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Engin Interview Questions
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PHONE : 1. Pass by value/ pass by reference. Write a function to swap 2 variables - ll u use pass by value or reference ? 2. Do the same to swap 2 objects (how does it change) 2. Detect 11010 sequence with moore and mealy state machines. 3. Use of const ? What ll happen if you declare above 2 objects as const. 4. Explain NB assignment and blocking assignment. About event regions. 5. Fibonacci -- iterative solution and recursive solution. 6. Disadvantages of a recursive solution. 7. Output of this code fragment : reg a,b,c,d,w; assign w = a; initial begin a = 2; c=5; b<=c; a=5; end what is output of all registers. 8. Explain RISC pipeline. What is the problems. 9. Explain about uvm driver etc. ONSITE : round 1: Round Robin Arbiter Design round 2 : (1) Given a stack class implementation (LIFO) - there are 3 methods - push(), pop(), isempty(). Write a class using objects of given class to implement a FIFO. (2) Make best performance Implement the dist functionality in c++. Given a set of weights mimic to provide randomization skewed to the specification (Basically, write a function that would do something similar to a 'dist' in system verilog). round 3 : Given a divide by 3 state machine. Implement a divide by 5 statemachine. How many vectors are needed to verify it. So the circuit takes serial bit inputs and asserts if the number is a multiple of 3 or 5. round 4 : Circuits project. Basic pipeline architecture. Design a pipeline for a histogram processor. In every cycle we get an instruction (CLR, ADD INCR). Handle dependencies using bypass. round 5 : Given a producer and consumer. They are clocked with the same clock. Producer produces 80 writes for 100 clocks (no random). Consumer reads 8 times per 10 clocks. Find the FIFO depth. Write RTL and verify.
Write a function in language of your choice that takes in two strings, and returns true if they match. Constraints are as follows: String 1, the text to match to, will be alphabets and digits. String 2, the pattern, will be alphabets, digits, '.' and '*'. '.' means either alphabet or digit will be considered as a "match". "*" means the previous character is repeat 0 or more # of times. For example: Text: Facebook Pattern: F.cebo*k returns true
Given a m*n grid starting from (1, 1). At any point (x, y), you has two choices for the next move: 1) move to (x+y, y); 2) move to (x, y+x); From point (1, 1), how to move to (m, n) in least moves? (or there's no such a path)
# Question 3: # -- % Of sales that had a valid promotion, the VP of marketing # -- wants to know what % of transactions occur on either # -- the very first day or the very last day of a promotion campaign.
Given a wireless channel with loss rate 0.1, what's the throughput one can get with retransmission.
Write a recursive function to determine prime number
There is a refrigerator in a perfectly insulated room. The door is then opened. Is it an open or closed system? After a long time has passed, has the temperature in the room increased or decreased?
Consider a stack of N number of cards which are piled up and in facing down. Each card has a unique number from the range 1 to N. The card is stacked in such a way that it exhibits the following behavior: Take the first card and put it under the stack without revealing. Now the next card on the top will have the number 1 on it. Next take 2 cards one after the other and put is under the stack without revealing. Yes you guessed it right - the next card on the top will reveal a value of 2. This goes on. Eg. for such a series : 9,1,8,5,2,4,7,6,3,10 [for N=10] Write a program to generate such a series for a given N number of cards so that this behavior can be exercised.
In a given sorted array of integers remove all the duplicates.
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