ADVANCE QUESTIONS IN VLSI

Q-If not into production, how far did you follow the design and why did not you see it into

production?

Q-What was your role in the silicon evaluation/product ramp? What tools did you use?

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

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

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

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

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

VLSI INTERVIEWS QUESTIONS WITH ANSWERS

Q-WHAT IS THE DIFFERENCE BETWEEN TESTING AND VERIFICATION OF VLSI CIRCUIT?

ANS-Verification is a front end process and testing is a post

silicon process. verification is to verify the functionality of the design during the design cycle. Testing is find manufacturing faults.

    Re: What is  the difference between fifo and the memory?  Answer
# 1 
We can build FIFO using memory blocks (at a more granular level using a series of registers). One of the structure we can use for storing and retrieving data would be FIFO(First In First Out). Other structure could be a Stack which is a First In Last out kind of implementation. Similarity between them is that they are used of data storage.
Q- What is the most complicated/valuable program you written in C/C++? 

ANS-Animation of running train.

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

ANS-jigs and fixtures

O-What types of high speed CMOS circuits have you designed?

ANS-Dynamic CMOS ckts and high speed multipliers using BOOTh/Mod-Booth algorithm.

Q-Are you familiar with VHDL and/or Verilog?

ANS-Verilog is Hardware Description Language VHDL : Very (High Speed Integrated Circuit) Hardware Description Language
Q- What is the difference between = and == in C?

ANS-= is used for assigning the value to a variable

for example int a=10; if a=5 printf("%d",a); else printf("%d",a);  output:5 in this program a value is assigned to 5 and 5 is printed.  whereas == is used to check the value of the variable for example int a=10; if a==5 printf("%d",++a); else printf("%d",a);  output:10  in this value of a is checked with 10 .If it is equal if  stmt is true and a is incrementd and printed. If it is not equal a value is printed.