Revision Session 2

Revision Session 2

By Shahbaz Farooq

DNS, IP and MAC address

Some text here about the topic of discussion

Multiple Choice

What is an IP address?

• A unique human friendly address to a web page

• A set of unique numbers which identify a website / server

• The main part of a web address which identifies the website

• The beginning part of a web address which identifies how the web page is to be delivered to the user

Multiple Choice

Which of the following is a valid IP address?

• 100.11.16

• 73.193.256.17

• 73.193.52.17

• 73.193.256.17.12

Multiple Choice

What is the purpose of a DNS Server?

• Delivers requested pages to the end user

• Takes an IP address and directs the traffic to the correct human readable web address address

• Takes a human readable web address and directs the traffic to the correct IP address

• Streams video to an end user sequentially so that it may be watched without full download

Multiple Choice

Which of the following describes a protocol used to send web pages?

• https://google.com

• google.com

• https://www.google.com/search?q=cats

• https://

Multiple Choice

What is meant by hosting?

• A service that allows individuals and organisations to make their website available on the world wide web

• A service that creates websites for companies

• A service that transmits data in a network

• A service that translates alphabetic names into IP addresses

Multiple Choice

What is meant by latency in the performance of a network?

• The amount of time data takes to travel from the source to the destination

• The maximum rate that data can be transferred at

• The number of errors that are found in a data packet after transmission

• The route a packet takes when it is being transmitted

Multiple Choice

Which if these terms refers to the maximum rate at which data can be transferred?

• Error detection

• Packet switching

• Bandwidth

• Transmission media

Secondary Storage​

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Multiple Choice

Optical device, fairly fragile, easy to snap or scratch.

• Flash memory
• Magnetic Tape
• CD
• Hard disk

Multiple Choice

Not intended to be a portable storage device.

• CD
• Flash memory
• DVD
• Internal hard disk

Multiple Choice

Very portable as it is designed to be fitted into small electronic devices.

• Flash memory devices
• Internal hard disk
• Magnetic tape
• Server

Multiple Choice

The most durable storage device as it has not moving parts

• Solid State Storage
• Magnetic Storage
• Optical Storage

Multiple Choice

Which of the following is not a type of storage. (1/2)

• Magnetic
• Solid State
• Optical
• Hard Drive

Multiple Choice

What type of storage is a USB memory stick? (4/5)

• Solid State
• Optical
• Magnetic
• It is not a storage device

Binary Convertions

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Multiple Choice

Convert the binary number 1001 to decimal.

• 4

• 5

• 9

• 11

Multiple Choice

Convert the binary number 1110 to decimal.

• 3

• 10

• 15

• 14

Multiple Choice

Convert the decimal number 4 to binary.

• 1000

• 0101

• 0010

• 0100

Multiple Choice

Add the binary numbers 01101101 and 11011011

• 0101001000

• 1010110111

• 1101010101

• 0110100101

Multiple Choice

How many bits are in a byte?

• 4

• 2

• 8

• 10

Multiple Choice

How many bytes are in a kilobyte?

• 1024

• 100

• 1234

• 128

Images

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Multiple Choice

Quality of an image depends on:

• Resolution
• Metadata
• Screen size
• Computer's speed

Multiple Choice

Colour depth refers to:

• How many bits are used in a file to store colour information in every pixel
• Resolution divided by the number of colours in an image.
• Degree of file compression applied to an image file.
• Repeated resampling of an image.

Sound

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Multiple Choice

How is sound caused?

• By playing it through a hi-fi with speakers
• Vibrations travelling through air, water or metal.

Multiple Choice

What is amplitude?

• Number of samples taken

• The number of bits per sample

• The height of the sound wave

• The pitch

Multiple Choice

What is Pitch?

• How loud or soft a sound is
• muscle that holds vocal cords
• movement back and forth
• how high or low a sound is

Multiple Choice

What is sample resolution?

• The number of bits used to store each sample

• The number of times a wave is sampled

• How loud a sound is

• How quiet a sound is

Multiple Choice

What is the sample rate?

• The number of times a sound wave is sampled per second

• The number of bits used to store each sample

• How loud a sound is

• The size of the sound wave

Multiple Choice

What is sample rate measure in?

• Bits

• Hertz

• GB

• amps

Multiple Choice

What is the formula for finding a sound files size?

• size = rate * resolution * seconds

• size = rate * resolution * minutes

• size = amplitude * bits * seconds

• size = sample * frequency * bits

Compression

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Multiple Choice

The purpose of data compression is to decrease file sizes .

• True
• False

Multiple Choice

What is Lossless Compression?

• No information is lost but file size is increased
• There is no loss of information at all after compression
• Files which have the exact same data after compression
• Compression involves an algorithm

Multiple Choice

What does Lossy Compression do to files?

• Increases the file size and keeps the same quality
• Eliminates no information at all
• Decreases the file size and keeps the same quality
• Eliminates unnecessary information in a file to reduce file size

Multiple Choice

What type of compression would you use to compress a video?

• Lossy
• Lossless

Multiple Choice

What type of compression would you use to compress a text file?

• Lossy
• Lossless

Multiple Choice

When Lossy compression is used data is lost?

• True
• False

Multiple Choice

Has this been compressed using Lossy or Lossless?

• Lossy
• Lossless

Multiple Choice

Has this been compressed using Lossy or Lossless?

• Lossy
• Lossless

Characters

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Multiple Choice

A character set is...

• What language can be used in a computer system.
• The fonts that a computer has installed.
• The possible characters that can be represented by a computer system.

Multiple Choice

How many bits are used in (standard) ASCII?

• 16
• 1
• 7
• 8

Multiple Choice

ASCII stands for... 

• American Standard Code for Information Interchange
• American Scientific Code for Information Interchanging
• Absolute Standard Codes for Instruction Interchange

Multiple Choice

What is the maximum number of values that can be represented in 7 bits?

• 127
• 256
• 65,536
• 128

Multiple Choice

What is the maximum number of values that can be represented in 8 bits?

• 255
• 256
• 65,536
• 128

Multiple Choice

How many bits are used in Unicode?

• 8
• 16
• 2
• 32

CPU

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Multiple Choice

The CPU is:

• Control processing unit

• Centralised process unit

• Central process unified

• Central processing unit

Multiple Choice

The processor…

• Carries out instructions

• Is main memory

• Is secondary storage

• Is an input device

Multiple Choice

The Processor doesn’t do the following

• Process data

• Execute instructions

• Execute data

• Operate in Hz

Multiple Choice

The part of a processor in which instructions are executed is known as?

• Core

• Centre

• Execution

• Instruction centre

Multiple Choice

What acts as an intermediary between the processor and the main memory?

• Bus

• User

• Cache

• Clock

Multiple Choice

What is held in cache?

• All the programming instructions

• Commonly used instructions and data

• Instructions that have been processed

• Data that hasn’t been used for a long time

Multiple Choice

This would perform an operation such as 5+8 ?

• Arithmetic Logic Unit

• Accumulator

• Cache

• Control Unit

Multiple Choice

This carries the address of the next instruction:

• Address bus

• Data bus

• Control bus

• System bus

Multiple Choice

What is a property of an address bus?

• Carries data and instructions

• Uni-directional

• Bi-directional

• Carries control signals

Multiple Choice

What is transferred down the data bus?

• Data only

• Address Only

• Data and Instructions

• Data, Instructions and Addressess

Multiple Choice

This is not a type of secondary storage

• Blu-Ray Drive/Disc

• Flash Memory

• Hard Disk Drive

• RAM

Multiple Choice

What is the purpose of the accumulator?

• To perform arithmetic operations

• To hold the results of a calculation

• To hold the accumulation of instructions that have happened

• To remember the previous instruction being worked on

​Impact of Technology