If a(n) _____ contains several lines of code that need to be repeated, you probably should use a Flat Catalog or Venetian Blind design.
Fill in the blank(s) with the appropriate word(s).
schema
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Under UNIX, files that represent a block or character device are called __________ files.
a. ordinary b. character c. special d. block
Consider hash-based evaluation of the projection operator. Assume that all buckets are about the same size but do not ?t in main memory. Let N be the size of the hash table measured in memory pages, F be the size of the original relation measured in pages, and ?<1 be the reduction factor due to projection. Estimate the number of page transfers to and from the disk needed to compute the
projection. What will be an ideal response?
________ hackers break into systems legally for non-malicious reasons such as to test system security vulnerabilities.
A. Black-hat B. Gray-hat C. White-hat D. Green-hat
How would you fix this problem?
Consider the problem of finding the K nearest neighbors of a data object. A
programmer designs Algorithm 2.1 for this task.
