ITPEC FE Morning October 2023 Question 14
Source exam: ITPEC FE Morning October 2023Topic: Computer Systems & Hardware
ITPEC FE Morning October 2023 — Question 14 of 80
ECC Redundant Bits — apply the given formula for error correction redundancy.
Given: a data bus of width 2^n requires n + 2 redundant bits.
- •
128 = 2^7→n = 7 - •Redundant bits =
7 + 2= 9
Why not others:
- (a) 3 — would apply to a 2-bit bus (n = 1)
- (b) 8 — uses n + 1, wrong formula
- (d) 10 — uses n + 3, wrong formula
Key rule: Express the bus width as 2^n, then plug n into the given formula n + 2.
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