10+ PSA AVTEC Powertrain Interview Questions and Answers

The project architecture follows a microservices approach with a RESTful API. The flow involves data retrieval, processing, and storage.

• The project is divided into multiple microservices that communicate with each other through a RESTful API.

• Data is retrieved from various sources and processed by the microservices before being stored in a database.

• The microservices are deployed in containers using Docker and managed by Kubernetes.

• The flow involves the user interacting with th...read more

An object is a real-world entity that has state and behavior.

• Objects are instances of classes in object-oriented programming.

• They have attributes (data) and methods (functions).

• For example, a car object may have attributes like color, model, and speed, and methods like accelerate and brake.

I have used python packages like Pandas, NumPy, Matplotlib, and Scikit-learn for data manipulation, analysis, visualization, and machine learning tasks.

• Pandas - for data manipulation and analysis

• NumPy - for numerical computing

• Matplotlib - for data visualization

• Scikit-learn - for machine learning tasks

OOPS concepts refer to Object-Oriented Programming principles like Inheritance, Encapsulation, Polymorphism, and Abstraction.

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

• Encapsulation: Bundling data and methods that operate on the data into a single unit.

• Polymorphism: Ability to present the same interface for different data types.

• Abstraction: Hiding the complex implementation details and showing only the necessary features.

Polymorphism is the ability of a single function or method to operate on different types of data.

• Polymorphism allows objects of different classes to be treated as objects of a common superclass.

• There are two types of polymorphism: compile-time (method overloading) and runtime (method overriding).

• Example: Inheritance in object-oriented programming languages like Java allows for polymorphism.

• Example: Overloading a method with different parameter types is a form of compile-time ...read more

Severity refers to the impact of a bug on the system, while priority refers to the urgency of fixing it.

• Severity is the measure of how much a bug affects the system's functionality.

• Priority is the measure of how urgently a bug needs to be fixed.

• Severity is usually categorized as low, medium, high, or critical.

• Priority is usually categorized as low, medium, high, or immediate.

• For example, a bug that causes the system to crash would have high severity, but if it only affects a ...read more

Data warehousing is the process of collecting, storing, and managing data from various sources for analysis and reporting.

• Data warehousing involves extracting data from multiple sources and consolidating it into a central repository.

• It is used for data analysis, reporting, and decision-making purposes.

• Data warehouses are designed for query and analysis rather than transaction processing.

• Examples of data warehousing tools include Amazon Redshift, Snowflake, and Google BigQuery...read more

Xamarin is a cross-platform mobile app development framework that allows developers to build apps using C# and share code across multiple platforms.

• Xamarin allows developers to write code in C# and share it across iOS, Android, and Windows platforms.

• It provides access to native APIs and UI controls for each platform.

• Xamarin.Forms allows for building native UIs for each platform using a single, shared codebase.

• Xamarin also offers tools for testing, monitoring, and debugging mo...read more

CTC refers to current salary package while ECTC refers to expected salary package.

• CTC stands for Cost to Company and includes all the components of an employee's salary package such as basic salary, allowances, bonuses, etc.

• ECTC stands for Expected Cost to Company and includes the expected salary package of an employee which may include a higher basic salary, additional benefits, etc.

• CTC is the actual amount an employee is currently earning while ECTC is the amount they expec...read more

SCD type 2 stands for slowly changing dimension type 2, a method used in data warehousing to track historical data changes.

• SCD type 2 is used to maintain historical data by creating new records for changes in dimension attributes.

• It involves adding a new row to the dimension table with a new surrogate key for each change.

• The old record is marked as inactive with an end date, while the new record has a start date.

• This method allows for tracking changes over time and analyzing ...read more

STLC cycle stands for Software Testing Life Cycle, which is a series of steps performed to ensure the quality of software.

• STLC involves planning, designing, executing, and reporting on tests.

• It includes phases like requirement analysis, test planning, test design, test execution, and test closure.

• Each phase has specific objectives and deliverables to ensure the quality of the software.

• STLC helps in identifying defects early in the software development process.

• Example: In requ...read more

Bug life cycle is the process of identifying, reporting, fixing, retesting, and closing a software bug.

• Bug is identified by tester

• Bug is reported in bug tracking system

• Developer fixes the bug

• Tester retests the bug fix

• Bug is closed if fixed successfully

Dot Net Framework is a software framework developed by Microsoft for building and running applications on Windows.

• Developed by Microsoft

• Used for building and running applications on Windows

• Supports multiple programming languages like C#, VB.NET, F#

• Provides libraries and tools for developers

• Includes Common Language Runtime (CLR) and Base Class Library (BCL)

Inheritance is a concept in object-oriented programming where a class inherits attributes and methods from another class.

• Allows for code reusability and promotes the concept of 'is-a' relationship

• Derived class can access the properties and methods of the base class

• Types of inheritance include single, multiple, multilevel, hierarchical, and hybrid

• Example: Class 'Car' can inherit from class 'Vehicle' to reuse common attributes like 'color' and 'speed'

dotnet core is a free, open-source, cross-platform framework for building modern, cloud-based, and internet-connected applications.

• dotnet core is a successor to the .NET Framework, designed to be more modular and lightweight

• It supports multiple programming languages like C#, F#, and Visual Basic

• dotnet core allows developers to build applications that can run on Windows, macOS, and Linux

• It includes a runtime, libraries, and tools for building and running applications