RXO Inc. Senior QA Engineer Interview Questions and Answers

Regression in statistics analyzes relationships between variables to predict outcomes and understand data trends.

• Regression helps in predicting the value of a dependent variable based on one or more independent variables.

• Example: Predicting house prices based on size, location, and number of bedrooms.

• Linear regression is the simplest form, modeling the relationship as a straight line.

• Multiple regression involves multip...read more

Manual testing is the process of manually checking software for defects without automation tools.

• Involves human testers executing test cases without automation.

• Testers simulate user behavior to identify bugs and issues.

• Examples include exploratory testing, usability testing, and regression testing.

• Test cases are executed step-by-step to ensure functionality meets requirements.

• Documentation of test results is crucial fo...read more

Automation is the use of technology to perform tasks with minimal human intervention, enhancing efficiency and accuracy.

• Reduces manual effort in repetitive tasks, e.g., automated testing scripts.

• Increases speed and efficiency, such as CI/CD pipelines in software development.

• Improves accuracy by minimizing human errors, e.g., automated data entry.

• Can be applied in various fields, including manufacturing, IT, and healthc...read more

SQL (Structured Query Language) is a standard programming language for managing and manipulating relational databases.

• SQL is used to perform tasks such as querying data, updating records, and managing database structures.

• Common SQL commands include SELECT (to retrieve data), INSERT (to add new records), UPDATE (to modify existing records), and DELETE (to remove records).

• SQL supports various data types, including INTEGE...read more

OOPs stands for Object-Oriented Programming, a programming paradigm based on objects and classes.

• Encapsulation: Bundling data and methods that operate on the data within one unit (e.g., a class).

• Inheritance: Mechanism to create a new class from an existing class (e.g., a 'Dog' class inheriting from an 'Animal' class).

• Polymorphism: Ability to present the same interface for different data types (e.g., method overloading ...read more