elect the correct answerWhich of the following is true about interfaces in java.1) An interface can contain following type of members.....public, static, final fields (i.e., constants)....default and static methods with bodies2) An instance of interface can be created.3) A class can implement multiple interfaces.4) Many classes can implement the same interface.Options2, 3 and 41, 2 and 41, 3 and 41, 2, 3 and 4
Question
elect the correct answerWhich of the following is true about interfaces in java.1) An interface can contain following type of members.....public, static, final fields (i.e., constants)....default and static methods with bodies2) An instance of interface can be created.3) A class can implement multiple interfaces.4) Many classes can implement the same interface.Options2, 3 and 41, 2 and 41, 3 and 41, 2, 3 and 4
Solution
The correct answer is "1, 3 and 4".
Here's why:
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An interface in Java can contain public, static, final fields (constants) and default and static methods with bodies. This is true.
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An instance of an interface cannot be created. This is false. You cannot instantiate an interface itself, but you can instantiate a class that implements an interface.
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A class can implement multiple interfaces. This is true. In Java, a class can implement any number of interfaces.
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Many classes can implement the same interface. This is true. Any number of classes can implement the same interface.
Similar Questions
An interface can contain public, static, final fields (i.e., constants) default and static methods with bodies An instance of interface can be created.A class can implement multiple interfaces. Many classes can implement the same interface.
Which of the following statements about interfaces in Java is correct? Select one: The methods specified in the interface have a body enclosed by curly brackets. They are defined with the keyword "interface." The syntax is similar to that of a class, with the difference that no methods are abstract. They are defined with the keyword "abstract."
Which statements are true for both abstract classes and interfaces? (Choose all that apply *4 pointsA. All methods within them are assumed to be abstract.B. Both can contain public static final variables.C. Both can be extended using the extend keyword.D. Both can contain default methods.E. Both can contain static methods.F. Neither can be instantiated directly.G. Both inherit java.lang.Object.
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Which of the following statements about interfaces in Java is correct? Select one: Interfaces cannot inherit from another interface. Using the keyword "extends," inheritance relationships can be defined both between classes and between interfaces. Using the keyword "implements," inheritance relationships can be defined both between classes and between interfaces. Interfaces can inherit only from one other interface.
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