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WorksheetsYear 9 Summer 2023 (2)
Total questions: 38
Worksheet time: 22mins
What does Pixel stand for?
Picture Element
Picture Square
Picture Lighting
Picture Line
A picture with ____ pixels has higher quality.
More
Less
Bigger
Circular
What does colour depth mean?
Number of bits for each pixel
Number of colours for each pixel
Number of colours in the image
Number of pixels in an image
With 3 bits for each pixel, how many colours can the pixel display?
3
6
8
9
An image where each pixel can display 32 different colours would need how many bits for each pixel?
32
16
5
2^32
Select the three primary colours for computer displays.
Red
Green
Blue
Yellow
Cyan
What is the colour depth in bits for a True Colour image (enter a number only)?
(a)
The metadata for an image has the width and height in that order using 4 bits for each. The image is 13 pixels wide and 14 pixels tall. Enter the binary for the metadata.
(a)
What is the correct expression for the size of an image in KibiBytes? The width is w, the height is h and the colour depth is c.
(w x h x c) / (8 x 1024)
(w x h x c) / 1024
(w + h + c) / 1024
(w + h + c) / (1024 + 8)
What is the correct expression for the size of an image in MebiBytes? The width is w, the height is h and the colour depth is c.
(w x h x c) / (8 x 1024 x 1024)
(w x h x c) / (1024 x 1024)
(w + h + c) / 2048
(w + h + c) / (1024 x 8)
Which of these is not a type of compression algorithm?
Lossy
Lossless
Approximate
Does a Lossy or Lossless compression algorithm achieve higher compression? (type one word)
(a)
Does a Lossy or Lossless compression algorithm allow the original data to be recovered? (type one word)
(a)
Is JPEG a Lossy or Lossless compression algorithm? (type one word)
(a)
What type of validation check will ensure a number is between two values?
Range check
Length check
Presence check
Pattern check
What type of validation check will ensure a string does not have too many or too few characters?
Range check
Length check
Presence check
Pattern check
What type of validation check will ensure a value is entered?
Range check
Length check
Presence check
Pattern check
is RAM primary storage or secondary storage?
Primary
Secondary
is SSD primary storage or secondary storage?
Primary
Secondary
Which type of storage can be accessed directly by the CPU?
Primary
Secondary
Cloud
What word, in relation to computer memory, means to lose its contents when the power is turned off? (enter one word)
(a)
What format are data and instructions stored in, in computer memory?
Binary
Hexadecimal
Text
Code
What type of device is a mouse?
Input
Output
Input & Output
Neither Input or Output
What type of device is a speaker?
Input
Output
Input & Output
Neither Input or Output
What type of device is a touchscreen?
Input
Output
Input & Output
Neither Input or Output
What type of device is RAM?
Input
Output
Input & Output
Neither Input or Output
Which of these is NOT an advantage of connecting devices into a network?
Allows sharing of printers
Allows sharing of files
Cheaper than having separate computers
Allow central backup and management
Which of these is NOT a disadvantage of connecting computers into a network?
Additional hardware, wiring and management is expensive
Allows malware to spread more easily
Cannot control the computers as easily
What is the network topolgy where all devices are connected to a central switch? (type one word)
(a)
What is the network topolgy where each device is connected to many other devices? (type one word)
(a)
What piece of networking hardware directs packets towards their destination using the IP address in the packet header?
Router
Modem
Wireless Access Point
Server
Which of these is NOT a piece of metadata in an internet packet header?
Sender IP Address
Destination IP Address
Checksum
Packet Number
Date
Which of these would NOT defend a network from a physical attack?
Locks on server room doors
CCTV
Security guards
Firewall
Which of these would NOT defend a company from a malware cyberattack?
Firewall
Anti-virus software
Backups
Strong passwords
Convert 1010 0101 from binary to hexadecimal
(a)
Convert 101100 from binary to hexadecimal
(a)
What is 131 in binary?
1000 0011
1000 0010
1000 0110
0111 1111
What is 0xDAB in binary?
1101 1010 1011
1101 1010 1001
1101 1001 1011
1100 1010 1011
