A comment that appears at the bottom of the page and contains the corresponding superscript number is called a _____.
A. footer
B. note
C. reference
D. footnote
Answer: D
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Advanced Encryption Standard uses the:
a. Twofish cipher b. Reykjavík cipher c. Rijndael cipher d. Keccak cipher
With the __________ scheme, if an adversary succeeds in obtaining or computing the private key of the directory authority, the adversary could authoritatively pass out counterfeit public keys and subsequently impersonate any participant and eavesdrop on messages sent to any participant.
A. public key authority B. publicly available directory C. public key certificates D. public announcement
Estimate the number of page transfers needed to compute r s using a sort-merge join, assuming the following: A=B
1. The size of r is 1000 pages, 10 tuples per page; the size of s is 500 pages, 20 tuples per page. 2. The size of the main memory bu?er for this join computation is 10 pages. 3. The Cartesian product of matching tuples in r and s (see Figure 10.7) is computed using a block-nested loops join. 4. r.A has 100 distinct values and s.B has 50 distinct values. These values are spread around the ?les more or less evenly, so the size of ?A=c(r), where c r.A, does not vary much with c.
Assigning a “smaller” type to a “larger” type is a conversion.
a) narrowing b) shortening c) widening d) lengthening