interview questions related to placement stage:
- What is placement and what are goals of placement?
- What are the things to be checked before going to placement stage?
- What are the inputs and outputs for placement stages?
- After floorplan DEF is generated as input of placement stage what it contains?
- What are the challenges faced in placement stages?
- What are reasons of congestion in the design?
- What are the different methods of tackling congestion? Where do you find major congestion in your design?
- How do you tackle congestion in the core area? You have a region with pin density high and the router is not able to route to these pins. How to resolve this issue?
- How to tackle cell density issue?
- At what stage do you start looking at your timing reports in the PD flow?
- How will you check your timing report? What are the things you will look into it in case of timing violation?
- What are the types of placement?
- During placement stage how tool will know that your design is getting congestion without doing the actual route?
- What types of routing is carried out by the tool in placement stage global routing or virtual routing?
- What happens in global routing?
- What are the switches in place_opt command and how they are useful?
- What happens during congestion driven techniques? What are the care should be taken using congestion driven option?
- What are the types of congestion? And solution to resolve congestion?
- How to modify physical constraints to reduce the congestion?
- What happens if you over do keepout margin?
- How many blockages are there in your design, how will you define the blockages and keepout margins (halo)?
- What do you mean by logic optimization techniques and give some examples of logic optimization?
- How do you used blockages techniques to effectively reduce congestion?
- What is magnet placement?
- What is multibit banking and why we use it and what are the advantages and disadvantages of that?
- What is fan-out? What is HFN synthesis why we do it in placement stage? Can we consider clock in HFN during placement stages?
- How global route will handle congested paths?
- What do you means by scan chain reordering why we used it?
- How to qualify the placement stage?
please provide the answers of above questions . if possible please mail me .
ReplyDeleteokay wait for some time . and dont worry i will write here only all the answers.
Deleteplease provide answers as well.
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