1. Given the expression (X + Y) x (W - Z) + 2 Expressed in Reverse Polish Notati
ID: 3851075 • Letter: 1
Question
1. Given the expression
(X + Y) x (W - Z) + 2
Expressed in Reverse Polish Notation, the above expression becomes:
A. XY+WZ-x2+
B. XY2+WZ-x+
C. XYWZ2+x-+
D. 2 + (-Z + W) x (Y + X)
2. What series of Register Transfer Notation (RTN) microoperations implement the instruction LOAD X?
A. AC <--- MAR
B. X <--- MBR
AC <--- M[X]
C. MAR <-- X
MBR <-- M[MAR]
AC <-- MBR
D. AC <-- X
3. In a system implementing virtual memory, given a virtual address space of 8K bytes, physical memory of 4K, a page size of 1K,and a virtual address of 13 bits, what is the physical address (effective address) in decimal that is derived from the virtual address given by 0100000000010? (Hint: you will need 3 bits to encode the page number in the virtual space, and 2 bits to encode the frame (physical memory page).
A. 8 B. 2 C. 4 D. 16
4.
Given the following truth table shown for an S R flip-flop, what S and R inputs result in no change of the internal state of the flip-flop circuit?
S R Q(t) Q(t+1)
0 0 0 0
0 0 1 1
0 1 0 0
0 1 1 0
1 0 0 1
1 0 1 1
1 1 0 undefined
1 1 1 undefined
S = 0, R = 0
S = 1, R = 1
S = 1, R = 0
none of these
A.S = 0, R = 0
B.S = 1, R = 1
C.S = 1, R = 0
D.none of these
Explanation / Answer
1 ) Answer: A) XY+WZ-X2+
2) Answer : C) MAR <-- X
MBR <-- M[MAR]
AC <-- MBR
4) Answer : A) S=0,R=0;
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