyword, Constants and Variable

What is a keyword in the C programming language?

• A keyword in C is a reserved word with a predefined meaning.

• A keyword in C is a comment in the code.

• A keyword in C is a variable name.

• A keyword in C is a user-defined function.

How many keywords are there in C?

• 24

• 16

• 32

• 40

Can keywords in C be used as variable names? Why or why not?

• Keywords can be redefined as variable names in C.

• Yes, keywords can be used as variable names if they are not reserved.

• No, keywords in C cannot be used as variable names.

• Keywords can be used as variable names in certain contexts.

What is the significance of the 'void' keyword in C?

• The 'void' keyword indicates a function returns a pointer.

• The 'void' keyword signifies that a function does not return a value.

• The 'void' keyword is used to declare a variable of any type.

• The 'void' keyword is a data type that can hold values.

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

• The 'const' keyword defines constant variables that cannot be modified after their initial assignment.

• The 'const' keyword is a data type that represents a variable with a fixed size.

• The 'const' keyword is used to declare functions that cannot be called.

• The 'const' keyword allows variables to be modified at any time.

How does the 'sizeof' keyword work in C?

• 'sizeof' is used to declare new data types in C.

• 'sizeof' returns the size in bytes of a data type or variable.

• 'sizeof' can only be used with integer data types.

• 'sizeof' calculates the total number of variables in a program.

Which of the following is not a valid variable name declaration?

• int a3;

• int 3a;

• int _A3;

• int a_3

All keywords in C are in ____________

• Lowercase

• Uppercase

• Camelcase

• None of these

Which is variable declaration?

• int a,b;

• c=a+b;

• printf("%d%d",a,b)

• scanf("%d%d",&a,&b);

Which is valid C variable declarations?

• int my_num = 100,000;

• int my_num = 100000;

• int my num = 1000;

• int $my_num = 10000;