Java Data Types Quiz

Primitive Data Types in Java

• Java has eight primitive data types: byte, short, int, long, float, double, char, and boolean.
• Primitive data types hold their values directly, as opposed to reference types which refer to objects.

Long Data Type

• The 'long' data type represents a 64-bit signed integer, used for storing large whole numbers.

Unicode Characters

• The data type used to represent 16-bit Unicode characters in Java is 'char'.

Reference Data Types

• Reference data types in Java include arrays, classes, and interfaces, as opposed to primitive types that store values directly.

Float Data Type

• The 'float' data type represents a single-precision 32-bit IEEE 754 floating point, used for decimal numbers with single precision.

32-bit Signed Integers

• The 'int' data type in Java represents 32-bit signed integers, suitable for a wide range of numeric values.

16-bit Unicode Representation

• The 'char' data type is specifically used for representing 16-bit Unicode characters in Java.

8-bit Signed Integers

• The 'byte' data type represents 8-bit signed integers, typically used for saving memory in large arrays.

Double Data Type

• The 'double' data type represents a double-precision 64-bit IEEE 754 floating point, utilized for large decimal values with higher precision.

Non-Primitive Data Type

• Any object or class in Java, such as Strings, is not considered a primitive data type; it is a reference type instead.