Quiz: Error Detection
Quiz-summary
0 of 9 questions completed
Questions:
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
Information
Let’s test your knowledge of error detection.
You have already completed the quiz before. Hence you can not start it again.
Quiz is loading...
You must sign in or sign up to start the quiz.
You have to finish following quiz, to start this quiz:
Results
0 of 9 questions answered correctly
Your time:
Time has elapsed
You have reached 0 of 0 points, (0)
Average score | |
Your score |
Categories
- Not categorized 0%
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- Answered
- Review
- Question 1 of 9
1. Question
An extra bit added to a string of binary code to ensure the number of 1-bits are either even or odd, depending upon the system used.
- Question 2 of 9
2. Question
A block of data is sent alongside a calculated value. The receiving computer also calculates what it believes should be the value. The values are then compared to see if an error has occurred during transmission.
- Question 3 of 9
3. Question
The final number in a code of numbers. It is calculated from all the other numbers in the code. It’s purpose is to spot errors on data entry.
- Question 4 of 9
4. Question
A form of error detection that uses a system of acknowledgements and timeouts.
- Question 5 of 9
5. Question
The receiving computer sends a copy of the data immediately back to the sending computer for comparison.
- Question 6 of 9
6. Question
Sort these Parity Check steps into order:
- The sending and receiving computers agree the protocol to be used (even or odd)
- The sending computer adds the correct parity bit to the binary data (either an extra 1 or 0)
- The sending computer sends the binary data, including the parity bit
- The receiving computer checks to make sure the overall parity of the data received is as agreed (an even or odd number of 1 bits)
- If the parity of the data is incorrect, the receiving computer will request that the data is transmitted again
- Question 7 of 9
7. Question
Sort these Checksum steps into order
- The sending computer uses the block of data to be sent, and a predefined mathematical algorithm, to calculate a checksum value
- The sending computer sends the data, plus the checksum value
- The receiving computer uses the data it receives to also calculate what it believes should be the checksum, using the same mathematical algorithm
- The two checksum values are compared by the receiving computer
- If the checksum values don’t match, the receiving computer requests that the data is transmitted again
- Question 8 of 9
8. Question
Sort these Check Digit steps into order:
- The check digit is calculated and added to the barcode, packaging, product code etc at the point of manufacture
- A human types the long numerical code into a computer, e.g. the cashier will type the barcode number when a scanner fails or packaging is damaged
- The computer calculates what it believes should be the check digit, based on the numbers entered by the human
- The computer then compares it’s calculated check digit with the check digit typed in by the human (the last digit in the long code)
- If the two don’t match, then the human has made an error when typing in the numerical code, e.g. barcode number
- The human will be asked by the computer to re-enter the numerical code
- Question 9 of 9
9. Question
Sort these steps for ARQ into order:
- The sending computer transmits a block of data
- The sending computer waits a period of time to see if the receiving computer acknowledges receipt of the data
- After a set period of time, a timeout occurs which triggers the data to be automatically resent by the sending computer
- This will continue until the receiving computer acknowledges the data has been received