PAPER 1 REVISION COMPUTER SCIENCE

Question 1

The result of carrying out an arithmetic shift right, one place to an 8-bitbinary integer is...

Accepted Answer

The value of the number is divided by 2.

Question 2

Select which of the following statements describe the role of an ethical hacker

Accepted Answer

document vulnerabilities / provide advice on how to fix them, a network expert which carries out penetration testing, find security vulnerabilities that a hacker can exploit

Question 3

Identify the type of software used to imitate a real world situation.

Accepted Answer

Simulation software

Question 4

If the data is intercepted by a third party it can only be read using the unique decryption key

Accepted Answer

true

Question 5

Which of the following describes the concept of a stored program? Select two statements.

Accepted Answer

Enables a single control unit to manage the program control, A program must be resident in memory in order to be executed

Question 6

Each layer of the TCP/IP model prepares data for transmission from one computer to another

Accepted Answer

true

Question 7

Identify the type of cyberattack from which HTTPS offers some protection.

Accepted Answer

Eavesdropping

Question 8

Identify a method of translation that you could use to develop an app.

Accepted Answer

Use a compiler

Question 9

Which of the following statements is a disadvantage of using open-source software?

Accepted Answer

The interface won't be a priority for open source developers

Question 10

Which of the following statements does not describe how data is stored on a solid state disc.

Accepted Answer

Data is stored digitally in the form of cells.

Question 11

Convert the background hex code BB4A0F into a binary number.

Accepted Answer

1011 1011 0100 1010 0000 1111

Question 12

Explain why hexadecimal notation is preferred to binary notation when specifying screen colours

Accepted Answer

Shorthand form that is easier for humans to read.

Question 13

AADACCEFABAAECFGBDGE represents an image. Why is RLE inappropriate to encode this image?

Accepted Answer

This sequence has very few repeated patterns to compress.

Question 14

A university implements two-part user authentication as a network security measure. Name two:

Accepted Answer

Password, Username

Question 15

Which of the following statements are incorrect? Choose two.

Accepted Answer

AND : If inputs are 0 and 1, then the output will be 0., OR : If inputs are 0 and 1, then the output will be 0.

Question 16

Describe the roles of the router on the network.

Accepted Answer

Connects the LAN to the Internet, Directs data packets to / from tables to / from the Internet

Question 17

Which 2 statements describe the effects of using the JPEG compression format for the images?

Accepted Answer

File sizes / download times will be reduced., Some loss of image data / image quality will occur.

Question 18

Select 2 functions of an operating system.

Accepted Answer

Allocating the processor and resources to running programs., Assigning blocks of memory to running programs as required.

Question 19

Identify one model where all workstations have equal status.

Accepted Answer

Peer-to-peer

Question 20

Which of the following doesn't describe the concept of overflow in relation to binary addition?

Accepted Answer

The sum does not exceed the word length of the CPU.

Question 21

Which of these statements incorrectly describe proprietary software?

Accepted Answer

Will be more vulnerable to malicious code

Question 22

Identify the component of the CPU that holds the current program instruction.

Accepted Answer

Register

Question 23

Which of the following two statements best describe a star network?

Accepted Answer

Every node connects to a central network device like a hub., The central network device acts like a router

Question 24

Identify the purpose of program translation.

Accepted Answer

To change high-level code into machine code.

Question 25

There are four layers in a simple TCP/IP model

Accepted Answer

true

Question 26

Why should you develop an app using a high-level programming language? Select two statements.

Accepted Answer

Non specialist: can be developed without hardware knowledge, Accessible: easily read as it's closer to natural language

Question 27

Data is sent downwards from the application through protocol stack to the physical layer

Accepted Answer

true

Question 28

Explain the purpose of HTTP. Select two statements which describe the purpose the best.

Accepted Answer

enables the exchange of data between a client & a web server, defines how messages are formatted and transmitted

Question 29

What type of organisation do you have to pay to access the internet?

Accepted Answer

INTERNET SERVICE PROVIDER

Question 30

State the type of memory used to store a computer’s start up program.

Accepted Answer

ROM

Question 31

24-bit RGB images will be displayed at 400 x 250px. Which expression calculates the size in KB?

Accepted Answer

(400 x 250 x 24) / (8 x 24)

Question 32

Identify the binary system used to represent text.

Accepted Answer

ASCII

Question 33

Identify the protocol used to send email messages to an email server.

Accepted Answer

SMTP

Question 34

Describe the role of a client workstation.

Accepted Answer

To provide a platform to run apps & access network resources

Question 35

Explain the role of Ethernet protocol. Select the correct statements.

Accepted Answer

describe network devices can format data for transmission, define standards for network cabling, define corresponding transmission speeds

PAPER 1 REVISION COMPUTER SCIENCE

Questions 35

PAPER 1 REVISION COMPUTER SCIENCE

Questions 35