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10+ Collabnet Software Interview Questions and Answers

Updated 5 Feb 2024

Q1. What is difference between Abstract and Interface, give me some example of your project in which you have used Abstract class and Interface.

Ans.

Abstract class and Interface are both used for abstraction, but with some differences.

  • Abstract class can have both abstract and non-abstract methods, while Interface can only have abstract methods.

  • A class can implement multiple interfaces, but can only inherit from one abstract class.

  • Abstract class can have instance variables, while Interface cannot.

  • Abstract class provides partial implementation, while Interface provides full abstraction.

  • Example of using Abstract class: Creat...read more

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Q2. What if, i need to make some changes into the POCO class to extend the entity to add some extra properties?

Ans.

Modifying the POCO class allows extending the entity with additional properties.

  • To add extra properties, simply modify the POCO class by adding new properties.

  • Ensure that the changes are reflected in the database schema if necessary.

  • Update any existing code that interacts with the POCO class to handle the new properties.

  • Consider the impact on serialization, validation, and any other relevant aspects.

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Q3. Can you write a program to show the percentage of completion while file is uploading to server?

Ans.

Yes

  • Use AJAX or WebSocket to send file data to the server

  • Track the progress of the file upload using the 'progress' event

  • Calculate the percentage of completion based on the total file size and the amount uploaded

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Q4. Write down logic of Singleton class, Why should i use it if we have Static class?

Ans.

Singleton class ensures only one instance is created, while static class allows multiple instances.

  • Singleton class restricts instantiation of a class to a single object.

  • It provides a global point of access to the instance.

  • It is useful when only one instance of a class is required throughout the system.

  • Singletons can be lazy-loaded or eagerly-loaded.

  • Static classes allow multiple instances and are not suitable for maintaining state.

  • Static classes are useful for utility function...read more

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Q5. When should i use Generics and benefits of using .Net Generic classes?

Ans.

Generics should be used when you want to create reusable code that can work with different types.

  • Generics allow you to write code that can work with different types without sacrificing type safety.

  • They provide compile-time type checking, reducing the chances of runtime errors.

  • Generics promote code reusability and maintainability by allowing you to write generic algorithms and data structures.

  • Using generic classes in .NET can improve performance by avoiding unnecessary boxing ...read more

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Q6. Have you ever worked on Entity framework, which version you have used?

Ans.

Yes, I have worked on Entity Framework.

  • I have used Entity Framework version 6.0 in my previous project.

  • I have experience in designing and implementing database models using Entity Framework.

  • I have used LINQ to query and manipulate data in Entity Framework.

  • I have also worked with migrations and code-first approach in Entity Framework.

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Q7. Which design pattern you have used, take some name and give me example from your current project.

Ans.

I have used the Observer design pattern in my current project.

  • Observer pattern is used to establish a one-to-many dependency between objects.

  • It allows multiple objects to be notified and updated automatically when a subject object changes its state.

  • In my project, we implemented the Observer pattern to notify various components of the system about changes in data.

  • For example, when a user updates their profile information, the Observer pattern is used to notify all relevant com...read more

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Q8. What is the major difference between Array and ArrayList?

Ans.

Array is a fixed-size data structure while ArrayList is a dynamic-size data structure in Java.

  • Array has a fixed length, while ArrayList can dynamically resize.

  • Array can store both primitive and object types, while ArrayList can only store object types.

  • Array uses square brackets [] for declaration, while ArrayList uses angle brackets <>.

  • Array is more memory efficient than ArrayList.

  • Array provides direct access to elements using index, while ArrayList requires methods like get(...read more

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Q9. What are the core components of .Net Framework ?

Ans.

The core components of .Net Framework include Common Language Runtime (CLR), Framework Class Library (FCL), and ASP.NET.

  • Common Language Runtime (CLR) provides the runtime environment for executing .NET applications.

  • Framework Class Library (FCL) is a collection of reusable classes, interfaces, and value types that provide access to system functionality.

  • ASP.NET is a web application framework for building dynamic web pages and web services using .NET technologies.

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Q10. Can you brief about GC and the life cycle?

Ans.

GC stands for Garbage Collection. It is an automatic memory management process in programming languages.

  • GC is responsible for reclaiming memory that is no longer in use by the program.

  • It identifies and frees up memory occupied by objects that are no longer reachable.

  • GC has different algorithms like Mark and Sweep, Copying, and Generational.

  • The life cycle of an object involves creation, usage, and eventual garbage collection.

  • GC can be triggered by various conditions like memor...read more

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Q11. What is the use of creating T4 templates?

Ans.

T4 templates are used to generate code or text files based on a template and input data.

  • T4 templates automate repetitive code generation tasks.

  • They can be used to generate code for data access layers, service layers, or UI components.

  • T4 templates can also be used to generate configuration files or documentation.

  • They provide a way to separate the logic from the generated output.

  • T4 templates support customizing the generated code based on input parameters or conditions.

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Q12. What is the page life cycle of ASP.Net?

Ans.

The page life cycle of ASP.Net is a series of events that occur when a web page is requested and processed by the server.

  • The page life cycle consists of several stages such as initialization, loading, postback handling, rendering, and unloading.

  • During the initialization stage, the page and its controls are created and their properties are set.

  • In the loading stage, the page retrieves and processes the user input and updates the control state.

  • If there is a postback, the postbac...read more

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Q13. What is SOLID?

Ans.

SOLID is a set of principles for designing software that is easy to maintain, understand, and extend.

  • S - Single Responsibility Principle: A class should have only one reason to change.

  • O - Open-Closed Principle: Software entities should be open for extension but closed for modification.

  • L - Liskov Substitution Principle: Subtypes must be substitutable for their base types.

  • I - Interface Segregation Principle: Clients should not be forced to depend on interfaces they do not use.

  • D...read more

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