Java Data Types Quiz
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Questions and Answers

Which of the following is a primitive data type in Java?

  • Character (correct)
  • Integer
  • String
  • Boolean

    • What does the 'long' data type represent in Java?

  • 32-bit signed integer
  • Single-precision 32-bit floating-point number
  • 64-bit signed integer (correct)
  • Double-precision 64-bit floating-point number

    • Which data type is used to represent 16-bit Unicode characters in Java?

  • char (correct)
  • float
  • int
  • double

    • Which of the following is a reference data type in Java?

    <p>String</p> Signup and view all the answers

    What type of data does the 'float' data type represent in Java?

    <p>Single-precision 32-bit floating-point number</p> Signup and view all the answers

    Which of the following represents 32-bit signed integers in Java?

    <p>int</p> Signup and view all the answers

    Which data type in Java represents 16-bit Unicode characters?

    <p>char</p> Signup and view all the answers

    Which of the following represents 8-bit signed integers in Java?

    <p>byte</p> Signup and view all the answers

    What does the 'double' data type represent in Java?

    <p>double-precision 64-bit floating-point numbers</p> Signup and view all the answers

    Which of the following is not a primitive data type in Java?

    <p>String</p> Signup and view all the answers

    Study Notes

    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.

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    Quiz Team

    Description

    Test your knowledge of Java data types with this quiz. Explore the main types of data in Java and enhance your understanding of primitive and non-primitive data types.

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