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Computer Science > Summer Exam > Flashcards

Summer Exam Flashcards

1
Q

What is an algorithm?

A

An algorithm is a list of steps you give to computers to solve a problem or get something done.

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2
Q

What is a flowchart?

A

A flowchart is a diagram depicting a computer algorithm.

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3
Q

What shape do flowcharts use for the start and stop?

A

Curved rectangle

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4
Q

What shape do flowcharts use for inputs and outputs?

A

Parallelogram

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5
Q

What shape do flowcharts use for decisions?

A

Diamond

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6
Q

What shape do flowcharts use for processes?

A

Rectangle

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7
Q

How is it different giving instructions to a computer than giving instructions to a human?

A

Because a computer can only use the information you tell it: the instructions have to be very precise and detailed, whereas humans can understand short instructions.

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8
Q

What is a computer programme?

A

A computer programme is a series of instructions to tell a computer exactly what to do and how to do it.

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9
Q

What is a variable?

A

The value that changes in a programme, eg. The score or the timer.

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10
Q

What are sequences?

A

A series of coded instructions that tell the computer what to do.

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11
Q

What are loops?

A

A loop is a sequence of instructions that is repeated for a specified number of times or until a particular outcome is reached.

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12
Q

What are if statements?

A

If statements are used to let a program select an action depending upon the value of variables held in the program.

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13
Q

Count to 5 in binary

A

0001
0010
0011
0100
0101

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14
Q

How do computers use binary?

A

Computers use electrical signals that are on or off, so they have to see everything as a series of binary numbers.

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15
Q

what is the difference between analogue and digital technologies?

A

Digital technology converts information into binary, Analogue technology doesn’t.

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16
Q

What does it mean to digitise information?

A

Digitising information is the process of converting information into a digital format.

17
Q

What does virtual mean in the context of Digital Technology?

A

A digitally replicated version of something real.

18
Q

Roughly, how much space do you need to store a word document?

A

30KB

19
Q

Roughly, how much space do you need to store a picture?

A

4MB

20
Q

Roughly, how much space do you need to store an mp3 song?

A

10MB

21
Q

Roughly, how much space do you need to store a DVD film?

A

4.7GB

22
Q

Roughly, how much space do you need to store a Blu-ray film?

A

25GB

23
Q

What is the capacity of my iPad storage?

A

32GB

24
Q

What is the cloud?

A

A collection of computers that we access through the internet.

25
Q

How are didgital images stored and processed?

A

Images are made of pixels, pixels are made of colour and colour is made of binary .

26
Q

What is the main function of the motherboard?

A

It holds together the crucial components of a computer.

27
Q

What is the main function of the CPU?

A

It guides the computer through the various steps of solving a problem.

28
Q

What is the main function of the Heat Sink?

A

To properly remove heat from device components to improve device performance and extend its life.

29
Q

What is the main function of the RAM?

A

It’s where your computer stores data it needs to retrieve quickly.

30
Q

What is the main function of the hard disk drive?

A

It stores all of your digital content.

31
Q

What is the main function of the CD drive?

A

It allows you to use CDs, DVDs, and Blu-ray Discs.

32
Q

What is the main function of the USB connector?

A

It allows data to be moved between devices.

33
Q

What is the difference between input and output devices?

A

Input devices take in data, output devices release data.

34
Q

What are some examples of input devices?

A

Keyboard, mouse and touch screen

35
Q

What are some examples of output devices?

A

Speakers, printers and projectors.

Computer Science (3 decks)

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