Question

True or False?

1. If a sorted list is empty, a call to the getNodeBefore method returns null.

2. In the SortedList implementation, the add method sets the sign of the integer it returns to indicate whether the entry exists in the list already.

3. If a class inherits a method that is inappropriate, you can override it with a method that throws an exception when called.

4. You cannot use inheritance and maintain efficiency of a base class if protected access is used to grant access to the underlying data structure.

Answer 1

Solution

1)True

2)True

3)True

4)True

Explanation

1)

If it contains nullptr, the original sorted list is empty, so the getNodeBefore returns nullptr

Hence Answer is True

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2)

In the SortedList implementation, the add method sets the sign of the integer it returns to indicate whether the entry exists in the list already.

Hence Answer is True

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3)

If a class inherits a method that is inappropriate, you can override it with a method that throws an exception when called.

for e.g

throw new UnsupportedOperationException();

Hence Answer is True

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4)

protectedaccess modifier that allows subclasses to access the data

But  we cannot maintain efficiency of a base class if protected access is used to grant access to the underlying data structure.

Hence Answer is True

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all the best