A table is in ________ if it meets 2NF criteria and no transitive dependencies exist
A) third normal form
B) fourth normal form
C) fifth normal form
D) first normal form
A
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The multiple-alternative selection structure that does not use an If-Then-Else clause is the __________ or __________ statement.
Fill in the blank(s) with correct word
Consider the following two-pass strategy for crash recovery using a sharp checkpoint and physical logging: (1) The first pass is a backward pass in which active transactions are rolled back. Active transactions are identified as described in Section 22.2. The pass extends at least as far as the begin record of the oldest active transaction or the most recent checkpoint record, whichever is earlier in the log. As update records for these transactions are encountered in the scan, their before-images are applied to the database. (2) The second pass is a forward pass from the most recent checkpoint record to roll forward, using after-images, all changes made by transactions that completed since the checkpoint record was written (compensation log records are processed in the same way as
ordinary update records so that aborted transactions are handled properly). Does the procedure work? What will be an ideal response?
Provide an implementation of pthread_barrier_init and pthread_barrier_destroy to go along with the implementation of pthread_barrier_wait from Exercise 11.5. Don’t bother supporting any barrier attributes for now.
What will be an ideal response?
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Answer the following statement true (T) or false (F)