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- 1z0-084: Oracle Database 19c: Performance Management and Tuning
Free 1z0-084: Oracle Database 19c: Performance Management and Tuning Exam Questions and Answers
Last updated: January 14, 2025
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230-1z0-084: Oracle Database 19c: Performance Management and Tuning
#Question
What is a common side effect of large JOIN operations in SQL queries?
A.Higher resource consumption
B.Faster response times
C.Increased performance
D.Enhanced caching
Correct Answer:
A
Large JOIN operations can lead to higher resource consumption, which can negatively affect overall database performance.
#Question
In Oracle 19c, what is the purpose of SQL Plan Management?
A.Query result caching
B.Manage and preserve SQL execution plans
C.Increase user activity
D.Improve network speed
Correct Answer:
B
SQL Plan Management helps manage and preserve execution plans, ensuring consistent performance for SQL statements over time.
#Question
What type of indexes can lead to faster query results in Oracle?
A.Bitmap Indexes
B.Non-unique Indexes
C.All of the above
D.Columnar Indexes
Correct Answer:
C
All mentioned types of indexes (Non-unique, Columnar, and Bitmap) can enhance query performance; the choice depends on specific use cases.
#Question
Which metric is critical for assessing disk performance in an Oracle Database environment?
A.CPU Utilization
B.SQL Response Time
C.User Activity
D.Disk Latency
Correct Answer:
D
Disk latency is a critical metric that indicates how quickly requests can be returned from disk, impacting overall performance.
#Question
What database feature helps adjust SQL execution plans dynamically based on runtime conditions?
A.Adaptive SQL
B.Standard Indexing
C.Limited Parsing
D.SQL Profiles
Correct Answer:
A
Adaptive SQL allows Oracle to adjust execution plans based on data statistics available during runtime, optimizing query efficiency.
#Question
How does partitioning tables impact query performance?
A.It complicates trending
B.It indicates user focus
C.It enables optimized access paths
D.It always decreases performance
Correct Answer:
C
Partitioning allows queries to access only relevant data, thus improving performance by minimizing the data scanned.
#Question
Which Oracle Database feature can help optimize memory usage for frequently executed queries?
A.Resource Manager
B.Partitioning
C.Result Caching
D.Database Links
Correct Answer:
C
Result Caching allows Oracle Database to retain the results of frequently executed queries to enhance performance.
230-1z0-084: Oracle Database 19c: Performance Management and Tuning
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