What HTTP method is typically used for retrieving data from a server?
- DELETE
- GET
- POST
- PUT
The GET method is typically used for retrieving data from a server. It requests data from a specified resource without altering it in any way.
Mocking helps in testing individual components of a system by replacing _______ dependencies with mocks.
- Concrete
- Concrete
- External
- Real
Mocking replaces real dependencies with mock objects, which simulate the behavior of real dependencies. This separation allows for more controlled testing of individual components without the need to involve external dependencies.
In a Go application, you encounter a circular import error. How would you refactor your code to resolve this issue?
- Extract the common functionality causing the circular import into a new package
- Rename packages to break the circular dependency
- Reorder the import statements
- Use blank imports to ignore the circular dependency
Extracting the common functionality causing the circular import into a new package is a common approach to resolve circular dependencies in Go. Reordering import statements or renaming packages may not effectively address the root cause of the circular dependency and could lead to further issues. Using blank imports to ignore circular dependencies is not a recommended practice as it can obscure the code and make it harder to understand.
The '_______' function in Go unit testing is used to indicate a failed test and stop executing subsequent tests.
- Error()
- Fail()
- Fatal()
- Stop()
In Go unit testing, the Fatal() function is used to indicate a failed test and stop executing subsequent tests. When a test fails with Fatal(), it means that the test cannot continue because of the failure.
An interface in Go is a collection of _______.
- data types
- functions
- methods
- variables
In Go, an interface is defined as a collection of method signatures. It specifies what methods a type must have to implement that interface, but it does not contain any implementation itself. This enables polymorphism in Go, allowing different types to be treated interchangeably if they satisfy the interface contract.
In a Go web server, what would be the consequence of calling 'panic()' when handling an HTTP request?
- The HTTP request will be abruptly terminated, and the server will return a 500 Internal Server Error.
- The server will gracefully handle the panic, allowing the request to complete before terminating.
- The server will ignore the panic and continue processing the request.
- The server will panic and crash, bringing down all active connections and terminating the process.
Calling 'panic()' during an HTTP request handling will cause the server to panic and crash. This abrupt termination can lead to a cascading failure, affecting all active connections and potentially causing downtime. It's crucial to handle errors gracefully in HTTP servers to ensure stability and reliability. The 'panic()' function is typically reserved for exceptional situations where immediate termination is necessary, such as unrecoverable errors.
How does Go determine if two maps are equal?
- By comparing their keys and values, By comparing their lengths, By comparing their types, By comparing their elements
- By comparing their keys and values, By comparing their memory addresses, By comparing their sizes, By comparing their lengths
- By comparing their keys and values, By comparing their types, By comparing their elements, By comparing their lengths
- By comparing their sizes, By comparing their types, By comparing their elements, By comparing their values
In Go, two maps are considered equal if they have the same set of keys and values. When comparing maps for equality, Go checks whether they have identical key-value pairs. If both maps have the same keys associated with the same values, they are considered equal. This behavior is essential when working with maps in Go, ensuring correct comparison semantics.
What methods are available on the template object in Go for parsing and executing templates?
- Compile() and Execute()
- Parse() and Execute()
- ParseFiles() and Execute()
- ParseGlob() and ExecuteTemplate()
In Go, the template object provides methods like ParseFiles() for parsing templates from files and Execute() for executing parsed templates.
Type _______ in Go is used to assert the type of an interface value.
- assertion
- cast
- check
- switch
In Go, the type assertion is used to reveal the underlying concrete type of an interface. It allows you to extract the actual value stored in an interface and perform operations specific to that type. If the assertion fails at runtime, it triggers a panic, so it's essential to use it cautiously and handle potential failure cases gracefully.
You're designing a package in Go that deals with various shapes like circles, squares, and triangles. Which approach would you use to define a common behavior for these shapes?
- Use anonymous functions to encapsulate shape-specific logic.
- Use global variables to store shape information.
- Use interfaces to define a common behavior for the shapes.
- Use structs with embedded fields to inherit common behavior.
In Go, interfaces are a powerful tool for defining common behaviors across different types. By defining an interface with methods such as Area() or Perimeter(), each shape type can implement these methods according to its own logic. This approach allows for flexibility and polymorphism, enabling code to work with any shape that satisfies the interface contract. Using interfaces promotes cleaner code, decouples implementation details, and facilitates testing and extensibility.