To specify the location of a file within the Web, Web servers use a special kind of address called a uniform resource locator (URL).

Which of the following is not an ADT dictionary operation?

a. add a new entry b. retrieve an entry c. sort the entries d. traverse the entries in sorted search-key order

In a(n) ____________________ traversal, the binary tree is traversed as follows:1. Visit the node.2. Traverse the left subtree.3. Traverse the right subtree.

Fill in the blank(s) with the appropriate word(s).