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

VLSI Interview Questions

Questions Answers Views Company eMail

Explain the difference between write through and write back cache.

Intel,

2 16465

Are you familiar with the term MESI?

Intel,

2640

Are you familiar with the term snooping?

Intel,

3435

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

Intel, Sun Microsystems,

2788

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

Intel,

1 5416

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,

2628

Are you familiar with VHDL and/or Verilog?

Intel,

1 4352

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

e-tec, Intel,

3093

What work have you done on full chip Clock and Power distribution? What process technology and budgets were used?

Intel,

2839

What types of I/O have you designed? What were their size? Speed? Configuration? Voltage requirements?

Intel,

2391

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

Intel,

2276

What types of high speed CMOS circuits have you designed?

Intel,

2516

What transistor level design tools are you proficient with? What types of designs were they used on?

Intel,

3392

What products have you designed which have entered high volume production?

Intel,

2397

What was your role in the silicon evaluation or product ramp? What tools did you use?

Intel,

2262

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Un-Answered Questions { VLSI }

Are you familiar with the term snooping?

3435

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

1197

Differences between IRSIM and SPICE?

5394

What are the changes that are provided to meet design power targets?

1055

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

3079

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

2352

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

4608

What happens if we use an Inverter instead of the Differential Sense Amplifier?

2944

Explain the working of Insights of a pass gate ?

1164

What is the function of tie-high and tie-low cells?

1038

Draw the timing diagram for a SRAM Read. What happens if we delay the enabling of Clock signal?

1087

What is the ideal input and output resistance of a current source?

2954

What is the purpose of having depletion mode device?

993

Let A & B be two inputs of the NAND gate. Say signal A arrives at the NAND gate later than signal B. To optimize delay, of the two series NMOS inputs A & B, which one would you place near the output?

1401

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

2788

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