ISRO | ISRO CS 2014 | Question 10

The number of logical CPUs in a computer having two physical quad-core chips with hyper threading enabled is
(A) 1
(B) 2
(C) 8
(D) 16


Answer: (D)

Explanation: Every physical CPU corresponds to 2 logical CPU in hyperthreading and there are 2 quad core chips.
Therefore, total number of physical CPUs = 2*4 = 8
Now, 8 physical CPU corresponds to 2*8 = 16 logical CPU.

Note that a multi-core processor is a single piece of hardware (“one processor”) that provides several cores than can work concurrently.

So, option (D) is correct.

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