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IT-OOPRGO21 PRELIM

Authored by Wendell Cabalhin

Computers

University

Used 1+ times

IT-OOPRGO21 PRELIM
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35 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What are the basic operations that can be performed on a two-dimensional array?

Converting to strings

Creating three-dimensional arrays

Sorting elements

Accessing elements, modifying elements, traversing, adding/removing rows and columns, and performing mathematical operations.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How do you declare and initialize a two-dimensional array in Java?

int[3,4] array = new int[][];

int array = new int[3][4];

int array[][] = new int[4][3];

int[][] array = new int[3][4]; // Declaration and initialization

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the Array class in Java and what are its main features?

The Array class in Java provides utility methods for array manipulation, including sorting, searching, and filling, but cannot be instantiated.

The Array class can be instantiated like other classes in Java.

The Array class only provides methods for array creation.

The Array class is used for managing collections of objects in Java.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

List some common methods provided by the Array class in Java.

split

copyOf, copyOfRange, fill, sort, equals

reverse

merge

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is an ArrayList and how does it differ from a regular array?

An ArrayList can only store primitive data types.

A regular array can change its size dynamically.

An ArrayList is a dynamic array that can resize itself, while a regular array has a fixed size.

An ArrayList is a type of linked list.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Describe the process of adding an element to an ArrayList in Java.

arrayList.addItem(element);

arrayList.insert(element);

Use arrayList.add(element);

arrayList.push(element);

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What are some key methods of the ArrayList class?

add(), remove(), get(), size(), clear()

update()

insert()

find()

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