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GCSE 8520 Algorithms & Data types Flashcards | StudBud
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GCSE 8520 Algorithms & Data types
GCSE 8520 Algorithms & Data types
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Computing concepts
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1
What is an algorithm?
A hardware device that stores data
Step by step instructions to solve a task
Software that analyses data
A set of instructions
2
What is pseudocode used for?
To plan algorithms using a specific programming language
To help the computer understand what you are trying to do
To plan algorithms using plain English
To program every piece of software
3
In terms of data values, what are characters?
Letters and punctuation marks
Numbers
Letters
Letters, digits and punctuation marks
4
Which of the following does not generate data values that a program can use?
Keyboard
Hard copy from a printer
Mouse click
Microphone
5
What is a variable?
A data value that changes
The weather forecast
A number
A place in memory that holds a data value that changes
6
In computing terms, what is the difference between the data values 2 and "2"?
2 is an integer, "2" is a boolean
The speech mark thingies?
2 is an integer, "2" is a character or string
There is no difference, they are both characters
7
Where are algorithms used?
Algorithms are only used by computers
Algorithms are only used in planning
Many different areas where instruction sets are needed
8
What is syntax?
A very long program
The structure used to create a flowchart
A set of rules about how to use a programming language
A way to plan algorithms in plain English
9
What is a bubble sort?
An algorithm that finds the highest number in a list
An algorithm that sorts data into the required order
An algorithm that sorts list of numbers only
An algorithm that finds the lowest number in a list
10
When is an expression used?
To debug a program
In a statement when working with values
To let people know how you feel
To create an algorithm
11
Which of the following statements is correct?
Fixed values are assigned by the program.
Fixed values are dependent on the user.
12
What shape represents a process in a flowchart?
Diamond
Dodecahedron
Oval
Rectangle
13
What happens if you type a statement incorrectly into a programming language?
Nothing will happen
You feel a but silly
You will get a syntax error
The program will correct it
14
What is a boolean?
A data type that holds whole numbers
A data type that holds characters
A data type that holds decimal numbers
A data type that can hold true or false
15
What is a declaration?
The process of assigning a variable only
The process of assigning a constant only
The process of assigning a name to a variable or constant
Giving a value to a variable
16
If we add the two real numbers 3.2 and 4.8, what is the result?
8.0
"8"
'8'
8
17
What is a string?
A variable datatype that holds a sequence of characters
A data type that holds true or false
A data type that holds letters
A type of variable that hold characters
18
What is a variable?
Data that is produced by a computer, that cannot be changed
Data stored in a memory location, that can be changed
Data stored in a memory location, that cannot be changed
Data that is always changing
19
What shape represents a decision in a flowchart?
Diamond
Rectangle
Rhombus
Parallelogram
20
What is a global variable?
A variable that can only be accessed in a procedure / sub
A variable that can be accessed from any point in a program
A variable that can be accessed by many programs
