Java Quiz 2

What package does ArrayList belong to?

• A. java.io

• B. java.util

• C. java.lang

• D. java.net

What is the primary advantage of using an ArrayList over an array?

• A. Fixed size

• B. Dynamic size

• C. Faster access

• D. Less memory usage

Which method is used to add an element to an ArrayList?

• A. insert()

• B. append()

• C. add()

• D. put()

ArrayLists cannot store primitive types directly. What should be used instead?

• A. Primitive Wrappers

• B. Collections

• C. Arrays

• D. Interfaces

Which of the following is a correct way to create an ArrayList of integers?

• A. ArrayList<int> list = new ArrayList<>();

• • B. ArrayList<Integer> list = new ArrayList<>();

• C. ArrayList<Int> list = new ArrayList<>();

• D. ArrayList<int[]> list = new ArrayList<>();

How do you sort an ArrayList in Java?

• A. Collections.sort()

• B. Arrays.sort()

• C. List.sort()

• D. ArrayList.sort()

What method is used to remove an element from an ArrayList?

• A. delete()

• B. remove()

• C. erase()

• D. cut()

Which import statement is required to use ArrayList?

• A. import java.util.*;

• B. import java.arraylist.*;

• C. import java.util.ArrayList;

• D. import java.collections.ArrayList;

What does the following line of code do? ArrayList<String> list = new ArrayList<>();

• A. Creates an ArrayList that can hold strings

• B. Creates an array that can hold strings

• C. Creates an ArrayList that can hold any type of objects

• D. None of the above

What is a key characteristic of an array?

• A. Dynamic size

• B. Fixed size

• C. Can store different data types

• D. Can only store objects