Y10 Midcourse Warm-up P1

Match the following number systems to their base

• Denary

• Base-10

• Hexadecimal

• Base-2

• Binary

• Base-16

Put the following numbers in order from smallest to largest

• 11

  (base-2)

• 10

  (base-10)

• D

  (base-16)

• 1111

  (base-2)

• 4

  (base-16)

Shift the binary number 0001 1010 2 positions to the left

• 0110 1000

• 1101 0000

• 0011 0100

• 0000 0110

Match the following examples of malware with their descriptions

• This malware is also to self-replicate and spread through a network

• Virus

• This malware is attached to a file and will replicate itself when run

• Adware

• This malware secretly collects data about users

• Worm

• This malware displays advertising on a user's computer without permission

• Ransomware

• This malware locks a user's computer until a fee is paid to the attackers

• Spyware

There are 2 main types of compression: lossy and lossless. ​ (a)   compression removes parts of the original ​ (b)   data to reduce the file size. Whereas ​ (c)   compression looks for patterns within a file that can be re-written in a more efficient manner. A lossy compressed file will have a ​ (d)   file size than a lossless compressed file.

• lossy
• raw
• lossless
• smaller
• larger

Data travels using one single wire in one direction: ​ (a)  

Data travels using multiple wires in both directions at the same time: ​ (b)  

Data travels using multiple wires in both directions but not at the same time: ​ (c)  

• serial-simplex
• parallel-duplex
• parallel-half-duplex
• parallel-simplex
• serial-duplex
• serial-half-duplex

Mr Rigby is worried about DDoS attacks against his web server, what security tool could he use to protect his server?

(a)  

Match the following

• HTTP

• Unique number provided by the NIC

• URL

• Converts URLs into IP addresses

• DNS

• Human readable website address

• IP address

• The protocol used to send and receive online data

• MAC address

• Unique number provided by a router

Which of the following is not a feature of ARQ

• Positive Acknowledgement

• Timeout

• Parity bit

• Negative Acknowledgement

Match the following input/output devices to their description

• Output - Creates an object by building up a shape layer by layer

• 3D Printer

• Input - Light is focused through a lens onto a CCD divided into pixels

• Resistive Touchscreen

• Input - Users press down on a flexible plastic surface to complete a circuit

• 2D Cutter

• Output - Uses a high intensity laser to cut out shapes on a flat surface

• Webcam

• Output - Uses static electricity and heat to fuse toner to paper

• Laser Printer