CompTIA
220-801 · Question #445
220-801 Question #445: Real Exam Question with Answer & Explanation
The correct answer is B: ECC. ECC (Error Correcting Code) memory uses additional check bits to both detect and automatically correct single-bit errors in RAM.
Question
Which of the following is used to detect and correct a single bit error in a memory DIMM?
Options
- ARIMM
- BECC
- CParity
- D8b10b encode/decode
Explanation
ECC (Error Correcting Code) memory uses additional check bits to both detect and automatically correct single-bit errors in RAM.
Common mistakes.
- A. RIMM is a Rambus Inline Memory Module form factor used with RDRAM technology; it describes physical packaging, not an error-correction mechanism.
- C. Parity memory can detect a single-bit error by checking whether the bit count is odd or even, but it cannot identify or correct which bit is wrong - it can only halt or report the error.
- D. 8b10b is a line coding scheme used in serial data links such as SATA and USB 3.0 to ensure DC balance and clock recovery; it is not a memory error-correction technology.
Concept tested. ECC memory single-bit error detection and correction
Reference. https://learn.microsoft.com/en-us/windows-server/administration/performance-tuning/hardware/memory
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