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سؤال 15

A variable a refers to an array. Variable b is assigned a, with no new array created. What is a === b?

  1. false because arrays are mutable
  2. undefined because arrays lack equality
  3. true because both refer to one objectپاسخ درست
  4. true only when the array is empty

توضیح

Both variables refer to the same array object, so strict equality produces true. Equal-looking but separately created arrays would fail this test because object strict equality depends on shared identity.

ادامهٔ این آزمون

شروع تمرین
سؤال 15: A variable a refers to an array. Variable b is assigned a,… · JavaScript Fundamentals · Questena