N4-5 Computer Systems Revision

N4-5 Computer Systems

Revision of Terms

Computer Systems Consists of

• Data Representation

• Computer Structure

• Translators (not officially but fits here)

• Environmental Impacts of Computing

• Security

Data Representation

• Representing Numbers

• Representing Characters

• Representing Graphics

• Representing Sound

Multiple Choice

Convert this binary number to the decimal equivalent.

10001010

• 128

• 136

• 138

• 146

Multiple Choice

Convert the decimal value 79 to the binary equivalent.

• 01011101

• 10001111

• 01011100

• 01001111

Multiple Choice

Which part of this floating point number is the Mantissa?

0.526 x 10^3

• 0.526

• 10

• ^3

Multiple Choice

What is the number that has been represented in floating point notation?

0.72356 x 10^3

• 7.2356

• 72.356

• 723.56

• 7235.6

Multiple Choice

Which type of graphic is stored in the file as attributes

• Bit-Mapped Graphic

• Vector Graphic

Multiple Select

What of these are the attributes of this image? Check all that apply.

• Colour

• Line Length

• Fill colour

• Style

Multiple Choice

Last Data Rep Question!

Which is these would improve the quality of the captured digital sound

• Decreasing the sample rate

• Saving as an MP3 instead of a WAV file

• Increasing the Sample Rate

• Compressing the file size

Computer Structure

• Parts of the Processor

• Memory

• Buses

• Addressability

Multiple Choice

Which part of the processor is responsible for carrying out calculations?

• Control Unit

• ALU

• Registers

Multiple Choice

Which part of the processor is responsible for deciding which instruction to execute?

• Control Unit

• ALU

• Registers

Multiple Choice

Which part of the processor is responsible for making logic decisions in code such as if statements?

• Control Unit

• ALU

• Registers

Multiple Choice

Which part of the processor is responsible for temporarily storing values while program running?

• Control Unit

• ALU

• Registers

Multiple Choice

The contents of which type of memory is NOT lost when you power down your Computer

• RAM

• ROM

• Cache

Multiple Choice

Which bus specifies the memory location that is to be read from or written to?

• Data Bus

• Address Bus

• Control Bus

Multiple Choice

Which bus is made up of individual lines with specific functions giving instruction to the rest of the system

• Data Bus

• Address Bus

• Control Bus

Multiple Choice

Last Computer Structure Question!

Which bus is bi-directional and can transfer information between main memory and the processor?

• Data Bus

• Address Bus

• Control Bus

Final topics

• Translators

• The Environment

• Security

Multiple Choice

Which type of translator processes code one line at a time?

• Compiler

• Interpreter

Multiple Choice

Which type of Translator runs the final code quicker?

• Compiler

• Interpreter

Multiple Choice

Which type of Translator creates stand alone machine code which can run without need for source code?

• Compiler

• Interpreter

Multiple Select

Which of the following are examples of "Power Down" settings

• Shutdown

• Stand-by

• Hibernate

• Brightness

Multiple Choice

Which part of the processor is responsible for carrying out calculations?

• Control Unit

• ALU

• Registers

Multiple Select

Which of these are features of a firewall?

Check all that apply

• Check that incoming packets meet specific rules before being allowed into network

• Scramble data so can't be read

• Set rules about which stations on a network can send and receive packets

• Protect against unauthorised access from those wishing to cause harm to a network

Multiple Choice

Last Question!

What is the term for a method of scrambling data so that if an unauthorised person manages to receive the data they will be unable to read it.

• Coding

• Firewall

• Encryption

• Symbols

Well Done!

Hope you now feel confident with your

Computer Systems Knowledge!!