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37.

Which one of the following circuits is NOT equivalent to a 2-input XNOR (exclusive NOR) gate? [1 mark]

last reply by CpjJwWHV • 13 years ago • asked in Computer Science And Engineering, 2011

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38.

The simplified SOP (Sum of Product) form of the Boolean expression
(P+Q +R ).(P+Q +R).(P+Q+R ) is : [1 mark]
(A) (P .Q + R )
(B) (P+Q .R )
(C) (P .Q + R)
(D) (P.Q + R)

last reply by CpjJwWHV • 13 years ago • asked in Computer Science And Engineering, 2011

View Comments [3 Reply]
39.

The minimum number of D flip-flops needed to design a mod-258 counter is
[1 mark]
(A) 9
(B) 8
(C) 512
(D) 258

last reply by CpjJwWHV • 13 years ago • asked in Computer Science And Engineering, 2011

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40.

A thread is usually defined as a “ light weight process” because an operating system (OS) maintains smaller data structures for a thread than for a process. In relation to this, which of the following is TRUE? [1 mark]
(A) On per-thread basis, the OS maintains only CPU register state
(B) The OS does not maintain a separate stack for each thread
(C) On per-thread basis, the OS does not maintain virtual memory state
(D) On per-thread basis, the OS maintains only scheduling and accounting information

last reply by CpjJwWHV • 13 years ago • asked in Computer Science And Engineering, 2011

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41.

K4 and Q3 are graphs with the following structures.

Which one of the following statements is TRUE in relation to these graphs? [1 mark]
(A) K4 is planar while Q3 is not
(B) Both K4 and Q3 are planar
(C) Q3 is planar while K3 is not
(D) Neither K4 nor Q3 is planar

last reply by CpjJwWHV • 9 years ago • asked in Computer Science And Engineering, 2011

View Comments [6 Reply]
42.

If the difference between the expectation of the square of a random variable (E[X²]) and the square of the expectation of the random variable (E[x])² is denoted by R, then
[1 mark]
(A) R = 0
(B) R < 0
(C) R ≥ 0
(D) R > 0

asked in Computer Science And Engineering, 2011

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