Test your knowledge

1. The PartyWithHearable<T extends Sociable & Comparable<Sociable>, U extends Hearable> line means:

   1. The generic type constraint specifies that T must implement either the Sociable or Comparable<Sociable> interfaces, and U must implement the Hearable interface.

   2. The class is a subclass of the Sociable, Comparable<Sociable>, and Hearable classes.

   3. The generic type constraint specifies that T must implement both the Sociable and Comparable<Sociable> interfaces, and U must implement the Hearable interface.

2. Which of the following lines is equivalent to PartyWithHearable<SocialLion, Smartphone>lionsParty = new PartyWithHearable<SocialLion, Smartphone>(nala, android); in Java 9:

   1. PartyWithHearable<SocialLion, Smartphone> lionsParty = new PartyWithHearable<>(nala, android);

   2. PartyWithHearable<SocialLion, Smartphone> lionsParty = new PartyWithHearable(nala, android);

   3. let lionsParty = new PartyWithHearable(nala, android);

3. When...