Java Quiz

What is the purpose of a Java method?

• To declare variables

• To define a class

• To perform a specific task or action

• To create arrays

Which keyword is used to declare a method in Java?

• func

• method

• class

• public

In Java, which datatype is used to store multiple values of the same type?

• int

• char

• double

• array

Which of the following statements is true about Java arrays?

• Arrays can hold elements of different datatypes.

• Arrays have a fixed size that cannot be changed.

• Arrays automatically resize to accommodate new elements.

• Arrays can only hold a single element.

Which method is used to find the length of an array in Java?

• length()

• size()

• count()

• sizeof()

In Java, what is the reference datatype for a user-defined class?

• int

• double

• String

• ClassName

Which method is used to copy elements from one array to another in Java?

• copyArray()

• clone()

• copyOf()

• copyElements()

What happens when you pass an array to a method in Java?

• The method receives a copy of the original array.

• The original array is passed by reference.

• The method creates a new array with the same elements.

• Arrays cannot be passed as arguments to methods.

Which method is used to find the maximum value in an array of integers in Java?

• maxElement()

• findMax()

• getMax()

• Arrays.stream().max()

What is the primary advantage of using reference datatypes in Java?

• They consume less memory than primitive datatypes.

• They allow for more efficient arithmetic operations.

• They can represent complex, user-defined structures.

• They have faster access times in arrays.