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      Senior Software Engineer- Java( Backend) Interview

      Mar 16, 2024
      Anonymous Interview Candidate
      Glasgow, Scotland
      No offer
      Negative experience
      Average interview

      Application

      I applied online. The process took 2 weeks. I interviewed at Blis (Glasgow, Scotland) in Mar 2023

      Interview

      The initial chats with the recruiter and manager-to-be were good but after the technical interview I withdrew my application. The only remaining step would have been an interview with the CTO. The technical interview felt more like a quick fire pop quiz around obscure Java concepts no one ever really uses and that are irrelevant to the job. Many of the questions were asked without any context, which made them impossible to answer. I’ve asked for clarification lots of times and went back to examples from my past lots of times to make up for this. Although this was only supposed to be a technical interview, these were then followed by behavioural questions, many of them hinting that there’s a big disconnect between the tech team and management. There was no good structure to this interview and I feel like they learned almost nothing about me or my skills and I learned almost nothing about the team and the role. It also seemed that the company’s culture is lacking as the questions I had about culture were answered with details about project work and the highlight was “we can work from home”. I didn’t feel any excitement whatsoever about the company or work done from any interviewers. The role itself seemed to suggest they were looking for someone to take over the work of an entire team of contractors while also working on POCs so it seemed like long solitary hours were expected. Overall it seemed to me like the company's culture was really not great so if you're looking to interview with them, make sure to dig deep into it.

      Interview questions [17]

      Question 1

      What are your strengths and weaknesses?
      Answer question

      Question 2

      Can you describe the architecture of a project your worked on recently? What would you change about it?
      Answer question

      Question 3

      How do you ensure the quality of software delivered?
      Answer question

      Question 4

      What do you do if you need to rollback?
      Answer question

      Question 5

      How do you guarantee the security of the system?
      Answer question

      Question 6

      If you have to build an application from scratch, what are you major concerns?
      Answer question

      Question 7

      Ever find yourself in a situation where the requirement is one line and you have unrealistic timelines? Where would you compromise?
      Answer question

      Question 8

      How do you find Java's performance?
      Answer question

      Question 9

      Do you know concurrency libraries in Java (e.g. data structure implementations that are thread-safe)? Which one data structure does not support concurrency?
      Answer question

      Question 10

      What types of operations can you do on streams? (intermediate and final operations - what is the diff?)
      Answer question

      Question 11

      What happens to a stream if you never call a final operation?
      Answer question

      Question 12

      Can a stream be reused? i.e. can you try to finalise a stream twice? i.e. can you call collect on a stream twice?
      Answer question

      Question 13

      What is the difference between passing to lambdas a pure function and a closure?
      Answer question

      Question 14

      Have you ever used the lock class (ReentrantLock)? Have you ever used CountDownLatch or Barrier?
      Answer question

      Question 15

      If you run N threads, how many heaps and how many stacks are created inside the JVM?
      Answer question

      Question 16

      How do you find using annotations? Do you like it? What is the tradeoff?
      Answer question

      Question 17

      How do you make code run very fast with very little memory?
      Answer question

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