Multithreading and concurrency questions are an essential part of any Java interview. If you are going for an interview with an investment bank, e.g. Barclays, Citibank, Morgan Stanley for an equities front office Java developer position, you can expect a lot of multithreading interview questions. Multithreading and concurrency are popular topics on investment banking interviews, especially on electronic trading development jobs where they grill candidates on the many tricky Java thread interview questions. They want to ensure that the candidate has a solid knowledge of multithreading and concurrent programming in Java, because most of them are in the business of performance which provides them a competitive advantage.
For example, high volume and low latency electronic trading systems, which are used for Direct to Market (DMA) trading, are usually concurrent in nature. Most of the time, they will focus on microsecond latency, which is why a good knowledge of how to effectively minimize latency and improve throughput is important.
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