0.11000111x2 power of 10101101. Name the mantissa and exponent.
M= 11000111
E=10101101
change e into whole number
What does standard mean in ascii
Normal code which is used
- What was the issue with using the original 7 bit ASCII to represent text?
Too many characters
How many characters can be represented using ascii
256
Give 2 examples of control characters
CRTl esc
What are the four vector graphics shapes
Elise line polygon rectangle
What is a bitmapped graphic
A bit map graphic is represented as a 2 dimensional array of pixels.
The colour of each pixel is stored as a binary code.
What is bit depth
The bit depth is the number of bits used for the colour code.
What is resolution
This is the number of pixels in a fixed area of a bit mapped graphic.
High resolution images have a large number of small pixels and low resolution images have a small number of large pixels.
What does ASCII stand for
American Standard Code for Information Interchange.
Example of an integer
4
Example of a float
5.4
Example of char (character)
F
Example of string
Hello
9:00
what are the attributes of shapes
fill colour, line colour coordinates
what is == for
to check if answer = fixed value
e.g. ==ICT
what is indentation
you press tab on the line where you say print
if temperature > 30:
print(“It’s hot!”)
else:
print(“It’s not that hot.”)
how is a vector graphic stored
Object/shape (1 mark)
(1 mark for)
Stored as a set of definitions/
properties/instructions/attributes
OR
Example of at least 2 attributes
what is a syntax error
A syntax error is a mistake in the structure or grammar of code that makes it invalid in a programming language.
describe and implement the phases of an iterative development process
Analysis- outline what the programme is going to do
design- plan design user interface
implementation-write the code
testing0ensure all aspects work correctly
documentation-technical guide of how to install software
evaluation- fit for purpose, and robust
evaluation
how does ASCII represent characters
extended ASCII uses 8 bits to represent 256 characters.
each character has a unique binary number which is stored to represent that character
explain how a computer system organises data in memory so it can be retrieved
memory is organised into separate locations which can store data
each location is unique and the location can be used to identify the area in memory
