OnlineSales.ai Software Development Engineer Interview Questions and Answers for Experienced

Normal DSA and sql is more then enough.

Q1. Project and subject related questions.
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Q1. Last company work profile
Ans. 
I worked as a Senior Software Engineer at XYZ Company.
• Developed and maintained software applications

• Collaborated with cross-functional teams to gather requirements and design solutions

• Implemented new features and enhancements

• Performed code reviews and provided technical guidance to junior developers

• Resolved bugs and issues reported by users

• Optimized application performance and scalability

• Participated in agile developme
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Q2. Dot Net, oracle framework, sql related qu.
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Q1. Problem Statement on Javascript Debugging, Core CSS, React Implementation questions
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Q1. Details asked regarding past projects, past experience in detail and in-depth technical questions based on past projects
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Q1. What is recursive function?
Ans. 
A recursive function is a function that calls itself within its definition.
• A recursive function must have a base case to prevent infinite recursion.

• Recursion is often used to solve problems that can be broken down into smaller, similar subproblems.

• Example: Factorial function, Fibonacci sequence.
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Q2. Difference between c and c++
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C is a procedural programming language while C++ is an object-oriented programming language.
• C is a procedural programming language, while C++ is a combination of procedural and object-oriented programming.

• C does not support classes and objects, while C++ does.

• C does not have built-in support for exception handling, while C++ does.

• C does not have namespaces, while C++ does.

• C does not have function overloading, while C++
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Q3. Inheritance and data structures?
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Q1. What are the Oops concepts
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Oops concepts are the fundamental principles of object-oriented programming, including inheritance, encapsulation, polymorphism, and abstraction.
• Inheritance: Allows a class to inherit properties and behavior from another class.

• Encapsulation: Bundling data and methods that operate on the data into a single unit.

• Polymorphism: Ability to present the same interface for different data types.

• Abstraction: Hiding the complex i...read more
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Q2. How to reverse any string
Ans. 
To reverse a string, iterate through the characters and build a new string in reverse order.
• Iterate through the characters of the string from end to start

• Append each character to a new string to build the reversed string

• Return the reversed string as the result
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Q1. DSA Structures and Tests
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Understanding of data structures and algorithms is crucial for software engineering roles.
• Knowledge of common data structures like arrays, linked lists, trees, graphs, etc.

• Understanding of algorithms like sorting, searching, dynamic programming, etc.

• Ability to analyze time and space complexity of algorithms.

• Experience in writing efficient code using data structures and algorithms.

• Familiarity with common data structure ...read more
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Q2. Question on vertx
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Q1. Some sql queries and theoritical questions about sql.
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Q2. Everything in your resume will be asked.
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20 aptitude question 10 was the cut off

There were total 9 question 3 mcq and 6 DSA question easy to moderate.

Q1. Deep discussion on javascript and project. They asked lot of questions on binary search, interviewer wants to check how strong is my basic concept is. Last question was also on binary search(HARD)
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Q1. Deep discussion about my all projects. Again asked 1 DSA question (Easy)
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Q1. This round was basically to tell me that I was selected.
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