Date: ___________________
Computer
Q#1 (a) Computer ethics involves a number of different topics.
(i) A student made the following statement on an examination paper:
“It allows a user to have the freedom to run, copy, change and adapt the software and then pass it on to a
colleague, friend or family member.”
Identify which computer term the student was describing.
_______________________________________________________________________________________ [1]
(ii) Explain what is meant by computer ethics.
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________ [3]
(b) The four statements below refer to firewalls and proxy servers.
Study each statement.
Tick (9) the appropriate column(s) to indicate whether the statement refers to a firewall and/or a proxy
server.
Statement
Firewall
Proxy server
Speeds up access of information from a web server by
using a cache
Filters all Internet traffic coming into and out from a
user’s computer, intranet or private network
Helps to prevent malware, including viruses, from
entering a user’s computer
Keeps a list of undesirable websites and IP addresses
(c)A computer includes an Integrated Circuit (IC) and a Universal Serial Bus (USB) for data transmission.
Describe how the computer uses these for data transmission, including the type of data transmission used.
IC _______________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
USB
__________________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
_______________________________________________________________________________________ [4]
Q#2 Kamil correctly answers an examination question about a number of internet terms. Six different terms
have been removed from Kamil’s answer. Complete the sentences in Kamil’s answer, using the list given. Not
all terms in the list need to be used.
• browser
• connection
• domain name server (DNS)
• Internet
• Internet Service
Provider (ISP)
• IP address
• MAC address
• network
• protocol
• uniform resource locator (URL)
• webpages
• hypertext mark-up language
(HTML)
A_________________________________________________________ is a program that allows a user to view
______________________________________ An
__________________________________________________ is a company that provides a connection to
access the .____________________________________________________________________The main
____________________________________________________that governs the transmission of data using the
Internet is http. The .___________________________________________ is provided by the network, and
given to each device on the network. [6]
Q#3 (a) Four statements about cookies are shown in the table below.
Study each statement.
Tick (✓) to show whether the statement is true or false.
Statement
True
they are a form of spyware
they are used only in advertising
False
they are used to track browser use
they act in the same way as a virus
(b) Describe three ethical issues that should be considered when using computers.
1 ________________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
2 ________________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
3 ________________________________________________________________________________________
__________________________________________________________________________________________
_______________________________________________________________________________________ [3]
Date: ___________________
Computer
Q#1 An alarm clock is controlled by a microprocessor. It uses the 24-hour clock. The hour is represented by an
8-bit register, A, and the number of minutes is represented by another 8-bit register, B.
(a) Identify what time is represented by the following two 8-bit registers.
A
B
[2]
(b) An alarm has been set for 07:30. Two 8-bit registers, C and D, are used to represent the hours and minutes
of the alarm time.
Show how 07:30 would be represented by these two registers:
[2]
(c) Describe how the microprocessor can determine when to sound the clock alarm.
__________________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
_______________________________________________________________________________________ [3]
(d) The LCD (liquid crystal display) on the clock face is back-lit using blue LEDs (light emitting diodes). The
brightness of the clock face is determined by the level of light in the room. The amount of light given out by
the LEDs is controlled by a control circuit.
Describe how the sensor, microprocessor and LEDs are used to maintain the correct brightness of the clock
face.
__________________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
_______________________________________________________________________________________ [3]
(e) Modern LCD monitors and televisions use LED back-lit technology.
Give two advantages of using this new technology compared to the older cold cathode fluorescent lamp
(CCFL) method.
1 ________________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
2 ________________________________________________________________________________________
__________________________________________________________________________________________
_______________________________________________________________________________________ [2]
Q#2 (a) Gurdeep wants to send a large file to Jennifer over the Internet. State two benefits of compressing
the file to send it.
Benefit 1 __________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
Benefit 2 __________________________________________________________________________________
__________________________________________________________________________________________
________________________________________________________________________________________[2]
(b) Two types of compression are lossy and lossless. Choose the most suitable type of compression for the
following and explain your choice.
(i) Downloading the code for a computer program:
Type of compression _______________________________________________________________
Explanation
__________________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
_______________________________________________________________________________________ [3]
(ii) Streaming a video file:
Type of compression _______________________________________________________________
Explanation
__________________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
_______________________________________________________________________________________ [3]
Date: ___________________
Computer
Q#1 (a) Nikita wishes to print out some documents and connects her printer to the computer using one of the
USB ports.
(i) Identify what type of data transmission is being used.
_______________________________________________________________________________________ [1]
(ii) Give three reasons for using a USB port.
1 _______________________________________________________________________________________
________________________________________________________________________________________
2 _______________________________________________________________________________________
________________________________________________________________________________________
3 _______________________________________________________________________________________
_______________________________________________________________________________________ [3]
(iii) The printer runs out of paper while it is printing the documents. A signal is sent to the processor to
request that the problem is dealt with.
Name this type of signal.
_______________________________________________________________________________________ [1]
(b) State one suitable application for each printer below. A different application must be given for each printer.
Inkjet printer _______________________________________________________________________________
_________________________________________________________________________________________
3D printer _________________________________________________________________________________
_______________________________________________________________________________________ [2]
(c) Name another type of printer and describe one way in which it is different from the printers named in part
(b). Give an application for this printer.
Type of printer _____________________________________________________________________________
Description ________________________________________________________________________________
__________________________________________________________________________________________
Application ________________________________________________________________________________
_____________________________________________________________________________ __________[3]
(d) The music company is concerned about the security of its website. The company uses a proxy server as
part of its security system. Describe the role of a proxy server in the security system.
__________________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
_______________________________________________________________________________________ [4]
Q2:
(a) Explain what is meant by a denial-of-service attack.
__________________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
_______________________________________________________________________________________ [2]
(b) Name and describe two other potential security threats when using the Internet.
Security threat 1 ____________________________________________________________________________
Description ________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
Security threat 1 ____________________________________________________________________________
Description ________________________________________________________________________________
__________________________________________________________________________________________
________________________________________________________________________________________[4]
Q 3: Company has a number of offices around the world.
a) Data is transmitted between the offices aver the Internet. In order to keep the data safe, the company
is using Secure Socket Layer (SSL) protocol and a firewall at each afire.
Explain how SSL protocol and a firewall will keep the company's data safe.
SSL protocol _______________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
Firewall ___________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
________________________________________________________________________________________[4]
b) A company stores personal details of its customers on a computer system behind a firewall. Explain,
with reasons, what else the company should do to keep this data safe.
__________________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
Date: ___________________
Computer
Q1:
Company has a number of offices around the world.
a) Data is transmitted between the offices over the Internet In order to keen the data safe the company is
using Secure Socket Layer (SSL) protocol and a firewall at each office.
Explain how SSL protocol and a firewall will keep the company's data safe.
SSL protocol _______________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
Firewall ___________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
b) A company stores personal details of its customers on a computer system behind a firewall. Explain, with
reasons, what else the company should do to keep this data safe.
__________________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
________________________________________________________________________________________[4]
Question 2
(a) Describe what is meant by Transport Layer Security (TLS).
__________________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
b) Name three different applications of TLS.
1
____________________________________________________________________________________
2
____________________________________________________________________________________
3
____________________________________________________________________________________
3 (a) A computer has 2048 MB of RAM.
How many GB of RAM does the computer have?
Show your working.
____________________________________________________________________________
____________________________________________________________________________
____________________________________________________________________________
____________________________________________________________________________
____________________________________________________________________________
____________________________________________________________________________
_______________________________GB [2]
4 Michele wants to email a file to Elsa. The file is too large so it must be compressed.
(a) Name two types of compression that Michele could use.
Compression type 1 ______________________________________________________________
Compression type 2 ____________________________________________________________[2]
(b) The file Michele is sending contains the source code for a large computer program.
Identify which type of compression would be most suitable for Michele to use.
Explain your choice.
Compression type _______________________________________________________________
Explanation. ____________________________________________________________________
____________________________________________________________________________
____________________________________________________________________________
____________________________________________________________________________
____________________________________________________________________________
___________________________________________________________________________ [4]