Becton Dickinson Quality Assurance Interview Questions and Answers

Q1. Wpf C# concept and sone codes for binding
Ans. 
WPF C# is a framework for building desktop applications. Binding is a way to connect UI elements to data sources.
• WPF stands for Windows Presentation Foundation

• C# is the programming language used for WPF development

• Binding allows for automatic updates of UI elements when data changes

• Example code for binding:

• DataContext is used to set the data source for binding
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Q1. Previous project and managerial rout
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Q1. Salary expectations
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Basics of C++. Solve some problem by given complexity. Find the bugs in code.

Q1. Question from your last project.
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Q2. Design pattern in C++.
Ans. 
Design patterns in C++ are reusable solutions to common problems in software design.
• Design patterns help in creating flexible, maintainable, and scalable code.

• Examples of design patterns in C++ include Singleton, Factory, Observer, and Strategy.

• Each design pattern has a specific purpose and can be applied in different scenarios.
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Q1. Explain your project
Ans. 
Developed a web application for tracking and managing inventory in real-time
• Implemented a user-friendly interface for adding, updating, and deleting inventory items

• Utilized RESTful APIs to communicate with backend database for seamless data retrieval and storage

• Incorporated barcode scanning functionality for quick and accurate inventory management
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Q2. Write singleton pattern
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Singleton pattern ensures a class has only one instance and provides a global point of access to it.
• Create a private static instance variable of the class

• Make the constructor private to prevent instantiation from outside the class

• Provide a static method to access the instance, creating it if necessary
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Q3. Handle thread safety in singleton pattern
Ans. 
Use synchronized block or double-checked locking to ensure only one thread can access singleton instance at a time.
• Use synchronized block to ensure thread safety in getInstance() method

• Implement double-checked locking to minimize synchronization overhead

• Consider using Enum singleton for thread safety without synchronization
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Q4. What is a delegate? Write a syntax
Ans. 
A delegate is a type that represents references to methods with a specific parameter list and return type.
• Delegates are similar to function pointers in C++ or pointers to member functions in C++.

• Delegates are used to pass methods as arguments to other methods.

• Delegates can be used to define callback methods.

• Syntax: delegate return_type delegate_name(parameter_list);
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Q5. What is event ? Write a sample event
Ans. 
An event is an occurrence or happening that can be detected and responded to by software.
• Events can be user actions (clicking a button, typing in a text box)

• Events can be system-generated (timer expiration, network packet arrival)

• Events are typically handled by event handlers or listeners in software development
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Q1. About previous projects
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Q2. Basic technical questions
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Q1. 1. OOPS questions 2. SOLID and Design Pattern questions 3. Project explanation 4. Basic Pattern coding 5. Test question, UTest, ITest
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Q2. Resume discussion and question from resume skill set.
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Q1. 1. Design qestion. 2. Design pattern uses per use case.
Ans. 
Design patterns are used to solve common software design problems. Each use case requires a specific pattern.
• Design patterns are reusable solutions to common software design problems.

• Each use case requires a specific pattern to be used.

• Examples of design patterns include Singleton, Factory, and Observer.

• The choice of pattern depends on the problem being solved and the requirements of the system.
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Q1. Managerial round 1. Reason to switch. 2. Immediate joining 3. Conflict management with manager
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Q1. Salary negotiation and joining date.
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