unit 1 - Computer systems revision

Question 1

How are real numbers stored in memory?

Accepted Answer

Using floating-point with sign, exponent, mantissa

Question 2

Which vector object is used to create circles or ovals?

Accepted Answer

Ellipse

Question 3

What do firewall rules check?

Accepted Answer

IP addresses and port numbers

Question 4

What is a group of 8 bits called?

Accepted Answer

Byte

Question 5

How do vector graphics represent images?

Accepted Answer

By storing object attributes and instructions

Question 6

What is floating point representation?

Accepted Answer

Mantissa for precision, exponent for range

Question 7

Which vector object can be used to create irregular multi-angled shapes?

Accepted Answer

Polygon

Question 8

What are the two main types of memory?

Accepted Answer

RAM and ROM

Question 9

What does ASCII stand for?

Accepted Answer

Binary codes for characters

Question 10

What is the decimal value of the binary number 11011110?

Accepted Answer

222

Question 11

What is the purpose of a firewall?

Accepted Answer

Filter packets between networks

Question 12

What is a limitation of using a compiler during development?

Accepted Answer

Interpreter allows interactive debugging

Question 13

What does a firewall protect against?

Accepted Answer

Unauthorised access

Question 14

What is the role of the address bus in a computer system?

Accepted Answer

Holds the memory address being accessed

Question 15

Which of the following is a high-level language?

Accepted Answer

Python

Question 16

What makes every RAM location unique?

Accepted Answer

Address

Question 17

What happens when you zoom into a bitmap image?

Accepted Answer

The image becomes pixelated

Question 18

How are bitmapped images represented?

Accepted Answer

As a grid of pixels, each with a specific colour

Question 19

What is the correct binary representation of the number 87?

Accepted Answer

01010111

Question 20

What is the decimal equivalent of the binary number 01101100?

Accepted Answer

108

Question 21

What type of software are compilers and interpreters?

Accepted Answer

Translators

Question 22

How are characters represented using extended ASCII (8-bit)?

Accepted Answer

Each character is given an 8-bit code

Question 23

Which action reduces energy consumption?

Accepted Answer

Reduce brightness

Question 24

What is the denary (decimal) value of the binary number 11001100?

Accepted Answer

204

Question 25

Which setting reduces power to components while keeping RAM powered?

Accepted Answer

Standby

Question 26

What is the correct binary representation of the number 111?

Accepted Answer

01101111

Question 27

How can power management software reduce energy use?

Accepted Answer

Power down hard drive

Question 28

What does “bit” stand for?

Accepted Answer

Binary Digit

Question 29

What is the purpose of registers?

Accepted Answer

Store immediate-use data for the CPU

Question 30

What is the difference between non-printable and printable ASCII characters?

Accepted Answer

Non-printable characters are for special functions that you don't see.

Question 31

Which setting saves RAM contents to disk and cuts power?

Accepted Answer

Hibernate

Question 32

How does binary represent positive integers?

Accepted Answer

Using 0s and 1s — e.g. 5 is 101

Question 33

How many main parts make up the CPU?

Accepted Answer

3

Question 34

Why is energy use high during system startup?

Accepted Answer

Power surge from multiple components

Question 35

Which part carries the memory address of redAvailable?

Accepted Answer

Address Bus

Question 36

What is an advantage of using a compiler?

Accepted Answer

Only needs to be in RAM once

Question 37

Which vector object would you use to draw a circle or oval shape?

Accepted Answer

Ellipse

Question 38

What does it mean when memory is “volatile”?

Accepted Answer

Loses data when power is off

Question 39

What is the role of the data bus?

Accepted Answer

Transfers data between RAM and CPU

Question 40

What is the purpose of the ALU?

Accepted Answer

Perform arithmetic and logical operations

Question 41

Which part transfers the value of redAvailable from RAM to CPU?

Accepted Answer

Data Bus

Question 42

True or false: Vector graphics are created from a list of attributes.

Accepted Answer

True

Question 43

Which component of the CPU performs calculations during execution?

Accepted Answer

ALU

Question 44

What are registers used for?

Accepted Answer

Temporary storage on the processor

Question 45

What is the binary representation of the number 14?

Accepted Answer

1110

Question 46

How many bits are needed to store a 4-character message in ASCII?

Accepted Answer

32

Question 47

What is machine code?

Accepted Answer

Low-level language for hardware

Question 48

What happens when you zoom into a vector (SVG) image?

Accepted Answer

The image maintains its quality

Question 49

How are vector graphics stored in a computer?

Accepted Answer

As mathematical formulas and attributes

Question 50

What is an advantage of using an interpreter during development?

Accepted Answer

Highlights location of errors

Question 51

Which attributes are used to represent the position of objects in vector graphics?

Accepted Answer

Co-ordinates

Question 52

What is the denary (decimal) value of the binary number 01011011?

Accepted Answer

91

Question 53

What process scrambles data before transmission?

Accepted Answer

Encryption

Question 54

Which part calculates the new value of redAvailable?

Accepted Answer

ALU

Question 55

What does the Arithmetic Logic Unit (ALU) do?

Accepted Answer

Performs arithmetic and logical operations

unit 1 - Computer systems revision

Questions 55

unit 1 - Computer systems revision

Questions 55