An error

Nothing

The route never returns status 401.

The code lets any user log in as long as the email exists.

The code uses bcrypt correctly to compare a password with its hash.

bcrypt.compare here compares two plaintext passwords.

{greeting}

World

root

Error

Hello

World

An error

Nothing

Using && or

ternary operator inside JSX.

Only “Alice” is rendered.

Only “Loading...” is rendered.

Both “Loading...” and “Alice” are rendered.

Nothing is rendered.

It is safe because email and password are both checked in a single query.

It is secure as long as HTTPS is used.

It is vulnerable because user-controlled values are used directly in the query, allowing operators like $ne.

It correctly uses bcrypt under the hood.