Oracle
1Z0-805 · Question #21
1Z0-805 Question #21: Real Exam Question with Answer & Explanation
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Question
Given: public class TemperatureSensor { public TemperatureSensor () { } public double getCurrTemp () { // . . . method to retrieve temperature from a sensor Return temp; } } Which three changes should you make to apply the singleton design pattern to this class?
Options
- AMake the class abstract.
- BAdd a method to return a singleton class type.
- CChange the access of the constructor to private.
- DAdd a public constructor that takes a single argument.
- EChange the class to implement the singleton interface.
- FAdd a private static final variable that is initialized to new TemperatureSensor{};
- GAdd a public static method that returns the class variable of type
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