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

VLSI Interview Questions

Questions Answers Views Company eMail

Insights of a Tri-State Inverter?

Intel,

3 9000

Basic Stuff related to Perl?

Intel,

2823

Have you studied buses? What types?

Intel,

5 16998

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 14113

How many bit combinations are there in a byte?

Intel,

6 12072

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

Intel,

3 11713

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

Intel,

2852

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

Intel,

1 9858

Explain the difference between write through and write back cache.

Intel,

2 19133

Are you familiar with the term MESI?

Intel,

1 11136

Are you familiar with the term snooping?

Intel,

1 10125

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

Intel,

1 18245

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

IBM, Intel, nvidia,

3 20858

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 16082

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

Intel, Zensar,

1 5648

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Un-Answered Questions { VLSI }

Draw a transistor level two input NAND gate. Explain its sizing (a) considering Vth (b) for equal rise and fall times

1663

What is Charge Sharing? Explain the Charge Sharing problem while sampling data from a Bus

1271

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

4662

Mention what are three regions of operation of mosfet and how are they used?

1082

what are three regions of operation of MOSFET and how are they used?

1242

Help with VHDL programming. Write a VHDL code for a D-Latch with clear input ?? (Hint: Set up a “Process” with appropriate sensitivity list to get the desired D-Latch with Clr working.) Inputs AND OUTPUTS: entity Lab4b is Port ( Clr, Clk, D : in STD_LOGIC; Q : out STD_LOGIC); end Lab4b;

1608

What is threshold voltage?

1186

what is the use of defpararm?

1150

Draw the stick diagram of a NOR gate. Optimize it

1293

What are the different design constraints occur in the synthesis phase?

1101

What is the function of chain reordering?

1078

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

3144

How binary number can give a signal or convert into a digital signal?

1246

Explain how logical gates are controlled by Boolean logic?

1192

Explain depletion region.

1036

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