Plat-Dev-301考題免費下載 & Plat-Dev-301指南Fast2test不僅可靠性強，而且服務也很好。如果你選擇了Fast2test但是Plat-Dev-301考試沒有成功，我們會100%全額退款給您。Fast2test還會為你提供一年的免費更新服務。 最新的 Salesforce Developer Plat-Dev-301 免費考試真題 (Q161-Q166):問題 #161
A developer wrote the following method to find all the test accounts in the org:
What should be used to fix this failing test?
A. Test. fixsdSsarchReaulta [) method to set up expected data
B. @testsetup method to set up expected data
C. Teat.loadData to set up expected data
D. @isTest (SeeAllData=true) to access org data for the test
問題 #162
What is the optimal way to fix this?
A)
B)
C)
D)
A. Option D
B. Option B
C. Option C
D. Option A
答案：C
解題說明：
Test.startTest() and Test.stopTest() should wrap the method call for resource allocation. Test.setMock() sets a mock callout for the test to handle callouts.
問題 #163
A developer sees test failures in the sandbox but not in production. No code or metadata changes have been actively made to either environment since the sandbox was created.
Which consideration should be checked to resolve the issue?
A. Ensure the Apex classes are on the same API version.
B. Ensure the sandbox Is on the same release as production.
C. Ensure that Disable Parallel Apex Testing Is unchecked.
D. Ensure test classes are using SeeAllData = true.
答案：B
解題說明：
If test failures are occurring in a sandbox but not in production and there have been no active code or metadata changes, it could be due to differences in the Salesforce release versions between the two environments. Sandboxes can be on preview instances which get upgraded to new releases before production instances. This can lead to differences in behavior and could affect test executions. Ensuring that both the sandbox and production are on the same release can resolve such issues. API version differences and parallel testing settings typically do not cause discrepancies if the code hasn't changed, and while using SeeAllData=true is generally not recommended due to its dependence on the organization's data, it's unlikely to be the cause if the issue is related to the environment rather than the data.
Sandbox Preview Instructions
Understand the Salesforce Release Process
問題 #164
Which three actions must be completed in a Lightning web component for a JavaScript file In a static resource to be loaded? Choose 3 answers
A. Import the static resource.
B. Call loadScript.
C. Append the static resource to the DOM.
D. Import a method from the platformResourceLoader.
E. Reference the static resource in a <script> tag.
答案：A,B,D
問題 #165
A developer implemented a custom data table in a Lightning web component with filter functionality. However, users are submitting support tickets about long load times when the filters are changed. The component uses an Apex method that is called to query for records based on the selected filters.
What should the developer do to improve performance of the component?
A. Use SOSL to query the records on filter change.
B. Use setstoraclel() in the Apex method to store the response In the client-side cache.
C. Return all records into a list when the component is created and filter the array In JavaScript.
D. Use a selective SOQL query with a custom Index.
答案：D
解題說明：
When faced with performance issues in a Lightning Web Component (LWC) due to SOQL query load times, the optimal approach is often to improve the query's selectivity. This can be achieved by using a selective SOQL query with a custom index. Salesforce can create custom indexes to improve the performance of queries that cannot be optimized through standard indexing. When a query is selective, it can efficiently retrieve records from the database using the index, thus reducing the query execution time and speeding up the component's performance when filters are changed. The other options (returning all records, using SOSL, or client-side caching) do not directly address the root cause of the performance issue, which is the need for a more efficient database operation.
Make SOQL Query Selective
Use of Indexes in SOQL Queries
