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Java Programming: Variables Concepts

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Questions and Answers

What is the purpose of initializing variables in Java?

To prevent variable assignment errors

To increase the memory allocated for variables

To keep the compiler happy

To assign a value to variables at the time of declaration (correct)

In Java, what is the correct syntax for initializing a variable of type String?

String objectName = 'string';

String objectName= "string"; (correct)

String objectName = String: 'string';

String objectName = new String('string');

Which symbol is referred to as the assignment operator in Java?

= (correct)

What determines the kind of values a variable can hold in Java?

Variable's type Signup and view all the answers

Why is it important to choose a meaningful variable name in Java?

To comply with naming conventions Signup and view all the answers

What does a variable need before it can be used in Java?

Declaration Signup and view all the answers

In Java, what is the correct syntax for assignment statements?

variable = value; Signup and view all the answers

Which of the following is a valid assignment statement in Java?

total = sum + 2 * count; Signup and view all the answers

What is the purpose of a memory diagram in Java programs?

To show the state of variables and their values at a specific point in the program Signup and view all the answers

When declaring variables in Java, what does 'int b = a;' indicate?

'b' is assigned the same value as 'a' Signup and view all the answers