Question

Question 1

To a client, an array and an ArrayList are the same type of object.

True

False

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Question 2

In what package is ArrayList found?

java.lang

java.util

java.awt

java.io

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Question 3

In an ArrayList, what does the size() method tell a client?

How many objects are in the ArrayList

How much space is left to hold objects in the ArrayList

The maximum capacity of the ArrayList

The number of times the add() method has been called

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Question 4

How many add() methods are in the ArrayList class?

0

1

2

3

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Question 5

Both

add(int, E) 

set(int, E) 

methods put an object into an ArrayList. How do they differ?

The set() method replaces data; the add() method inserts data

The add() method replaces data; the set() method inserts() data

Both set() and add() insert the data

Both set() and add() replace data

Answer 1

Q1: False; Array are fixed length size, whereas ArrayList are resizable

Q2: java.util

Q3: size() returns the how many objects are in the ArrayList

Q4: There are two add() methods in the ArrayList class

Q5: set() methods replaces the element at a particular index, whereas add() inserts an element in that index, the elements are shifted, so correct answer The set() method replaces data; the add() method inserts data