Mobikwik Senior Software Engineer Interview Questions and Answers

Q1. Longest Consecutive Sequence
Ans. 
Find the length of the longest consecutive elements sequence in an array.
• Sort the array to ensure consecutive elements are adjacent

• Iterate through the array and keep track of the current consecutive sequence length

• Update the longest consecutive sequence length as you iterate
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Q2. Core Java Questions
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Q1. Executor Service and it's code
Ans. 
Executor Service is a framework provided by Java for managing and executing asynchronous tasks.
• Executor Service allows you to easily create and manage threads for executing tasks.

• It provides a way to control the number of threads used for executing tasks, which can help prevent resource exhaustion.

• You can submit tasks to an Executor Service using methods like execute() or submit().

• Executor Service can be used to execut...read more
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Q2. Core Java and Spring boot questions
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Q1. Design patterns
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Q2. Core Java questions
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Q1. Number of subset
Ans. 
Calculate the number of subsets of a given set
• The number of subsets of a set with n elements is 2^n

• Include the empty set and the set itself in the count

• For example, a set with 3 elements will have 2^3 = 8 subsets
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Q2. Remove kth node from end
Ans. 
Remove the kth node from the end of a linked list.
• Use two pointers, one to traverse the list and another to keep track of the kth node from the end.

• Once the first pointer reaches the end, the second pointer will be at the kth node from the end.

• Adjust the pointers to remove the kth node.
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Q1. Whatsapp low level design
Ans. 
Whatsapp low level design involves messaging, encryption, media sharing, and user authentication.
• Use end-to-end encryption to secure messages

• Implement message queues for real-time message delivery

• Allow media sharing through file transfer protocols

• Use OAuth for user authentication and authorization
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Q2. Lru implemention
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Q1. Aks about the few questions of dsa
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Q2. Ask about the design system
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Q1. Ask about the design system
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Q1. Find the 2nd most repetitive character in a string using streams.
Ans. 
Find the 2nd most repetitive character in a string using streams.
• Convert the string to a character array

• Use Java streams to group the characters by count

• Sort the map by values to find the 2nd most repetitive character
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Take Home assingment, 4hours. build a application

Q1. System Design , Design Twitter like System
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Q1. Build a TODO task tracking application
Ans. 
TODO task tracking application to manage tasks and deadlines
• Create a user-friendly interface for adding, editing, and deleting tasks

• Implement a feature to set deadlines and reminders for tasks

• Include categories or tags to organize tasks efficiently

• Allow users to mark tasks as completed and track progress

• Provide a search functionality to easily find specific tasks
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Q1. Data structure and algorithms
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Design splitwise - Low level machine coding round

Q1. DSA problems; 1 medium, 1 hard
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