Nowfloats Technologies Senior Engineer Interview Questions and Answers

Q1. DS Algo type questions, string manipulation etc was asked and explored with more detailed questions
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Q1. In depth android, kotlin discussions and high level mapping questions
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Q1. General managerial questions and working agreements type discussion
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Basic dsa questions and java spring boot questions

Q1. Bookmyshow design
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Q2. Notification service design
Ans. 
Design a notification service for sending alerts to users.
• Use a scalable messaging system like Kafka or RabbitMQ to handle high volume of notifications.

• Implement a notification queue to ensure reliable delivery of notifications.

• Include support for different types of notifications such as email, SMS, and push notifications.

• Allow users to customize their notification preferences and frequency.

• Implement monitoring and log...read more
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Q1. Mimic Dataframe Merge
Ans. 
Implement a function to mimic the functionality of merging two DataFrames in Python.
• Create a function that takes two DataFrames as input.

• Merge the two DataFrames based on a common column or index.

• Handle different types of joins like inner, outer, left, and right joins.

• Return the merged DataFrame as output.
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Q2. Improve above case by case
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1 hour - Find longest palindromic substring

Q1. Questions on what project you worked on
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Q2. Design 2 factor authentication
Ans. 
Implementing 2 factor authentication for enhanced security
• Require users to enter their password as the first factor

• Send a unique code to the user's registered email or phone as the second factor

• Prompt the user to enter the code to complete the authentication process
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2 Leetcode medium - LRU Cache and sliding window question

Q1. Design Whatsapp
Ans. 
Design a messaging app like Whatsapp
• Implement end-to-end encryption for secure messaging

• Allow users to send text messages, images, videos, and documents

• Include features like group chats, voice and video calls, status updates

• Provide option for users to share their location

• Develop a user-friendly interface with customizable settings
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Basic of os, network snd oops

Q1. Problem solving (coding)
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Q1. Technical discussion
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Q1. HR discussion, pay discussion
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