GO Interfaces and Polymorphism 2

Question 1

Which of the following best describes polymorphism in Go?

Accepted Answer

Using interface variables to call methods on different concrete types

Answer

Method overloading by parameter count

Answer

Using generics only

Answer

Inheritance from base structs

Question 2

What happens when you call a method on a nil interface value?

Accepted Answer

Panics with 'nil pointer dereference'

Answer

Returns zero value

Answer

Calls the method on a zero-value struct

Answer

Silently does nothing

Question 3

What is the difference between a nil interface and an interface holding a nil pointer?

Accepted Answer

A nil interface has no type; an interface with a nil pointer has a type but nil value

Answer

They are identical

Answer

A nil interface panics; an interface with nil pointer does not

Answer

There is no difference in Go

Question 4

Which built-in Go function can be used to verify at compile time that a type implements an interface?

Accepted Answer

A blank identifier assignment: `var _ MyInterface = (*MyType)(nil)`

Answer

verify()

Answer

assert()

Answer

interface.Check()

Question 5

Can a value type and a pointer type both satisfy the same interface in Go?

Accepted Answer

Yes, if both define the required methods with matching receivers

Answer

No, only pointer types can satisfy interfaces

Answer

Yes, but only if they share all methods

Answer

No, receiver types must match exactly

Question 6

What does it mean for an interface to be satisfied implicitly in Go?

Accepted Answer

A type satisfies an interface without any explicit declaration, just by having the required methods

Answer

The compiler adds missing methods automatically

Answer

The interface is optional and never checked

Answer

Interfaces require a keyword to opt in