Kuis Observer Pattern — Design Patterns

Kuis materi Observer Pattern di Design Patterns — uji pemahamanmu dengan pertanyaan pilihan ganda, penjelasan jawaban, dan skor langsung. Main gratis di Hyper Sheets.

Pertanyaan di kuis ini

  1. Kapan Observer Pattern digunakan?
  2. const emitter = new EventEmitter();
    emitter.on("greet", (name) => console.log("Hi " + name));
    emitter.on("greet", (name) => console.log("Hello " + name));
    emitter.emit("greet", "Budi");
    Apa output-nya?