AQA A LEVEL COMPUTER SCIENCE PAPER 2 EXAM QUESTIONS WITH CORRECT ANSWERS
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Course
AQA A LEVEL COMPUTER SCIENCE
Institution
AQA A LEVEL COMPUTER SCIENCE
AQA A LEVEL COMPUTER
SCIENCE PAPER 2 EXAM
QUESTIONS WITH CORRECT
ANSWERS
What is the principle of operation of a digital camera? -
ANSWER -1) Shutter opens to let light onto a sensor at the
back of the lens
2) RGB filters are used with different sensors in the
camera to separate light
3) ...
AQA A LEVEL COMPUTER
SCIENCE PAPER 2 EXAM
QUESTIONS WITH CORRECT
ANSWERS
What is the principle of operation of a digital camera? -
ANSWER -1) Shutter opens to let light onto a sensor at the
back of the lens
2) RGB filters are used with different sensors in the
camera to separate light
3) Intensity of each colour falling on a sensor is stored to
form an RGB value
What are some issues that can lead to data transmission
errors? - ANSWER -- Electrical Interference
- Power surges
- Synchronisation issues
- Physical issues with cables/connectors
, How are parity bits used? - ANSWER -- Used for detecting
whether or not there has been an error in the data
- 1) either odd ore even parity can be used to 'complete' the
data
2) If the wrong number of bits are 'on' e.g. states even
parity, shows odd parity an error has ocured
3) Receiving computer notifies the transmitting end and
the data is resent
How is Majority voting used? - ANSWER -Each bit of the data
is sent multiple times, the correct bit is the one that appears
most out of the three
How are Check digits used? - ANSWER -- A single digit is
calculated from all other digits in a string of digits, using a
set method, and appended on the end of the string
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