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ISRO CS 2019 : Digital Booster Quiz 3

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Question 1

What is the minimized logic expression corresponding to the following K-Map?

Question 2

Let a function F which has 3 input variables (x,y,z). The function F will be high only when atleast two of the input variables are set to high. Draw the K-Map for the given function and find its boolean expression :

Question 3

Consider the following circuit :

What is the address range of Decoders D₈ and D₁₅ in Hexadecimal format (a₇ is MSB).

Question 4

If the maximum output voltage of a DAC is V volts and if the resolution is R bits, then the weight of the most significant bit is ________.

Question 5

What is the value of ‘d’ in binary, after the execution of following expression?
int a = Ox65, b = Ox8E, c = 45, d;
d = a⎪b & c⎪a;

Question 6

The decimal number -39 is expressed in 2’s complement form as?

Question 7

A new type of synchronous flip-flop has the following characteristic table.

Choose the correct corresponding excitation table entry for Q(t) =0 and Q(t+1)= 1. Here * denotes don’t care.

Question 8

In an SR latch made by cross coupling two NAND gates, if both S and R inputs are set to 0, then it will result in

Question 9

Logic family popular for low power dissipation

Question 10

A modulus-12 ring counter(Johnson counter) requires a minimum of

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GATE & PSU CS Digital Logic

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