Java Control Structures Quiz

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Questions and Answers

What is the purpose of the 'if' statement in Java?

  • Performs an action if a condition is true and skips it if false (correct)
  • Performs an action if a condition is false and skips it if true
  • Performs an action only if a condition is false
  • Performs an action without any condition

Which control structure in Java performs one of several actions based on the value of an expression?

  • if statement
  • while statement
  • do...while statement
  • switch statement (correct)

In Java, what does the 'while' statement do?

  • Performs an action only if a condition is false
  • Performs one of several actions based on the value of an expression
  • Performs the action(s) in its body one or more times (correct)
  • Selects or ignores a single action based on a condition

What is the characteristic of the 'do...while' statement in Java?

<p>Performs the action(s) in its body one or more times (D)</p> Signup and view all the answers

What is the purpose of the 'if...else' statement in Java?

<p>Performs an action when the condition is true and a different action when the condition is false (B)</p> Signup and view all the answers

Java's switch statement always evaluates all the cases before executing the corresponding block of code.

<p>False (B)</p> Signup and view all the answers

The 'for' statement in Java can only perform actions a specific number of times.

<p>False (B)</p> Signup and view all the answers

The 'do...while' statement in Java always executes its body at least once.

<p>True (A)</p> Signup and view all the answers

The 'if' statement in Java can only perform a single action.

<p>True (A)</p> Signup and view all the answers

The 'else' keyword is used alone without the 'if' statement in Java.

<p>False (B)</p> Signup and view all the answers

Java's switch statement is a _______-selection statement

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

Java's for statement performs the action(s) in its bodies _______ or more times

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

The _______ statement in Java performs the action(s) in its body one or more times

<p>do…while</p> Signup and view all the answers

Java's if…else statement is a _______-selection statement

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

The 'while' and 'for' in Java are _______

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

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