Blinkit SDE-2 Interview Questions, Process, and Tips

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Q1. System design of notification system
Ans. 
Design a scalable notification system for sending real-time alerts to users.
• Use a distributed system to handle high volume of notifications.

• Implement message queues for asynchronous processing.

• Utilize push notifications for mobile devices.

• Include a user preference system for customizing notification settings.

• Consider implementing a notification history feature for users to view past alerts.
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Q1. System design of google pay
Ans. 
Google Pay is a digital wallet platform and online payment system developed by Google.
• Google Pay uses secure tokenization to protect user's payment information.

• It integrates with various payment methods like credit/debit cards, UPI, and NFC.

• The system handles transactions, user authentication, and merchant integrations.

• Google Pay leverages Google's infrastructure for scalability and reliability.

• It provides features lik
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It was a leetcode medium, related BFS,

Q1. Basic of android like fragment activity communication
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Q2. Why ViewModel is necessary, how does it save state
Ans. 
ViewModel is necessary in Android development to save and manage UI-related data during configuration changes.
• ViewModel helps in retaining data during configuration changes like screen rotations

• It separates UI-related data from UI controller (Activity/Fragment)

• ViewModel survives configuration changes and can be shared between fragments

• It helps in maintaining data consistency and prevents memory leaks

• ViewModel is lifecy...read more
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Q1. Data Structures and Algorithms
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Q1. Machine Coding round
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Q1. What is clousers
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Q2. What is promises
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Q1. Explain javascript architecture
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Q2. What is mvvm architecture
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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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Q1. Given a string remove the vowels and make the first letter of each word of the string in capital letter/ uppercase.
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Q1. Usual HR questions and salary discussion
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2 question of DSA (easy, medium) in 60 minutes

Q1. Playlist Shuffle
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Q2. Deletion in min heap
Ans. 
Deletion in min heap involves removing the root node and rearranging the heap to maintain the min heap property.
• To delete the root node in a min heap, swap it with the last node in the heap.

• Remove the last node and then heapify the heap starting from the root to maintain the min heap property.

• Example: If the min heap is [10, 20, 30, 25, 40], after deletion the heap becomes [20, 25, 30, 40].
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