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- 1. Multiple Choice
The value 2960 would be stored in a computer system usig 'floating - point representation' as shown: 0.2960 x 10(4)
Identify th mantissa and exponent in th above floating-point representation:
Mantissa: 2960
Mantissa: 2.960
Exponent:4
Exponent: 0.4
- 2. Multiple Choice
The current meter reading of 23000.50 would be stored in a computer system using floating-point representation as shown:
0.2300050 x 10(5)
Identify the mantissa and exponent in the above floating point representation:
Mantissa: 2300050
Mantissa: 2.300050
Exponent: 5
Exponent: 0.5
- 3. Multiple Choice
How a real number is stored in a computer's memory?
Using floating point representation
Using value of mantissa and exponent for this number
Using binary numbers 0 or 1
A a decimal number with two or more decimal places
- 4. Multiple Choice
State a standard code used to represent text characters and the number of bits used to store each character:
ASCII American Standard Code for Information Interchange
Binary code: using values 0 or 1
Using value of Mantissa and Exponent
Any code writting in high level language
- 5. Multiple Choice
Each of the letters of the message ERROR will be stored as an ASCII character. Calculate the number of bits required to store this message:
8 bits
128 bits
16 bits
40 bits
- 6. Multiple Choice
Select correct names for attributes of vector graphic:
coordinates
fill colour
line colour
size in pixels
- 7. Multiple Choice
The line (see graphic) is stored as a vector graphic. State one attribute of this object.
x and y coordinates
thickness/width and colour
length, rotation and angle
transparency, opacity and layer
- 8. Multiple Choice
Vector Graphics are stored in a computer in a form of an object’s (shape’s) set of definitions, properties, instructions, attributes of this object.
TRUE
FALSE
- 9. Multiple Choice
Describe how a bit-mapped graphic is represented in a computer system's memory:
Using grid of pixels
storing the value of colour for each pixel within this graphic
with insructions how to draw this graphic
as a screenshot saved as a bmp file
- 10. Multiple Choice
The user interface design is implemented. It contains a bit-mapped graphic and some text. Describe how a bit-mapped graphic would be stored?
The bitmapped graphic is stored as a pixels
The bitmapped graphic would be stored as a x and y coordinates
Each pixel will store binary value
Each coordinate (x,y) will store the value
- 11. Multiple Choice
When the program is running it carries out the following tasks: stores the original bonus value of 50 and checks if sales > 10. State the part of the processor that would temporarily store the value 50.
Register
Arithmetic and Logic Unit
Control Unit
Network Interface Card
- 12. Multiple Choice
State part of the processor that would perform comparison between the value passed from user input to the value stored within program's source code.
Register
Arithmetic and Logic Unit
Control Unit
Data Bus
- 13. Multiple Choice
A database query design includes the conditions in the search criteria. State the part of the processor where the conditions will be evaluated?
Registers
Arithmetic and Logic Unit
Control Unit
Data Bus
- 14. Multiple Choice
When the program is implemented, the water temperature will be stored in the memory of the washing machine's built in computer. State the bus used to transfer the stored water temperature to the processor.
Data bus
Address bus
school bus
Memory bus
- 15. Multiple Choice
The computer system organises data in memory so that it can be retrieved using unique and separate locations/addresses of data saved within memory.
TRUE
FALSE
- 16. Multiple Choice
State the processor component that calculates the total cost.
Register
Arithmetic and Logic Unit
Control Unit
Data bus
- 17. Multiple Choice
Name the part of the computer system that transfers the value of totalCost from main memory to the processor.
Arithmetic and Logic Unit
Control Unit
Data Bus
Address Bus
- 18. Multiple Choice
Name the part of the computer system that will carry out each of the following tasks during the execution:
Carries the location of variable in main memory
Address Bus
Data Bus
Register
Control Unit
- 19. Multiple Choice
Name the part of the computer system that will carry out each of the following tasks during the execution:
transfers the value of variable from main memory to the processor
Address Bus
Data Bus
Register
Control Unit
- 20. Multiple Choice
What is the function of a processor's registers?
to store data temporarily
to save a list of all changes made since you purchased the device
to track user's online activity
to save all changes made to files
- 21. Multiple Choice
How the content of the variable of real type would be stored in the computer's memory?
as a number with two decimal places
as a number calculated by program
as a number declared in first lines of program's code
using its mantissa and exponent
- 22. Multiple Choice
The advatantage of using an interpreter is that:
there is no need to leave the editing environment
the location with the position of errors within the code will be identified during the test run
Code is only translated once
Compiiled code doesn’t require as much memory to execute therefore it will take less memory during execution.
- 23. Multiple Choice
What is the advantage of using a compiler to translate the program code into binary?
the location with the position of errors within the code will be identified during the test run
Compiled code doesn’t require as much memory to execute therefore it will take less memory during execution
Code is only translated once
Once code has been compiled – it cannot be edited
- 24. Multiple Choice
The finished program was compiled before it was stored in the washing machine's memory. Why this program was compiled?
it doesnt require further translation
the translator of this program doesnt need to be stored inside the memory of the washing machine
the location with the position of errors within the code was indetified during the test run
there was no need to leave the editing environment
- 25. Multiple Choice
What would be the reason(s) for program to be compiled?
The translator of the program doesn’t need to be present when executing code
Program would not need to be translated again when in use again
Program runs/executes faster as it does, and it doesn’t require further translation
· To identify a list of errors in the code during testing and require less memory (RAM)
- 26. Multiple Choice
What are the advantages of using interpreter rather than compiler?
There is no need to leave the programming environment
Access to tracing facilities when testing code
Access to debugging facilities when testing code
Interpreted code executes until an error is found therefore it allows easy identification of errors
- 27. Multiple Choice
What is the feature or function of the computer system that could be used to reduce the amount of energy it uses?
Reduction in screen’s level of brightness
Setting up the device with sleep function after a specific amount of time of inactivity or during the specific time of the day/night
· Settig up the device with the function “go standby” when it is not used for a set period and no activity from the user is detected
Change the colour of screen to orange/yellow
- 28. Multiple Choice
A firewall which can be in a form of software or hardware acts as a filter for network traffic and connections which are incoming into the device connected to the network. It restricts access to the network for these connections which are identified as not trusted/suspicious/harmful/malicious.
TRUE
FALSE
- 29. Multiple Choice
What are security precautions which could be used to protect sensitive data?
Use an effective method of data an encryption
Make sure that there is a firewall installed on a device that stores/processes the sensitive data
Switch off the device after every use
Reduce brightness of screens
- 30. Multiple Choice
Select the purpose(s) of a firewall?
to block any attempts to access the protected by firewall device
to filter incoming network traffic so only trusted and reliable network connections have access to the device.
to scan the device for any malicious software present
to check if keyloggers are installed on device
- 31. Multiple Choice
How encryption can keep data secure?
by coding protected data
to make data not readable to the third party when it is captured during travel between sender and receiver
It changes the order of letters in data
the data is sealed digitally and cannot be opened
- 32. Multiple Choice
The security precaution which is used to secure data in electronic communications is called encryption
TRUE
FALSE
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