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最新的 Application Development 1Z1-771 免費考試真題 (Q29-Q34):

問題 #29
Which is a valid method of logging messages to the execution log in APEX applications?

A. apex_error.add_error ('SAL for ' || :ENAME || ' increased by 19.');
B. apex_automation.log_info ('SAL for ' || :ENAME || ' increased by 19.');
C. apex_debug.info ('SAL for :ENAME ||' increased by 19.');

答案：B

解題說明：
Logging in APEX tracks runtime activity:
A . apex_automation.log_info: Correctly logs an informational message to the execution log for automation tasks (e.g., workflows). The syntax || :ENAME || concatenates the item value (e.g., "JOHN") into "SAL for JOHN increased by 19." It's stored in APEX_AUTOMATION_LOG, viewable in Monitoring.
B . apex_debug.info: Logs to debug output, but the syntax is flawed (:ENAME || isn't concatenated properly; should be 'SAL for ' || :ENAME || ...). It's valid only when debugging is enabled (e.g., APEX_DEBUG.ENABLE).
C . apex_error.add_error: Adds an error to the error stack for user display, not a log message.
Technical Insight: log_info is non-intrusive, unlike apex_debug, which requires debug mode, or apex_error, which signals failure.
Use Case: Logging salary updates in a scheduled job without debug overhead.
Pitfall: Ensure :ENAME is in scope (e.g., page item).

問題 #30
Which two actions are performed by using the Object Browser?

A. Browse database objects of the current schema.
B. Create a lookup table based on a column in the current table.
C. Restore dropped database objects.
D. Create and run SQL scripts.

答案：A,B

解題說明：
Object Browser in SQL Workshop is a GUI for managing schema objects:
B . Browse database objects of the current schema: Displays tables, views, procedures, etc., in a tree view, allowing inspection of definitions (e.g., columns, constraints) and data previews.
D . Create a lookup table based on a column in the current table: From a table's column (e.g., DEPTNO), you can generate a lookup table (e.g., DEPT_LOOKUP) with unique values, automating reference table creation.
A . Restore dropped objects: Not supported; this requires DBA tools (e.g., FLASHBACK TABLE).
C . Create and run SQL scripts: This is a SQL Scripts feature, not Object Browser.
Practical tip: Use "Create Lookup Table" to normalize data efficiently.

問題 #31
Which two Query Source types can be used to create a dynamic LOV?

A. Select List
B. Function Returning SQL Query
C. SQL Query
D. Procedure

答案：B,C

解題說明：
A dynamic List of Values (LOV) in APEX populates options based on a query source. The supported types include:
Function Returning SQL Query: A PL/SQL function that returns a SQL query string (e.g., RETURN 'SELECT ename, empno FROM emp';). This offers flexibility for dynamic conditions or complex logic.
SQL Query: A direct SQL statement (e.g., SELECT ename, empno FROM emp) executed at runtime to fetch LOV values. It's the simplest and most common approach.
Procedure: Procedures execute logic but don't return query results in the format required for an LOV (they don't produce a result set directly).
Select List: This is a UI component, not a query source type for defining an LOV.
Dynamic LOVs enhance user interaction by providing real-time, data-driven options, critical for forms and filters.

問題 #32
The Movies faceted search report is filtered only when the Apply button for a selected facet is clicked. What must be done in the Page Designer so that report filtering is automatically executed when any facet value is selected?

A. Navigate to each facet and then in the Property Editor, turn on Client-Side Filtering.
B. Navigate to the faceted search region Attributes, and turn off the Show Facet Name attribute.
C. Navigate to the faceted search region Attributes, and disable the Batch Facet Changes attribute.

答案：C

解題說明：
By default, faceted search can "batch" changes, requiring an "Apply" button click to filter the report. To enable automatic filtering:
Disable the Batch Facet Changes attribute: In Page Designer, under the Faceted Search region's Attributes, setting "Batch Facet Changes" to "No" ensures the report refreshes immediately when a facet value is selected, improving responsiveness. This triggers an AJAX call to update the report without a manual submit.
Show Facet Name: This controls facet label visibility, unrelated to filtering behavior.
Client-Side Filtering: This applies to Interactive Reports/Grids, not faceted search regions, and isn't the correct solution here.
This adjustment enhances the user experience by providing instant feedback.

問題 #33
Which client credentials are used for authentication during the 'Check Syntax' process?

A. Database schema credentials
B. APEX Workspace Admin credentials
C. APEX Developer credentials

答案：A

解題說明：
The "Check Syntax" process in APEX, typically used in SQL Workshop or when validating code, authenticates using Database schema credentials. These are the credentials of the schema associated with the APEX workspace (e.g., username/password of the schema like "HR"). This ensures the process has access to parse and validate SQL or PL/SQL against the database objects in that schema.
APEX Workspace Admin credentials: These are for managing workspaces, not executing database-level syntax checks.
APEX Developer credentials: These authenticate developers into the APEX IDE, not the database runtime environment.
This design aligns with APEX's security model, where database operations are tied to the schema, ensuring accurate validation and error reporting (e.g., missing privileges or invalid objects).

問題 #34
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