Whale Cloud Senior Software Engineer Interview Questions and Answers

Q1. Database Design was asked with
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Q2. System design networking architecture data pipeline
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I had to evaluate a software and let them understand where this software could be implemented and the pros and cons of the software.

Array and OOPS concept. Given set of questions to solve with each oops concept

Q1. Out of box thinking. Given logical puzzles and ask you to analyze and provide your understanding
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Q2. Explain the inheritance concept with car model
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Inheritance in car model refers to the ability of a new car model to inherit features and characteristics from an existing car model.
• Inheritance allows for the creation of a new car model that shares common features with an existing car model

• The new car model can add or modify features inherited from the existing car model

• For example, a new sports car model can inherit features from a base car model such as engine, tra...read more
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Q3. Probability question with fruits and boxes
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Q1. Explain process for SDE
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The process for Software Development Engineer involves planning, designing, coding, testing, and deploying software solutions.
• Gather requirements from stakeholders

• Create a design based on requirements

• Write code to implement the design

• Test the software for bugs and issues

• Deploy the software for users to use

• Iterate on feedback and make improvements
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Q1. It start with technical screening.
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Q2. Exaplain about you last project role
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Q3. What is dead lock
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Deadlock is a situation in which two or more competing actions are each waiting for the other to finish, preventing any of them from completing.
• Occurs in multi-threaded or distributed systems

• Caused by resource contention and circular wait

• Can be prevented by proper resource allocation and avoiding circular wait

• Example: Process A holds resource X and waits for resource Y, while process B holds resource Y and waits for re
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Q4. What is pagination
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Pagination is the process of dividing content into separate pages to improve user experience and optimize loading times.
• Pagination is commonly used in websites to display a large amount of data in manageable chunks.

• It allows users to navigate through different pages of content, typically with 'Next' and 'Previous' buttons.

• Pagination can also include options to jump to specific pages or adjust the number of items displa...read more
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Q1. This was the final round with client in which they took interview based on skills mentioned in resume
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Q1. What are oops concepts in java, explain real time scenario
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OOPs concepts in Java include inheritance, polymorphism, encapsulation, and abstraction.
• Inheritance allows a subclass to inherit properties and methods from a superclass.

• Polymorphism allows objects to take on multiple forms and behave differently based on their context.

• Encapsulation hides the implementation details of an object and only exposes necessary information.

• Abstraction allows for the creation of abstract class...read more
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Q2. Uses of interface, inheritance
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Interfaces define contracts for behavior, while inheritance allows for code reuse and polymorphism.
• Interfaces allow for loose coupling and abstraction, enabling multiple implementations of the same behavior.

• Inheritance allows for code reuse and extension of existing classes, reducing code duplication.

• Polymorphism allows objects of different classes to be treated as if they were of the same class, simplifying code and i
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Q3. SQL query for join of tables
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SQL query for joining tables
• Use JOIN keyword to combine two or more tables based on a related column

• Specify the columns to be selected using SELECT keyword

• Use ON keyword to specify the condition for joining the tables

• Different types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL OUTER JOIN
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Q4. Java concepts used in your project
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Used Java concepts such as inheritance, polymorphism, and exception handling in my project.
• Implemented inheritance to create a base class and derived classes with specific functionalities.

• Utilized polymorphism to allow objects of different classes to be treated as if they were of the same class.

• Implemented exception handling to handle errors and prevent program crashes.

• Used interfaces to define a set of methods that a ...read more
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Q5. Overloading vs overriding, practical uses
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Overloading is having multiple methods with the same name but different parameters. Overriding is having a method in a subclass with the same name and parameters as a method in the superclass.
• Overloading is used to provide different ways to call a method with different parameters

• Overriding is used to provide a specific implementation of a method in a subclass

• Overloading is resolved at compile-time while overriding is r...read more
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Q1. I have applied for a Full Stack role in React and Node js roles. 1) Basic JS questions were asked 2) React basic to advance level question was asked. 3) DS Algo mid-level questions were asked.
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Q1. Have a normal discussion with the director and hiring manager related to the past project.
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