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OCR Computing F451 3.1.4 Flashcards | StudBud
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OCR Computing F451 3.1.4
OCR Computing F451 3.1.4
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1
Which device would you use to create a set of architectural plans?
Actuator
Plotter
Printer
Screen
2
What are the two functions of the memory address register (MAR)?
Stores the last instruction AND the memory address accessed
Stores the next instruction AND next memory address
Allows multiple instructions to be synchronised by threading
Store the address being accessed AND the next address
3
Which is not a possible form of backing store (secondary storage)?
Hard disc
DVD-RW
CD-ROM
USB memory stick
4
Parity relies on having odd or even numbers of 1's. Which is the odd one out?
11000110
10101110
10111010
11010010
5
What is a buffer?
An area of memory between fast and slow devices
Memory that is never filled
What stops trains crashing into the platform
A spool file
6
What is a LAN?
Normal Stanley Fletcher
Local Area Network
Likely access node
Lanky armed nobody
7
What does the arithmetic & logic unit (ALU) not do?
Carries out logical instructions
Carries out mathematical calculations
Controls the sequencing of instructions
Decides which instruction comes next
8
Different files need different bit rates. Which file can cope with a slow bit rate?
Text file
Streaming media
Image file
High definition sound
9
What does RAM stand for?
Really Active Meatballs
Random Access Memory
Random Acts of Mirth
Really Accurate Mnemomics
10
What is not a function of the memory unit?
Storage of applications software
Storage of data yet to be accessed
Storage of the operating system
Storage of data being processed
11
Why do we use serial transmission?
Cheap
Slow
Reliable
Simple
12
What is a register?
Something that you put cash in
The part of SIMS that says if you are present or absent
Memory that sits between fast and slow devices
A small piece of high speed memory
13
Which is a disadvantage of microwave communication?
Line of sight communication only
Very expensive to implement
Used by big multi-site firms
Uses big satellite dishes
14
Which is the odd one out?
Data
Electrical
Control
Address
15
What does the control unit do?
Coordinates the processing
Coordinates memory access
Coordinates the execution of instructions
Makes sure that the machine is behaving
16
What does the program counter (PC) do?
Stores the address of the next instruction
Knows how many instructions are to follow
Controls the sequence of the instructions
Keeps the processing in sync
17
What is not a reason to use RAM
More of it gives bragging rights over your friends
It's really quick
It's needed for the machine to operate
It's volatile
