Methods

Question 1

compare()

Answer 1

compares two arrays

Question 2

copyOf()

Answer 2

Creates a copy of an array with a new length

Question 3

deepEquals()

Answer 3

Compares two multidimensional arrays to check whether they are deeply equal to each other

Question 4

equals()

Answer 4

Checks if two arrays are equal

Question 5

fill()

Answer 5

Fills an array with a specified value

Question 6

mismatch()

Answer 6

Returns the index position of the first mismatch/conflict between two arrays

Question 7

sort()

Answer 7

Sorts an array in ascending order

Question 8

Array List Methods

Question 9

add()

Answer 9

Add an item to the list

boolean|void

Question 10

addAll()

Answer 10

Add a collection of items to the list

boolean

Question 11

clear()

Answer 11

Remove all items from the list

void

Question 12

clone()

Answer 12

Create a copy of the ArrayList

Object

Question 13

contains()

Answer 13

Checks whether an item exist in the list

boolean

Question 14

ensureCapacity()

Answer 14

Increase the capacity of the list to be able to fit a specified number of items

void

Question 15

forEach()

Answer 15

Increase the capacity of the list to be able to fit a specified number of items

void

Question 17

forEach()

Answer 17

Perform an action on every item in the list

void

Question 18

get()

Answer 18

Return the item at a specific position in the list

T

Question 19

indexOf()

Answer 19

Return the position of the first occurrence of an item in the list

int

Question 20

isEmpty()

Answer 20

Checks whether the list is empty

boolean

Question 21

iterator()

Answer 21

Return an Iterator object for the ArrayList

Iterator

Question 22

lastIndexOf()

Answer 22

Return the position of the last occurrence of an item in the list

int

Question 23

listIterator()

Answer 23

Return a ListIterator object for the ArrayList

ListIterator

Question 24

remove()

Answer 24

Remove an item from the list

boolean|T

Question 25

removeAll()

Answer 25

Remove a collection of items from the list | boolean

Question 26

removeIf()

Answer 26

Remove all items from the list which meet a specified condition | boolean

Question 27

replaceAll()

Answer 27

Replace each item in the list with the result of an operation on that item | void

Question 28

retainAll()

Answer 28

Remove all elements from the list which do not belong to a specified collection | boolean

Question 29

set()

Answer 29

Replace an item at a specified position in the list | T

Question 30

size()

Answer 30

Return the number of items in the list | int

Question 31

sort()

Answer 31

Sort the list | void

Question 32

spliterator()

Answer 32

Return a Spliterator object for the ArrayList | Spliterator

Question 33

subList()

Answer 33

Return a sublist which provides access to a range of this list's items | List

Question 34

toArray()

Answer 34

Return an array containing the list's items | Object[]

Question 35

trimToSize()

Answer 35

Reduce the capacity of the list to match the number of items if necessary | Object[]