Carwale (Car Trade) Interview Experience for Full Stack Developer

  4 Rounds of Interviews:

• 1st: Coding
• 2nd & 3rd: Technical
• 4th: HR

1st Coding:

There were 4 questions, CoderByte was the platform used.

1st: Hard: Array:

Maximum size rectangle binary sub-array with all Is

2nd: Medium: Search:

Longest Palindrome Substring

3rd: Easy: String:

Longest substring between any pair of occurrences of similar characters

4th: Easy: String:

Print all the duplicate characters in a string

2nd Technical Round 1

This round was supposed to be based on DSA.

• What is Time Complexity? Give examples.
• What will be the time complexity to add an element to the Singly Linked List?
  • Note* there are 2 types to add an element:
• 1st: to add at the end using Tail pointer so 0(1)
• 2nd: add anywhere in the middle so O(n)
• Given an array of numbers, find the smallest Prime Number.

I had to write down the whole code.

3rd Technical Round 2

This round was supposed to be System Designs.

• Asked me about my Web Projects.
• I Implemented roles. So, how did manage my DB side?
• How did I give access to certain roles?
• How to optimize my DB?
• If I were to redo it, how will I do it?

And almost the same set of questions for another module in the project.

Database Designs.

• They asked me to draw some schema from my project, related to the above questions.
• Optimize it.
• They asked me what Indexes are.
• Query to be returned in O(n). So how will you do this?

React

• What’s the difference between using NextJs and ReactJs?
• Routing in NextJs.
• VDOM?
• Event Listeners.
• Some Hooks in NextJs.
• JSON

How to optimize JSON?

Wrote a Py code to convert optimized JSON into normal JSON.

An alternative method of storing JSON data in another DS

Last was HR

• Tell me about yourself.
• Technical Qualities.
• Professional Qualities.
• Some negative points about it
• Personal and Family Background.
• Academic history.
• Achievements and Lows during Primary and Secondary school.
• Plan for Higher studies.
• I said Yes.
• It is generally said to tell NO even if you have plans. But considering my prior responses they
• selected me.
• Commuting by Train?
  

Tips

• For the Coding round, build your logical thinking skills rather than counting how many questions
• you solved. (l solved only 17 Hackerrank questions prior to the interviews (2 days ago) that to based on array, linked list, q, stack, and tree).
• DSA is essential for Technical I; be knowledgeable. Try to use Hashmap for optimizing a specific problem.
• Regarding Technical 2 know your project inside and out, If you haven’t added anything to your project and if you don’t
• are eager to learn about it, then you are doomed for rejection. To learn about it.
• Additionally, you are aware that there are parts of the project that you could have improved the design of. Thus, research it. because they’ll ask you to make it more efficient.
• For HR, be true and honest about yourself.