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Which statements best describes redundancy checking?
Redundancy checking is a technique used to detect errors or errors in a data transmission. It involves adding extra bits to the data to create a checksum or parity. The receiver then checks for errors by recalculating the checksum or parity and comparing it to the received value. If they do not match, an error is detected.
What error occurs if the number of bits is not an odd number for odd parity or an even parity?
parity error
A forward error correcting code corrects errors only doubt?
A. requiring partial retransmission of the signal B. requiring retransmission of entire signal C. using parity to correct to errors in all cases D. requiring no part of the signal to be transmitted
What is difference between parity checker and parity generator?
A parity generator checks the data to be transmitted and outputs a 0(parity bit) if the number of logic 1's in the data is even, and a logic 0 if the number is odd. So a checker takes the transmitted data and the parity bit and will compare the two, and if they are both of the same logic then the you can conclude that the data was recieved succesfully(i.e no bits were lost during transmission). Parity checker/generator use the exact same devices, but with one comparing instead of generating.
A quality or condition of being equal or equivalent?
parity
What types of errors will simple parity not detect?
Simple parity can not correct multiple errors. If more than one error exists at a time, then simple parity can not calculate the missing data.
When parity memory detects errors what happens?
A parity error always causes the system to halt.
What is error checking?
Checks for errors.
What is the error detection technique that can detect errors with only one bit?
(a) simple parity check (b) two-dimensional parity check (c) crc (d) checksum
What is parity checking used for?
Parity checking is used as a way to ensure data integrity and prevent errors, or detect them in the event they are occuring.
What do you mean by single bit error correction?
A special system of multiple parity bits (e.g. Hamming parity) that allows not only error detection but limited error correction.Ordinary single bit parity can detect reliably single bit errors.Hamming parity can correct single bit errors and detect reliably double bit errors.
What is the difference between ECC and parity memory?
ecc momory can detect and repair errors
How does longitudinal parity works?
Longitudinal parity, sometime it is also called longitudinal redundancy check or horizontal parity, tries to solve the main weakness of simple parity.The first step of this parity scheme involves grouping individual character together in a block, as fig given below 1.1fig.Each character (also called a row) in the block has its own parity bit. In addition, after a certain number of character are sent, a row of parity bits, or a block character check, is also sent. Each parity bit in this last row is a parity check for all the bits in the Colum above it. If one bit is altered in the Row 1, the parity bit at the end of row 1 signals an error. If two bits in Row 1 are flipped, the Row 1 parity check will not signal error, but two Colum parity checks will signal errors. By this way how longitudinal parity is able to detect more errors than simple parity.
A technician has been asked to install memory that detects multiple bit errors and corrects single bit errors in memory?
PARITY
Which operational characteristic of ram checks for single-bit errors but does not perform error correction?
Parity
Would you expect that the inclusion of a parity bit with each character would change the probability of receiving a correct message?
The inclusion of a parity bit extends the message length. There are more bits that can be in error since the parity bit is now included. The parity bit may be in error when there are no errors in the corresponding data bits. Therefore, the inclusion of a parity bit with each character would change the probability of receiving a correct message.
What component would cause a parity error?
Parity errors can occur in any device that stores data. It is usually not noticed unless the system has provisions (BIOS and software) to detect those errors. ECC memory and hard drives using certain configurations (such as RAID) are typical.
