WorksheetsDedgecombe - cs-quiz
Total questions: 80
Worksheet time: 42mins
what does the control unit do?
sends signals to direct the operations
performs mathematical operations
keeps the clock in sync
high speed memory inside the processors
whats the missing word?
von (a) architecture
what is clock speed?
the number of instructions a processor can carry out per/second
the speed the internal computer clock goes
how quick a computer can do a calculation
the speed the fan moves in the computer
complete the sentence....
the fde cycle stands for fetch, decode, (a)
where is the program counter?
accumulator
cpu
ram
rom
which of these is not in the cpu
program counter
ram
accumulator
mar
____ decode execute
fold
find
feel
fetch
cu stands for (a) unit
what is an embedded system?
a large device built into another device.
a small device built into a larger device to perform a specific task.
a large device that can perform many tasks.
a computer chip in a mattress
which of these is smallest
byte
MB
bit
nibble
A trojan would typically...
hide on USB memory sticks.
be disguised as an email attachments.
be disguised as legitimate software.
spread through dodgy web links
Which of the following is most likely to open a “back door” into your computer system through which your personal information can be harvested.
Virus
Trojan Horse
WAN
Worm
passes data over the physical network
transport layer
internet layer
link layer
application layer
encrypts all information sent and received
HTTP
FTP
HTTPS
SMTP
What runs tasks like the operating systems, utilities, etc
Embedded systems
Application software
System software
Dedicated systems
The CPU carries out instructions, one after another, billions of times a second is known as...
The Fetch-Execute Cycle
The Fetch-Decode-Execute Cycle
The Fetch-Breakdown-Execute Cycle
The Fetch-Breakdown-Sign out Cycle
RAM is
Volatile
Non-Volatile
Which of these is NOT a type of compression?
Run Length Encoding
Huffman Coding
Encryption
Lossy
The ALU is found inside the CPU True or False?
True
False
What does the bit rate of a sampled sound refer to?
The number of bits used for 1 second of audio
The number of bits used for every sample
The final file size of the sampled sound
The speed at which the sampled sound is played back
What is the standard sampling frequency for CD audio?
20,000 Hz
44,100 Hz
33,300 Hz
96,000 Hz
In a Von Neumann architecture ...
data and instructions are both stored in main memory.
data and instructions are stored in separate memory devices.
data is stored in main memory, instructions in secondary storage.
data is stored in secondary storage, instructions in main memory.
Select the best description of an embedded system
A general purpose computing system, traditionally with more ROM than RAM.
A computing system with a specific purpose, traditionally with more RAM than ROM.
A computing system with a specific purpose, traditionally with more ROM than RAM.
A general purpose computing system, traditionally with more RAM than ROM.
Which network device forwards data packets between networks?
Router
Client
Server
Modem
Which component holds a MAC address?
Network Interface Card
Router
Macbook
Switch
What is an advantage of this ring network topology
If the central switch breaks it will still work.
The speed of the network remains high as more devices are added.
It does not require much cabling.
Each device is able to communicate with all other devices.
A piece of malware is distributed to disrupt a school network by a rival teacher. Which is the most relevant piece of legislation?
Data Protection Act 1998
Computer Misuse Act 1990
Copyright, Design & Patents Act 1988
Electronics Communication Act 2000
Validation codes to download a game (RRP £50) without cost are illegally generated and distributed. Which is the most relevant piece of legislation?
Data Protection Act 1998
Computer Misuse Act 1990
Copyright, Design & Patents Act 1988
Electronics Communication Act 2000
A teacher accidentally emails a file with all of their students' exam grades and data to a non-work friend. Which is the most relevant piece of legislation?
Data Protection Act 1998
Computer Misuse Act 1990
Copyright, Design & Patents Act 1988
Electronics Communication Act 2000
Are analogue and digital sounds continuous or discrete
Analogue is continuous, Digital is discrete
Both are continuous
Analogue is discrete, Digital is continuous
Both are discrete
What is the file size of a 3-second long recording with a resolution of 4 bits at 8 samples per second?
12 bytes
6 bytes
12 bits
6 bits
What does lossy compression usually do (to audio recordings)?
Remove unecessary sound from outside the range of human hearing.
Leave out repeated data.
Reduce the sample resolution
Reduce the sample rate
What is sample rate?
The number of samples recorded per second
The number of bits used to record each sample
How much data is processed for each sample
How many waves appear
Convert A7 from hexadecimal to denary
176
26
122
167
What is 53 in binary?
01100101
00110101
00011011
01010101
What is 0101 + 0110 ?
1011
0111
1101
1110
A = 1 B = 1 C = 0
What is the final output Y?
0
1
2
3
An electronic device inside a CPU that 'ticks' at regular intervals and is used to synchronise the actions of the other parts of the CPU
Arithmetic/Logic Unit (ALU)
Register
Control Unit
Clock
The part of the CPU that performs calculations and logic operations
Register
Control Unit
Clock
Arithmetic/logic unit (ALU)
Which network topology makes use of a single backbone cable and two terminators.
Mesh
Star
Bus
Ring
Covers a small geographical area on a single site
LAN
PAN
WAN
SAN
If the processing speed goes from 1GHZ to 4GHZ and the processor is changed from an 8 core to a dual core processor – what is the exact effect on the performance of the computer?
The number of instructions executed per second quadruples
The number of instructions executed per second doubles
The number of instructions executed per second stays the same
The number of instructions executed per second is halved
Which is an example of an Embedded System:
PCs
Washing Machine
Laptops
Tablets
What is held in cache?
All of the programming instructions
Instructions that have been processed
Commonly used instructions and data
Data that hasn’t been used for a long time
Programs that a computer system runs is known as....
Software
Hardware
What is a worm?
A malicious program which replicates by injecting its own code into other files
A malicious program which replicates by making copies of itself and filling up RAM and secondary storage sometimes propagating across a network
A malicious program which masquerades as a legitimate program but causes harmful execution when run
A malicious program which encrypts all of the data on a computer system and demands payment in order to decrypt the data
What is a virus?
A malicious program which replicates by injecting its own code into other files
A malicious program which replicates by making copies of itself and filling up RAM and secondary storage sometimes propagating across a network
A malicious program which masquerades as a legitimate program but causes harmful execution when run
A malicious program which encrypts all of the data on a computer system and demands payment in order to decrypt the data
What is ransomware?
A malicious program which replicates by injecting its own code into other files
A malicious program which replicates by making copies of itself and filling up RAM and secondary storage sometimes propagating across a network
A malicious program which masquerades as a legitimate program but causes harmful execution when run
A malicious program which encrypts all of the data on a computer system and demands payment in order to decrypt the data
What type of social engineering attack is shown in the image?
phishing
vishing
smishing
DDOS
Which storage device stores data using magnetic technology?
Solid state
Internal Hard disk
USB
External hard disk
Which storage or memory solution below is used to store the BIOS?
ROM
Secondary Storage
Hard Disk
RAM
What is an advantage of this star network topology
If the central switch breaks it will still work.
The speed of the network remains high as more devices are added.
It does not require much cabling.
Each device is able to communicate with all other devices.
Which of the following character sets holds the most characters?
Unicode
ASCII
Extended ASCII
How is data stored on a HARD DISK DRIVE?
a magnetic charge is applies to sections of a spinning disc, which either attracts or repels a read head, corresponding to 1s and 0s
A laser light scans the surface of the disc and is either reflected or absorbed by pits on the surface, corresponding to 1s and 0s
Carbon nanotubes are arranged in a preconfigured alignment either up/down and left/right, corresponding to 1s ands 0s
A little goblin inside the drive draws prictures and then converts them to 1s and 0s somehow
The range of frequencies that can be transmitted across a network connection is known as...
(a)
What is the denary equivalent of the hexadecimal number D6?
(a)
Convert 0011 1001 into Hexadecimal.
(a)
The processor in Ella’s computer has four cores running at 2.8 GHz and the processor in Josephine’s computer has one core running at 3.2 GHz.
Which computer would be faster at serial processing?
Ella's
Josephine's
Give the full name of RAM.
(a)
