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Logic Design Engineer interview questions shared by candidates

## Top Interview Questions

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Logic Design Engineer was asked...August 18, 2019

### You have a 4bit binary number. You wish to multiply it with decimal 24 using only combinational logic, with minimal adders.

one could store 2^4=16 lines of already made solutions in mem and get them in O(1) Less

24 decimal could be represented by: 16 + 8. Power of 2 multiplication could be done by shifting left. Therfore, we have: 24*X = 16*X + 8*X = X &amp; "0000" + X &amp; "000". In this solution we used one adder. Less

### Could you name different kinds of flip-flops?

D flip-flops, T flip-flops, JK flip-flops.

SR flip flop,D-flip flop,JK flip flop,T flip flop,master slave flip flop

Since I am not familiar with verilog function and task

### How can we use PRF to implement CMOV instruction?

Use valid bit. Make the destination valid if move is happening. Otherwise make the valid bit 0. Less

### Design a FSM for outputting x/3 without the remainder.

3 states in the FSM: A: represent remainder = 0 B: represent remainder = 1 C: represent remainder = 2 in the transitaions between states we output each time '0' or '1' according to the remainder. Less

### the elements of leakage current and how u reduce each element

with current technologies for better performance there is decreased in threshold voltage which increase leakage current flowing through various parts of transistor like subthreshold current through channel and these are increasing worth low power applications as transistor size shrinks Less

### did u always get 2nd chance in life

no.we wont always get but i will try to complete the task in the first attempt itself Less

good