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WorksheetsAQA GCSE Computer Science - 3.4 Computer Systems
Total questions: 50
Worksheet time: 19mins
Name
Class
Date
1.
What is a Boolean?
a)
A data type that is either True or False
b)
A data type that is either True, False, or And
c)
Another name for an integer
d)
A data type that is either -1 or 1
2.
What logic gate is this?
a)
And
b)
Or
c)
Not
d)
Nor
3.
What logic gate is this?
a)
Or
b)
And
c)
Xor
d)
Nor
4.
For which values of A and B will Z be 1?
a)
A: 0, B: 1
b)
A: 1, B: 1
c)
A: 1, B: 0
d)
A: 0, B: 0
5.
In Python, what is the result of:<br /><br />True, True, True == (True, True, True)
a)
True, True, False
b)
True, True, True
c)
True
d)
False
6.
What is the Fetch-Decode-Execute cycle?
a)
The process to ensure instructions in a program are run
b)
A cycle where data is retrieved from the cache
c)
An activity that the CPU does to render graphics
d)
A hacking technique that bypasses secure networks
7.
Which factors affect CPU performance?
a)
Cache memory
b)
Clock speed
c)
Processor cores
d)
Bandwidth size
8.
How many Hertz are in one Gigahertz?
a)
1 x 10^9
b)
1 x 10^12
c)
1 x 10^10
d)
1 x 10^6
9.
What are the benefits of cache memory? Select all that apply
a)
Cache memory can be accessed much faster than main RAM
b)
Cache memory contains frequently used data
c)
Cache memory is small in size
d)
Cache memory has multiple layers
10.
What is the third step in the following options describing the fetch part of the cycle?
a)
The address of the next instruction is fetched from memory
b)
The register points to the next instruction
c)
The address of the next instruction is fetched from the register
d)
The address of the next instruction is put into a register
11.
Which CPU in the following options has the third best performance?
a)
Single core processor at 5GHz with 4Mb cache
b)
Quad core processor at 1.5GHz with 2Mb cache
c)
Octa core processor at 1.7GHz with 3Mb cache
d)
Dual core processor at 2.5GHz with 3.5Mb cache
12.
For which values of A, B, C and D respectively will Z be 1? (The OR gate with a line is the XOR gate, which only returns 1 if inputs are 1 & 0)
a)
0,0,0,0
b)
1,0,1,0
c)
0,1,1,1
d)
1,0,1,1
13.
In Python, what is the result of:<br /><br />True and not (False or (True and False) or not (1 or (1-2+3-4+5)))
a)
True
b)
True, True
c)
False
d)
Maybe
14.
In Python, what is the result of:<br /><br />1 = True
a)
SyntaxError
b)
None
c)
TypeError
d)
NameError
15.
For which values of A, B, C and D respectively will Z be 0?For which values of A, B, C and D respectively will Z be 1? (The OR gate with a line is the XOR gate, which only returns 1 if inputs are 1 & 0)
a)
0,0,1,1
b)
1,1,1,1
c)
1,1,0,1
d)
1,0,0,0
16.
How does Level 2 cache compare to Level 1 cache?
a)
Slower, Larger
b)
Slower, Smaller
c)
Faster, Smaller
d)
Faster, Larger
17.
What is the difference between volatile and non-volatile memory?
a)
Volatile memory loses its contents when it is powered off, whereas non-volatile memory does not.
b)
Volatile memory overheats much more quickly than non-volatile memory.
c)
Volatile memory is made from highly reactive materials whereas non-volatile memory is not.
d)
Volatile memory crashes after a short period of usage whereas non-volatile memory does not.
18.
Which of these is not stored in RAM?
a)
The bootstrap loader
b)
Programs
c)
Data needed by programs
d)
The operating system
19.
What does ROM stand for?
a)
Read Only Memory
b)
Random Only Memory
c)
Random Onset Memory
d)
Return Operating Memory
20.
What is the difference between primary and secondary storage?
a)
Primary storage can be directly accessed by the CPU whereas secondary storage can only be accessed indirectly.
b)
Primary storage is volatile whereas secondary storage is non-volatile.
c)
Primary storage is RAM and secondary storage is ROM.
d)
There is no difference in components, it just depends on how close they are to the CPU.
21.
Which of these operations can be performed on ROM?
a)
Read but not write
b)
Read and write
c)
Write but not read
d)
Read, write and append
22.
Why is ROM needed?
a)
When a computer is turned on, a basic startup routine has to be accessed from a non-volatile source in order to load the OS onto RAM for it to run.
b)
Secure information like passwords and encryption keys need to be safely stored away in ROM.
c)
It's not needed, but we use it often instead of RAM and hard drives because it's cheap.
d)
It is needed to store the OS at runtime.
23.
Which of these operations can be performed on RAM?
a)
Read and write
b)
Read but not write
c)
Write but not read
d)
Neither
24.
Why is the BIOS stored on RAM?
a)
Trick question; it's not.
b)
Access times for RAM are very low, meaning the computer boots up quickly.
c)
The volatility of RAM means that the BIOS runs quicker.
d)
ROM is too small to hold the BIOS, so RAM is used.
25.
Which of these is not a characteristic of the Von Neumann architecture?
a)
Programs are not stored in memory and are input when needed.
b)
Programs are stored in memory.
c)
Instructions are fetched and executed sequentially.
d)
There is a single memory and bus system for accessing both data and programs.
26.
Which one of these components performs logical operations?
a)
The ALU
b)
The CU
c)
The clock
d)
The bus
27.
What is the function of the clock?
a)
It controlls processor timing and synchronises the CPU operations.
b)
It keeps track of the time of day in non-volatile memory so that time is always tracked.
c)
It times how long CPU operations take for data collecting by manufacturers.
d)
It counts how many times the data and address bus are used.
28.
Which of these operations does the Control Unit not perform?
a)
Arithmetic operations
b)
Decoding of instructions
c)
Regulating and controling of processor timing using the clock
d)
Ensuring instructions are executed in the right order
29.
Which of these is not a component of the processor?
a)
Trick question; they're all components.
b)
The Arithmetic Logic Unit
c)
The clock
d)
The bus
30.
Which of these is not part of the system bus?
a)
Clock bus
b)
Address bus
c)
Control bus
d)
Data bus
31.
What is a bus?
a)
An internal connection along which instructions and data move between memory and the processor.
b)
A power connection between the CPU, the motherboard and the power supply.
c)
A cable linking the CPU to the GPU, allowing them to synchronize their operations.
d)
A 4 wheeled form of public transport
32.
What does the program counter hold?
a)
The address of the next instruction to run
b)
The number of times a single program has been run
c)
The number of programs currently used
d)
The number of programs opened in the current usage session
33.
What is a shift operation?
a)
Moving the bits of a piece of data left or right by a certain amount.
b)
Moving a piece of data from one register to another.
c)
Moving a program from secondary storage onto RAM
d)
Moving a program instruction from a register to the CU.
34.
Which of the following is the full form of API?
a)
Application Program Inteface
b)
Application Programming Interpreter
c)
Access Point Input
d)
American Petroleum Institute
35.
What is meant by I/O?
a)
Input/Output
b)
Information Operations
c)
Information/Output
d)
Inlet/Outlet
36.
What is the purpose of the bootstrap loader?
a)
A small program used to load the operating system
b)
A small program used to load the BIOS
c)
Stores user data and which is then booted up when needed to be accessed
d)
Controls the execution of instructions and ensures that the correct programs are booted and loaded when required
37.
Which of the following is not an optical media device?
a)
Hard disks
b)
CD
c)
DVD
d)
Blu-Ray
38.
How many formats do CDs come in?
a)
3
b)
2
c)
4
d)
1
39.
Which of the following has the fastest access speeds?
a)
Blu-Ray
b)
DVD
c)
CD-ROM
d)
CD-R
40.
Which of these does Secondary Storage not refer to?
a)
ROM
b)
HDDs
c)
Optical Disks
d)
SSDs
41.
Which of the following states the two types of flash memory available?
a)
NOR, NAND
b)
NOR, NOT
c)
NOT, NAND
d)
NOS, NOR
42.
What technology do Optical Disks employ on?
a)
Pits and Lands
b)
Flash memory
c)
Magnetic disks
d)
Core processing
43.
Which of these is generally cheapest per GB?
a)
Magnetic
b)
Solid State
c)
Optical
d)
DVD
44.
What are the two main types of compression that compression software employs on?
a)
Lossy, Lossless
b)
Run length encoding, Lossy
c)
Discrete Cosine Transform, Fractal compression
d)
Losing, Lost
45.
Which of these is a disadvantage of Optical media?
a)
Can be easily damaged by excessive sunlight or scratches
b)
They are reliant on magnetic properties and so are affected by magnetic fields
c)
They contain moving parts and thus can be easily damaged when carried or dropped
d)
None of the others
46.
Which of the following is not an advantage of cloud storage?
a)
It can be accessed independent of whether the user has an internet connection or not
b)
You can access the data stored from anywhere in the word
c)
Your data can be quickly backed up and updated to be accessed from anywhere and any device
d)
Data can be shared easily with people in different locations as well as with high levels of security
47.
Which of the following is true about Solid State Drives(SSD)?
a)
They are often referred to as flash memory / storage
b)
They contain moving parts
c)
They are reliant on magnetic properties and so are affected by magnetic fields
d)
Their access speeds are faster than that of RAM
48.
What is the purpose of utility software?
a)
To improve the quality of life of the user's experience and to provide housekeeping functionality
b)
To automatically download software updates for the OS
c)
Sets different access rights and privileges for different users
d)
To allow for easier connections between applications and external devices
49.
What is the purpose of disk defragmentation?
a)
Groups separate parts of files and also free disk space, allowing for quicker access times
b)
To remove all unneccesary programs and compress those which which are above a certain size
c)
The partitioning of the file system into zones / groups based off of which parts experience more reads and writes than others
d)
The breaking up of files into fragments so that each individual segment takes up less overall space
50.
What is meant by the term "embedded systems"?
a)
Devices which make use of and contain microprocessors / CPUs to control their function
b)
Systems that control access to a machine, hence embedding authority
c)
Systems which allow for easy accessibility with other pieces of software and devices
d)
A small program that acts as an interface between the computer and the device
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