Data Types and Variables Quiz

Which of the following data types is used to store a single character in C?

• float

• void

• int

• char

What is the typical size of an int data type in memory on a 32-bit system?

• 8 bytes

• 4 bytes

• 1 byte

• 2 bytes

Which keyword is used to declare a variable that can hold decimal values with single precision?

• int

• double

• char

• float

The void data type is primarily used for which of the following purposes?

• To store a memory address.

• To represent a value of zero.

• To declare a variable that can hold any data type.

• To specify that a function does not return a value.

What is the primary difference in use between the float and double data types?

• A double provides more precision than a float.

• A float is a signed type, while a double is an unsigned type.

• A double requires less memory than a float.

• A float can store larger numbers than a double.

If a char variable is declared as unsigned char, what is the approximate range of values it can hold?

• 0 to 255

• -128 to 127

• -32768 to 32767

• 0 to 65535

What will happen if you try to assign the value 3.14 to an int variable in C?

• A compiler error will occur because of the data type mismatch.

• The variable will store the value 3.14 without any changes.

• The variable will store the value 3 and the value will be rounded up to 4.

• The variable will store the value 3 and the fractional part will be truncated.

Which of the following is an invalid use of the void data type?

• Using it as a function parameter to indicate that the function takes no arguments, like int func(void);.

• Using it to declare a pointer of an unknown type, like void *ptr;.

• Declaring a regular variable, like void myVar;.

• Using it as the return type for a function that does not return a value.

What is the result of the expression 1 / 2 in C, where both operands are of type int?

• 0.5

• A runtime error because of division by a smaller number.

• 0

• 1

What is the primary purpose of a variable in C?

• To serve as a placeholder for a function's return value.

• To reserve a space in memory to hold data that can change during program execution.

• To store a constant value that cannot be changed.

• To act as a label for a specific line of code.