The correct answer is: C. bad RAM.
A parity error is a type of error that occurs when the data stored in a computer’s memory does not match the data that is supposed to be stored there. This can happen for a number of reasons, but the most common cause is a faulty RAM module.
RAM, or random access memory, is a type of computer memory that is used to store data temporarily. It is volatile memory, which means that it loses its contents when the power is turned off. RAM is used to store data that is currently being used by the computer, such as the operating system, programs, and data files.
When data is stored in RAM, it is stored in a series of cells. Each cell has a unique address, and the data stored in the cell is represented by a binary number. The binary number is made up of bits, which can be either 0 or 1.
When the computer reads data from RAM, it checks the parity bit to make sure that the data is correct. The parity bit is a bit that is used to check the accuracy of the data. It is set to 0 if the number of 1 bits in the data is even, and it is set to 1 if the number of 1 bits in the data is odd.
If the parity bit is not correct, it means that there is an error in the data. This can happen for a number of reasons, but the most common cause is a faulty RAM module.
If a RAM module is faulty, it can cause a number of problems, including parity errors. Parity errors can cause the computer to crash, or they can cause programs to run slowly or incorrectly.
If you are experiencing parity errors, it is important to check your RAM modules. You can do this by using a memory diagnostic tool. If the memory diagnostic tool detects a problem, you will need to replace the faulty RAM module.