True or false

Question

Which of the following statement is FALSE? *
1. A linked list data structure provides better memory management than arrays
2.Apart from the root element, every element in a tree has a parent and one or more children elements
3. In object-oriented programming, an object is an instance of a class.
4. None of the above

Answer 1

1. True, a linked list reserve memory and free it as needed, while with an array the size is set at creation.
2. False. Nodes may have 0 children (and those nodes are called leaves). Pretty obvious since there is no loop in a tree and the branches have to stop somewhere.
3. True by definition.