FabHotels Customer Service Engineer Interview Questions and Answers

DSA Algo questions were asked in the interview

Q1. Dsa algo questions were asked in the interview
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Code signal, DSA :Dp,Trees, Matrix.

Dp, Arrays, Graph, Java Concepts. LLD

Q1. LLD , Api Design, HLD, (Messaging system), OOPS
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Q2. Conecpts of function Programming
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Functional programming is a programming paradigm that treats computation as the evaluation of mathematical functions.
• Functions are first-class citizens

• Immutable data

• No side effects

• Higher-order functions

• Recursion

• Pure functions

• Referential transparency
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Q3. Java Memory Management
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Q1. Use of model in laravel
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Models in Laravel are used to interact with the database and represent data.
• Models in Laravel are used to perform database operations such as retrieving, inserting, updating, and deleting data.

• Models help in organizing and structuring the data in the application.

• Models in Laravel follow the MVC (Model-View-Controller) pattern.

• Example: Creating a User model in Laravel to interact with the users table in the database.
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Q2. SQL get highest salary for employee
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Q1. SQL joins and types of joins
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SQL joins are used to combine rows from two or more tables based on a related column between them.
• Types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN.

• INNER JOIN returns rows when there is at least one match in both tables.

• LEFT JOIN returns all rows from the left table and the matched rows from the right table.

• RIGHT JOIN returns all rows from the right table and the matched rows from the left table.

• F...read more
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Q2. What is self join and realted question
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Q1. Previous projects and contributions
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Q1. Basic Php ,Oops
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Q1. Security questions
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Coding and system design round

1 week assignment on hotel management to create the api and working solutions

Q1. What are the types of data.
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Types of data include numerical, categorical, ordinal, and binary.
• Numerical data includes continuous and discrete values, such as height and age.

• Categorical data includes non-numeric values, such as colors and types of fruit.

• Ordinal data includes values with a specific order, such as rankings and ratings.

• Binary data includes only two possible values, such as true/false and yes/no.
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