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

VLSI Interview Questions

Questions Answers Views Company eMail

While using logic design, explain the various steps that r followed to obtain the desirable design in a well defined manner?

Intel,

1 6912

Why is OOPS called OOPS? (C++)

ARM, Intel,

1 5493

What is a linked list? Explain the 2 fields in a linked list?

Intel,

1 8272

Implement a 2 I/P and gate using Tran gates?

Intel,

4008

Insights of a 4bit adder/Sub Circuit?

Intel,

3362

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

Intel,

5 14093

Explain various adders and diff between them?

Intel,

1 5496

Explain the working of 4-bit Up/down Counter?

Intel,

4433

A circuit has 1 input X and 2 outputs A and B. If X = HIGH for 4 clock ticks, A = 1. If X = LOW for 4 clock ticks, B = 1. Draw a state diagram for this Spec?

Intel,

3 9865

Advantages and disadvantages of Mealy and Moore?

Intel,

2 40694

Id vs. Vds Characteristics of NMOS and PMOS transistors?

Brillient, Intel, ISRO,

1 17183

Explain the operation of a 6T-SRAM cell?

Intel,

4511

Differences between DRAM and SRAM?

Infosys, Intel, University, Wipro,

14 72758

Implement a function with both ratioed and domino logic and merits and demerits of each logic?

Intel,

3783

Given a circuit and asked to tell the output voltages of that circuit?

Intel, Omega Healthcare,

1 5121

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Un-Answered Questions { VLSI }

What are the different ways in which antenna violation can be prevented?

1123

What is Noise Margin? Explain the procedure to determine Noise Margin?

2454

Explain about 6-T XOR gate?

1265

Draw the stick diagram of a NOR gate. Optimize it

1284

Differences between Array and Booth Multipliers?

4076

Implement a 2 I/P and gate using Tran gates?

4008

What are the Factors affecting Power Consumption on a chip?

1286

Given a layout, draw its transistor level circuit. (I was given a 3 input AND gate and a 2 input Multiplexer. You can expect any simple 2 or 3 input gates)

1200

For a single computer processor computer system, what is the purpose of a processor cache and describe its operation?

2394

What does it mean “the channel is pinched off”?

1355

What is the purpose of having depletion mode device?

1040

Write a VLSI program that implements a toll booth controller?

3984

what is SCR (Silicon Controlled Rectifier)?

1040

What is the difference between the mealy and moore state machine?

1114

Process technology? What package was used and how did you model the package/system? What parasitic effects were considered?

2329

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