What IP address is used as a loopback address and is not a valid IP address that can be assigned to a network?
A. 128 address
B. 127 address
C. 224 address
D. 255 address
Answer: B
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Consider a relation schema, R(A, B), with the following characteristics:
a. Total number of tuples: 1,000,000 b. 10 tuples per page c. Attribute A is a candidate key; range is 1 to 1,000,000 d. Clustered B+ tree index of depth 4 on A e. Attribute B has 100,000 distinct values f. Hash index on B Estimate the number of page transfers needed to evaluate each of the following queries for each of the proposed methods: 1. ?A<3000: sequential scan; index on A 2. ?A>3000?A<3200?B=5: index on A; index on B 3. ?A=22 ? Bƒ=66: sequential scan; index on A; index on B