2015 paper Flashcards
what’s the most suitable file type for:
- An image showing a map of the school
- A text document containing information for parents about the school rules
- A high resolution picture of all the staff and pupils
- A short video clip of some pupils saying why they like the school
- JPG
- JPG
- MPEG
explain why lossy compression is suitable for a video clip but not suitable for a text document
when a file is compressed, some data is lost which is not noticeable in a video but would make a text file unreadable
state the data type of the following variables used in the flow diagram
gender- string
dose- real
isPregnant- boolean
use the flow diagram to calculate the correct dose of medicine for a male aged 30
show your working
use the flow diagram to calculate the correct dose of medicine for a pregnant female aged 19
show your working
utility programs include antivirus, file transfer, firewall, and system cleanup. which two can be used for security
anti virus
firewall
identify and describe two methods by which the operating system can provide additional security directly
password, only allows authorised users to access the system
encryption, prevents hackers from understanding data if it’s accessed
describe what is meant by high level code
this is code which is dependent on machines and needs to be translated before it can be executed
describe what is meant by machine code
this is code which is specially designed for the CPU to execute, it consists of binary instructions
state what a compiler is needed
to pick up syntax errors
describe the standards that should be applied to the code produced
the code should be written using things like the use of functions and comments. this will allow multiple people to work on the same project so that it can be developed more efficiently
state what is meant by off the shelf software
software which is designed for more than one user
describe how the data handling software can be used to set up the structure of the database
it can be used to create tables with fields that can organise data clearly
state two tasks the hairdresser can perform using the data handling software, once the database is it use
- add appointment data
2. save data about appointments for later use (ie archive it)
describe how the CPU and RAM work together to enable the tablet computer to operate
programs in use are stored in RAM. The CPU executes instructions in order to fetch data from RAM
describe the purpose of cache memory cuff y
it speeds up the performance of the computer as data doesn’t need to be fetched from RAM
describe how the advances in memory technology have allowed significant improvement in the performance devices such as tablet computers
the memory is smaller in size, it also has faster assess and costs less. the technology can be smaller and have similar capacity
what is an opcode
it specifies the operation to be carried out. ie…
what is an operand
part of the instruction that supplies the data needed for an operation. ie…..
state two ways the local area network can be used to monitor the work of employees
for controlling log off and on times
describe two differences between ip addresses and mac addresses
IP addresses are configured by software and MAC addresses are configured by hardware
describe what is meant by failover and justify the need for it in a network
it allows the bank to operate without downtime
state one input, output and storage device of a mobile phone
input: touch screen
output: screen
storage: SD card
