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Exam 1z0-078 topic 1 question 18 discussion

Actual exam question from Oracle's 1z0-078
Question #: 18
Topic #: 1
[All 1z0-078 Questions]

Which three statements are true about services and load balancing for Oracle 19c clients connecting to Oracle 19c RAC database instances? (Choose three.)

  • A. Services support the balancing of client connections across RAC database instances.
  • B. In server-side load balancing, node listener redirects the client to another node listener for connection to an instance.
  • C. Load balancing can be done by the client or the listener, but not both, for any one connection request.
  • D. Client-side connect-time load balancing can balance connection requests across SCAN listeners.
  • E. Load balancing can be done by the client, the listener, or both, for any one connection request.
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Suggested Answer: ADE 🗳️

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Tunglinfo9
5 days, 13 hours ago
Selected Answer: ADE
B: false, not node listener, should be SCAN listener to perform redirection. C: false, both for client and listener (client/server side )
upvoted 1 times
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piontk
4 months ago
Selected Answer: ACE
Tricky question, but looks like ACE: If you configured SCAN for connection requests, then client-side load balancing is not relevant for those clients that support SCAN access. With that in mind, we can have load balancing client-side OR load balancing server-side, not both. If you are using clients that do not support SCAN (for example, the client version is pre-Oracle Database 11g release 2 (11.2)), then, to use SCAN you must change the client tnsnames.ora to include the SCAN VIPs, and set LOAD_BALANCE=ON to balance requests across the VIPs. Ref:https://docs.oracle.com/en/database/oracle/oracle-database/19/racad/workload-management-with-dynamic-database-services.html#GUID-10F7892A-92DD-482C-8D68-AE80CE956010
upvoted 1 times
FeaRoX
3 months, 3 weeks ago
C and E negate each other.
upvoted 1 times
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