ICS3U (Grade 11) COmputer Science EXAM REVIEW

Question 1

What is the output of system.out.println(3 + 4 +"Hello" + 5 + 6); ?

Accepted Answer

7Hello56

Question 2

What does the System.out.println() method do?

Accepted Answer

Prints output to the console

Question 3

What is the difference between == and .equals() in Java?

Accepted Answer

==compares references, .equals() compares references

Question 4

What is the result of calling list.get(0) on an empty ArrayList?

Accepted Answer

indexOutOfBoundsException

Question 5

What is the purpose of return in Java?

Accepted Answer

End a method and returns a value

Question 6

How do you take user input using Scanner in Java?

Accepted Answer

Scanner input = new Scanner(System.in);

Question 7

What is the correct syntax to declare an integer variable in Java?

Accepted Answer

int num = 5;

Question 8

Which of the following statements will correctly print the length of a string variable str?

Accepted Answer

System.out.println(str.length() ) ;

Question 9

What is the purpose of a constructor?

Accepted Answer

To initialize object fields

Question 10

What will Math.sqrt(16) return?

Accepted Answer

4

Question 11

What is the correct way to declare a double variable in Java?

Accepted Answer

double price = 19.99;

Question 12

What is the following code output?

Accepted Answer

Even

Question 13

What is inheritance used for?

Accepted Answer

To reduce code duplication

Question 14

What does a unit test typically check?

Accepted Answer

Whether a single method or function produces the expected result

Question 15

Which Java Keyword prevents inheritance?

Accepted Answer

final

Question 16

What will be the output of the following code snippet?

Accepted Answer

2

Question 17

Which term describes a method in a subclass that replaces a method in the superclass?

Accepted Answer

Overriding

Question 18

What does the following statement do?

Accepted Answer

Creates an object for taking user input

Question 19

Which of the following is NOT an example of an output device?

Accepted Answer

Mouse

Question 20

What keyword is used to exit a loop prematurely?

Accepted Answer

break

Question 21

What does the term "booting" refer to in computer science?

Accepted Answer

Starting up the computer

Question 22

What will the following code output?

Accepted Answer

e

Question 23

Which operator is used for logical AND in Java?

Accepted Answer

&&

Question 24

What is the correct syntax to declare an integer variable in Java?

Accepted Answer

int num = 5;

Question 25

Which of these is NOT a type of operating system?

Accepted Answer

Central Processing OS

Question 26

What does the equals() method do in Java?

Accepted Answer

Checks if two objects are the same

Question 27

In graphics testing, what is usually being checks?

Accepted Answer

Logical outcomes like collisions or input detection

Question 28

Which method is automatically called when an object is created?

Accepted Answer

constructor

Question 29

Which of these is a valid way to declare a subclass?

Accepted Answer

public class A extends B

Question 30

The Unit of measurement used for one billion bhytes is:

Accepted Answer

Gigabyte(GB)

Question 31

What does the keyword this refer to in a Java class?

Accepted Answer

The current object

Question 32

Which of the following is not a valid Java Identifier?

Accepted Answer

123number

Question 33

What numbering system does a computer use to process information?

Accepted Answer

Binary

Question 34

What is the benefit of using private for fields?

Accepted Answer

They can only be accessed within the class

Question 35

What was the purpose of the ENIAC computer?

Accepted Answer

Military Calculations during WWII

Question 36

What is the correct syntax for a while loop?

Accepted Answer

while(condition) { // code }

Question 37

What is an example of artificial intelligence?

Accepted Answer

Siri on Apple devices

Question 38

What is the default value of an uninitialized int variable in Java?

Accepted Answer

0

Question 39

What is the purpose of the switch statement in Java?

Accepted Answer

Handling multiple conditions

Question 40

Which of the following is NOT a component of URL Structure?

Accepted Answer

Internet Protocol Address (IP address)

Question 41

What is one main advantage of using a debugger over print statements?

Accepted Answer

debuggers can stop the program and inspect variable at specific points

Question 42

What is the purpose of a getter method?

Accepted Answer

To return the value of a private field

Question 43

Which of the following best describes a solid-state drive (SSD)?

Accepted Answer

High-speed storage with no moving parts

Question 44

What will be the output of the following Java code?

Accepted Answer

0 1 2 3 4

Question 45

What does the following expression evaluate to? !(true && false)

Accepted Answer

true

Question 46

what is the output of the following Java code?

Accepted Answer

5 4 3 2 1

Question 47

Which of the following is the primary function of the BIOS in a computer?

Accepted Answer

Initial hardware checks and location the OS Kernel

Question 48

What is the output of the following code?

Accepted Answer

Ten

Question 49

What happens if a break statement is used inside a loop?

Accepted Answer

The loop is terminated immediately

Question 50

Which of the following is a Primitive Data Type?

Accepted Answer

int

Question 51

What is the result of 5 %2?

Accepted Answer

1

ICS3U (Grade 11) COmputer Science EXAM REVIEW

Questions 51

ICS3U (Grade 11) COmputer Science EXAM REVIEW

Questions 51