May/June 2016 Exam corrections

Question 1

What is freeware?

Answer 1

• Soft ware that can be feely accessed and modified as required
• It is possible to distribute modified versions of the software to friends and family

Question 2

What is shareware?

Answer 2

• All the features of the full version of the software are not made available; the full version needs to be purchased first
• The original software is subject to all copyright laws

Question 3

What does MAC stand for?

Answer 3

Media Access Control

Question 4

What does the Hexadecimal code in a MAC address represent?

Answer 4

• The physical hardware of the device
• The device’s unique address
• Usually 48/64 bits

Question 5

Why are SSDs becoming more popular than HDDs?

Answer 5

• More durable (no moving parts)
• Faster
• Smaller
• Less power
• Getting cheaper (not as cheap as HDD for the capacity yet)

Question 6

What is it called when a printer runs out of ink while printing documents and it sends a signal to the processor to deal with the problem?

Answer 6

AN INTERRUPT

Question 7

Name a suitable application for an INK JET printer…

Answer 7

• Photographs

- Small quantities of documents

Question 8

Name a suitable application for a 3D printer…

Answer 8

• To make a physical prototype from CAD

- To make a physical model of something (blueprint)

Question 9

Name a suitable application for a LASER printer… (and how it works)

Answer 9

• Uses toner/powder ink
• Uses positive and negative rotating charged drums
• Uses static charge
• No moving head
• Faster at printing
• Better orientated to higher volumes/output speed
• Good for producing flyers/leaflets/magazines

Question 10

What stages does a web browser go through to detect whether or not a website is secure?

Answer 10

• Requests web server to identify itself/view the (SSL) certificate
• Receives a copy of the (SSL) certificate, sent from the webserver
• Checks if the SSL certificate is authentic/trust worthy
• Sends a signal back to webserver that the certificate is authentic/trustworthy
• Starts to transmit data once connection is established as secure
• If a website is not secure browser will display an open padlock/warning message

Question 11

Why would a bank’s online service ask for four random characters from the user’s password?

Answer 11

• Hacker never finds all characters on the first hack
• Makes it more difficult for hackers to find the order of the characters
• Hacker needs to hack the system several times to gain the whole password
• Shoulder surfing will not give the person the full password