---------- Forwarded message ----------
Date: Tue, Oct 14, 2014 at 4:02 AM
Subject: Markit phone interview, full time position, 10/13/14
Date: Tue, Oct 14, 2014 at 4:02 AM
Subject: Markit phone interview, full time position, 10/13/14
Which Java package do you particularly like?
To design a cache framework, in such a scenario, you have already 50 objects in the map, that's its capacity. Now 51st object comes in, you have to remove the first object in the cache (this implies the map is sorted) to make room for the new comer. How do you go with that?
The answer is to use LinkedBlockingQueue as the map's placeholder
What's weak reference? Explain how GC works? Do you know any GC algorithm? If to choose one GC algo for your application, how do you set the JVM parameter?
Java Serialization. If there is a serializable Singleton to be wired from one JVM to another, what do you do to guarantee the other JVM to have only one instance of the Singleton class v.s multiple instances?
Threadpool. Can you set the max size of a threadpool? How do you go about it? What if the max size is 10, what will happen to the new coming task but not serviced? What is the queue used in Thread pool? What if the queue is full? Why uses block queue?
Database. How do you detect deadlock in database? How do you read Threaddump?
Database. If you were handed with a complex query running against 10 tables, and there is a performance issue, how do you proceed to resolve it? Have you used Execution plan?
