Java Quiz

In a method, the return type should be __________ when the method returns no value.

• Static
• Private
• Public
• Void

• A

• B

• C

• D

• E

which one this keywords are used to create a class in java

• class

• struct

• int

• none of the avove

Which type of data is used to enter the value ("Welcome")?

• Text
• Characters
• String
• Boolean

int len = "jump it!".length();

What is the value of len?

• 8

• 7

• 9

• 6

• This code does not compile.

Which statement below is the correct way to retrieve the first element in the nums ArrayList?

• nums.get(0)

• nums[0]

• nums(0)

• nums[1]

Given the ArrayList nums with the values [3, 7, 6, 0], what code below is the proper way to change the 7 to be a 5?

• nums.set(1, 5)

• nums.set(7, 5)

• nums.set(5, 2)

• nums[2] = 5

Given the nums ArrayList with the values [5, 4, 3, 2], what statement below removes the value 3 from the list?

• nums.remove(2)

• nums.remove(3)

• nums.get(2) = null

• nums.remove(1)

Java array indexes start at 0.

• True

• False

What is the index of the 12 in this array?

(a)