Phenom Quality Assurance Interview Questions and Answers

Spring is a framework for building Java applications, while Spring Boot is a tool for quickly creating Spring-based applications.

• Spring provides a comprehensive framework for building Java applications, while Spring Boot is a tool that simplifies and accelerates the process of creating Spring-based applications.

• Spring requires more configuration and setup, while Spring Boot provides a pre-configured environment that re...read more

A program to check if two strings are anagrams of each other.

• Create two character arrays from the input strings

• Sort the arrays

• Compare the sorted arrays to check if they are equal

Using Streams API to filter and map an array of strings

• Create a stream from the array using Arrays.stream()

• Use filter() to select elements that meet a certain condition

• Use map() to transform each element into a new value

• Use toArray() to convert the stream back into an array

REST API is a web service that uses HTTP requests to access and manipulate data.

• REST stands for Representational State Transfer

• It is an architectural style for building web services

• It uses HTTP methods like GET, POST, PUT, DELETE to perform operations on resources

• It is stateless and can be cached

• It returns data in various formats like JSON, XML, etc.

Reversing a string involves flipping the order of characters in a given string.

• Create an empty string to store the reversed string

• Iterate through the original string from the end to the beginning

• Append each character to the empty string

• Return the reversed string

SOLID principles are a set of five design principles for writing maintainable and scalable code.

• Single Responsibility Principle (SRP) - a class should have only one reason to change

• Open-Closed Principle (OCP) - a class should be open for extension but closed for modification

• Liskov Substitution Principle (LSP) - a subclass should be able to replace its parent class without affecting the system's behavior

• Interface Segreg...read more

Ref and out are both used for passing arguments by reference in C#. Ref is bidirectional while out is unidirectional.

• Ref and out are used to pass arguments by reference instead of by value

• Ref is used for both input and output parameters while out is only used for output parameters

• Ref requires the variable to be initialized before passing while out does not

• Example: void MyMethod(ref int x) { x = x + 1; } and void MyMeth

REST APIs are a way to interact with web services. Popular status codes include 200, 404, and 500.

• REST APIs allow clients to access and manipulate resources on a server using HTTP requests

• Common HTTP methods used in REST APIs include GET, POST, PUT, and DELETE

• Status codes indicate the success or failure of a request, with 2xx codes indicating success and 4xx/5xx codes indicating errors

• Some popular status codes include ...read more

Memory management in C# involves automatic garbage collection and the use of pointers.

• C# uses a garbage collector to automatically manage memory allocation and deallocation.

• Developers can use pointers to directly manipulate memory, but this is not recommended.

• C# also provides tools for managing memory usage, such as the IDisposable interface and the using statement.

Microservices, cloud-native, and serverless are the latest architectural trends in C#.

• Microservices architecture is gaining popularity due to its scalability and flexibility.

• Cloud-native architecture focuses on building applications that are optimized for cloud environments.

• Serverless architecture allows developers to focus on writing code without worrying about infrastructure management.

• Other trends include containeri...read more

Both .NET Core and Framework are used for developing Windows applications, but Core is cross-platform and lightweight.

• Core is open-source and modular, while Framework is a monolithic framework

• Core has better performance and scalability than Framework

• Core supports microservices architecture, while Framework does not

• Core has a smaller footprint and can be deployed as a single executable

• Framework has better backward compa

Major advancements in .NET Core include improved performance, cross-platform compatibility, and enhanced security features.

• Improved performance through the use of Span and other optimizations

• Cross-platform compatibility with support for Linux and macOS

• Enhanced security features such as runtime code generation and data protection

• Introduction of .NET Core 3.0 with support for Windows Desktop applications

• Integration with ...read more