Exotel Software Engineer Interview Questions and Answers

Q1. What is VTable and VPtr
Ans. 
VTable is a table of function pointers used in object-oriented programming to implement polymorphism. VPtr is a pointer to the VTable.
• VTable is used to store pointers to virtual functions in a class.

• VPtr points to the VTable of an object to enable dynamic dispatch of virtual functions.

• VTable and VPtr are used in C++ to implement polymorphism and dynamic binding.
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Q1. Technical questions that includes coding as well
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Q1. Technical and Managerial discussion
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Q1. Salary discussion
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Q1. List tuple python memory management Codig question RestAPIs HTTP methods State Management UI
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Q1. DSA based Questions- Strings, Stack and Linked List
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Q1. DSA and Conceptual Based Question
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Basic quantitative, logical reasoning along with few technical questions

Q1. Core subjects on opps, Ds, and resume based
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Q1. Tell me about yourself
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Basic Js concepts like debouncing,event loop, and other output-based questions.

Q1. Js concepts in depth
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Q1. Hiring manager round, questions around my project
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Q2. Optimization techniques
Ans. 
Optimization techniques are methods used to improve the efficiency and performance of software applications.
• Use algorithms like greedy, dynamic programming, or divide and conquer to optimize code

• Minimize time complexity by avoiding nested loops and unnecessary iterations

• Utilize data structures like hash tables, arrays, and trees for efficient storage and retrieval

• Profile code to identify bottlenecks and optimize critic...read more
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Q1. Based on Data Structures- Basic question like strings, stacks and Linked List
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Q1. This interview included DSA, Conceptual and Database Questions- It was one level harder than 1st round
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Q1. This round was with architect and it was also related to DSA and databse
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Q1. Concat two LinkedList without using any space and in O(n) time
Ans. 
Concatenate two LinkedList without using extra space in O(n) time
• Traverse the first LinkedList and update the last node's next pointer to the head of the second LinkedList

• Return the head of the first LinkedList as the concatenated LinkedList
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Q2. 2 Sql Queries -1] rank window function 2] join
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Q3. Project focused
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Q1. Discussion about Interfaces
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Q2. Discussion about Dependency Injection in .net
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Q3. Multiple .net questions
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Q1. Create Data structure to store file system like tree. it should get used for file and folder both.? find count of files in folder ?
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Q2. Redis cache system
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Q3. System designing Discussion
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Q4. Dependency Injection discussion
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Q5. Project in depth discussion
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Q1. Project Focused questions
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Q2. What are your contributions in projects
Ans. 
I have contributed to various projects by developing new features, fixing bugs, and optimizing code.
• Developed new features based on client requirements

• Fixed bugs reported by QA team

• Optimized code for better performance

• Collaborated with team members to meet project deadlines
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