Final exams Pt 1

Question 1

List the major components of a computer

Answer 1

• Central Processing Unit (CPU)
• Graphics Processing Unit/Video Card
• Random Access Memory (RAM)
• Read Only Memory (ROM)
• Secondary Memory (HDD, SSD)
• Motherboard
• Peripherals

Question 2

List 3 things a CPU does

Answer 2

• Perform Logical Operations
• Process Data
• Store Data

Question 3

Give the functions of: RAM, Secondary Memory, GPU, Peripherals

Answer 3

• RAM: Store data short term while the computer is working with it
• Secondary Memory: Store data long term, while a program is closed or while the computer is turned off
• GPU: Process graphics calculations and create images
• Peripherals: Take input and give output to the user

Question 4

What are the 5 data types that variables can be? Give a literal example of each.

Answer 4

• int – 5, 10, -5 (whole numbers)
• float – 2.0, 3.6, 0.45 (integers)
• char – ‘a’, ‘@’, ‘P’ (characters)
• String – “Hello!”, “this is a sentence” (words)
• boolean – true, false (true or false)

Question 5

What are the requirements for a variable identifier?

Answer 5

Must start with a letter, can only contain letters, numbers, and the underscore ( )

Question 6

Variable declaration statement:
A variable to hold the number of birds spotted in a day

Answer 6

int birds;

Question 7

Variable declaration statement:
A variable for someone’s overall average mark at school

Answer 7

float mark;

Question 8

Variable declaration statement:
A variable for the vertical position of a circle on the screen

Answer 8

1) int y;
2) float y;

Question 9

Variable declaration statement:
A variable to hold someone’s name

Answer 9

String name;

Question 10

Variable declaration statement:
A variable to indicate if an event needs to start

Answer 10

boolean go;

Question 11

Variable declaration statement:
A variable to hold a key on the keyboard

Answer 11

char letter;

Question 12

Variable initialization statement:
A variable to hold the sum of a bunch of numbers.

Answer 12

int sum = 0;

Question 13

Variable initialization statement:
A variable which will be used to calculate the product of set of numbers

Answer 13

float product = 1; or int product = 1;

Question 14

A variable that will hold the name of a character.

Answer 14

String name = “your name”;