Tekion SSE Interview experience

Total 4 rounds, held online

1)DSA
2)LLD
3)HLD
3)Hiring Managerial

Round 1

1. Count sub-sequences having sum of their elements equal to K
   Input: arr[] = {5, 5, 1}, K = 6
   Output: 2
   Input: arr[] = {3, 2, 5, 1, 2, 4}, K = 5
   Output: 5 | Explaination [3,2], [5], [1,4],[2,1,2],[3,2]
2. Design a data structure / class that supports the following operations in O (1) time.
   void insert(Object x): Inserts an item x to the data structure if not already present
   void remove(Object x): Removes an item x from the data structure if present
   boolean search(Object x): Searches an item x in the data structure
   Object getRandom(): Returns a random element from current set of elements

Round 2
Questions to explain:

• SOLID Principles
• Design Patterns (then specific design patterns such as Chain of Responsibility, Decorator, Observer, PubSub)
• How do you measure a system's performance

LLD: Design Meeting Scheduler.

Round 3
Had brief discussion about my experience, few questions for clarifications and details.
HLD: Design worksplace chat application like Slack

Round 4
It was discussions around projects, experience with technical and business situations and leadership scenarios. It was taken by manager.

YOE: 8 years