Zolo Sdet Lead Interview Questions and Answers

First round was DSA and Projects you worked on.

Second round was DSA, Java and projects worked on

Q1. Why you want to join us?
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Q2. Why you are leaving your current org?
Ans. 
Seeking new challenges and growth opportunities.
• Looking for new challenges and opportunities for growth

• Interested in exploring different technologies and industries

• Seeking a better work-life balance

• Want to work in a more collaborative team environment
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Hackerrank - 3 questions 2 hrs

Hackerrank test with medium questions

Q1. Machine coding round to design a shopping cart
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Q1. Group anagrams , coin change problem
Ans. These are pretty basic questions from leetcode
Answered Anonymously
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Q1. Subset sum to k
Ans. 
Given an array of integers, determine if there is a subset that sums up to a given target value.
• Use a recursive approach to explore all possible subsets

• At each step, either include the current element or exclude it

• If the target value is reached, return true

• If all elements are exhausted and the target value is not reached, return false
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Q1. Discussion about work I did in previous org
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There were 2 questions in coding one with array and in string releated

Q1. About Selenium questions
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Q2. Other basic questions related to testing
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Q3. Management related question
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Q1. One program to solve
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Q2. Other questions in selenium
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Asked 2 questions on JS.
1)Publish subscribe system
2) Make toastify component

Round duration - 60 Minutes
Round difficulty - Medium

Timing was around 11 am
Environment was great, it intrigued me to join Blinkit.

Q1. 
Pair Sum Problem Statement
You are given an integer array 'ARR' of size 'N' and an integer 'S'. Your task is to find and return a list of all pairs of elements where each sum of a pair equals 'S'.
Note:
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Round duration - 60 Minutes
Round difficulty - Medium

Timing 11 am
Interviewer had good knowledge

Q1. Can you explain the activity lifecycle in Android development?
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Q2. Can you explain the fragment lifecycle in Android development?
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Q3. Can you explain the MVVM pattern?
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Round duration - 30 Minutes
Round difficulty - Easy

This round is cultural fit round

Q1. Design an Ordering system with multithreading
Ans. 
An ordering system with multithreading for efficient processing
• Use a queue data structure to store incoming orders

• Create multiple threads to process orders concurrently

• Implement synchronization mechanisms to prevent race conditions

• Consider using a thread pool to manage threads

• Use locks or semaphores to ensure thread safety
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Q1. Design a whatsapp like service
Ans. 
A messaging service with features like text, voice, video calls, group chats, and file sharing.
• Create a user-friendly interface for messaging and calling

• Implement end-to-end encryption for secure communication

• Allow users to create and join groups for group chats

• Enable file sharing for documents, images, and videos

• Provide options for voice and video calls with good quality

• Develop a notification system for new messages a
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Q1. General questions about my projects
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