Core Java Concepts Quiz (1)

Which of the following is a primitive data type in Java?

• String

• class

• int

• Object

Which data type is used to store true or false values?

• char

• boolean

• double

• byte

What is the purpose of declaring a variable in Java?

• To define a class.

• To allocate memory to store data.

• To create a new method.

• To print output to the console.

Which operator is used for equality comparison in Java?

• =

• ==

• !=

• >

What is the result of the expression 5 % 2?

• 2.5

• 1

• 0

• 7

Which of the following is a logical AND operator in Java?

• |

• &

• ||

• &&

Which keyword is used to start an if statement in Java?

• when

• if

• condition

• check

Which loop in Java guarantees that the code block will execute at least once?

• for loop

• while loop

• do-while loop

• if-else statement

What is the purpose of the break statement within a loop?

• To skip the current iteration and continue to the next.

• To terminate the loop immediately.

• To execute the loop in reverse order.

• To define the loop's condition.

How do you declare an array of integers named numbers that can hold 5 elements?

• int numbers = new array[5];

• array numbers = new int(5);

• int[] numbers = new int[5];

• int numbers[5] = new int[];