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ISRO EC 2018:Digital Circuits & Microprocessor Booster Quiz 3

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Question 1

The initial contents of 4-bit serial in-parallel out right sift, register shown below is 0010. After three clock pulses are applied, the content of shift register will be

Question 2

A bank has 3 locks with 1 key for each lock. Each key is owned by a different person. In order to open the vault atleast two people must insert their keys into the assigned locks. All the keys are not inserted at the same time. If the system is to be designed with only two input NAND gates, then number of NAND gates required are ________.

Question 3

Consider the circuit given below



The minimized expression for F (X, Y, Z)

Question 4

Minimum how many 1:2 and 2:4 decoders are required to implement the function F (a, b, c) = m (0,2,3)?

Question 5

Minimum how many 2:4 decoders are required to implement the function F (a, b, c) = ∑m (0,3,4,7)?

Question 6

The logic function implemented by the circuit shown below is

Question 7

The input A and clock applied to the D flip-flop are shown in figure below. The output Q is

 
          

Question 8

A certain 12 bit BCD digital to analog converter has full scale reading of 10.24 V. The step size of converter is
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Jun 9ESE & GATE EC