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WorksheetsYR 11 Nov PPE Revision
Total questions: 79
Worksheet time: 41mins
Processors have a speed measured in...
Hertz
Bits
Bytes
Seconds
Data and instructions in use are stored in the...
Processor
Embedded System
Hard Disk Drive
Main Memory
A typical processor speed in 2016 was...
16Hz
100MHz
4GHz
300GHz
Which of these does not affect CPU performance?
Clock Speed
Number of Cores
Cache Size
Number of Instructions in a Program
If the number of cores goes from dual-core to quad-core, what effect does this have on performance?
Performance decreases
The maximum number of instructions executed per second doubles
The maximum number of instructions executed per second quadruples
The maximum number of instructions executed per second halves
If the processing speed goes from 1GHz to 4GHz, what effect does this have on performance?
The maximum number of instructions executed per second doubles
The maximum number of instructions executed per second quadruples
The maximum number of instructions executed per second halves
The maximum number of instructions executed per second quarters
If the processing speed goes from 2GHz to 4GHz, and we go from dual-core to quad-core, what effect does this have on performance?
The maximum number of instructions executed per second doubles
The maximum number of instructions executed per second quadruples
The maximum number of instructions executed per second halves
The maximum number of instructions executed per second quarters
Processors can't...
Process data
Execute instructions
Execute data
Operate in Hz
The part of the processor where instructions are executed is known as the...
Core
Centre
Execution
Instruction Centre
What acts as an intermediary between the processor and main memory?
Bus
User
Cache
Clock
What is held in cache?
All programming instructions
Commonly used instructions and data
Instructions that haven't been processed
Data that hasn't been used recently
Which component holds the address of the next instruction?
Memory Address Register
Memory Data Register
Program Counter
Accumulator
Where are results of calculations held?
Memory Address Register
Memory Data Register
Program Counter
Accumulator
Which register holds instructions/data temporarily after it is brought to the processor from main memory?
Memory Address Register
Memory Data Register
Program Counter
Accumulator
Which register holds the number of the current instruction being worked on?
Memory Address Register
Memory Data Register
Program Counter
Accumulator
Where would the operation "AND" be performed?
Arithmetic Logic Unit
Accumulator
Cache
Control Unit
Where would a signal such as 'Memory Read' be sent from?
Arithmetic Logic Unit
Accumulator
Cache
Control Unit
Where would 5 + 8 be performed?
Arithmetic Logic Unit
Accumulator
Cache
Control Unit
Which of these don't happen during the fetch part of the fetch-execute cycle?
Address Bus is used
Program Counter incremented
Arithmetic Operations performed
Main Memory addressed
What is the purpose of the accumulator?
To perform arithmetic operations
To hold the results of a calculation
To hold the accumulation of instructions
To store calculations in memory
What happens to the data in RAM when the electricity is turned off?
The data from the memory is saved onto virtual memory
The data from the memory is saved onto the hard disk
The data from the memory is not saved
The data from the memory is saved onto ROM
Virtual memory is stored on/in the...
RAM
RAM
Hard Disk
ROM
Where is the BIOS stored?
RAM
Cache
Hard Disk
ROM
Where would actively used data and instructions be mostly stored?
RAM
Cache
Hard Disk
ROM
computer continually uses its virtual memory. Why might this be?
There is not enough RAM
The cache is too slow
The virtual memory is too small
The hard disk is too slow
Which of the following is not a type of storage?
Optical
Magnetic
Solid State
Hard Drive
What type of storage is a DVD ROM?
Optical
Magnetic
Solid State
It is not a storage device
What type of storage is a USB memory stick
Optical
Magnetic
Solid State
It is not a storage device
What type of storage is a HDD?
Optical
Magnetic
Solid State
It is not a storage device
What type of storage is a SSD?
Optical
Magnetic
Solid State
It is not a storage device
Question 6: Which of the following types of storage would usually have the faster read/write
speed?
Optical
Magnetic
Solid State
It is not a storage device
Which of the following types of storage is the most durable?
Optical
Magnetic
Solid State
It is not a storage device
Which of the following types of storage is usually the most expensive per MB/GB?
Optical
Magnetic
Solid State
It is not a storage device
Why is a Hard Disk Drive (HDD) more likely to break if moved?
It has moving parts
It is too large
It will break if you touch it
It is too small
Why does a laptop need secondary storage?
To reduce the amount of virtual memory it needs
To store data, files and software for future use
To make the laptop run faster
To store data that the processor needs
Which type of storage uses lasers to write the data?
Optical
Magnetic
Solid state
All types
The typical read/write speed of storage are listed below from fastest to slowest.
Which order is correct?
Optical, Magnetic, Solid State
Solid State, Optical, Magnetic
Magnetic, Optical, Solid State
Solid State, Magnetic, Optical
The types of storage are listed below from the most reliable to the least reliable.
Which order is correct?
Solid State, Optical, Magnetic
Optical, Magnetic, Solid State
Magnetic, Optical, Solid State
Solid State, Magnetic, Optical
How many bytes are there per ASCII character in a text file?
0.5
1
1.5
2
Which is the smallest of these data capacities?
2 KB
2049 bytes
0.5 MB
3 GB
Which is the largest of these data capacities?
2048 MB
2 GB
2050 MB
100000 KB
Which formulae can be used to estimate the file size of a sound file?
bytes per sample channels height + number of minutes
samples per second * number of seconds
samples per second bytes per sample duration
samples per second bit depth duration
What numeric base does binary operate on?
2
1
8
16
What is the minimum number of bits needed to represent 15 in denary?
6
4
What is the 8 bit binary representation of 17?
00010010
00010001
00001101
00100010
What is the denary representation of this 8 bit number? 01001111
59
79
69
49
What is the 8 bit binary representation of 32?
00100000
00100100
00110000
00100001
What is the denary representation of this 8 bit number? 11010101
199
206
228
213
How Bytes are there in a Terabyte?
1024 Kilobytes
1024 Megabytes
1024 Gigabytes
Why do we use the binary number system in Computing?
Because a CPU has two transistors
To represent the two different states of transistors
To allow the CPU to be in one of two states
How many bits are used to represent a character in ASCII?
16
1
4
8
How many Bytes per character are used in Unicode?
8
16
1
2
ASCII code is represented by using 16 bits per character.
True
False
ASCII code is represented by using 16 bits per character.
True
False
he ASCII character set is capable of representing non-Western languages.
True
False
Upper and lower case letters (e.g. A and a) have a different ASCII code. (
True
False
What is the maximum number of characters that can be represented using 8-bits?
255
256
65,536
127
A character set is…
All of the languages used in a computer system
All of the fonts that a computer has installed
All of the possible characters that can be represented by a computer system
ASCII can represent more characters than Unicode.
True
False
ASCII Stands for
American Standard Code for Information Interchange
American Scientific Code for Information Interchanging
A
Absolute Standard Codes for Instruction Interchange
What do we call the smallest unit of data that can be represented in an image?
Pixel
Dot
Colour
Bit
What is meant by colour depth? (
Number of pixels in the image
The number of colours available for each pixel
How pixelated the image is
If you increase the colour depth the file size will decrease.
True
False
How many colours can be represented with a 4 bit colour depth?
2
4
16
256
What is often stored with an image?
Microdata
Metadata
Megadata
What unit is sample rate measured in?
Bits per second (bps)
Hertz (Hz)
Megabits per second Mbps
Bits per second (bps)
Hertz (Hz) ü
Megabits per second (Mbps)
Which of the following is not true if you increase the sample rate? (
Better quality of recording
Needs greater storage space
The compression rate increases
Decrease in quality
What is meant by the term bit depth?
The number of samples taken per second
The amplitude of each sample
The number of bits used per second of audio
The number of bits used to store each sound sample
What is measured when the wave is sampled?
Amplitude
Hertz
Bit rate
Frequency
If you increase the bit depth of an audio file, you increase the quality.
True
False
The amplitude of a sound wave is…
he height of the wave
The frequency at which it is sampled
The speed at which it travels through air
The sound’s frequency
The sound’s frequency
What is compression?
Converts one file to another
Reduces the size of a file to save space
Minimizes the time taken for a file to be downloaded
Increases transmission speeds
What does Lossy Compression do to files?
Increases the file size and keeps the same quality
Increases the file
Eliminates no data at all
Decreases the file size and keeps the same quality
Eliminates unnecessary data in a file to reduce file size
What is Lossless Compression?
No information is lost but file size is increased
There is no loss in information at all after compression ü
Files which have the exact same data after compression
An algorithm that stops data being deleted
What type of compression would you use to compress a video and keep the
quality?
Loss
Lossless
What type of compression is most appropriate to compress a text file?
Lossy
Lossless
hat type of compression does the ZIP format use?
Lossy
Lossless
What type of compression will remove some of the data?
Lossy
Lossless
Which of the following are not usually in a compressed format?
JPEG
MPEG
Bitmap
MP3
