Oracle - Optimizing PL/SQL Performance MCQ

Oracle – Optimizing PL/SQL Performance

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1. What tools can assist in optimizing PL/SQL performance?

Oracle Forms

Oracle Text

SQL*Loader

Profilers and trace utilities

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2. How can you identify memory usage issues in PL/SQL code?

By tracing PL/SQL execution

By using the DBMS_PROPERTY package

By checking the DBA_TABLES view

By analyzing memory dumps

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3. What is a common technique for identifying bottlenecks in PL/SQL code?

Analyzing memory usage

Using package-based caching

Calculating elapsed time

Profiling and tracing code execution

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4. When optimizing PL/SQL code, what does choosing the fastest program refer to?

Selecting the program with the best performance

Selecting the program with the highest memory usage

Selecting the program with the most lines of code

Selecting the shortest program

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5. What is one way to avoid infinite loops in PL/SQL code?

Implement proper error handling

Increase the loop counter limit

Use dynamic SQL

Disable the loop optimizer

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6. In PL/SQL, what do performance-related warnings help identify?

Compile-time errors

Infinite loops

Bottlenecks in code

Memory leaks

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7. What is the primary purpose of the optimizing compiler in PL/SQL?

To shorten code execution time

To format code

To analyze memory usage

To generate warnings for optimization

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8. How does the optimizer work to improve PL/SQL performance?

By recompiling all code at runtime

By generating optimized code at runtime

By analyzing code dependencies

By profiling code execution

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9. What is a common technique for runtime optimization of fetch loops in PL/SQL?

Implementing data caching

Profiling code execution

Analyzing memory dumps

Using bulk processing

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10. How can data caching techniques improve PL/SQL performance?

By reducing memory usage

By speeding up SQL statement execution

By eliminating the need for loops

By shortening code execution time

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11. What is the primary benefit of package-based caching in PL/SQL?

Faster SQL statement execution

Improved code readability

Reduced memory usage

Elimination of bottlenecks

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12. What is the primary purpose of deterministic function caching in PL/SQL?

To shorten code execution time

To cache SQL statements

To improve code readability

To cache function results

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13. What is the Function Result Cache introduced in Oracle Database 11g used for?

Profiling code execution

Caching function results

Storing SQL statements

Generating warnings

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14. What is a key advantage of using BULK COLLECT for high-speed querying in PL/SQL?

Faster SQL statement execution

Reduced memory usage

Improved code readability

Elimination of loops

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15. What does FORALL enable in PL/SQL for high-speed DML operations?

Loop optimization

High-speed DML operations

Dynamic SQL execution

Profiling code execution

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16. How can pipelined table functions improve PL/SQL performance?

By speeding up SQL statement execution

By eliminating loops

By reducing memory usage

By improving code readability

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17. When is it advisable to replace row-based inserts with pipelined function-based loads in PL/SQL?

When using dynamic SQL

When working with triggers

When handling large datasets

When optimizing function performance

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18. What is the primary goal of tuning merge operations with pipelined functions in PL/SQL?

To improve code readability

To enhance performance

To shorten code execution time

To eliminate bottlenecks

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19. What is asynchronous data unloading with parallel pipelined functions used for in PL/SQL?

Reducing memory usage

Eliminating infinite loops

Profiling code execution

Efficient data unloading

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20. What performance implications are associated with partitioning and streaming clauses in parallel pipelined functions in PL/SQL?

Complex data loads

Enhanced code readability

Reduced memory usage

Improved runtime performance

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21. How do pipelined functions interact with the cost-based optimizer in Oracle?

They provide hints to the optimizer.

They replace the optimizer.

They always disable the optimizer.

They have no impact on the optimizer.

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22. When should you consider using the NOCOPY parameter mode hint in PL/SQL?

When using explicit cursors

When dealing with large datasets

When handling exceptions

When optimizing function performance

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23. What is one way to optimize function performance in SQL in Oracle?

By using the wrong datatype

By increasing the complexity of the code

By using dynamic SQL

By using the right datatype

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24. What is the primary focus when stepping back for the big picture on performance in PL/SQL?

Profiling code execution

Optimizing the overall system

Analyzing memory usage

Identifying bottlenecks

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25. How can you optimize function performance in SQL in Oracle?

By adding excessive comments

By using random datatypes

By selecting the correct datatype

By avoiding PL/SQL altogether

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Oracle – Optimizing PL/SQL Performance MCQ