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Variables and Data Types in Java

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Questions and Answers

What is the purpose of a variable in programming?

To format text and numbers

To store and manage data values (correct)

To control the flow of the program

To execute conditional statements

Which variable type is suitable for storing integers without decimals?

char

float

bool

int (correct)

How do you create a variable in Java?

Use the 'var' keyword followed by the variable name and value

Specify the type, followed by the variable name and assign it a value using the = sign (correct)

Specify the type, followed by the keyword 'create', then the variable name and value

Use the 'new' keyword followed by the variable type and value

What happens when you assign a new value to an existing variable?

It overwrites the previous value of the variable Signup and view all the answers

Which variable type is used to store single characters in Java?

char Signup and view all the answers

What is the purpose of the 'bool' variable type in Java?

To store values with two states: true or false Signup and view all the answers

Which characters are allowed in variable names in C#?

Letters, digits, underscores, and dollar signs Signup and view all the answers

What does the 'final' keyword signify in C#?

Unchangeable and read-only Signup and view all the answers

How can multiple variables of the same type be declared in C#?

Using a comma-separated list Signup and view all the answers

Which method is often used to display variable values to the console window in C#?

WriteLine() Signup and view all the answers

What is the purpose of the 'var' keyword in C#?

To declare method level variables without specifying a data type explicitly Signup and view all the answers

What is an identifier in C#?

A name used to identify a class, variable, function, or namespace Signup and view all the answers

Which characters can a legal identifier in C# start with?

Letter, underscore, or dollar sign Signup and view all the answers