1. Which is a reserved word in the Java programming language?

A.	method	B.	native
C.	subclasses	D.	reference
E.	array

2. How many nodes does a full binary tree with 10 levels have? Note that the level that contains the root is one of the 10 levels.

Question options:

	a. 511
	b. 1024
	c. 1023
	d. 512
	e. 10

Sol283:

1. A. "method" is a reserved word in the Java programming language, used to define a block of code that performs a specific task.

2. A full binary tree is a tree in which every node has either 0 or 2 children. The number of nodes in a full binary tree with height h (i.e. h levels) is 2^(h+1) - 1. Therefore, a full binary tree with 10 levels will have 2^(10+1) - 1 = 2047 nodes.