COmputing Flashcards
In ascii,what are non printable characters?
- back space
- enter key
How is a real number stored in a computer
Mantissa and exponent
Explain how a computer system organises data in memory so that it can be retrieved
it organises data in separate unique locations
What is the purpose of a firewall
restricts access to foreign networks
explain how encryption keeps data safe
encodes a file and makes it unreadable to others
what are the 3 loops and what are there purposes
-conditional-loop will run till condition meet
-fixed- will run a set number of times
Do-while run until the condition is meet
What are the four vector shapes
- rectangle
- line
- ellipse
- polygon
what are the three main parts of a CPU and their function
- control unit-this controls the order of execuition and timing of instructions
- ALU-preforms calculations
- Registers-temp storage
what bus goes both ways (UNIdirectional) and where is it going
Data bus
-from cpu to memory or vice versa
what bus is bidirectional
address
-cpu to memory only
What are the two types of translators
interpreter
compiler
describe how a bit mapped graphic would be stored
it would be stored as pixels with each pixel stored as a value
what are the main functions of a interpreter
does it line by line
to easily spot errors
and code is not saved
what are the main functions of a compiler
translates and executes the complete program once and saves a version in machine code
this is only done once
how to remember this easily
Compiler and interpreter
Compiler
Complete program
CODE is saved
interpreter
INDIVIDUAL lines
Individual times
What are some complex operators
AND,OR,NOT
What is a syntax error and whats the outcome
causes by adding extra or missing characters
-program crashes
What is a executation error and what is its outcome
when the program tries to do something impossible
program crashes
what is a logic error and whats its outcome
program runs but causes unexpected output
-program still runs
What are some disadvantages of flat file databases
Data duplication
insert,update and delete errors
What does GDPR mean
general data protection regulation
how must data be held by GDPR standards
- Data must be held for its intended purpose
- held securely
- not kept for longer than necessary
what rights do individuals have under the GDPR
- right to be informed about there data
- right to access the data held
what rights do individuals have under the GDPR
- right to be informed about there data
- right to access the data held
