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      RedDoorz

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      RedDoorz interviewsRedDoorz IOS Developer interviewsRedDoorz interview


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      IOS Developer Interview

      21 Sept 2021
      Anonymous interview candidate
      Noida
      No offer
      Positive experience
      Average interview

      Application

      I applied online. The process took 3 days. I interviewed at RedDoorz (Noida) in Sept 2021

      Interview

      The process was smooth. HR called me the next day after applying for the job. Asked some basic questions and discussed the expected CTC. Then she scheduled a Technical interview which was 2 days after. The Interviewer was on time and so was I. He started the interview with some basic questions of iOS and then a few questions on algorthims.

      Interview questions [9]

      Question 1

      What is the difference between Array and NSArray?
      Answer question

      Question 2

      What is the difference between NSArray and NSMutableArray?
      Answer question

      Question 3

      What are Generics? Can we use any other character instead of T as a placeholder?
      Answer question

      Question 4

      What are closures? What is escaping and non-escaping closures? Which one is Default?
      Answer question

      Question 5

      What are reference types and value types?
      Answer question

      Question 6

      What are Higher Order Functions?
      Answer question

      Question 7

      What is the difference between Map() and Flatmap()? Write an example code for same.
      Answer question

      Question 8

      Calculate the sum of all elements in array using a Higher Order Function.
      Answer question

      Question 9

      Write an algorithm to sort all elements in an array.
      Answer question

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