Which factors should be considered when configuring database connection pooling for optimal performance?
- Application traffic patterns
- Connection timeout
- Database server capacity
- Maximum connection pool size
When configuring database connection pooling for optimal performance, factors such as maximum connection pool size, connection timeout settings, database server capacity, and application traffic patterns should be considered. Adjusting these parameters appropriately can ensure efficient resource utilization and optimal performance in Go applications.
In a Go project, you need to create a set of HTTP handlers, each performing a specific task. Would you use anonymous functions to define these handlers? Explain your reasoning.
- No, because using anonymous functions for HTTP handlers can lead to less maintainable code, as it becomes harder to reuse handlers across different routes and refactor them when needed.
- No, because using anonymous functions for HTTP handlers can make it challenging to unit test the handlers independently and may result in less organized code structure.
- Yes, because anonymous functions provide a concise way to define handlers inline and capture the necessary context, making the code more modular and easier to manage.
- Yes, because using anonymous functions for HTTP handlers allows for inline definition of handlers, reducing boilerplate code and improving code readability by keeping related logic together.
Using anonymous functions for defining HTTP handlers in a Go project offers benefits such as reduced boilerplate code and improved readability by keeping related logic together. However, it's essential to consider trade-offs such as code maintainability and testability when deciding whether to use anonymous functions for handlers.
What is the difference between reflection and type assertion in Go?
- Reflection enables dynamic method invocation at runtime, while type assertion is used to determine the underlying type of an interface and access its value.
- Reflection is a feature in Go that allows inspection of types and values at runtime. It enables examining the metadata of a variable, such as its type, package, and kind. Type assertion, on the other hand, is a mechanism for converting an interface value to its underlying type. It is mainly used to access the concrete value stored in an interface.
- Reflection is a mechanism to check if an interface holds a specific type. It is primarily used to perform type checks at runtime. Type assertion, however, is a way to access the underlying concrete value stored in an interface.
- Reflection is only used to check the type of a variable, while type assertion is used to compare two different types in Go.
In Go, reflection allows you to inspect and manipulate variables and values at runtime, providing a way to introspect the type of variables and perform dynamic operations based on that information. Type assertion, on the other hand, is used to convert an interface value to its concrete type, allowing access to methods and fields specific to that type. Understanding the difference between these two concepts is crucial for effective use of runtime type information in Go.
In Go, the ________ interface allows you to define custom JSON marshaling and unmarshaling logic.
- CustomJSON
- JSONCustom
- JSONable
- Marshaler
The correct interface in Go that allows you to define custom JSON marshaling and unmarshaling logic is the json.Marshaler and json.Unmarshaler interfaces. By implementing these interfaces for a custom type, you can control how instances of that type are converted to JSON when marshaling and how JSON data is converted back to instances of that type when unmarshaling. This customization is useful when you need to handle special cases or non-standard JSON formatting requirements.
In Gorm, the _______ function is used to retrieve a single record based on the primary key.
- Find
- First
- Get
- Last
In Gorm, the First function is used to retrieve a single record based on the primary key. This function is particularly useful when you need to fetch a specific record based on its primary key value. It ensures efficient retrieval of data by directly querying the database using the primary key index.
The '________' function in Go is used to raise a panic with a specified message.
- panicf
- recoverf
- raise
- panicwith
The 'panic' function in Go is used to terminate normal execution of a function and begin panicking. It accepts an optional message as an argument to describe the reason for the panic.
Custom functions in Go templates are defined using the _______ method of the template object.
- AddFunc
- CustomFunc
- Define
- Funcs
Custom functions in Go templates are defined using the Funcs method of the template object. This method allows users to register custom functions that can be invoked within the template to perform specific actions or computations.
The _______ data type in Go is used to represent a pointer to any type.
- interface{}
- pointer
- uintptr
- void*
In Go, the _______ data type is represented by the interface{} type. It is used to represent a pointer to any type. This allows for dynamic typing and is commonly used in generic programming and for handling unknown types.
In Go, what is a table-driven test?
- A test that checks for table locking issues
- A test that is executed on a database table
- A test that uses a table to define inputs and expected outputs
- A test that validates database table structures
A table-driven test in Go refers to a testing technique where test cases are defined in a table-like structure, usually a slice of structs or arrays. Each entry in the table represents a unique test case with inputs and expected outputs. By using this approach, developers can easily add, modify, or remove test cases without altering the test logic. It promotes readability, maintainability, and scalability of test suites, especially when dealing with multiple scenarios.
The _______ data type in Go is used to represent a sequence of bytes.
- array
- bytes.Buffer
- slice
- string
In Go, the _______ data type is represented by the string type. A string is a sequence of bytes, commonly used for representing text data. It is immutable and UTF-8 encoded, allowing for efficient handling of text in various languages.