How does Gorm handle transactions in Go applications?
- Automatically manages transactions internally
- Doesn't support transactions by default
- Relies on native SQL transactions
- Using the Begin, Commit, and Rollback methods
Gorm handles transactions in Go applications by providing methods like Begin, Commit, and Rollback to manually manage transactions. Transactions ensure that a group of database operations either all succeed or fail together, maintaining data consistency.
Which data type in Go is used to represent a sequence of bytes?
- array
- byte
- slice
- string
In Go, the 'byte' data type is used to represent a sequence of bytes. It is an alias for uint8 and is commonly used when dealing with binary data or when representing ASCII characters.
Your team is new to Go programming, and you want to introduce a testing framework that is easy to learn and provides clear and concise test output. Which testing framework would be most suitable for this scenario?
- Convey
- Gomega
- Testify
- Testing
GoConvey is an excellent choice for teams new to Go programming. It comes with a simple syntax that closely resembles plain English, making it easy to write and understand tests. Additionally, GoConvey provides a web-based UI that displays test results in a visually appealing and easy-to-understand manner, which can be beneficial for teams getting started with testing in Go.
In a database transaction, what is the role of the "commit" operation?
- To lock the database for exclusive access
- To permanently apply the changes made in the transaction to the database
- To retrieve data from the database
- To undo the changes made in the transaction
The "commit" operation in a database transaction is responsible for permanently applying the changes made within the transaction to the database. Once a transaction is committed, the changes become visible to other transactions, and they are durably stored in the database, ensuring data persistence. Committing a transaction signifies that all its operations have been successfully completed and are ready to be made permanent.
The behavior of the _______ statement in Go can be replicated using if-else chains, but switch statements provide a cleaner and more concise way to express such conditions.
- case
- choose
- select
- switch
In Go, the 'switch' statement provides a more concise and readable way to express conditions compared to if-else chains. Although similar behavior can be achieved using if-else chains, switch statements are preferred for their cleaner syntax and better readability.
What is the purpose of the 'defer' keyword in Go?
- Defer is used to declare global variables.
- Defer is used to delay the execution of a statement until the surrounding function returns.
- Defer is used to force a function to terminate.
- Defer is used to handle panics in Go.
The 'defer' keyword in Go allows postponing the execution of a function call until the surrounding function returns. It's commonly used for cleanup activities or closing resources after a function exits.
The json.Unmarshal function in Go takes a slice of bytes representing JSON data and a ________ to decode into.
- string
- map
- struct
- byte
The correct answer is option 3, "struct". The json.Unmarshal function in Go decodes JSON data from a []byte slice into a Go data structure specified by a struct into which the data will be decoded.
Slices in Go are _______ types.
- array
- pointer
- reference
- value
Slices in Go are reference types. Unlike arrays, which are value types, slices are references to a contiguous segment of an array, allowing for dynamic sizing and sharing data between different slices.
Can a struct contain methods?
- No, a struct cannot contain methods
- Yes, a struct can contain methods as associated functions
- Yes, but only anonymous methods
- Yes, but only predefined methods
In Go, a struct can contain methods as associated functions. These methods are defined with a receiver, which allows them to be called on instances of the struct type.
_______ function is used to report memory allocations during benchmark execution.
- Allocs()
- BenchmarkAllocations()
- MemoryStats()
- ReportAllocs()
In Go benchmarking, the testing package provides the ReportAllocs() function to report memory allocations during benchmark execution, aiding in memory profiling.