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Java Variables and Declaration Quiz

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Questions and Answers

What are the three properties of a variable in Java?

Identifier, memory size, value
Value, memory location, identifier
Memory location, type of data, value (correct)
Name, value, type

Which data type is used to store whole numbers in Java?

short
long
double
int (correct)

What is the result of the expression: $300 imes 30$?

9000 (correct)
90000
9030
9300

What is the purpose of a method in Java?

To perform a specific task (C) Signup and view all the answers

What is the numeric data type used to store decimal numbers in Java?

double (B) Signup and view all the answers

What are the two components of a variable declaration in Java?

Identifier and type of data (B) Signup and view all the answers

Which part of a method defines the access type of the method?

Modifiers (A) Signup and view all the answers

What is the purpose of the returnValueType in a method?

To specify the data type of the value the method returns (D) Signup and view all the answers

Which keyword is used when a method performs operations without returning a value?

void (B) Signup and view all the answers

What is the purpose of a parameter in a method?

To pass a value to the method when it is invoked (B) Signup and view all the answers

In Java, how are comments specified for a single-line and multi-line?

// and /* */ (A) Signup and view all the answers

What defines an identifier in Java?

It cannot be true, false, or null (A) Signup and view all the answers

How can a method be called from another class in Java?

Using a public static declaration (A) Signup and view all the answers

What does the static modifier do to a variable in Java?

Makes the variable available without creating an object of the class (A) Signup and view all the answers

What is the purpose of declaring constants in ALL CAPS in Java?

To differentiate constants from other variables visually (D) Signup and view all the answers

What is the purpose of the final modifier for a variable in Java?

To cause the variable to be unchangeable. (A) Signup and view all the answers

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