Which package in Go is commonly used to create an HTTP server?
- fmt
- ioutil
- net/http
- os
In Go, the net/http package is commonly used to create an HTTP server. It provides functionalities to handle HTTP requests and responses effectively.
The _______ framework in Go provides features like test parallelization and subtests for organizing tests.
- Ginkgo
- Gomega
- Gotest
- Gunit
Gotest, the standard testing framework in Go, offers built-in support for test parallelization and subtests. These features help in writing efficient and well-organized test suites in Go applications.
The _______ method in the database/sql package is used to close a database connection.
- Close
- Shutdown
- End
- Disconnect
The correct option is "Close". In Golang's database/sql package, the Close method is used to gracefully close a database connection, releasing any resources associated with it. It's essential for efficient resource management.
Can a Go interface have fields?
- Depends on the implementation
- No
- Only if it's a pointer
- Yes
No, a Go interface cannot have fields. It only defines a set of methods that a concrete type must implement.
Your team has achieved 80% code coverage, but you're encountering difficulties in increasing it further. What strategies would you employ to overcome this challenge?
- Conduct code reviews with a focus on test coverage and encourage peer collaboration to identify testing gaps.
- Identify areas of the code that are difficult to test, such as external dependencies or tightly coupled components, and refactor them for better testability.
- Implement mutation testing to identify gaps in the existing test suite and improve test effectiveness.
- Invest in training and workshops for team members to enhance their understanding of testing principles and best practices.
Refactoring code for better testability can make it easier to write comprehensive tests, while mutation testing can help uncover weaknesses in the existing test suite, leading to improvements in overall coverage. Training and workshops can also empower team members to write better tests and understand the importance of thorough testing practices.
What does mocking help achieve in unit testing?
- Bypassing the need for unit tests
- Faster execution of tests
- Introduction of bugs
- Isolation of code under test
Mocking in unit testing helps achieve the isolation of the code under test by simulating the behavior of dependencies. This isolation ensures that tests focus only on the specific functionality being tested, without interference from external factors. It helps in writing more reliable and effective unit tests.
The '_____' operator in Go is used to shift bits to the right.
- <<
- <<<
- >>
- >>>
The correct operator to shift bits to the right in Go is the right shift operator ('>>'). This operator shifts the bits of the left operand to the right by the number of positions specified by the right operand.
The _________ package in Go allows you to load Go packages dynamically.
- dynamic
- loader
- package
- reflect
The reflect package in Go allows you to inspect the structure of variables at runtime and manipulate them in various ways. It provides functions to examine the type and value of variables, create new variables of arbitrary types, and call methods dynamically. One of its uses is to load and examine Go packages dynamically, enabling functionalities like plugin systems and dynamic code loading.
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.
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.
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.
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.