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最新的 Application Development 1Z0-771 免費考試真題 (Q21-Q26):

問題 #21
You have defined a REST Data Source with ORDS as the REST Data Source Type. The Source is being used as source for an editable Interactive Grid. When a user updates an employee record in this Interactive Grid, which operation is performed on the Database?

A. GET
B. PUT
C. POST

答案：B

解題說明：
An editable Interactive Grid synced with a REST Data Source (ORDS) maps CRUD operations to HTTP methods:
C . PUT: Updates an existing resource. When a user edits a row (e.g., changes SALARY), the grid sends a PUT request to the ORDS endpoint (e.g., /employees/101), updating the corresponding record.
A . POST: Creates new records, used for inserts, not updates.
B . GET: Retrieves data, used for initial grid population, not updates.
Technical note: ORDS maps PUT to an update operation on the underlying table, requiring the REST endpoint to support this method.

問題 #22
Which two layout modes are available for Page Designer under Utilities?

A. Three Pane
B. Four Pane
C. Single Pane
D. Two Pane

答案：A,D

解題說明：
Page Designer's layout modes under Utilities adjust the workspace:
A . Two Pane: Splits into two vertical sections (e.g., tree and properties), ideal for focused editing.
B . Three Pane: Adds a third section (e.g., tree, grid, properties), offering a balanced view for complex pages.
C . Four Pane: Not available; APEX limits to three for usability.
D . Single Pane: Not an option; the minimum is two panes.
Developers toggle these via the Utilities menu to optimize screen real estate based on task complexity.

問題 #23
Which statement is true about the Data Workshop utility?

A. You can load or unload multiple tables at a time.
B. The wizards load and unload table data only.
C. The wizards load and unload all types of schema objects.
D. You cannot load data from an XLSX file with multiple worksheets.

答案：B

解題說明：
The Data Workshop utility in APEX is designed to load and unload table data only, not other schema objects like procedures or views. Option A is false because XLSX files with multiple worksheets are supported (each worksheet can be mapped to a table). Option B is incorrect as it's limited to table data. Option D is partially true but not the most precise answer, as "multiple tables at a time" depends on the process, whereas C is universally accurate.

問題 #24
Which component of the Push Notifications feature stores the messages that are ready to be sent?

A. Subscription
B. Queue
C. Application

答案：B

解題說明：
Push Notifications in Oracle APEX enable real-time messaging to users' devices via Progressive Web App (PWA) capabilities. The component responsible for storing messages is:
A . Queue: The Push Notification Queue (managed internally by APEX and accessible via APIs like APEX_PWA.PUSH_QUEUE) temporarily holds messages scheduled for delivery. When a notification is created (e.g., via APEX_PWA.SEND), it's added to this queue, awaiting processing by the APEX mail system or an external push service. The queue ensures reliable delivery, even if the user is offline temporarily, as messages are dispatched once connectivity is restored.
B . Application: The application defines the PWA settings and logic but doesn't store messages; it's the container, not the storage mechanism.
C . Subscription: Represents user device registrations (stored in APEX_APPL_PUSH_SUBSCRIPTIONS), not the messages themselves. Subscriptions link devices to the app for delivery, not queuing.
Technical Insight: The queue is a database-backed structure, leveraging Oracle's job scheduling (e.g., DBMS_SCHEDULER) to process entries. For example, calling APEX_PWA.SEND(p_message => 'Promo Alert!') adds an entry to the queue, which is then pushed to subscribed devices.
Use Case: A retail app queues a "Sale starts now!" message for 1,000 users, ensuring orderly delivery without overwhelming the server.
Pitfall: If the queue isn't periodically pushed (e.g., via APEX_PWA.PUSH_QUEUE), messages may delay.

問題 #25
Which API can be used to send Push Notifications immediately in Oracle APEX?

A. APEX_PWA.PUSH_QUEUE
B. APEX_PWA.PURGE_QUEUE
C. APEX_PWA.HAS_PUSH_SUBSCRIPTION

答案：A

解題說明：
The APEX_PWA package manages Push Notifications:
B . APEX_PWA.PUSH_QUEUE: This procedure forces immediate processing of the Push Notification queue, sending queued messages (added via APEX_PWA.SEND) to subscribed devices without waiting for the default scheduler (e.g., every 5 minutes). Example: APEX_PWA.PUSH_QUEUE; ensures a "Meeting now!" alert goes out instantly.
A . APEX_PWA.HAS_PUSH_SUBSCRIPTION: Checks if a user has an active subscription (returns BOOLEAN), not for sending.
C . APEX_PWA.PURGE_QUEUE: Clears the queue, discarding unsent messages, not sending them.
Technical Insight: PUSH_QUEUE triggers a job to contact the push service (e.g., Firebase), using VAPID keys from the PWA configuration.
Use Case: Urgent alerts (e.g., system outage) need immediate delivery, bypassing delays.
Pitfall: Overuse can strain the server; use judiciously for time-sensitive messages.

問題 #26
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1Z0-771真題材料，1Z0-771考試

1Z0-771考試，1Z0-771題庫最新資訊

最新的 Application Development 1Z0-771 免費考試真題 (Q21-Q26):

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