Knowledge check

Completed

Answer the following questions to demonstrate what you've learned:

1.

Which of the following attempts will not cause a Rust program to panic?

Accessing an out-of-bounds index of a vector with vector[index] notation.

Accessing an out-of-bounds index of a vector with vector.get(index) notation.

Accessing an out-of-bounds index of an array with array[index] notation.

Accessing a non-existent key of a hash map with HashMap[key] notation.

2.

How can you represent the possibility of absence of a value of a given type, T, in Rust?

The Option<T> type.

The Result<T, bool> type.

A false value of the bool type.

An empty tuple: ().

3.

How can you represent the possibility of input/output (I/O) failure when you're obtaining a value of a given type, T?

The Option<T> type.

The Result<T, io::Error> type.

An empty Vec<T>.

An empty tuple: ().

You must answer all questions before checking your work.