Knowledge check

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Answer these questions to demonstrate what you've learned:

Check your knowledge

1.

Arrays are a fixed-length data type, but how can you define their size based on the data you used to initialize them?

You have to determine the number of elements when declaring the array.

You can use an ellipsis like this q := [...]int{1, 2, 3}.

You have to create a slice to define their size.

2.

A slice works with an underlying array, and arrays are fixed-sized length. What happens when you add an element to the slice and the underlying array is full?

You get a panic error.

You don't get an error, but the new element isn't added to the slice.

Go doubles the size of the underlying array.

3.

What happens when you create another slice using the slice operator s[i:j] and you make a change to an element in the new slice?

Only the slice you created gets affected because when you make a sub slice it points to a new memory address.

You can't create a sub slice, so you'd have to create a new one.

The original slice changes because a slice is simply a pointer to an underlying array.

4.

When you're iterating the elements of a map, can you access the key and its value simultaneously?

You could use the syntax for key, value := range map. to access the key and value

No, you can only access the map's values.

You can only access both the key and the value when they're the same type.

5.

Can you embed one struct into another struct?

No, because Go doesn't have support for inheritance.

Yes, and you can even access the parent properties as if it was part of the child struct.

No, you have to use two structs and repeat code as needed.

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