Roche Diagnostics Senior Automation Tester Interview Questions and Answers

Q1. How do you find the code performance issue in the code deployed in production?
Ans. 
To find code performance issues in production, use monitoring tools and profiling techniques.
• Use monitoring tools like New Relic, AppDynamics, or Datadog to track performance metrics and identify bottlenecks.

• Use profiling techniques like CPU profiling, memory profiling, and network profiling to pinpoint specific areas of the code that are causing performance issues.

• Analyze logs and error messages to identify patterns a...read more
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Q2. What is asynchronous programming
Ans. 
Asynchronous programming is a programming paradigm that allows multiple tasks to run concurrently without blocking each other.
• Asynchronous programming is used to improve the performance of applications that require a lot of I/O operations.

• It involves the use of callbacks, promises, and async/await keywords in JavaScript.

• Asynchronous programming can be used in both front-end and back-end development.

• Examples of asynchro...read more
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Q3. Write a program to change background after every 0.5 sec interval to orange,white,green on button click in Angular?
Ans. 
Program to change background color on button click in Angular
• Create a button in Angular template

• Add click event listener to the button

• Use setInterval() function to change background color after every 0.5 sec

• Use ngStyle directive to change background color dynamically
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Q4. How to load a component only after 3 of my services are loaded?
Ans. 
Use Angular's 'resolve' property to load component after services are loaded.
• Create a resolver service that waits for all three services to complete before resolving.

• Add the resolver service to the 'resolve' property of the component's route.

• Access the resolved data in the component using the ActivatedRoute service.

• Example: { path: 'my-component', component: MyComponent, resolve: { data: MyResolverService } }
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Q5. What is difference between iquerable and ienumrable
Ans. 
IQueryable is for querying data from a source that implements IQueryable interface while IEnumerable is for iterating over a collection of data.
• IQueryable is used for deferred execution while IEnumerable is used for immediate execution.

• IQueryable is used for querying data from a remote data source while IEnumerable is used for querying data from an in-memory collection.

• IQueryable is more efficient for large datasets as...read more
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Q6. When you go with entity framework and ado.net
Ans. 
Entity Framework is an ORM while ADO.NET is a data access technology.
• Entity Framework is easier to use and provides more abstraction than ADO.NET.

• ADO.NET is faster and more flexible than Entity Framework.

• Use Entity Framework for simple CRUD operations and ADO.NET for complex queries and performance-critical applications.
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Q1. Explain end to end automation cycle
Ans. 
End to end automation cycle involves automating the entire software development process from planning to deployment.
• The cycle starts with requirements gathering and planning

• Next, the code is developed and tested using automation tools

• Continuous integration and delivery are used to deploy the code to production

• Monitoring and feedback are used to improve the process

• Examples of automation tools include Jenkins, Selenium,
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Q1. Why do you want to join this company.
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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
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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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