1
GATE CSE 2022
+1
-0.33

Consider a digital display system (DDS) shown in the figure that displays the contents of register X. A 16-bit code word is used to load a word in X, either from S or from R. S is a 1024-word memory segment and R is a 32-word register file. Based on the value of mode bit M, T selects an input word to load in X. P and Q interface with the corresponding bits in the code word to choose the addressed word. Which one of the following represents the functionality of P, Q, and T?

A
P is 10 : 1 multiplexer; Q is 5 : 1 multiplexer; T is 2 : 1 multiplexer
B
P is 10 : 210 decoder; Q is 5 : 25 decoder; T is 2 : 1 encoder
C
P is 10 : 210 decoder; Q is 5 : 25 decoder; T is 2 : 1 multiplexer
D
P is 1 : 10 de-multiplexer; Q is 1 : 5 de-multiplexer; T is 2 : 1 multiplexer
2
GATE CSE 2018
Numerical
+1
-0
Consider the sequential circuit shown in the figure, where both flip-flops used are positive edge-triggered $$D$$ flip-flops.

The number of states in the state transition diagram of this circuit that have a transition back to the same state on some value of “in” is _____.

3
GATE CSE 2016 Set 1
Numerical
+1
-0
We want to design a synchronous counter that counts the sequence $$0-1-0-2-0-3$$ and then repeats. The minimum number of $$J-K$$ flip-flops required to implement this counter is _________.
4
GATE CSE 2015 Set 1
+1
-0.3
Consider a 4-bit Johnson counter with an initial value of 0000. The counting sequence of this counter is
A
0, 1, 3, 7, 15, 14, 12, 8, 0
B
0, 1, 3, 5, 7, 9, 11, 13, 15, 0
C
0, 2, 4, 6, 8, 10, 12, 14, 0
D
0, 8, 12, 14, 15, 7, 3, 1, 0
GATE CSE Subjects
EXAM MAP
Medical
NEET