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      Software Engineer - Java Developer Interview

      Jul 13, 2021
      Anonymous interview candidate
      London, England
      No offer
      Positive experience
      Average interview

      Application

      I applied through other source. I interviewed at AND Digital (London, England) in Jul 2021

      Interview

      Really nice interviewer, I would imagine the people at AND are great to work with. 3 main stages on the call (Google Hangout) 1. Brief introductions 2. Technical questions based off CV experience 3. Coding Challenge. A nice interview but I can only fault my own preparation. I focused more on the practical coding challenges and didn't bother with the theory study because I find it really boring. There was a lot to be learned through doing this interview and I'm grateful for that.

      Interview questions [14]

      Question 1

      Explain how Garbage Collection Works.
      Answer question

      Question 2

      Explain the word Synchronised in Java
      Answer question

      Question 3

      Have you ever used Trenching? explain what that does.
      Answer question

      Question 4

      Wrapper classes. Advantages and Disadvantages vs. Primitive data types
      Answer question

      Question 5

      Explain the word volatile in relation to Java
      Answer question

      Question 6

      What are they key components of Java 8 that you use on a daily basis?
      Answer question

      Question 7

      Explain Serialisation and Deserialisation and what they do.
      Answer question

      Question 8

      Explain the difference between a List and a Set.
      Answer question

      Question 9

      Explain what a HashMap does.
      Answer question

      Question 10

      What is the difference between equals() and hashCode()
      Answer question

      Question 11

      what is the difference between == and equals()
      Answer question

      Question 12

      AWS related questions: How would you use third party domain in conjunction with an AWS services? Horizontal vs. Vertical scaling. What AWS services would you use for a website? give answers for both Static and Dynamic What NoSQL database experience do you have? DynamoDB?
      Answer question

      Question 13

      Terraform Questions: Name some main terraform commands. How does terraform keep track of state of infrastructure on AWS?
      Answer question

      Question 14

      For the Coding Challenge: -in a TDD manner, create a method that will take input of some search criteria i.e. "T" and return the results from a predefined list i.e. ("BANK A", "Twitter", "Netflix", "Tesla") -implement using Java 8 features i.e. filter using Stream() -search critieria always contains the beginning of the word, make sure the function accounts for LowerCase letters and make sure if you search for BANK A that it will search the second word as well as the first
      Answer question
      7

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