A method's ____ contains all the statements in the method.
A. header
B. body
C. declaration
D. return
Answer: B
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Phase 1 of the Extended Two-Phase Commit Protocol is identical to Phase 1 of the two-phase commit protocol we have described. Phase 2 of the extended protocol is as follows:
Phase Two. If the coordinator received at least one “aborting” vote during Phase 1, it decides to abort, deallocates the transaction record from its volatile memory, sends an abort message to all cohorts that voted “ready,” and terminates the protocol. If all votes are “ready,” the coordinator enters its uncertain period, forces a willing to commit record (which contains a copy of the transaction record) to its log, and sends a commit message to each cohort. Note that the transaction is not yet committed. If a cohort receives an abort message, it decides to abort, rolls back any changes it made to the database, appends an abort record to its log, releases all locks, and terminates. If a cohort receives a commit message, it decides to commit, forces a commit record to its log, releases all locks, sends a done message to the coordinator, and terminates the protocol. The coordinator waits until it receives the first done message from a cohort. Then it decides to commit, forces a commit record to its log, and waits until it receives a done message from all cohorts. Then it writes a completion record to its log, deletes the transaction record from its volatile memory, and terminates. Describe timeout and restart procedures for this protocol. Showthat this protocol blocks only when the coordinator and at least one cohort crash (or a partition occurs) or when all cohorts crash. Give an example where the transaction aborts even though all cohorts voted “ready.” What will be an ideal response?
Write the following function that tests whether the array has four consecutive numbers with the same value.
Write a test program that prompts the user to enter a series of integers and displays true if the series contains four consecutive numbers with the same value. Otherwise, display false. Your program should first prompt the user to enter the input size, i.e., the number of values in the series. ```
In ________ implementations, small groups of a company start using the new database. Gradually, more groups come on board as the system is perfected, until the entire organization is using the new system
Fill in the blank(s) with correct word
When sorting on multiple fields with the sort command, what delimiter can be used between the field names in the search?
A. | B. $ C. ! D. ,