Wissen Infotech Interview Questions – Set 1
I have appeared for Java Developer requirement at Wissen Infotech, Bangalore Location. Requirement was for their client Morgan Stanley and it was my second technical round. It was a telephonic interview. Duration : 1 hour
What is the difference between
What is the time complexity of
- Why do we need thredpool in Java Application? (Answer)
What is the time complexity of
If Concurrency level of
ConcurrentHashMapis 4, can more than four thread read simultaneously from
Answer : Yes. Any number of threads can read concurrently from
If one thread is writing in one segment of
ConcurrentHashMap, Can other thread read from that segment?
Answer : Yes. In that case, reading thread will read last updated value as value field is volatile in
What is the difference between synchronized keyword and
ReentrantLock? Advantages of
ReentrantLockover synchronized keyword.
- What is the difference between clustered and non-clustered index?
- Print 1 to 20 numbers using two different threads concurrently.
Thread 1 prints 1, 3, 5, 7,…,19
Thread 2 prints 2, 4, 6, 8,…,20
- Find the intersection of two singly linked list?
First LinkedList : 1 -> 2 -> 3 -> 4 -> 5
Second LinkedList : 10 -> 9 -> 8 -> 7 -> 4 -> 5
Answer should be 4 i.e. both the lists are same after 4.
- I am having website which displays best three prices of the same product from different eCommerce sites.
Price of Samsung Galaxy S8 is
64000/- INR on Flipkart
60000/- INR on Amazon
66000/- INR on eBay
63000/- INR on bestBuy
67000/- INR on Infibeam
Our site should display Amazon, bestBuy and Flipkart prices for Samsung Galaxy S8.
Each e-commerce website sends frequent request for any update in price.
For processing such request we are having below method signature.
We need to implement this method such a way that we will ignore such request, if we have already received request in last one hour for the same product from the same e-Commerce site. We need to handle multiple requests concurrently.
Explain the logic or the flow of your method?
Which data structure you will use and why?
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About the Author
Tags: Collection Framework, Concurrency, Core Java, Java, Multithreading, Synchronization, Thread
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