VLSI Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

VLSI Interview Questions

Questions Answers Views Company eMail

6-T XOR gate?

Intel,

4293

Differences between blocking and Non-blocking statements in Verilog?

Intel,

5 21241

Differences between Signals and Variables in VHDL? If the same code is written using Signals and Variables what does it synthesize to?

IIT, Intel,

1 20887

Differences between functions and Procedures in VHDL?

Intel,

5 55127

What is component binding?

Intel,

2 6414

What is polymorphism? (C++)

Intel,

2 6154

What is hot electron effect?

Intel,

3 13546

Define threshold voltage?

College School Exams Tests, Intel, JHG, Wipro,

32 136111

Factors affecting Power Consumption on a chip?

Intel,

7 17564

Explain Clock Skew?

Intel, nvidia,

6 21836

Why do we use a Clock tree?

Intel,

3 13533

Explain the various Capacitances associated with a transistor and which one of them is the most prominent?

Intel,

2 8279

Explain the Various steps in Synthesis?

Intel,

3317

Explain ASIC Design Flow?

Intel, JK Associates, Mind Tree,

2 15547

Explain Custom Design Flow?

Intel,

2 7174

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Un-Answered Questions { VLSI }

What types of CMOS memories have you designed? What were their size? Speed?

3190

What is the purpose of having depletion mode device?

1101

How about voltage source?

2323

Draw a CMOS Inverter. Explain its transfer characteristics

1231

Give the logic expression for an AOI gate. Draw its transistor level equivalent. Draw its stick diagram

1535

Draw Vds-Ids curve for a MOSFET. Now, show how this curve changes with increasing Vgs.

1172

Give various factors on which threshold voltage depends.

1357

Approximately, what were the sizes of your transistors in the SRAM cell? How did you arrive at those sizes?

1201

Explain CMOS Inverter transfer characteristics?

3963

Are you familiar with the term MESI?

2832

If the current through the poly is 20nA and the contact can take a max current of 10nA how would u overcome the problem?

1181

Explain the operation of a 6T-SRAM cell?

4570

Explain the Various steps in Synthesis?

3317

Differences between Array and Booth Multipliers?

4135

For f = AB+CD if B is S-a-1, what are the test vectors needed to detect the fault?

1296

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