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.
In Go, what function is used to start an HTTP server?
- http.Serve
- http.StartServer
- http.ListenAndServe
- http.Handle
The correct option is http.ListenAndServe. This function starts an HTTP server and accepts incoming connections on the specified address. It takes a network address as its parameter and a handler to handle requests.
Reflection in Go comes with _______ performance overhead compared to direct method calls.
- moderate
- negligible
- no
- significant
Reflection in Go comes with significant performance overhead compared to direct method calls. This is because reflection involves runtime type introspection and dynamic dispatch, which incur additional runtime cost compared to statically typed languages or direct method calls where the compiler can optimize the code more aggressively. Therefore, while reflection offers flexibility, it should be used judiciously, especially in performance-critical code paths.
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.
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.
Setting _______ connection limits prevents resource exhaustion in database connection pooling.
- dynamic
- fixed
- maximum
- optimized
Setting maximum connection limits prevents resource exhaustion in database connection pooling. By defining a maximum limit, the system ensures that there are not more connections than the system can handle, avoiding resource depletion.