What does the memory address register hold?

The address of the instruction about to fetched from memory

Why do computer scientists use hexadecimal?

It shortens long binary strings and makes them easier to understand

What are the features of embedded computers?

Small, low cost, energy efficient

What best describes a computer system?

A system with input, processing, storage and output

What is the purpose of secondary storage?

For long term storage of programs and files

What is the purpose of a CPU register?

To hold instructions the CPU is working with during the current cycle

What is the purpose of cache?

To hold frequently used instructions

Which best defines an embedded computer?

A computer system within a larger, non-computer system

Why might a quad core processor not be 4x faster than a single core?

Not all programs can be run in parallel

What is a device driver?

A small piece of software that enables the OS to work with a peripheral

studbud

Computer architecture J277

25 termsStudBud Administration1,098 plays

Unit 1.1, J277 OCR computer science GCSE

Flashcards25 cardsFPractice quizPHost liveL

Questions 25

Answers

1
How does having a solid state hard drive benefit the performance of a computer?
More robust
Higher capacity
Faster read/write speeds
Cheaper
2
Which is not a common secondary storage technology?
Optical
Magnetic
USB
Solid state
3
What does the memory address register hold?
The address of the instruction about to fetched from memory
The results of any ongoing calculations
The address of instruction to be fetched at the start of the next cycle
The instruction that has just been fetched from memory
4
What is binary?
The code that computers understand
A way of communicating with computers
A system with values of true and false
A number system based on 2
5
Which is not a valid hexadecimal number?
EF
CD
GH
AB
6
What is the denary equivalent of the binary number 1010?
20
1010
5
10
7
What is sometimes referred to as the 'brains' of the computer?
The CPU
The RAM
The Power Supply
The Hard Drive
8
Why do computer scientists use hexadecimal?
It shortens long binary strings and makes them easier to understand
It takes up less space in the computer
It is easy to convert from denary
Computers work faster with hexadecimal
9
Which register is incremented as part of the FDE cycle?
Accumulator
Memory address register
Program counter
Memory data register
10
What are the features of embedded computers?
Easily programmable
Usually more expensive than general purpose computers
Expensive to produce
Small, low cost, energy efficient
11
What are the names of the buses that connect the CPU?
Single and double decker
Address, Control and Memory
Address, Data and Control
Memory, Cache and Core
12
What best describes a computer system?
A mechanical system for calculating
A system made of hardware
A system with input, processing, storage and output
An electronic device
13
If a CPU has a clock speed of 1.8Ghz, how many instructions per second?
1,800
1,800,000,000
1.8
1,800,000
14
Which is not a component of the CPU?
RAM
CU
ALU
Registers
15
The program counter will always hold the correct address to be fetched.
False
True
16
What is the purpose of secondary storage?
To hold frequently used instructions
To hold instructions the CPU is working with during the current cycle
For long term storage of programs and files
To hold programs that are currently in use
17
Where is the instruction held for decoding?
Memory data register
Program counter
Memory address register
Current instruction register
18
How many cores does an octocore processor have?
2
4
8
1
19
What is the purpose of a CPU register?
To hold instructions the CPU is working with during the current cycle
To hold frequently used instructions
For long term storage of programs and files
To hold programs that are currently in use
20
What is the purpose of cache?
To hold instructions the CPU is working with during the current cycle
To hold frequently used instructions
For long term storage of programs and files
To hold programs that are currently in use
21
Which best defines an embedded computer?
A computer system within a larger, non-computer system
An expensive, high end computer
A general purpose computer
A computer that can do lots of different tasks
22
Which is not one of the functions of the operating system?
Enables the hardware of the computer to be used
Manages memory, files and peripherals
Provides a user interface
Provides useful applications
23
Why might a quad core processor not be 4x faster than a single core?
Not all programs can be run in serial
Not all programs can be run in parallel
Some cores might be further from the memory
The cores may have different clock speeds
24
ROM contains the start up instructions for the computer.
True
False
25
What is a device driver?
A small piece of software that enables the OS to work with a peripheral
A program that helps maintain the computer
A program that does something useful for the user
A piece of hardware that you connect to the computer

Computer architecture J277 Flashcards | StudBud