---------- Forwarded message ----------
Date: Fri, Oct 10, 2014 at 7:56 AM
Subject: Barcap onsite interview, 10/09/14
Date: Fri, Oct 10, 2014 at 7:56 AM
Subject: Barcap onsite interview, 10/09/14
Coding, no pseudo code, must be workable code. On paper.
1. Read a file, find out the occurrence of the alphanumeric letters, like "122113, Hello world", returns 1:3; 2:2; 3:1; H:1;e:1; l:3; o:2; r:1;d:1
2. find out if a string brackets come in pairs. For example, "[{}]{([])}" will return true, but "[(])" will return false;
An algo: from an array of length of n, pick up m elements randomly, m<=n. Must be no dups, meaning once an element has been picked, it can't be picked again. Best way to implement it.
In an extreme, for a length of 1000, pick up 999 elements.
A bunch of multi-choice stupid Java questions, like "What's AWT stand for"
Some designing questions, how to implement N-Tiers applications; What's its pro and cons;
What's it that you don't like about Java?
This is just some open discussion: my answer was that Java is now too huge a monster that tries to please everyone, which is against its original philosophy of simplicity. And I gave example of lamda expression, and multiple inheritance in Java 8, which is the center of debates.
Then he asked if w/o lamda, how to do functional programming in java? and my answer was that other JVM language such as Scala can do it just fine or even better since it's created for that purpose. Also since it's in JVM ecosystem it can fit in seamlessly.
How to sync up with database in Hibernate?
Discussion:
What's asynchronous IO? How to achieve highly efficient concurrent processing services.
I couldn't impress him as I didn't know it but it seems that I managed to get his attention by mentioning the emerging technologies such as Node.js, which is designed for that purpose
In a scenario, we have 10 requests being handled by all available threads in a thread pool, they are long processing tasks, thus more requests come in but can't be processed, then what? How to design an architecture that can prioritize the requests so that clients can have reasonable responsiveness.
