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WorksheetsIGCSE CS Unit 2 quiz
Total questions: 10
Worksheet time: 5mins
These bytes are transmitted across a network and arrive without any errors. Does this parity block use odd or even parity?
odd
even
cannot be determined
What are the benefits of using symmetric encryption?
Uses two keys, so it's more secure than asymmetric encryption.
Faster to compute than asymmetric encryption.
The private key does not need to be shared.
The public key is derived from the private key.
How can checksums help in error detection?
Checksums are primarily used for data compression.
Checksums help in error detection by allowing verification of data integrity through comparison of calculated values.
Checksums can only detect changes in file size.
Checksums are used to encrypt data for security purposes.
What are the typical uses of USB in modern devices?
Wireless internet connectivity
Video streaming to TVs
Data transfer, device charging, and connecting peripherals.
Audio output for speakers
What is a data packet?
A data packet is a formatted unit of data for transmission over a network.
A data packet is a type of computer virus.
A data packet is a physical device used for networking.
A data packet is a software application for data analysis.
Differentiate between serial and parallel transmission.
Serial transmission sends multiple bits at once; parallel transmission sends one bit at a time.
Serial transmission is faster than parallel transmission; parallel transmission is slower.
Parallel transmission is used for long distances; serial transmission is for short distances.
Serial transmission is one bit at a time; parallel transmission is multiple bits at once.
What does USB stand for?
Universal Serial Bus
Universal System Bus
Universal Serial Connection
Unified Serial Bus
What is a parity bit used for?
To format the data for storage.
To increase data transmission speed.
To encrypt the data being sent.
For error detection in data transmission.
If even parity is used for error detection, what will the parity bit be?
0
1
If automatic repeat request (ARQ) is used to transmit a packet, a negative acknowledgement means
the sender never received replay from the receiver
the packet arrive without any errors
the checksums did not match
the packet was dropped by the router.
