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Exam 1z0-809 topic 1 question 19 discussion

Actual exam question from Oracle's 1z0-809
Question #: 27
Topic #: 2
[All 1z0-809 Questions]

You want to create a singleton class by using the Singleton design pattern.
Which two statements enforce the singleton nature of the design?

  • A. Make the class private.
  • B. Make the constructor equals() and hashCode() methods of the java.lang.Object class.
  • C. Override static reference to point to the single instance.
  • D. Use a Serializable interface.
  • E. Implement the
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Suggested Answer: AB 🗳️
by M_Jawad at Jan. 14, 2020, 12:32 p.m.

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M_Jawad
Highly Voted 4 years, 6 months ago
B. Make the constructor private. D. Use a static reference to point to the single instance.
upvoted 5 times
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steefaand
Most Recent 5 months, 3 weeks ago
Selected Answer: BC
B and C are correct.
upvoted 1 times
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iSnover
5 months, 3 weeks ago
Selected Answer: BD
The answer is BD: B. Make the constructor private. D. Use a static reference to point to the single instance.
upvoted 1 times
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jduarte
3 years, 6 months ago
Answer B and C.
upvoted 1 times
...
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