The '_______' flag in the 'go test' command is used to display additional information about test execution.
- -d
- -info
- -v
- -verbose
The -v flag in the go test command is used to display additional information about test execution, such as the names of all tests as they are run. This can be helpful for debugging and understanding test flow.
What is the main difference between authentication and authorization?
- Authentication grants access, while authorization validates identity
- Authentication validates identity, while authorization grants access
- Authentication verifies access rights, while authorization determines identity
- Authentication verifies identity, while authorization determines access rights
Authentication is the process of verifying the identity of a user, while authorization is the process of determining what resources or actions a user is allowed to access or perform after authentication.
How does mocking help isolate dependencies in unit tests?
- By eliminating external dependencies
- By increasing test coverage
- By replacing real objects with mock objects
- By simulating external behavior
Mocking helps isolate dependencies in unit tests by replacing real objects with mock objects. These mock objects simulate the behavior of the dependencies, allowing the code under test to be evaluated in isolation. This isolation makes unit tests more reliable and easier to maintain.
What does database migration refer to in Go programming?
- Connecting Go code to a database
- Moving data between different database systems
- Updating database schemas without data loss
- Version controlling database changes
Database migration in Go programming typically refers to updating database schemas without losing data. It involves modifying the structure of the database to accommodate changes in the application's data model or requirements. This process ensures smooth transitions between different versions of the application while maintaining data integrity.
The approach to database connection pooling varies based on the _______ used by the database system.
- Algorithm
- Configuration
- Protocol
- Strategy
Different database systems employ varying strategies and protocols for connection pooling, influencing the approach and configuration settings required for optimizing performance.
A code coverage of 100% does not necessarily mean that your code is _______.
- Bug-free
- Efficient
- Error-free
- Fully functional
A code coverage of 100% does not necessarily mean that your code is bug-free. While achieving 100% code coverage is a good goal, it doesn't guarantee the absence of bugs; it only indicates that all lines of code were executed.
What type of data model does Redis primarily use?
- Column-Family
- Document
- Graph
- Key-Value
Redis primarily uses a key-value data model, where each data value is associated with a unique key. It's a popular choice for caching, session management, and real-time analytics due to its fast in-memory data storage and retrieval capabilities.
You're working on a large-scale project where multiple developers are involved, and frequent changes to the database schema are expected. How would you design and implement database migration to ensure smooth collaboration and minimize conflicts?
- Assign dedicated database migration specialists to manage conflicts
- Implement a version control system for database schema scripts
- Maintain a comprehensive documentation of database changes
- Use an automated migration tool like Flyway or Liquibase
Using an automated migration tool like Flyway or Liquibase allows for versioning of database schema scripts and automates the process of applying migrations across different environments. This ensures smooth collaboration as developers can easily track changes, apply updates, and resolve conflicts. It also minimizes conflicts by managing the order of execution of migration scripts. Dedicated specialists might not be scalable or practical, and relying solely on documentation increases the risk of human error and doesn't provide automated conflict resolution. Version control systems help in tracking changes but might not offer automated migration capabilities.
How does Go achieve implicit interface implementation?
- By using type assertions.
- By using type conversion.
- By using type embedding.
- By using type inference.
Go achieves implicit interface implementation through type embedding. In Go, if a type contains another type as a field, it automatically implements the methods of that inner type. This allows for seamless interface implementation without explicitly declaring it.
How does middleware differ from traditional request handlers in Go?
- Middleware functions are not supported in Go.
- Middleware functions are slower than traditional request handlers.
- Middleware functions only handle HTTP responses, whereas traditional request handlers handle both requests and responses.
- Middleware functions process incoming HTTP requests before passing them on to the main request handler, whereas traditional request handlers directly handle the incoming requests.
Middleware functions in Go differ from traditional request handlers as they intercept and process incoming HTTP requests before they are passed on to the main request handler. This allows for modularizing common functionalities such as logging, authentication, and error handling.