Persistent system interview experience

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Hello, I'm Jaya. I would like to share my persistent system interview experience.
Persistent System came into our college on 27th August 2021. It came as a pool campus drive. 
There were multiple rounds such as the written round(having multiple sections), Technical Interview, and HR round.

First-round was a written test on the SHL platform. It has four sections verbal, logical reasoning, technical questions, and coding section or automata coding. 
All the questions were easy to moderate. In the Technical section, they focus more on DSA and basic concepts of DBMS and OS.
In the coding section (Automata coding) there were two questions:-
1. given two strings we have to find the character which is missing in the second string and return it. It was easy.
2. given a large number and a small number, my task was to check this small number was present or not in the large number.

There was a sectional cut-off. There were 128 students who got shortlisted from my college including me.

My interview happened on 28th September 2021. The interviewer was very friendly. My interview was completed in almost 40 minutes. She asked basic questions such as-
  1. Introduce yourself
  2. oops concept like polymorphism, encapsulation, data abstraction, inheritance in detail
  3. types of inheritance in detail
  4. Then she asked in which language you are comfortable 
  5. pointers in c
  6. friend function
  7. difference between final, finally and finalize in Java
  8. difference between JDK, JRE, and JVM
  9. explain all keywords used to write the main method in java
  10. Difference between DBMS and RDBMS
  11. difference between call by address and call by value
  12. difference between call by address call by reference
  13. difference between local and instance variable
  14. why java is platform-independent?
  15. what is recursion
  16. write a code to find factorial of a number with recursion and without using recursion (Live coding)
  17. then she asked complexity of my code
  18. She asked why you are not using loop
  19. what is the difference between loop and recursion
  20. Later then, she asked two queries from DBMS   based to Like operator. ( _ and %)
  21.  then she gave a puzzle question:-   There are 100 balls of having same size and color. Among them 99 balls have the same weight, having lightweight. And one ball is slightly heavier than the others. So how can you find a heavier ball in minimum attempts?
  It was the last question and the interview was over. After 3 days I got mail for the HR assessment. In this assessment, there were 50 behavioral, work ethics, passion related questions. We had given 16 minutes to complete that assessment.

After HR I got the selection mail for the base package.

Tip: All the basic concepts of OOPS, DBMS, and Data Structure should be clear, and also have a basic knowledge of programming languages, be confident. 
All the best!!!
                                                    ~Jaya Kanojiya



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