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44)  What will be the output of the following Java code?

• Error

• Hello

• 36

• Hello 36

44)   Encapsulation is related to:

• Inheritance

• Polymorphism

• Data hiding

• Code optimization

44)  Encapsulation promotes the use of which access modifier for class attributes that should not be directly accessed from outside the class?

• public

• protected

• package-private (default)

• private

44)  What Is an Unbounded Wildcard?

• List<?> wildcardList = new ArrayList<String>();

• public static void addDogs(List<? super Animal> list) { list.add(new Dog("tom")) }

•    public static void makeLotsOfNoise(List<? extends Animal> animals) { animals.forEach(Animal::makeNoise); }

• none

44)  What Is a Lower Bounded Wildcard?

• List<?> wildcardList = new ArrayList<String>();

• public static void addDogs(List<? super Animal> list) { list.add(new Dog("tom")) }

• public static void makeLotsOfNoise(List<? extends Animal> animals) { animals.forEach(Animal::makeNoise); }

• none

44)  What Is an Upper Bounded Wildcard?

•   List<?> wildcardList = new ArrayList<String>();

• public static void addDogs(List<? super Animal> list) { list.add(new Dog("tom")) }

• public static void makeLotsOfNoise(List<? extends Animal> animals) { animals.forEach(Animal::makeNoise); }

• none

44)  In method overriding, which keyword is used to explicitly indicate that a method is intended to override a superclass method?

 

• new

• override

• extends

• super

44)  Which of the following statements about method overloading is true?

• Overloaded methods must have the same return type.

• Overloaded methods can have the same number of parameters.

• Overloaded methods can have the same name but different parameter types.

• Overloaded methods must belong to different classes.

44)  Which of the following keywords is used to call the superclass version of an overridden method from the subclass?

• override

• super

• this

• extends

44)  In Java, polymorphism can be best described as:

• The ability of an object to take on many forms.

• The ability to perform type casting.

• The process of creating new classes.

• The implementation of multiple constructors.