Consultadd is a tech company established in 2013 in New York. It was a pool campus drive. They took a coding test first. They asked 2 questions for the coding test and it was a pen-paper test. The 2 questions were from leetcode. One question was easy and the other was a medium question from leetcode.

ROUND 1

• Largest subarray with an equal number of 0s and 1s [Easy]

Example

Input: arr[] = {1, 0, 1, 1, 1, 0, 0}

Output: 6

(length of the largest subarray [0,1,1,1,0,0])

Input: arr[] = {1, 1, 1, 1}

Output: No such subarray

• Given an array of strings strs, group the anagrams together. [Medium]

Example

Input: strs = [“eat”,”tea”,”tan”,”ate”,”nat”,”bat”]

Output: [[“bat”],[“nat”,”tan”],[“ate”,”eat”,”tea”]]

I cleared the coding test. They have 2 interview rounds and 1 HR round after clearing the coding test.

I Was rejected in interview round 1.

Questions that were asked from me was

1. What is my favorite subject?
2. If we have to build an operating system what should be our requirements?
3. The interviewer asked a cross question do we need to know about DSA?
4. What are the types of OS?
5. The time complexity of Array and LinkedList?
6. I have a server in which continuous data is coming now I will use array or linked list?
7. Difference between Encapsulation and Abstraction?
8. What are Run-time and Compile-time Polymorphism? Is inheritance compulsory for polymorphism?
9. What is searching? Differentiate Linear Search and Binary Search.
10. Differentiate between Primary Key and Composite Primary Key?
11. Types of relationships in Database?
12. Explain many to many relationships in RDBMS
13. I have an array with 10 elements and I have an LinkedList with 10 elements in it. What will the time complexity be if I delete the 5th element from both?

So, I was rejected in this round only and didn’t have any further experience in the round 2 and HR rounds. But I heard that they asked Leetcode’s 2 medium and 1 hard questions.