Why do computers need methods for error checking during data transmission?

To check for data transmission errors caused by interference

To increase the speed of data transmission

To reduce the size of data files

To improve the graphics quality

Which method is used to automatically request the retransmission of data if an error is detected?

Automatic Repeat reQuests (ARQ)

What is the purpose of a parity bit when sending a byte of data?

To check if there is an error in the transmission

To increase the speed of transmission

For an even parity bit, how is the parity bit set?

It is set to 1 or 0 so that the total number of 1s transmitted are an even number

It is set to make the total number of 0s even

What is shown in the diagram at the bottom of the page?

A binary number with a parity bit added to ensure even parity

A binary number with a parity bit added to ensure odd parity

A binary number without a parity bit

A binary number with all bits set to 1

What is the rule for even parity in error detection?

All the 1s, including the parity bit, must add up to an even number.

All the 1s, including the parity bit, must add up to an odd number.

All the 0s, including the parity bit, must add up to an even number.

All the 0s, including the parity bit, must add up to an odd number.

What is the rule for odd parity in error detection?

All the 1s, including the parity bit, must add up to an odd number.

All the 1s, including the parity bit, must add up to an even number.

All the 0s, including the parity bit, must add up to an odd number.

All the 0s, including the parity bit, must add up to an even number.

What is the purpose of a parity bit in data transmission?

To detect errors in transmitted data

To increase the speed of transmission

Which of the following best describes even parity?

The total number of 1s, including the parity bit, is even

The total number of 1s, including the parity bit, is odd

The total number of 0s, including the parity bit, is even

The total number of 0s, including the parity bit, is odd

Which of the following best describes odd parity?

The total number of 1s, including the parity bit, is odd

The total number of 1s, including the parity bit, is even

The total number of 0s, including the parity bit, is odd

The total number of 0s, including the parity bit, is even

What happens if the wrong number of bits are found during a parity check?

The data is automatically corrected

What is NOT possible with parity checks?

Knowing which bit was incorrectly transmitted

Detecting if an error has occurred

Setting a parity bit at the transmitting end

Checking parity at the receiving end

What does the receiving device do if a transmission error is found?

Notifies the transmitting end and the data is resent

Ignores the error and continues

Will a parity check find all errors that are possible when transmitting data?

No, it cannot find all possible errors

What happens if two bits are changed during data transmission when using a parity check?

The error will always be detected.

The error will never be detected.

The parity bit will change to indicate the error.

In the example shown, what is true about the received byte and the parity bit?

The received byte has two mistakes, but the parity bit is correct.

The received byte has no mistakes, and the parity bit is correct.

The received byte has two mistakes, and the parity bit is incorrect.

The received byte has one mistake, and the parity bit is incorrect.

What can be done once the row and column containing the error are identified in a parity block check?

The entire block must be retransmitted.

Which of the following is true about the parity bit in the context of the image?

It helps to detect errors in data transmission.

It increases the size of the data.

It is used to encrypt the data.

It is only used for compressing data.

What is the purpose of check digits in barcodes and other numbers?

To make sure a number has been entered correctly

To increase the price of products

To make barcodes look more complex

To speed up the checkout process

What might happen if a barcode scanner misreads a number?

The scanner may request the barcode to be scanned again

The product will be given for free

What is the purpose of a check digit in a set of numbers?

To check for mistakes in input or transmission

To increase the value of the number

To make the number easier to remember

Which of the following uses a check digit to ensure it has been scanned or entered correctly?

ISBN (International Standard Book Number) on printed books

What is the Universal Product Code (UPC) used for?

To identify products using bar codes

Why do both ISBN and UPC codes use check digits?

To make sure they have been scanned or entered correctly

To hide the product information

To increase the price of the product

What is the main purpose of using checksums when transmitting data files?

To check that the file received has no errors introduced during transmission

To increase the speed of data transmission

To encrypt the file for security

What does the sending computer do with the file before transmitting it?

It runs the file through an algorithm to produce a checksum and sends it

It compresses the file and deletes the original

It encrypts the file and stores it

It splits the file into multiple parts

What does the receiving computer do when it gets the file?

It generates the checksum and compares it with the one that was sent

It immediately deletes the file

It sends the file back to the sender

It ignores the checksum and opens the file

What does it mean if the checksums do not match after transmission?

The file may have been corrupted or altered in transmission

The file was transmitted faster than expected

The file is automatically encrypted

The file is larger than the original

Which of the following is NOT a step in the checksum process described in the material?

Encrypting the file before transmission.

Creating a checksum and sending it with the file.

Generating the checksum again upon receipt.

Comparing the received checksum with the sent checksum.

When is the checksum created and sent with the file?

Before the file is transmitted.

What happens if the sender does not receive an acknowledgement after sending a block of data?

A timeout occurs and the data is resent

The sender sends a different block of data

The receiver sends another acknowledgement

When does the sender send the next block of data in the ARQ process?

After receiving an acknowledgement

After sending an acknowledgement

Computer Science T3 Error detection

10th Grade

•

55 Qs

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Computer Science T3 Error detection

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Computers

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10th Grade

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Practice Problem

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Medium

Michael Harrington

Used 2+ times

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Data to be encrypted

Data to be duplicated

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Computer Science T3 Error detection

55 questions

Why is it important to check for errors after data transmission?

Which of the following is NOT an error detection method mentioned in the objectives?

What are the two types of parity checks used in error detection?

Check digits are used in data entry for which of the following?

What does ARQ stand for in the context of data transmission?

What is the purpose of using an automatic repeat query (ARQ) in data transmission?

Which of the following is a possible result of transmission errors?

Why do computers need methods for error checking during data transmission?

Which of the following is NOT a method used for error checking in computers?

Which method is used to automatically request the retransmission of data if an error is detected?

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