Interview Questions for Java Developer at Moglix, Noida

Overview:

I had a scheduled interview in Moglix, Noida on july, 2017. First of all they gave me a form to fill all my personal & professional details.
There were three technical rounds. They were mostly focusing in Core Java.
The interview was good but they did not offer.

Interview Questions:

Round 1: 

  1. Describe your self
  2. How much you rate your self in core java out of 10
  3. Give a real scenario to use interface and abstract class.
  4. How many types of Design Patterns, implement singleton design pattern
  5. How indexing works in Elastic Search
  6. How to defined structure in Elastic Search
  7. There is an array which has 1 to 10 unique numbers and one number is missing. Find the missing number in O(1) complexity.
  8. What is the difference between HashMap, HashTable & ConcurrentHashMap classes.

Round 2:

  1. When you will extends Thread class
  2. How many way to create Object of any class
  3. When will you use MongoDB inplace of MySql
  4. Implement singleton design pattern using enum
  5. Reverse singly LinkedList
  6. Why wait() and notify() methods into Object class rather then Thread class
  7. Describe your project structure

Round 3: 

  1. Reverse a 2D array(column into row and row into column) without using another array.

 

Please comment your answers for above questions 😆

Location: Noida, Uttar Pradesh, India

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