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Home Oracle 1z0-084

Oracle 1z0-084 Exam Practice Questions (P. 1)

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Question #1
The CURSOR_SHARING and OPTIMIZER_CAPTURE_SQL_PLAN_BASELINES parameters are set to default. The top five wait events in an AWR report are due to a large number of hard parses because of several almost identical SQL statements.
Which two actions could reduce the number of hard parses? (Choose two.)
  1. A
    Create the KEEP cache and cache tables accessed by the SQL statements.
  2. B
    Create the RECYCLE cache and cache tables accessed by the SQL statements.
  3. C
    Increase the size of the library cache.
  4. D
    Set OPTIMIZER_CAPTURE_SQL_PLAN_BASELINES to TRUE.
  5. E
    Set the CURSOR_SHARING parameter to FORCE.

Correct Answer: CE ?️

Question #2
Which three types of statistics are captured by Statspack with snap level 6? (Choose three.)
  1. A
    Parent and child latches
  2. B
    Parent and child latches
  3. C
    Optimizer execution plans
  4. D
    Plan usage data
  5. E
    Enqueue statistics
  6. F
    Segment-level statistics

Correct Answer: CDE ?️

Question #3
Examine this AWR report excerpt:

You must reduce the impact of database I/O, without increasing buffer cache size and without modifying the SQL statements.
Which compression option satisfies this requirement?
  1. A
    COLUMN STORE COMPRESS FOR QUERY LOW
  2. B
    ROW STORE COMPRESS
  3. C
    ROW STORE COMPRESS ADVANCED
  4. D
    COLUMN STORE COMPRESS FOR QUERY HIGH

Correct Answer: C ?️

Question #4
Examine this output of a query of V$PGA_TARGET_ADVICE:

Which statements is true?
  1. A
    With a target of 700 MB or more, all multipass executions work areas would be eliminated.
  2. B
    PGA_AGGREGATE_TARGET should be set to at least 800 MB
  3. C
    PGA_AGGREGATE_TARGET should be set to at least 700 MB.
  4. D
    With a target of 800 MB or more, all one-pass execution work areas would be eliminated.

Correct Answer: B ?️

Question #5
Examine this statement and its corresponding execution plan:

Which phase introduces the CONCATENATION step?
  1. A
    SQL Semantic Check
  2. B
    SQL Execution
  3. C
    SQL Row Source Generation
  4. D
    SQL Transformation
  5. E
    SQL Adaptive Execution

Correct Answer: D ?️

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