Adobe Experience Manager Sites Developer Professional (AD0-E128) Certification Sample Questions

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Adobe AD0-E128 Sample Questions:

01. A company runs self-managed AEM 6.5. Its author tier must keep serving authors when one machine fails, with several author instances active and handling requests at the same time.

Which repository setup meets this requirement?

a) TarMK on each author instance, with replication agents keeping their content synchronized

b) TarMK on a shared network drive mounted by every author instance

c) TarMK with a Cold Standby instance kept in sync for failover

d) MongoMK, so several author instances share one repository stored in MongoDB

02. A developer working with the local AEM SDK wants to set breakpoints in a Sling Model and step through its code while a page renders.

What should the developer do?

a) Open the model on the Sling Models page of the Felix Web Console and set breakpoints on its adapter entries

b) Raise the model's package to DEBUG in a Sling Logging Logger configuration, then follow error.log

c) Start the Quickstart JAR with a JDWP remote-debug option and attach the IDE to it

d) Deploy with the autoInstallBundle profile, which starts the core bundle in debug mode for the IDE

03. A request to /content/mysite/en/products.feed.xml returns output nobody recognizes, and the developer wants to know which servlet or script Sling chooses for it. The developer opens the Sling Servlet Resolver page in the Felix Web Console.

Which three statements describe what this page offers?

(Choose three.)

a) It accepts the request URL, including its selectors and extension

b) It records each request's progress log with timings

c) It lists the servlets and scripts that would handle the request

d) It lets the developer change which servlet handles the request

e) It accepts the HTTP method of the request

04. A self-managed AEM 6.5 deployment has one author instance and three publish instances behind a load balancer.

Which two statements about this topology are accurate?

(Choose two.)

a) The publish instances share one MongoMK repository, so activating to any of them updates all three

b) One author agent delivers to one publish instance, which then synchronizes the other two

c) Taking one publish instance out of the load balancer leaves the other two serving visitors

d) Each publish instance keeps its own repository, so activated content must be delivered to each one

05. After a deployment to a local AEM SDK instance, the project's core bundle stays in the Installed state instead of Active, and none of its Sling Models work. The developer wants to find why the bundle cannot start.

Where should the developer look?

a) The Sling Models page of the Web Console, for the bundle's registered models

b) The bundle's detail view on the Felix Web Console Bundles page, for unresolved Import-Package entries

c) The Felix Web Console Components page, for components of the bundle that report an unsatisfied reference

d) request.log, for the requests that reach the bundle's servlets

06. On a local AEM instance, a product page request that was just made returned markup from the wrong script. The developer wants to review that actual request's progress log, with each resolution step and its timing, to see which script or servlet handled it.

Which Felix Web Console page shows this?

a) Sling Log Support

b) Sling Servlet Resolver

c) Recent Requests

d) Sling Resource Resolver

07. On a self-managed AEM 6.5 environment, a new page renders on author but returns 404 on publish, even when the publish instance is requested directly instead of through the Dispatcher. Other pages activated in the same hour reached publish without problems.

What should the developer check first?

a) The error.log on author for HTL exceptions

b) Whether this page was actually activated, and whether the anonymous user can read it on publish

c) The replication agent's queue, for a paused or blocked state

d) The Dispatcher /filter rules for the page's path

08. On a self-managed AEM 6.5 instance, a slow component query is suspected of traversing the repository. Before creating or changing any Oak index, the developer wants to see which index, if any, the query engine would choose for that query.

Which tool shows this?

a) The Explain Query tool, which displays the query plan

b) request.log, with each request's timing

c) CRXDE Lite, browsing the index definitions under /oak:index

d) The Index Manager, which lists every index with its type and status

09. On AEM as a Cloud Service, pages published on the author service do not appear on the publish service. The developer wants to confirm whether the distribution queue to publish is blocked.

Where should the developer look?

a) The Developer Console's Bundles view, filtered to the Sling Content Distribution bundles

b) The Distribution page of the author service, which shows the publish agent's queue

c) The publish service's request.log, downloaded from Cloud Manager and searched for queue entries

d) The Cloud Manager execution details of the environment's most recent pipeline run

10. On an author instance, a component's layout looks broken in the page editor. The developer must tell whether the problem comes from the editor's authoring markup and styles or from the component's own rendering.

How should the developer request the page?

a) Through CRXDE Lite, by opening the page's jcr:content node
b) With the .model.json selector, to compare exporter output
c) With ?wcmmode=disabled added to the URL
d) With ?debugClientLibs=true added to the URL, so each client library loads as separate files

Answers:

Question: 01 Answer: d	Question: 02 Answer: c	Question: 03 Answer: a, c, e	Question: 04 Answer: c, d	Question: 05 Answer: b
Question: 06 Answer: c	Question: 07 Answer: b	Question: 08 Answer: a	Question: 09 Answer: b	Question: 10 Answer: c

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