TCP occurs at which layer of the OSI model?
A. Layer 1
B. Layer 2
C. Layer 3
D. Layer 4
Answer: D. Layer 4
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You are given the following information about two tables, r and s.
• Table r occupies 800 pages, 20 rows per page, one of its attributes is A • Table s occupies 200 pages, 10 rows per page, one of its attributes is B • Main memory has 52 buffers • _ Table r occupies 800 pages, 20 rows per page, one of its attributes is A • _ Table s occupies 200 pages, 10 rows per page, one of its attributes is B • _ Main memory has 52 bu_ers (a) Compute the minimum cost (measured as the number of I/O operations) of a blocknested • loops join r ZA=B s. Specify how the bu_ers are used and explain your reasoning • carefully. An answer that is just a number gets no credit. (b) Assume there is an unclustered, 3-level, B+ tree index on r with search key A and that each row of s joins with 5 rows of r. Compute the cost of an index-nested loops join. Explain your reasoning carefully. An answer that is just a number gets no credit.
What Windows SIM configuration pass option deletes specific system-related information, such as customized hardware settings not needed for an image file?
A. specialize B. auditSystem C. generalize D. oobeSystem
The biometric database is a collection of numerous computer files that consist of biometric sensor readings, templates, match results, and related end-user information.
Answer the following statement true (T) or false (F)
A server failed Thursday evening before the nightly backup. The backup scheme in place was full backups every Sunday, incremental backups on Monday, Wednesday, and Friday, and differential backups on Tuesday, Thursday, and Saturday. To fully restore the server, which of the following is the LEAST amount of backup sets required?
A. One B. Two C. Three D. Four