WorksheetsNat 5 Computer Systems Revision
Total questions: 36
Worksheet time: 21mins
What is the binary of 131?
10000011
10000001
10001010
10000111
What is the denary of 01000110?
70
72
77
68
What is the MANTISSA and EXPONENT for this number?
222222.333
Mantissa = .222222333 Exponent = 6
Mantissa = .6 Exponent = 222222333
Mantissa = .2222333333 Exponent = 6
Mantissa = .222222333 Exponent = 5
How does the computer store positive numbers?
Binary
Denary
Mr Roderick is cool
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How does the computer store LARGE or decimal numbers?
Mantissa and Exponent
2D array of Pixels
Ascii
by the attributes of objects
How does the computer store Text?
Mantissa and Exponent
2D array of Pixels
Ascii
by the attributes of objects
How does the computer store Bitmap graphics?
Mantissa and Exponent
2D array of Pixels
Ascii
by the attributes of objects
What are the advantages of BitMap Graphics?
More than 1 option.
File size stays the same
Can edit at pixel level
Can resize and/or zoom in without Pixelation
Resolution Independent
What are the disadvantages of BitMap Graphics?
More than 1 option.
Pixelation happens when resize or zoom in
File size increases when add more to the image
Cannot relayer objects
Resolution Independent
What are the advantages of Vector Graphics?
More than 1 option.
No Pixelation when resize or zoom in
File size increases when add more to the image
Can relayer objects
Edit at pixel level
What are the disadvantages of Vector Graphics?
More than 1 option.
No Pixelation when resize or zoom in
File size increases when add more to the image
Can relayer objects
Cannot edit at pixel level
How many characters can 7-bit ASCII code represent?
128
127
7
77
Which of these are NON-printable characters?
More than 1.
7 = beep
27 = escape
13 = return/ enter
32 = space
Which of these are Printable characters?
More than 1.
65 = A
97 = a
7 = Beep
27 = Escape
What does CPU stand for?
Central Processing Unit
Computer Process Unit
Central Putting Unit
Central Processing Unity
What does ALU stand for?
Arithmetic Logic Unit
Arithmetic Legal Unit
Arithmetic Logic Unity
Array Logic Unit
What does CU stand for?
Control Unit
Control Unity
Central Unit
Cooling Unit
What does the ALU do?
Calculations and Decision Making
Digital drawings
Provides sound quality
Harmonises the chips
What does the CU do?
Synchronises or coordinates all the processes in the CPU
Decisions and calculations
Controls the Monitor
Plays music
What is the function of a register?
Fast Temporary storage for data and instructions
Slow Temporary storage for data and instructions
Fast Temporary store for the date and time
Slow Temporary store for the date and time
What is the function of the data bus?
Carry data and instructions to and from CPU and Memory
Carry data and instructions to the CPU
Carry data and instructions to Memory
Carries the address location in memory
What is the function of the address bus?
Carry data and instructions to and from CPU and Memory
Carry data and instructions to the CPU
Carries the address location to and from CPU and Memory
Carries the address location in memory
What is meant by encryption?
Changing the way data looks
Encasing data to protect it
Spliting data
Deleting data
What is a firewall and its function?
Software/ hardware to control the flow data, websites, ip address in and out of a computer in a network
A wall of fire
A wall in the circuit boards to prevent overheating
Cooling system to prevent the cpu from over heating
What can you do to help the environment?
More than 1.
Reduce brightness
Switch off peripheral devices
Turn screen off after set time
Computer sleeps after set time
What data makes use of encryption?
More than 1.
Sensitive data
Emails, texts
bank details/ online payments
Writing an essay
How does the the computer know where to find data in memory?
Every location in memory has a unique address
Memory lights up
Randomly chooses
My brain is full. Can I go home now?
What is RAM?
Random Access Memory
Random Available Memory
Random Access Motherboard
Radical Access Memory
What is ROM?
Read Only Memory
Random Only Memory
Read Only Motherboard
ROM is the name of the first computer system
What are 4 objects that can be drawn in a DRAW/ Vector graphic package?
Ellipse, Rectangle, Polygon, Line
Circle, Square, triangle, hexagon
Tree, smiley face, sad face, pizza, cake
Object 1, object 2, object 3, object4
What are the attributes which are used to store objects in a DRAW/ Vector graphic package?
more than 1
Start and end drag coordinates
Line colour
Fill colour
Which of these is true for an Interpreter?
More than 1
FInds mistakes as you type
Translates and then executes line by line
Needs to be in memory
Used when developing a program
Fast at running programs with loops/ repetitions
Which of these is true for a Compiler?
More than 1
Displays mistakes after translation
Translates whole program and then executes the instructions
Needs to be in memory
Used at end of developing a program to make an executable file (.exe)
Faster at running/ executing a program with loops
How are Vector graphics stored?
By the Attributes of the objects
2D array of pixels
Vector Code
Vec coordinates
What is RAM used for?
All programs and data must be loaded in RAM to work
Making CDs work
Contains instructions to load the Operating System
Stores permanent data
What is ROM used for?
All programs and data must be loaded in RAM to work
Making CDs work
Contains instructions to load or BOOT UP the Operating System
For use in the future
