Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
66 Cards in this Set
- Front
- Back
|
1) What's is secondary storage |
Backs up primary storage through replication |
|
|
1) Type of secondary storage |
USB drive |
|
|
2) Type of secondary storage |
Floppy disk |
|
|
3) Type of secondary storage |
CD-R |
|
|
4) Type of secondary storage |
DVD-R |
|
|
5) Type of secondary storage |
Magnetic Tape |
|
|
1) Optical media |
Data held in a digital forms |
|
|
2 ) Optical media |
Written and read by laser |
|
|
3) Optical media |
CD and DVD |
|
|
1) Magnetic Media |
Hard drive |
|
|
2) magnetic media |
Floppy disk |
|
|
3) magnetic media |
Utilizes magnetic patterns |
|
|
1)SSD |
No moving mechanical parts |
|
|
2) SSD |
More resistant to physical shock |
|
|
3) SSD |
Runs silently |
|
|
1) How is data read from CD? |
Reflective and non-reflective bumps converted into binary |
|
|
Reflective bump on cd=? |
1 In binary |
|
|
Non-reflective bump= |
0 in binary |
|
|
Why Is SSD better than magnetic media |
Ssd boots in less than one minute Hard drive requires time to speed up |
|
|
Volatile memory |
Requires power to retain memory |
|
|
Non-volatile memory |
Doesn't require power to retain memory |
|
|
Example of volatile memory |
RAM Cache |
|
|
Example of Non-volatile |
ROM FLASH MEMORY |
|
|
Why would you use volatile memory |
Temporary retention of data |
|
|
Why would you use Non-volatile memory |
Long retention of data |
|
|
When would you need virtual memory |
When computer requires more RAM |
|
|
Sequence |
Functions happen one step at a time Code run in sequential order |
|
|
Selection |
Program asked questions Decide from one of two answers Continues If else statement |
|
|
Iteration |
Process repeated after being completed |
|
|
What is a parameter |
A variable called within a function |
|
|
Name one difference between a procedure and a function |
A procedure will not output but a function will output a value |
|
|
What does return do |
Takes a given input and returns an output |
|
|
Advantage of using functions/procedures |
Organisation |
|
|
What Is a variable |
A value that can change depending on conditions or info given to program |
|
|
What is a constant |
A value that cannot be altered by program during normal execution |
|
|
Example of a constant |
Pi |
|
|
Why do we use different data types |
They all do different jobs |
|
|
What does scope mean in relation to variables |
A variables scope is where in the program it will be required |
|
|
What is a syntax error |
Spelling errors or missing important features |
|
|
Run time error |
Code asking for something that cannot be done |
|
|
What is a Logic error |
An error the program doesn't recognise |
|
|
What is the purpose of a CPU |
Executes a sequence of stored instructions called a program |
|
|
What does data bus do? |
Carries data to and from the cpu |
|
|
What does the address bus do? |
Carries addresses of data and instructions between the memory and cpu |
|
|
What is Clock speed |
Operating speed of a computer |
|
|
What does multiple cores do for a computer |
Increase performance and speed |
|
|
Name 3 uses of a computer system |
•Communicate •Business •education |
|
|
Name 3 hardware requirements of a computer system |
•Processing power •memory •Secondary storage |
|
|
Name 3 things associated with processing power |
CPU Clock speed Cache |
|
|
Name 3 characteristics of a "bit" |
•smallest unit of data in a computer •Has single binary value of 0 or 1 •stores data and executes instructions |
|
|
Describe Alpha |
•Strongly ionising •Doesn't penetrate far •Blocked by paper |
|
|
Describe Beta |
•Moderately ionising •Moderately penetrative •Blocked by aluminium |
|
|
Describe Gamma |
•Electromagnetic radiation •Blocked by led •Weakly ionising |
|
|
Describe a chain reaction |
•Neutron absorbed •Atom now unstable •Splits and spits out other neutrons •Neutrons absorbed by other atoms |
|
|
What happens inside a nuclear power station |
•Controlled reaction •Heat boils water •Steam turns turbine •Turbine powers generator •Generator produces electricity |
|
|
How do they control chain reactions |
Fuel rods placed in graphite to slow down neutrons. Control rods absorb the neutrons |
|
|
Define a computer system |
Combination of hardware and software working together to make a working solution |
|
|
Name the 5 stages of waterfall development |
•Requirement analysis •Design •Development •Testing •Maintenance |
|
|
Name two advantage of the spiral development |
•Allows the designer to go back and make a change easily •Easy to fix anything as things are being repeated constantly |
|
|
Name two disadvantages to spiral development |
•Hard to decide deadlines •Hard to assign roles |
|
|
Name three types of testing |
Beta testing Modular/Unit testing Stress testing |
|
|
Describe modular testing |
Divide the program into seperate modules and test each module |
|
|
Why is modular testing good |
You can test each aspect of the program |
|
|
Define a computer network |
A set of computers connected to eachother for the purpose of sharing resources |
|
|
Advantages of external code sources |
•API'S allow programmers to create programs faster •External libraries simplify complicated code |
|
|
Disadvantages of external code sources |
•Impossible to fix bugs in the external code •Could be out of date |
