1.3 Data Transmission

What type of transmission is used in walkie-talkies?

• Simplex
• Half-Duplex
• Full-Duplex
• Suplex

Why is parallel data transmission faster than serial data transmission?

• Because multiple channels are used in parallel data transmission.
• Because multiple bits are sent over a single channel in parallel data transmission.
• Because data might be skewed in serial data transmission slowing the rate of transmission.
• None of the above

What type of transmission is used to transfer data from computer to printer?

• Serial transmission
• Parallel transmission
• None of the above
• Inline transmission

How is the data in different channels of a parallel transmission synchronised?

• Using start and stop bits
• An internal timer synchronises the data
• By sending data as a group of bits
• It’s a fixed value

Why are control bits used in asynchronous data transmission?

• To calculate the number of bits
• To identify and correct errors
• To synchronise the sender and receiver
• To increase transmission speed

What type of transmission is USB?

• Synchronous parallel transmission
• Asynchronous serial transmission
• Asynchronous parallel transmission
• Synchronous serial transmission

Complete this sentence: An USB port has ……….. pins

• 1
• 2
• 3
• 4

Why is a USB device self-configuring?

• The connector can only be connected in a particular manner.
• The device drivers are automatically installed once the device is connected.
• Several data transmission rates are supported.
• None of the above

What does a computer do, when the device driver for a USB device is not available?

• The computer sends an error message.
• The computer does not respond to the USB device.
• The computer prompts the user to install the driver from the internet.
• None of the above

Which of the following correctly represents the data 1101011 if odd parity is used?

• 1101011
• 11101011
• 11010110
• 11101011