GO Structs and Methods 2

Question 1

When should you prefer a pointer receiver over a value receiver for a Go method?

Accepted Answer

When the method needs to mutate the struct or when the struct is large to avoid copying

Answer

Pointer receivers are preferred when the method modifies the struct or when copying the struct would be expensive due to its size.

Question 2

What happens when you assign one struct variable to another in Go?

Accepted Answer

A shallow copy is made; the new variable is independent of the original

Answer

Structs in Go are value types, so assignment creates a shallow copy where the new variable has its own memory independent of the original.

Question 3

Which of the following correctly creates a pointer to a newly allocated struct in Go?

Accepted Answer

p := &Person{Name: "Bob"}

Answer

Using `&` before a struct literal allocates the struct on the heap and returns a pointer to it.

Question 4

What does struct embedding achieve that explicit field access does not?

Accepted Answer

Promoted methods and fields can be accessed directly without qualifying them with the embedded type's name

Answer

Struct embedding promotes the embedded type's fields and methods to the outer struct so they can be accessed without using the embedded type name as a qualifier.

Question 5

Can two structs in Go be compared with `==`? Under what condition?

Accepted Answer

Yes, if all their fields are comparable types (no maps, slices, or functions)

Answer

Go allows struct comparison with `==` only when all fields are of comparable types; structs containing maps, slices, or functions are not comparable.

GO - Golang Online Test Practice Test

GO - Golang Online Test Practice Test

GO Structs and Methods 2