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- 1z0-417: Oracle Database Performance and Tuning Essentials 2015
Free 1z0-417: Oracle Database Performance and Tuning Essentials 2015 Exam Questions and Answers
Last updated: March 31, 2025
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293-1z0-417: Oracle Database Performance and Tuning Essentials 2015
#Question
If a database executes a high percentage of full table scans, what should be a key area of focus for improvement?
A.
Connection limits
B.
Index effectiveness
C.
User permissions
D.
Disk I/O throughput
Correct Answer:
B
Focusing on index effectiveness can help reduce unnecessary full table scans, leading to improved query performance.
#Question
A DBA finds that the system is frequently experiencing high load averages. What could be a possible remediation strategy?
A.
Decrease database configurations
B.
Limit application access
C.
Review resource allocation
D.
Increase the number of Oracle instances
Correct Answer:
C
Reviewing resource allocation allows the DBA to identify any imbalances or inefficiencies that might be contributing to high load averages.
#Question
Which performance-related effect occurs when a database has too much fragmentation?
A.
Increased I/O waits
B.
Improved query speed
C.
Reduced cache hits
D.
Higher logical read counts
Correct Answer:
A
Increased fragmentation leads to inefficient data access patterns, causing more I/O waits and negatively impacting performance.
#Question
Users complain about frequently receiving stale data. What can a DBA examine to resolve this issue?
A.
Table encryption practices
B.
Connection pooling settings
C.
Read consistency settings
D.
Version control for user roles
Correct Answer:
C
Examining read consistency settings can help ensure users access the most current data, resolving stale data issues.
#Question
In general, what is the impact of high concurrency on database performance?
A.
It can cause bottlenecks
B.
It enhances security
C.
It improves performance
D.
It indicates a well-designed application
Correct Answer:
A
High concurrency can create bottlenecks, negatively affecting performance as multiple sessions compete for limited resources.
#Question
If SQL performance drastically drops after an upgrade, what is a critical first step?
A.
Review resource allocation
B.
Compare the optimizer settings
C.
Increase user privileges
D.
Check session limits
Correct Answer:
B
Checking optimizer settings post-upgrade is crucial because changes in optimization algorithms can affect query performance.
#Question
A DBA notices an increase in logical reads. What does this indicate regarding performance?
A.
Lower disk usage
B.
Increased database growth
C.
Potential memory issues
D.
Improved I/O efficiency
Correct Answer:
C
An increase in logical reads could indicate potential memory issues, as more data is being accessed in memory rather than cached.
293-1z0-417: Oracle Database Performance and Tuning Essentials 2015
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