One Trust Senior Software Engineer Interview Questions and Answers

Q1. 1) OOP Concepts
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Q2. Difference between Abstract class and interface
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Abstract class can have both abstract and non-abstract methods, while interface can only have abstract methods.
• Abstract class can have constructors, fields, and methods, while interface cannot have any of these.

• A class can implement multiple interfaces but can only inherit from one abstract class.

• Abstract classes are used to provide a common base for multiple classes, while interfaces are used to define a contract for ...read more
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Q3. Mysql Concepts and Mysql queries
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Q4. Logical questions on Array and String Functions in PHP
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Q5. File handling functions such as fread, fopen, fclose etc and logical string function questions on file data.
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Q1. All Scenario based questions
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Q2. OOP Concepts in deep
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OOP Concepts refer to the principles of Object-Oriented Programming, including encapsulation, inheritance, polymorphism, and abstraction.
• Encapsulation: Bundling data and methods that operate on the data into a single unit (object).

• Inheritance: Allowing a class to inherit properties and behavior from another class.

• Polymorphism: The ability for objects of different classes to respond to the same message in different ways...read more
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Q3. Software design pattern related questions
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Q4. Small Logical programs
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Q5. Database queries in deep
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Database queries involve retrieving, updating, and manipulating data stored in a database.
• Database queries are used to retrieve specific data from a database based on certain criteria.

• Queries can also be used to update existing data or insert new data into the database.

• SQL (Structured Query Language) is commonly used to write database queries.

• Examples of database queries include SELECT, INSERT, UPDATE, and DELETE state
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Q1. Java,oop, microservice, JPA
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Q2. Spring boot , MySQL
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Q1. Java, spring boot
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Q2. Microservice, rest api
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Q1. Mimic Dataframe Merge
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Implement a function to mimic the functionality of merging two DataFrames in Python.
• Create a function that takes two DataFrames as input.

• Merge the two DataFrames based on a common column or index.

• Handle different types of joins like inner, outer, left, and right joins.

• Return the merged DataFrame as output.
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Q2. Improve above case by case
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1 hour - Find longest palindromic substring

Q1. Design and code a zoo management system.
Ans. 
A zoo management system to track animals, enclosures, staff, and visitor information.
• Create classes for animals, enclosures, staff, and visitors

• Implement functions for adding, updating, and deleting records

• Include features for scheduling feeding times, cleaning enclosures, and managing staff shifts
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Standard DSA questions

Q1. Standard HR stuff.
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Q1. Current role and responsibilities
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It will be a scenario based implementation