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Exam C2090-616 All Questions

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Exam C2090-616 topic 1 question 62 discussion

Actual exam question from IBM's C2090-616
Question #: 62
Topic #: 1
[All C2090-616 Questions]

Which isolation level will allow application A to immediately read the committed value of a row that is exclusively locked by application B?

  • A. Read Stability
  • B. Cursor Stability
  • C. Repeatable Read
  • D. Cursor Stability with WAIT FOR OUTCOME clause A
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Suggested Answer: Explanation 🗳️
Read stability (RS) locks only those rows that an application retrieves within a unit of work. It ensures that any qualifying row read during a unit of work is not changed by other application processes until the unit of work completes, and that any row changed by another application process is not read until the change is committed by that process
by db2tester at Oct. 8, 2019, 12:41 p.m.

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db2tester
5 years, 1 month ago
The good answer is "D. Cursor Stability with WAIT FOR OUTCOME clause A ". Indeed, WAIT FOR OUTCOME specifies to wait for the commit or rollback when encountering data in the process of being updated or deleted. Rows encountered that are in the process of being inserted are not skipped. Reference : https://www.ibm.com/support/knowledgecenter/en/SSEPGG_11.1.0/com.ibm.db2.luw.sql.ref.doc/doc/r0059223.html
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