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VLSI Interview Questions

Below we have listed all the VLSI Interview Questions and answers. Feel free to comment on any VLSI Interview Questions or answer by the comment feature available on the page.

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Very-large-scale integration (VLSI) is the process of creating an integrated circuit (IC) by combining thousands of transistors into a single chip. VLSI began in the 1970s when complex semiconductor and communication technologies were being developed. VLSI (very large-scale integration) is the current level of computer microchip miniaturization and refers to microchips containing in the hundreds of thousands of transistor s. LSI (large-scale integration) meant microchips containing thousands of transistors.

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What are various techniques to resolve congestion/noise?
4.5 Rating
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What would you do in order to not use certain cells from the library?
4.0 Rating
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Why power stripes routed in the top metal layers?
3.0 Rating
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What is Latch Up? Explain Latch Up with cross section of a CMOS Inverter. How do you avoid Latch Up?
3.8 Rating
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For an AND-OR implementation of a two input Mux, how do you test for Stuck-At-0 and Stuck-At-1 faults at the internal nodes? (You can expect a circuit with some redundant logic)
4.4 Rating
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What?s the difference between Testing & Verification?
4.0 Rating
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How can you model a SRAM at RTL Level?
3.0 Rating
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In a SRAM layout, which metal layers would you prefer for Word Lines and Bit Lines? Why?
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Give a big picture of the entire SRAM Layout showing your placements of SRAM Cells, Row Decoders, Column Decoders, Read Circuit, Write Circuit and Buffers
4.3 Rating
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Draw the timing diagram for a SRAM Read. What happens if we delay the enabling of Clock signal?
3.0 Rating
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What?s the critical path in a SRAM?
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How does the size of PMOS Pull Up transistors (for bit & bit- lines) affect SRAM?s performance?
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Approximately, what were the sizes of your transistors in the SRAM cell? How did you arrive at those sizes?
4.7 Rating
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Draw the SRAM Write Circuitry
4.7 Rating
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What happens if we use an Inverter instead of the Differential Sense Amplifier?
3.7 Rating
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Draw the Differential Sense Amplifier and explain its working. Any idea how to size this circuit? (Consider Channel Length Modulation)
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Draw a 6-T SRAM Cell and explain the Read and Write operations
4.8 Rating
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For a NMOS transistor acting as a pass transistor, say the gate is connected to VDD, give the output for a square pulse input going from 0 to VDD
4.3 Rating
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Why don?t we use just one NMOS or PMOS transistor as a transmission gate?
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Give the logic expression for an AOI gate. Draw its transistor level equivalent. Draw its stick diagram
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India News Network
Latest 20 Questions
An offer which is open for acceptance over a period of time is: (a) Cross Offer (b) Counter Offer (c) Standing Offer (d) Implied Offer
Specific offer can be communicated to__________ (a) All the parties of contract (b) General public in universe (c) Specific person (d) None of the above
_________ amounts to rejection of the original offer. (a) Cross offer (b) Special offer (c) Standing offer (d) Counter offer
A advertises to sell his old car by advertising in a newspaper. This offer is caleed: (a) General Offer (b) Special Offer (c) Continuing Offer (d) None of the above
In case a counter offer is made, the original offer stands: (a) Rejected (b) Accepted automatically (c) Accepted subject to certain modifications and variations (d) None of the above
In case of unenforceable contract having some technical defect, parties (a) Can sue upon it (b) Cannot sue upon it (c) Should consider it to be illegal (d) None of the above
If entire specified goods is perished before entering into contract of sale, the contract is (a) Valid (b) Void (c) Voidable (d) Cancelled
______________ contracts are also caled contracts with executed consideration. (a) Unilateral (b) Completed (c) Bilateral (d) Executory
A offers B to supply books @ Rs 100 each but B accepts the same with condition of 10% discount. This is a case of (a) Counter Offer (b) Cross Offer (c) Specific Offer (d) General Offer
_____________ is a game of chance. (a) Conditional Contract (b) Contingent Contract (c) Wagering Contract (d) Quasi Contract
There is no binding contract in case of _______ as one's offer cannot be constructed as acceptance (a) Cross Offer (b) Standing Offer (c) Counter Offer (d) Special Offer
An offer is made with an intention to have negotiation from other party. This type of offer is: (a) Invitation to offer (b) Valid offer (c) Voidable (d) None of the above
When an offer is made to the world at large, it is ____________ offer. (a) Counter (b) Special (c) General (d) None of the above
Implied contract even if not in writing or express words is perfectly _______________ if all the conditions are satisfied:- (a) Void (b) Voidable (c) Valid (d) Illegal
A specific offer can be accepted by ___________. (a) Any person (b) Any friend to offeror (c) The person to whom it is made (d) Any friend of offeree
An agreement toput a fire on a person's car is a ______: (a) Legal (b) Voidable (c) Valid (d) Illegal
"Holiday Packages" announced as an advertisement are an example of _________: (a) Offer (b) Counter Offer (c) Invitation to Offer (d) None of the above
A match fixing contract between a player and a broker is a: (a) Valid Contract (b) Unenforceable Contract (c) Void Contract (d) Illegal Contract
When a bookseller sells a book on cash payment then it is called as ___________: (a) Unilateral Contract (b) Bilateral Contract (c) Executed Contract (d) Executory Contract
____________ agreements are created by situation: (a) Written (b) Oral (c) Void (d) Implied
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