Explain how Go's garbage collector works. What are some key characteristics?
- Go uses reference counting to manage memory.
- Go uses a mark-and-sweep algorithm for garbage collection.
- Go relies on manual memory management.
- Go doesn't have a garbage collector.
Go's garbage collector uses a mark-and-sweep algorithm. It starts by marking all reachable objects and then sweeping away the unmarked, unreferenced objects. Some key characteristics include concurrency (it can run concurrently with the application), low latency (it minimizes stop-the-world pauses), and generational collection (it separates objects into young and old generations). Go's garbage collector helps manage memory automatically, reducing the risk of memory leaks and manual memory management.
The _____ tool can be used to analyze the performance of Go code line-by-line.
- go-trace
- go-analyze
- go-profiler
- go-test
The go-analyze tool can be used to analyze the performance of Go code line-by-line. This tool is valuable for identifying performance bottlenecks at the code level, helping developers pinpoint areas that need optimization. It provides insights into function execution times, hot paths, and more, enabling efficient performance tuning in Go applications.
In a RESTful API, the _____ HTTP method is used to read a specific resource.
- GET
- POST
- PUT
- DELETE
In a RESTful API, the GET HTTP method is used to read a specific resource. This is a safe and idempotent operation, meaning it should not modify the resource and can be called multiple times without changing the resource's state. When a client sends a GET request to a resource's URL, the server responds with the representation of that resource, typically in the form of JSON or XML data.
What is the difference between a package and a module in Go?
- A module contains only interfaces, while a package contains concrete types.
- A module is a versioned collection of related Go packages.
- A package contains only functions, while a module contains variables and constants.
- A package is a collection of Go source files in the same directory.
In Go, a package is a collection of Go source files in the same directory that are used to organize code, whereas a module is a versioned collection of related Go packages with a go.mod file specifying dependencies.
What is the primary purpose of Protocol Buffers?
- To compress data for storage.
- To serialize structured data efficiently.
- To define database schemas.
- To encrypt data in transit.
Protocol Buffers, also known as protobuf, are a method for serializing structured data in a compact, efficient, and language-agnostic way. Its primary purpose is efficient data serialization and deserialization, making it suitable for use cases like network communication, data storage, and data interchange between different systems and languages. Protocol Buffers are not specifically designed for data compression or encryption but rather for defining a schema and serializing data in a way that allows for efficient storage and transmission.
How do you specify a specific version of a dependency using Go Modules?
- Using the 'require' directive
- Using the 'replace' directive
- Using the 'exclude' directive
- Using the 'import' directive
To specify a specific version of a dependency using Go Modules, you use the 'require' directive in the go.mod file. You list the module path and the desired version, ensuring that the version adheres to semantic versioning (SemVer). This allows Go Modules to fetch the correct version of the dependency when you build your project. This precise versioning is essential for ensuring consistency and predictability in your project's dependencies.
ASP.NET Core is a successor to which of the following frameworks?
- ASP.NET MVC
- ASP.NET Web Forms
- Classic ASP
- PHP
ASP.NET Core is a successor to the ASP.NET MVC framework. While ASP.NET Web Forms and Classic ASP were earlier web development technologies from Microsoft, ASP.NET Core represents a more modern and flexible approach to web development.
How does ASP.NET Core maintain its modularity compared to its predecessor?
- Through NuGet Packages
- Through a Monolithic Architecture
- Through Tight Coupling
- Through Proprietary Components
ASP.NET Core achieves modularity through the extensive use of NuGet packages. This means that various components and libraries are organized as packages, making it easy to update, replace, or extend specific parts of the framework without affecting the entire application. This is a significant departure from the monolithic architecture of its predecessor, which had tightly coupled components and fewer modular options.
Which method in Entity Framework Core is primarily used for tracking changes made to an entity?
- Update
- Add
- Attach
- Remove
The Attach method in Entity Framework Core is primarily used for tracking changes made to an entity. When you attach an entity, EF Core starts tracking it, and any changes made to that entity will be detected and persisted when you call SaveChanges. This is especially useful when you want to work with entities that have been detached from the context.
You notice that despite having a "Details" action method in your "Products" controller, navigating to "/Products/Details/5" results in a 404 error. What could be a probable cause?
- Incorrect route configuration
- Missing View file
- Authorization issues
- Database connectivity issues
The most probable cause of a 404 error when accessing an action method is incorrect route configuration. Ensure that the route for the "Details" action method in the "Products" controller is properly configured to accept the required parameters, such as the product ID (e.g., "{controller}/{action}/{id}").