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Higher Computing Revision 2 Flashcards | StudBud
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Higher Computing Revision 2
Higher Computing Revision 2
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A random selection of questions from Higher Computing
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1
What two statements are true about vector graphics
Objects can be layered
Less constrained by mathematical objects
More realistic images
Graphics are scalable without losing resolution
2
State the feature being used in Line 4 and explain a benefit of its use.
Fact: Does not facilitate queries
Rule: lines have to carried out in a linear fashion
Fact: uses same information to achieve a result
Rule : Adds meaning based on other facts /rules
3
State two tasks undertaken by an interface when transferring photographs to a desktop computer.
Handling of status signals
Transfer faster download speeds
Data Format Conversion
Compress the photographs
4
Calculate the following:
5678.9898 Gb
334.7 MB
67676.9898 Mb
26465.878 Kb
5
State two benefits of prototyping when following a rapid application development methodology.
Allows the client to see/test/feedback on proposed solutions
The client can see the final developed prototype first
Specific elements can be prioritised and tested early on
6
What statement is true of an internal style sheet.
It is only loaded once
It is embedded within the HTML code for each page
It is a separate file that is very large.
7
State the type of relationship between the two entities: People and Hobbies
One to One
Many to Many
One to Many
8
State two parts of this website that are generated using client-side scripting.
Time
Date
Image
Css
9
Explain how cache memory can improve system performance.
Memory can be increased to process instructions faster
Because it has a larger processing speed
Frequently accessed instructions are held in cache.
Instructions are sent quicker to main memory
10
Which two statements are true for a Bit-map graphic?
Can be edited in fine detail at pixel level
You can edit individual attributes
More realistic images
Objects can be layered
11
What can companies do to use software that is not compatible with their operating system.
Buy a new operating system
Use two different operating systems
Purchase new software
Install a virtual machine
12
State what is meant by a Compound Key
A primary key with more than one field
A surrogate key that identifies important fields
A foreign key that links to the primary key
13
How can usability testing be carried out on a website
Split the testing between the programmers
By using the client to test the software
By releasing the software earlier
By using independent test groups
14
How can quad-core processors improve load times for web apps containing client-side scripts.
Instructions can be split between the processors
The processors can be programmed for certain tasks
Specific instructions can be allocated to certain processors
15
Convert the number -120 to binary using 8 bits.
10001000
10101010
01011111
01010000
16
Using Pseudocode or a language you are familiar with. Complete line 9 of the algorithm
counter = false
found = true
counter = true
found = false
17
Describe one advantage of upgrading to new computers.
More jobs to build the new computers.
It reduces the need for computers/parts to go to landfill
Old computers can be sold cheaply
It costs much less now for upgrading
18
State two advantages of using a hybrid cloud service
Sensitive data can be stored on the private cloud
You can outsource services to the public cloud when needed
Data is more secure on the public cloud
You can switch between the two clouds easily
19
Describe what is meant by a hybrid cloud
A private cloud service
A combination of private and public cloud
A personal cloud server for employees
A public service
20
How can an operating system allow restrictions to be set up for different access rights?
Install anti-virus software
Restrict the number of employees who can use it.
Set usernames and passwords
Set up different groups or profiles
