What is the maximum number of elements that can be held in a two-level B-tree of order 4?
What will be an ideal response?
A B-tree of order 4 has nodes that can hold 3 elements and have 4 children. If the tree has two levels, then
the first level is the root node, and the nodes on the second level are all leaf nodes. The total node count is 1 (root) + 4
(children), which is 5 nodes. If each node can hold 3 elements, then 5 x 3 = 15 is the maximum number of elements that can be
held in a B-tree of order 4 that has two levels.
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