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Exam 1z0-083 topic 1 question 94 discussion

Actual exam question from Oracle's 1z0-083
Question #: 94
Topic #: 1
[All 1z0-083 Questions]

Which two are true about poorly performing SQL statements and their tuning in Oracle database instances? (Choose two.)

  • A. SQL statements performing many physical I/Os can always have their performance improved by creating indexes.
  • B. SQL statements doing only logical reads never require tuning because they do no physical I/O.
  • C. The solution that best optimizes one SQL statement can degrade the performance of others.
  • D. SQL statements doing joins always do more physical I/O than single table queries.
  • E. Poorly performing SQL statements can be tuned automatically by the Oracle server.
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Suggested Answer: CE 🗳️
by gon20 at May 5, 2021, 3:58 p.m.

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ObserverPL
Highly Voted 3 years, 1 month ago
Of course C and E
upvoted 10 times
...
RinD
Highly Voted 3 years, 2 months ago
I think CE
upvoted 5 times
...
antonica
Most Recent 3 months, 3 weeks ago
CE, The other one answer are not true.
upvoted 1 times
...
_gio_
1 year ago
Selected Answer: CE
Sure of CE
upvoted 1 times
...
ScottL
1 year, 2 months ago
Selected Answer: CE
C,E Correct
upvoted 1 times
...
G_C
1 year, 9 months ago
Selected Answer: CE
CE but not so obvious.
upvoted 2 times
...
gon20
3 years, 2 months ago
Go with C, E
upvoted 5 times
...
Community vote distribution
A (35%)
C (25%)
B (20%)
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