VLSI Interview Questions
Questions Answers Views Company eMail

Insights of a Tri-State Inverter?

Intel,

3 7378

Basic Stuff related to Perl?

Intel,

2397

Have you studied buses? What types?

Intel,

5 15086

Have you studied pipelining? List the 5 stages of a 5 stage pipeline. Assuming 1 clock per stage, what is the latency of an instruction in a 5 stage machine? What is the throughput of this machine ?

Intel,

4 12494

How many bit combinations are there in a byte?

Intel,

6 10100

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

Intel,

3 10154

Explain the operation considering a two processor computer system with a cache for each processor.

Intel,

2341

What are the main issues associated with multiprocessor caches and how might you solve them?

Intel,

1 9078

Explain the difference between write through and write back cache.

Intel,

2 18131

Are you familiar with the term MESI?

Intel,

1 10344

Are you familiar with the term snooping?

Intel,

1 9184

Describe a finite state machine that will detect three consecutive coin tosses (of one coin) that results in heads.

Intel,

1 16647

In what cases do you need to double clock a signal before presenting it to a synchronous state machine?

IBM, Intel, nvidia,

3 18832

You have a driver that drives a long signal & connects to an input device. At the input device there is either overshoot, undershoot or signal threshold violations, what can be done to correct this problem?

Intel,

4 14335

What are the total number of lines written by you in C/C++? What compiler was used?

Intel, Zensar,

1 4612


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Un-Answered Questions { VLSI }

Write a VLSI program that implements a toll booth controller?

3493


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

657


What is the function of chain reordering?

614


What types of high speed CMOS circuits have you designed?

2057


What happens if we delay the enabling of Clock signal?

1794






Explain what is the depletion region?

617


Design an 8 is to 3 encoder using 4 is to encoder?

860


In a SRAM layout, which metal layers would you prefer for Word Lines and Bit Lines? Why?

3585


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

3507


How do you size NMOS and PMOS transistors to increase the threshold voltage?

2527


what is SCR (Silicon Controlled Rectifier)?

620


You have three adjacent parallel metal lines. Two out of phase signals pass through the outer two metal lines. Draw the waveforms in the centre metal line due to interference. Now, draw the signals if the signals in outer metal lines are in phase with each other

948


Give various factors on which threshold voltage depends.

747


If an/ap = 0.5, an/ap = 1, an/ap = 3, for 3 inverters draw the transfer characteristics?

2004


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

1972