Q11,paper2,June 12. B+ tree are preferred to binary tree in Database because

 Options (A) Disk capacity are greater than memory capacities

(B) Disk access is much slower than memory access

(C) Disk data transfer rates are much less than memory data transfer rate

(D) Disks are more reliable than memory

Answer (B) Disk access is much slower than memory access.

Explanation

B+ tree offers:

·         fast record search

·         fast record traversal

·         maintaining sorted tree structure without overflow pages