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Java Control Structures and Sample Program

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Java Control Structures and Sample Program

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Questions and Answers

What is the purpose of the 'if-else' structure in programming?

To iterate through a set of statements

To execute a statement regardless of the condition

To execute a statement only if a specified condition is false

To execute a statement only if a specified condition is true (correct)

Which control structure in programming is used to perform different actions based on different conditions?

Iteration

Switch

Selection (correct)

Sequence

In the given sample program 1, what will be the output if the 'number' entered is 0?

No output will be displayed

0 is a negative value (correct)

0 is a positive value

Number entered is zero

What would be the output of the given alternative to sample program 2 if 'number' is 5?

No output will be displayed Signup and view all the answers

What does the 'else if' structure allow in programming?

To check for additional conditions when the preceding condition is false Signup and view all the answers

What is the purpose of the 'Switch' control structure in programming?

To perform different actions based on different cases or values Signup and view all the answers

What will happen if no condition is true in a series of else-if statements?

The last else statement will be executed Signup and view all the answers

In the context of multiple else-if statements, what does the final else serve as?

A default condition Signup and view all the answers

In the given Java code, what will be the grade if the exam mark is 75?

A Signup and view all the answers

What do logical operators allow in a conditional statement?

They allow more than one criteria in a conditional statement Signup and view all the answers

In Java, what would be the result of the following logical operation: true && false?

false Signup and view all the answers

In Java, what happens when an expression with the || operator has both conditions as false?

The message will not be printed on screen Signup and view all the answers

What are the operands of logical operators in Java?

Expressions that evaluate to TRUE or FALSE Signup and view all the answers

In Java, what is evaluated first when Java sees a && operator or a || operator?

Left side of the operator Signup and view all the answers

If num1 is -2 and num2 is 4, what will be the result of this expression: num1 > 0 && num2 < 0?

False Signup and view all the answers

What are logical operators commonly used for in Java?

To combine multiple conditions in conditional statements Signup and view all the answers