Computer Quiz Test - Grade 7

What is the best description of data transmission?

• Saving files on a computer.

• The process of sending data from one place to another.

• Creating new digital information.

• Changing signals from old to new formats.

A car radio can receive signals from a radio tower, but it can't send signals back. This one-way communication is an example of:

• Full-Duplex

• Half-Duplex

• Simplex

• Asynchronous

What is the main benefit of full-duplex communication, like a phone call where both people can talk at the same time?

• It is the cheapest option.

• It allows data to be sent and received simultaneously.

• It works better over very long distances.

• It uses only a single wire.

With a USB cable, data bits are sent one by one in a single line. This method is called:

• Parallel Transmission

• Serial Transmission

• Asynchronous Transmission

• Simplex Transmission

Imagine people getting on a bus one at a time through a single door. This is a good way to understand which type of transmission?

• Synchronous Timing

• Parallel Transmission

• Full-Duplex Flow

• Serial Transmission

Using a walkie-talkie, you have to press a button to talk and release it to listen. Because you can't talk and listen at the same time, this is an example of:

• Simplex Flow

• Half-Duplex Flow

• Full-Duplex Flow

• Parallel Flow

In asynchronous transmission, data is sent in small packets. What do the start and stop bits do for each packet?

• They make the transfer go faster.

• They tell the receiver when a piece of data begins and ends.

• They hide the data to keep it safe.

• They keep the sender and receiver's clocks in sync.

To work very fast, parts inside a computer must send lots of data to each other over short distances. Which transmission mode is best for sending multiple bits at once in this situation?

• Serial, because it is more reliable.

• Parallel, because it is faster for short distances.

• Half-duplex, because the parts take turns.

• Simplex, because data only goes one way.

Synchronous transmission is a fast way to send large blocks of data. Which of the following is NOT a feature of this method?

• It sends data as one long, continuous stream.

• It uses a shared clock to keep everything in time.

• It is very efficient for sending a lot of data.

• It uses start and stop bits for every single byte.

What do we call a communication method where two devices can send and receive data, but not at the same time?

• Simplex

• Full-Duplex

• Half-Duplex

• Multiplex