Wan Buffer Services Interview Questions and Answers

Q1. Past experience & responsibilities
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Q1. Related to the operation & hiring
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Q2. Management & other things
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Q1. Basic testing questions
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Q2. Domain related questions
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Q3. Basic API and database questions
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Q1. Similar as first round
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It was basically a test on JavaScript concept, predict the output, etc

Q1. Why did you leave your previous job
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Seeking new challenges and growth opportunities in a more dynamic work environment.
• Looking for new challenges and opportunities for growth

• Seeking a more dynamic work environment

• Wanting to expand my skills and experience
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Q2. What difficult did you face in your jobs
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I faced challenges with integrating third-party APIs and customizing complex workflows.
• Difficulty in understanding and implementing complex business processes

• Troubleshooting issues with third-party integrations

• Customizing NetSuite workflows to meet specific business requirements
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Q3. How did you handle the work lead
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I handled the work lead by effectively communicating, prioritizing tasks, and seeking guidance when needed.
• Communicated regularly with the work lead to provide updates on progress and discuss any challenges

• Prioritized tasks based on deadlines and importance to ensure efficient completion

• Sought guidance from the work lead or senior team members when faced with complex issues or decisions
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It was guess the output of the pattern. And they also want to know the approach

In this test i was given a question on which i need to perform certain operation on the string.

There was coding round in php of 5 questions and 3 to be attempted

Q1. The technical round was in docker and php
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Q2. And about the frontend part of the websites
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Q1. Tell about yourself , family background, general topic
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General knowledge and logical mathematics.

Q1. 2 week training with review
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Q2. Based on your review task.
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Q1. What are oops concepts in java, explain real time scenario
Ans. 
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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