Summer Exam Flashcards
What is an algorithm?
An algorithm is a list of steps you give to computers to solve a problem or get something done.
What is a flowchart?
A flowchart is a diagram depicting a computer algorithm.
What shape do flowcharts use for the start and stop?
Curved rectangle
What shape do flowcharts use for inputs and outputs?
Parallelogram
What shape do flowcharts use for decisions?
Diamond
What shape do flowcharts use for processes?
Rectangle
How is it different giving instructions to a computer than giving instructions to a human?
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.
What is a computer programme?
A computer programme is a series of instructions to tell a computer exactly what to do and how to do it.
What is a variable?
The value that changes in a programme, eg. The score or the timer.
What are sequences?
A series of coded instructions that tell the computer what to do.
What are loops?
A loop is a sequence of instructions that is repeated for a specified number of times or until a particular outcome is reached.
What are if statements?
If statements are used to let a program select an action depending upon the value of variables held in the program.
Count to 5 in binary
0001
0010
0011
0100
0101
How do computers use binary?
Computers use electrical signals that are on or off, so they have to see everything as a series of binary numbers.
what is the difference between analogue and digital technologies?
Digital technology converts information into binary, Analogue technology doesn’t.
What does it mean to digitise information?
Digitising information is the process of converting information into a digital format.
What does virtual mean in the context of Digital Technology?
A digitally replicated version of something real.
Roughly, how much space do you need to store a word document?
30KB
Roughly, how much space do you need to store a picture?
4MB
Roughly, how much space do you need to store an mp3 song?
10MB
Roughly, how much space do you need to store a DVD film?
4.7GB
Roughly, how much space do you need to store a Blu-ray film?
25GB
What is the capacity of my iPad storage?
32GB
What is the cloud?
A collection of computers that we access through the internet.
