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Questions and Answers
Which primitive data type in Java can store the largest range of integer values?
Which primitive data type in Java can store the largest range of integer values?
What must be appended to a decimal number to indicate that it is of type float in Java?
What must be appended to a decimal number to indicate that it is of type float in Java?
Which of the following character representations is valid in Java?
Which of the following character representations is valid in Java?
Which of these statements correctly reflects the default type of decimal numbers in Java?
Which of these statements correctly reflects the default type of decimal numbers in Java?
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How many bits does the char data type occupy in Java?
How many bits does the char data type occupy in Java?
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Study Notes
Primitive Data Types
- Primitive data types are the basic building blocks of data in Java.
- They are not objects.
Numeric Data Types
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Integer: Represents whole numbers.
- byte: Stores values from -128 to 127 (8 bits).
- short: Stores values from -32,768 to 32,767 (16 bits).
- int: Stores values from -2,147,483,648 to 2,147,483,647 (32 bits).
- long: Stores values from -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807 (64 bits).
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Floating-point: Represents decimal numbers.
- float: Stores single-precision floating-point numbers (32 bits).
- double: Stores double-precision floating-point numbers (64 bits).
Non-Numeric Data Types
- char: Stores single characters (16 bits).
- boolean: Represents true or false values.
Data Type Sizes
- byte: 8 bits
- short: 16 bits
- int: 32 bits
- long: 64 bits
- float: 32 bits
- double: 64 bits
- char: 16 bits
Decimal Number Considerations
- In Java, decimal numbers are treated as double by default.
- To represent a decimal number as a float, append the letters f or F to the number.
Initialization
- Variables can be initialized using other variables or expressions.
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Example:
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int a = 5; -
int b = a; -
int c = 4 * a;
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Description
Test your knowledge of Java's primitive data types, including numeric and non-numeric types, their sizes, and characteristics. This quiz covers everything from byte to double data types in Java. Challenge yourself to understand the fundamentals of data representation in Java programming!
