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J277 Paper 1 2022 Part 1 Flashcards | StudBud
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J277 Paper 1 2022 Part 1
J277 Paper 1 2022 Part 1
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1
Which of the following is
not
an example of secondary storage?
USB memory stick
RAM
Solid state drive
Hard disk drive
2
Which type of connection gives the best performance?
4g
WiFi
Fibre optic
Copper cables
3
What is a pixel?
A dot
A circle
A square
A picture element
4
Which of the following is true?
Flash memory is quick because it has no moving parts
Flash memory is lightweight and durable
Flash memory is considerably cheaper per GB than the equivalent HDD space
Flash memory is compact, it stores a lot of data in a small physical space
5
When recording audio, the sample size is usually measured in
hertz
bytes
bits
megabits
6
A drawback of using the Unicode character set over an ASCII character set is...
It takes up more storage space
Can be used for to represent many languages
More characters can be represented
7
The purpose of the accumulator is to
Hold the address of an instruction
Store the result of a calculation by the ALU
Store data fetched from memory
Perform mathematical operations
8
A fibre optic cable is...
A transmission media that sends data with electronic pulses
A transmission media that is made from glass or plastic threads
9
Which of the following does the control unit
not
do?
Provides control signals
Store data fetched from memory
Provides timing signals
Sends signals to memory, ALU and/or I/O devices
10
The purpose of a router is to...
Convert signals from analogue to digital and vice-versa
Connect networks by forwarding packets of data from 1 network to another
Connect computers together using a wireless signal
Connect computers together by forwarding packets from 1 computer to another
11
The higher the bitrate of a track...Which of the following is NOT true?
...the higher the quality
...the quicker it can be transmitted across the internet
...the more storage space it will take up
12
What is a limitation of the ASCII character set?
Takes a long time to transmit ASCII codes, so it can slow down the computer
Have to be converted from ASCII to binary, so it slows down the computer
Represents up to 256 characters, not enough to be used in other languages
13
What is the aim of compression?
Change the number system used to represent the data
Convert one file to another
To reduce the size of data to save space
Shrink the size of binary digits
14
A USB memory stick is an example of which
type
of storage?
RAM
Magnetic
Solid state
Optical
15
Which of the following can be accessed the quickest by the CPU?
HDD
ROM
CPU Registers
RAM
16
Computers need a wired or wireless NIC to be able to connect to a network. What is a NIC?
Network Interface Connection
Network Interface Card
Network Interactive Connection
Net Internet Connection
17
When the computer records a sample, it is measuring the...
Tone
Wave height
Frequency
Pitch
18
What is meant by the term 'resolution'?
The number of bits needed to store an image
Total number of pixels in an image
The file size of an image
19
What is meant by 'secondary storage'?
Any long-term, permanent, non-volatile form of storage
RAM
Storage that is used for backing up data
Storage that is directly accessible by the CPU
20
ROM is
Volatile
A processor of data
Non-Volatile
21
Why is compression used when sending data across networks?
It avoids data from getting errors
Because it makes more efficient use of available bandwidth
Because it has to be used as determined by protocols
22
What is the PC used to store?
A count of the number of instructions in a computer program
The next instruction that the computer will need to execute
A count of the number of instructions that have been processed
23
Which of the following are NOT true about a server-client relationship?
They centrally stores files or software
They have equal status with clients
They processes requests
They manages clients
24
What is the MDR used to store?
RAM
Memory
A value fetched/to store to memory
Files
25
Virtual memory is used when...
The PC needs more physical memory than available to run the desired program
Memory is full
There is no storage space left
The computer needs to run more quickly
26
Which of the following is a potential drawback of a client-server network?
If too many people access the server at once, it will be overloaded
Security can be centrally managed
Software can be stored and distributed from a central location
If files are stored centrally, then backing up files is straightforward
27
A web browser is being used to access web pages. Which role are in operation?
Client-server
Peer-to-peer
28
Virtual memory is...
A technique that improves the performance of a CPU
A technique that extends physical memory by using secondary storage
Stored on the hard disk drive
RAM that is on the hard disk
29
What is the MAR used to store?
The address of a memory location
Instructions
Data or instructions
Data
30
What does the ALU do?
Performs mathematical and logic calculations
Controls movement of data between memory and the CPU
Keeps track of which instruction is currently being executed
Keeps a running total of the number of programs being ran
31
Why must ROM be non-volatile? (select the best answer)
Non-volatile means the memory does not need power to store programs....
So it can store computer programs when the computer is turned on....
So when the computer is turned on, it works
32
Cache memory enables...
The CPU to fetch instructions quicker
The CPU to use less virtual memory
The CPU to execute more than one instruction at the same time
33
If there is a poor WiFi signal in a house, what could be done to improve the signal strength?
Try to connect using a 2.4Ghz connection if it was using a 5Ghz connection.
Move the WiFi access point to a more central location
Install a WiFi extender
Change the type of encryption used by the wireless access point
34
Describe the Fetch part of the FDE Cycle
The CPU's control unit works out what the instruction means.
get an instruction from main memory.
Sending out signals that tells the CPU what to do. Include r/w from/to RAM
35
A bit-depth of 24 bits per pixel means that how many bytes of storage space is allocated to representing each pixel?
24 bytes
2 bytes
4 bytes
3 bytes
36
The sampling interval when recording sound is measured in...
Bits
Hertz
Megabits
Bytes
37
How is data stored on a hard disk drive?
Using logic circuits (power is used to turn transistors on or off)
Using magnetised/demagnetised elements
Using lasers to read/write pits/lands
38
More RAM is installed in a computer, but there is no difference in performance. Why?
Because virtual memory is being used instead
Because it is volatile, it makes no difference
Instructions in use did not exceed the original capacity of the RAM
39
What is meant by the term 'character set'?
ASCII characters
The agreed set of codes to represent the characters available to a computer
A set of characters used for communicating in a common language such as Eng
A set of characters
40
An author wants to compress some written documents. Which of the following type of compression cannot be used?
lossy
lossless
41
Increasing the bit-depth will ...
Increasing the number of colours that can be represented in the image
Increasing the file size
Decreasing the processing power required to show the image
42
Madison is recording an audio track. Which of the following settings will result in the best quality audio?
64 kbps
128 kbps
256 kbps
43
All of the following are reasons for using ROM to store a program for a washing machine, except for...
Virus attack is unlikely (in the case of SMART washing machines)
It retains the program, even if the machine is turned off
It is cheaper than RAM
It prevents users from changing the program set by the manufacturers
44
Which of the following does
not
impact upon the performance of a network?
How much power is available at any moment in time
Number of concurrent users
Electromagnetic interference
Distance from a WAP (if using WiFi)
45
Which of the following storage devices uses the least amount of power?
Solid state (AKA 'flash' memory)
Tape drive
Optical drive
Hard disk
46
What word is this? 67, 65, 78 (A = 65).
BAT
CAT
CAN
SAM
47
How is data stored on a solid state drive?
Using lasers to read/write pits/lands
Using magnetised/demagnetised elements
Using logic circuits (power is used to turn transistors on or off)
48
Which transmision media is a central wire, surrounded by insulation + a shield of braided wire to minimise interference?
Fibre optic
Twisted pair
Coaxial
Ethernet
49
Which of the following is a drawback of using compression?
It takes longer to send a compressed file by email than uncompressed
Compressed files need to be decompressed before they can be used
Compressed files take up more storage than uncompressed files
50
Which unit of storage is likely to be the most appropriate for a video of a HD TV episode?
Megabyte
Kilobyte
Gigabyte
Byte
51
Which of the following is metadata
not
useful for?
Plotting images on to a map to show where they were take
Sharing images online
Telling the computer how to represent the image on screen
Recording the camera settings used to take the photo
52
ROM is designed for...
Cache
Software
Hardware
Firmware
53
What is RAM used for in a Von Neumann computer?
Processing instructions
Sending data from one location to another
Storing data and instructions
Storing user files for long-term storage
54
A lower file size is typically achievable with...
Lossy compression
Lossless compression
55
The following are all parts of the CPU. Which is
not
a register?
ALU
MAR
MDR
PC
56
Computer runs slowly when alot of applications are opened at the same time. Most likely solution to make it run quicker?
Upgrade the CPU
Install more physical memory
Add a bigger hard disk drive
Improve the power supply
57
An ASCII text file has 200 characters. How much storage space should be allocated for this file?
220 bits
200 kilobytes
200 bytes
200 bits
58
The more colours that a pixel can be...
...the fewer bits need to be used to represent each pixel
...the more bits need to be used to represent each pixel
59
A modern smartphone contains ROM chips as well as RAM. Why must it contain ROM?
So it knows what to do when it is first turned on
So it can cache most recently used instructions to speed up execution time.
So it can store important user data
So it can store media files
60
The PC, unless told otherwise, will automatically do what?
Increment its content by one (+1)
Pass count data to the instruction register
Pass an instruction to the instruction register
Clear itself, ready for the next instruction
61
Some processors have cache memory either built in or near by. What is cache memory used for?
Processing instructions
Storing a complete computer program
Storing a copy of instructions or pre-empted instructions
Performing calculations
62
The process of moving data between main memory and virtual memory is called...
storing
flipping
swapping
processing
63
Which of the following is an example of 'primary memory'?
Solid state drive
Hard disk drive
Main memory (e.g. RAM, SRAM etc)
Data or instructions
64
A hard drive disk is an example of which
type
of storage?
Magnetic
Solid state
RAM
Optical
65
What is lossless compression?
When compressed, no original data is lost. Original data can be restored.
Unnecessary" data is removed. Original data cannot be restored.
66
Which type(s) of network allow files to be shared?
client-server
client-server and peer-to-peer
peer-to-peer
67
When recording audio, a 'sample' is a digital representation of...
The time at which the sample was taken
The frequency
The amplitude of the wave
How much storage space the wave takes up
68
What is 'metadata'?
HTML code
Programming code
Data about data
A link to the image
69
Describe the Execute part of the FDE Cycle
The CPU's control unit works out what the instruction means.
Sending out signals that tells the CPU what to do. Include r/w from/to RAM
get an instruction from main memory.
70
The larger the sample size...
...the more accurately the audio can be represented
...the quality of sound is reduced
...the smaller the audio file will be
71
When a computer program needs more memory than what is physically available...
Temporary files are deleted from storage
Unused data in RAM is moved to VM, to make room for data for the program.
The CPU accesses the program directly from VM
72
Which unit of storage is likely to be best for storing a sentence of text?
Kilobyte
Megabyte
Byte
Bit
73
Which of the following are benefits of using lossy compressing video/audio data?
It will take up less storage space
It can be streamed relatively quickly over the internet
It will remove unnecessary data which is unlikely to be noticed
It will increase the fidelity (quality) of the video/audio
74
Black and white bitmap image is 10 pixels wide, 10 pixels high. How much storage space should be allocated to this file?
100 bytes
1 kilobytes
10 bytes
100 bits
75
The purpose of Virtual Memory is to...
Allow programs to run, even if there is insufficient physical memory
Store the operating system
Cache instructions that are processed by the CPU
Store the computer's start-up program
76
A text file contains the text 'hello world'. How many bytes are allocated to storing the text? (ignore overheads).
10
11
16
2
77
All of the following pieces of metadata are
essential
for an image file, except for...
Width
Height
Bit-depth
GPS location
78
Which of the following is
not
performed by the start-up programs stored in ROM?
Allow the user to change settings, such as the 'boot order'
Check to see if all the essential hardware components are connected
Search for and load an operating system
Check for new email since the computer was shut down
79
What is lossless compression?
Unnecessary" data is removed. Original data cannot be restored.
When compressed, no original data is lost. Original data can be restored.
80
Having a very big amount of CPU cache memory will always speed up the fetching of instructions. Is this...
True
False
81
Which unit of storage is likely to be the most appropriate for a 2 megapixel image?
Kilobyte
Megabyte
Byte
Gigabyte
82
What is stored in the program counter?
An address
Text
An instruction
83
RAM is
A processor of data
Non-Volatile
Volatile
84
The pixel data that makes up an image is known as a...
bitmap
image map
binary map
byte map
85
The 'bit rate' of an audio recording is usually measured in...
megabytes per second
bits per second
kilobits per second
kilobytes per second
86
Twisted pair cable is
Two fibre optic cables twisted around each other
Two copper wires wrapped around each other
Two fiber optic cables running side by side
87
A switch is a device that...
Converts analogue signals to digital signals and vice-versa
Repeats packets it receives to all other connected devices
Forwards data frames from one device to another within a single network
Forward and receive data packets from one network to another network
88
Which of the following types of storage would most likely be able to locate a file the quickest?
Magnetic
Optical
Virtual
Solid state
89
Everytime a compressed image file is re-saved...
The image quality increases
The image quality reduces
The image quality stays the same
90
What is the formula for estimating the file size of a bitmap image?
width x height x 8 / 1024
number of pixels
width in pixels x height in pixels x bits per pixel
8 x height x width / 1024
91
A DVD-R is an example of which
type
of storage?
Optical
Magnetic
Solid state
RAM
92
Which buses are used to fetch data from RAM?
242 bus
Address bus
ROM bus
Data bus
93
Describe the Decode part of the FDE Cycle
The CPU's control unit works out what the instruction means.
get an instruction from main memory.
Sending out signals that tells the CPU what to do. Include r/w from/to RAM
94
Metadata stored with image files so that they can be displayed correctly include...
Dimensions
Type of CPU
Memory requirements
Bit-depth
95
How is data stored on a DVD?
Using magnetised/demagnetised elements
Using logic circuits (power is used to turn transistors on or off)
Using lasers to read/write pits/lands
96
Unicode is limited to being able to represent how many characters?
Over 4 billion
Between 1 million and 10 million
1024
256
97
The 'colour depth' used for an image is...
...the total number of pixels in the image
...the number of colours in an image
...the file size of the image
...the number of bits used to represent the colour of each pixel
