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shared lock is requested using the ___________ instruction.a)lock-sharedb)lock-Xc)lock-Sd)lock-Pe)exclusive(x)

Question

shared lock is requested using the ___________ instruction.

a) lock-shared
b) lock-X
c) lock-S
d) lock-P
e) exclusive(x)

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Solution

1. Break Down the Problem

We need to identify the correct instruction to request a shared lock from the provided options.

2. Relevant Concepts

In database and computer science contexts, locking mechanisms are used to control access to data. A shared lock allows multiple transactions to read the same data while preventing any from modifying it.

3. Analysis and Detail

  • Option a) lock-shared: This suggests a specific instruction for acquiring a shared lock.
  • Option b) lock-X: Typically refers to an exclusive lock, which prevents any other transactions from accessing the locked resource.
  • Option c) lock-S: This could be another notation for a shared lock, as 'S' usually denotes shared in locking terminology.
  • Option d) lock-P: This doesn't correspond to standard instruction naming for shared locks.
  • Option e) exclusive(x): Clearly indicates an exclusive lock.

4. Verify and Summarize

The best option that aligns with requesting a shared lock is "lock-shared" or "lock-S." However, based on common terminology, "lock-S" is likely to be the intended answer.

Final Answer

The shared lock is requested using the lock-S instruction.

This problem has been solved

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