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Worksheets3rd form EOY
Total questions: 86
Worksheet time: 52mins
Inside the CPU, you will find:
ALU, CU, registers, cache memory
ADU, PC, storage, RAM memory
ARM, PC, controller, cache memory
APM, CU, time signal, RAM memory
The ALU....
does any maths or logic problems for the CPU
stores data inside the CPU
sends out control signals for the CPU
holds specific data for the fetch-decode-execute cycle
The CU...
does any maths or logic problems for the CPU
stores data inside the CPU
sends out control signals for the CPU
holds specific data for the fetch-decode-execute cycle
The cache memory...
does any maths or logic problems for the CPU
stores frequently used instructions close to the CPU
sends out control signals for the CPU
holds specific data for the fetch-decode-execute cycle
The registers...
do any maths or logic problems for the CPU
store data inside the CPU
send out control signals for the CPU
hold specific data for the fetch-decode-execute cycle
The MAR stores the (a) of data which is either being sent to or fetched from the RAM.
The MDR holds the (a) which is being sent to/fetched from the address in the MAR.
The PC holds the address of the next (a) which will be fetched.
The PC is (a) by 1 at the end of each fetch-decode-execute cycle.
The ACC holds the result of any processing by the (a) .
The main purpose of the CPU is to run the _____-______-_______ cycle.
Please include the hyphens in your answer
(a)
The first stage of the Fetch-Decode-Execute cycle is:
The next instruction is fetched from the RAM
The instruction is decoded so that it can be done
Any processing is done using the ALU
The PC is incremented
The second stage of the Fetch-Decode-Execute cycle is:
The next instruction is fetched from the RAM
The instruction is decoded so that it can be done
Any processing is done using the ALU
The PC is incremented
Select the registers which hold memory addresses. [2]
RAM
MDR
ACC
PC
MAR
Select the registers. [3]
ALU
MDR
ACC
PC
CU
To get data from RAM, memory addresses are sent from the CPU down the...
bus.
registers.
ROM.
cache.
Select the components of the CPU. [2]
CU
ALU
ACC
ROM
PC
If the number of cores goes up from 2 to 4, what is the exact effect on performance?
The maximum number of instructions executed per second is halved
The maximum number of instructions executed per second doubles
The maximum number of instructions executed per second quadruples
Performance decreases
If the processing speed goes up from 1GHZ to 4GHZ, what is the exact effect on performance?
The maximum number of instructions executed per second doubles
The maximum number of instructions executed per second is halved
The maximum number of instructions executed per second quadruples
The maximum number of instructions executed per second is quartered
What doesn’t affect the performance of the computer?
Number of cores
Cache size
Clock speed
The number of instructions in the program
If the speed goes from 2GHZ to 4GHZ & cores goes from 2 to 4, what is the exact effect on performance?
The maximum number of instructions executed per second doubles
The maximum number of instructions executed per second is quartered
The maximum number of instructions executed per second is halved
The maximum number of instructions executed per second quadruples
If the speed goes from 1GHZ to 4GHZ & from an 8 core to a dual core processor, what is the exact effect on performance?
The number of instructions executed per second quadruples
The number of instructions executed per second doubles
The number of instructions executed per second quadruples
The number of instructions executed per second stays the same
Firmware in which software and hardware are integrated on a circuit board is known as:
Desktop system
Operating system
Embedded system
Point of Sales system
Which one is an example of an embedded system?
PC
Tablet
Laptop
Washing machine
Firmware refers to..
A combination of hardware and software
A type of software that is updated to make a computer work better
Any hardware that can’t easily break
Hardware used in kitchens
Which one is a characteristic of an embedded system?
Usually has a complex operating system
A desktop PC is a good example
Used for specialised tasks
Can perform custom tasks
Which one is a characteristic of an embedded system?
Has many cores
Easy to update
A single microprocessor including RAM,ROM and a CPU
Anyone can program
Question 3: Which of these is NOT an advantage of a Network? (1-4)
Shared files and resources
Less vulnerable to hackers
Data can be shared across a range of users
User accounts can be created
Question 1: What network has the server placed in the centre and the devices
around it? (1-4)
Ring
Bus
Star
Mesh
Why is secondary storage needed?
Because it can hold data that can be easily accessed.
Because it can hold data that can be quickly processed.
Because it can hold data that can be easily modified.
Because it can hold data that can be retained when switched off.
Which characteristic measures the resistance of a storage device to external factors?
Cost
Reliability
Durability
Capacity
Which characteristic measures the cost per GB of a storage device?
Cost
Reliability
Durability
Capacity
Which characteristic measures the rate at which data can be read and transferred from a storage device?
Cost
Reliability
Durability
Speed
Which characteristic measures how well a storage device performs over a long period of time?
Cost
Reliability
Durability
Capacity
Which of the following is an advantage of Solid State Storage?
It has spinning disks to read the data
The storage device is lightweight and silent
SSDs are very cheap to buy and have lots of storage
'A laser is shone onto the disc and the light is reflected based upon whether it hits a pit or land' describes which storage device?
Cloud storage
Optical storage
Magnetic storage
Solid State storage
Which of the following describes the functionality of solid state storage?
Traps electrons behind blocks of floating gates
Spinning discs are read using a read-write head
Access is only possible if you have a connection to the internet
Has a series of pits and lands that reflect light to a sensor
Which of the following storage devices is most suitable for use in mobile devices?
Cloud
Magnetic
Solid State
Optical
Choose the most appropriate storage device for an all terrain camera crew tracking lions across Africa...
Cloud Storage
Solid State Storage
Magnetic Storage
Optical Storage
A computer has 1000 megabytes of RAM. That is the same as ...
1 Gb
1000 Gb
1 Kb
1 Tb
It's cheap
It cannot be easily expanded
Which number base is Binary?
10
2
16
Which of the following units is the smallest in terms of size?
Kilobyte, Megabyte,Nibble.
Kilobyte
Megabyte
Nibble
Convert the following denary number into binary(11).
0011
1011
1100
1010
Convert the following denary number to binary (9).
1010
1011
1001
0111
Convert the following denary into binary (21)
0001 0101
0011 0101
0111 0111
0100 0101
Convert the following denary into binary (100).
0111 0100
0110 0100
0101 100
0110 1100
Convert the following binary number to denary (0000 1111).
15
12
10
8
Convert the following binary number to hexadecimal (1001 1111)
8d
8e
9e
9f
Add the following nibbles together and select the correct answer from the list below. (1110 + 0010). Answer will be expressed in 4 bits.
0001
0000
10000
1001
Convert the hex value A5 to binary
10101010
00011111
01011010
10100101
A sound file's size is increased by
A greater bit depth
Lossy Compression
Higher sample frequency
The volume of the sound
Analogue sound waves are digitised in a process known as (a)
What is the decimal equivalent of hexadecimal value 'D'?
11
10
13
14
Convert Denary into Binary:
254
1111 1100
1110 1111
1010 0101
1111 1110
Which of these components is usually built in to a laptop and is required to connect the computer to a network?
Wireless Access Point
Network Interface Card
Switch
HUB
What is meant by latency in the performance of a network?
The time delay of data travelling 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
Which of these is a characteristic of a LAN?
It covers a wide geographical area.
Computers are connected together using leased lines or satellites.
Users can share files and peripherals.
Data can only be transmitted at a very slow rate.
What problem can occur through using cloud computing?
There can be privacy and security issues
More hardware needs to be added to a company network to store data
Only a small amount of data can be stored
Only a small amount of software can be stored
Which of these is a benefit of cloud computing?
It can reduce costs for a company as they do not need to buy additional hardware to store data
It is the cheapest option for a company to store their data as they do not need to pay for cloud computing
Data can be accessed anywhere as an internet connect is not needed to access data and software stored in cloud computing
Data will always be more secure in a cloud computing system
Priya is considering storing her project data on cloud storage instead of her PC. What advantage would this offer her?
Faster processing speed
No need for internet connection
Ability to access information from any device
Higher security
Arjun, Benjamin, and Elsie are setting up a home network. What would be the main function of a router in their setup?
To provide cloud storage for their files
To convert the website names they type into IP addresses
To connect their devices to the internet
To store the web pages they visit
Lily, Anaya, and Elsie are setting up a home network. They need a device to connect their computers to the network. What is another name for this device, also known as a network interface controller?
Network interface card
Switch
Router
Wireless access point
Select all the TRUE statements:
A peer-to-peer network has one central controlling computer.
Peer-to-peer networks are easier to set up than client-server networks
Peer-to-peer networks allow individual devices to share files between each other.
Peer-to-peer networks are commonly used in large organisations
It is easier to implement security procedures throughout a client server network than a peer to peer network.
Kiara, Harry, and Mia are setting up a computer network for their school's computer lab. They decide to use a star network topology. What is the main advantage of their chosen network topology?
It poses a low security risk
It provides high bandwidth
If there's a break in one connection, it only affects one computer
It requires less cabling
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
Which type of server translates Web Addresses to IP addresses?
Web Server
E-mail Server
DNS Server
RTP Server
Which of the following is a domain name (only)?
https://google.com
google.com
https://www.google.com/search?q=cats
https://
Which protocol is commonly used for sending emails?
HTTPS
IMAP
FTP
SMTP
Which two are advantages of using layers in the TCP/IP model?
They provide interoperability between hardware and software vendors
Vendors have to work on every layer to provide functionality
One layer can be changed without affecting the functionality of other layers
They can send data in a single large file across the internet
There are a range of standard protocols used by applications such as web browsers and email clients. These are rules (NOT instructions). Match them:
FTP
File Transfer Protocol
POP
Post Office Protocol
HTTPS
Hypertext Transfer Protocol Secure
IMAP
Internet Message Access Protocol
SMTP
Simple Mail Transfer Protocol
(a) defines the rules for sending email messages from a client to a server, and then from server to server.
(b) allows multiple devices to have synchronised access to mail on a mail server.
(c) is used by a client to retrieve emails from the mail server. The emails are usually downloaded to the device then deleted from the server.
TCP/IP stands for (a) / (b) .
TCP (c) from applications into smaller data packets that can be sent across a network.
IP (d) to each data packet including the source and destination IP addresses.
Protocols are assigned to layers. The advantages of layers are:
1) One layer can be (a) without affecting the other layers.
2) Enables hardware/software manufacturers to develop products that (b)
3) Easier to (c) networking errors and problems.
