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Comsci > Topic 6 And 7 > Flashcards

Topic 6 And 7 Flashcards

1
Q

What is an integer?

A

Int
Whole number only

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2
Q

What is a float or real?

A

Numbers that can have decimal part

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3
Q

What is a Boolean?

A

Can only take one or two values, usually true or false

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4
Q

What is data type character?

A

Single letter number of symbol

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5
Q

What is data type string?

A

Used to represent text with selection of characters

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6
Q

How to workout ASCI number of the letter?

A

ASC(letter)

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7
Q

How to work out which ASCI number is which letter

A

CHR(code)

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8
Q

What does DIV

A

Divides into a whole number and has no remainder

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9
Q

What does MOD Do

A

Show the remainder of a calculation

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10
Q

What does .upper do?

A

Changes all characters to upper case

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11
Q

What does .lower do?

A

Changes all characters to lower case

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12
Q

What does .length do ?

A

Returns the number of characters in a string

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13
Q

What does .left do?

A

Returns the left character

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14
Q

What does .right do

A

Returns right characters

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15
Q

What does .substring do?

A

Extracts a substring from the string

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16
Q

Describe a DO until loops

A

Controlled by a condition that has to be met
Always run at least once
You can get an infinite loop if the statement is impossible

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17
Q

Describe a while loop

A

Controlled by a condition at the start
Keep going while condition is true
Never run code if condition is initially false
Get and infinite loop if conditions is always true

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18
Q

Describe a logic gate

A

Triangle flowing from input to output with a circle

19
Q

Describe an and gate

A

A square with rounded top with two inputs and one output

20
Q

Describe an or gate

A

Looks like the Star Trek sign

21
Q

Function of a Not Gate

A

It reverse the input or gives the opposite input

22
Q

What is the function of an and gate

A

Both inputs must be true for a positive result

23
Q

What is the function of an or gate

A

One or more inputs must be true for a positive result

24
Q

How to code an array

A

Create be typing array “then array name” [num if element ]
Assign each element a number e.g
Array rowers [4]
Rowers [1] Alfie
Rowers [2] Sid
Rowers [3] Noah
Rower [4] jack

25
Q

How to call an array

A

Print( name of array and array number)
Eg print(rower [4])

26
Q

How to open a file

A

File = open(“file.txt”)

27
Q

How to create new file

A

Newfile(“myfile.txt”)

28
Q

How to write lines in a file

A

Writeline()

29
Q

How to read lines form a file

A

Readline()

30
Q

How to close file

A

Close ()

31
Q

What is procedure

A

A set of instructions that can be called under 1 name that do not return data

32
Q

Functions

A

Are sets

33
Q

What is a local variable ?

A

A variable that can only be used in the structure that declared in

34
Q

What is a global variable?

A

Variables that can be used any time after the declaration

35
Q

What is a high level language?

A

Source code that is easy for human to write as it is close to English

36
Q

What are low level language

A

Languages that are hard for human to write as they a far from English

37
Q

What language to computers understand

A

Machine code

38
Q

Why do we need translators

A

To translate high level languages into machine code

39
Q

What are the two types of translators

A

Compiler and interpreter

40
Q

What does an interpreter do?

A

Translate code on instruction at a time
Needed every time the program is run
Will return the first error
Slower

41
Q

What does a compiler do?

A

Translates the while script
Only need once
Returns list of errors
Runs quicker

42
Q

What is a IDE

A

Integrated development environment a piece of software to help the developers

43
Q

Features of an IDE

A

Translators
Auto documents
Graphical user interfaces

Comsci (7 decks)

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