## Sunday, 14 February 2016

Q.1) In what all area of physical design you have worked on?

Ans) Answer to this question depends expertise and to the requirement for

which you have been interviewed.

Q.2) what all low power techniques, you have used? How low power and latest

technologies are related?

Q.3) what input vector control  leakage reduction method?

Ans) Leakage current of a gate is also input dependent. Hence, we need to find the set of inputs

which gives least leakage. By applying this minimum leakage vector decreases the leakage current of the circuit  in  standby mode.

This method also called input vector controlled method of leakage reduction.

Q.4)How can you reduce dynamic power?

Ans) -Reduce switching activity by designing good RTL

-Clock gating

-Architectural improvements

-Reduce supply voltage

-Use multiple voltage domains-Multi vdd

Q.5)What are the vectors of dynamic power?

Ans) Voltage and Current

Q.6)How will you Computes a target IR drop value in the core from the target IR drop value?

Ans) Target IR drop in the core = <target IR drop from the package-to-I/O-to-core> –<IR drop

from package to core boundary>

(IR drop from package to core boundary = <IR drop in package> + <IR drop in bonding

wires> + <IR drop at I/O cells>)・IR drop is calculated by the unit of Power Domain for

multi power voltages.

1. There is very less question

2. We are in stage in preparing this section, please refer http://www.vlsijunction.com/2016/03/physical-design-interview-question-with.html for more questions

3. Tks very much for your post.

Avoid surprises — interviews need preparation. Some questions come up time and time again — usually about you, your experience and the job itself. We've gathered together the most common questions so you can get your preparation off to a flying start.

You also find all interview questions at link at the end of this post.