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Salesforce Plat-Dev-301 Exam Syllabus Topics:

SectionObjectives
Integration and APIs- Platform events and messaging
  • 1. Event-driven architecture
    • 2. Change Data Capture concepts
      - External system integration
      • 1. Callouts from Apex
        • 2. REST and SOAP API usage
          Data Modeling and Management- Advanced data modeling
          • 1. Large data volume considerations
            • 2. Complex relationships and schema design
              - Data access and security
              • 1. Sharing rules and Apex-managed sharing
                • 2. Security enforcement in Apex
                  Application Development- Advanced Apex programming
                  • 1. Exception handling and debugging strategies
                    • 2. Dynamic Apex and metadata-driven development
                      • 3. Apex design patterns and best practices
                        - Asynchronous processing
                        • 1. Scheduled Apex
                          • 2. Batch Apex and Queueable Apex
                            • 3. Future methods and limits considerations
                              Testing and Deployment- Testing strategies
                              • 1. Code coverage and quality practices
                                • 2. Test data creation and mocking
                                  - Deployment lifecycle
                                  • 1. Version control and CI/CD concepts
                                    • 2. Change sets and deployment tools

                                      >> Plat-Dev-301トレーニング <<

                                      Plat-Dev-301関連受験参考書 & Plat-Dev-301日本語試験対策

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                                      Salesforce Certified Platform Developer II - Multiple Choice 認定 Plat-Dev-301 試験問題 (Q133-Q138):

                                      質問 # 133
                                      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?

                                      正解：C

                                      解説：
                                      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


                                      質問 # 134
                                      A developer wrote an Apex class to make several callouts to an external system.
                                      If the URLs used in these callouts will change often, which feature should the developer use to minimize changes needed to the Apex class?

                                      正解：B

                                      解説：
                                      The correct feature to use is C, Named Credentials. Named Credentials are a secure way of storing the endpoint and authentication details for callouts to external services. When URLs change frequently, using Named Credentials allows you to manage the endpoint URL in one place without changing the Apex code.
                                      Named Credentials


                                      質問 # 135
                                      A software company uses a custom object, Defact__c, to track defects in their software. Defect__c has organization-wide defaults set to private. Each Defect_ c has a related list of Reviewer < records, each with a lookup field to User that is used to indicate that the User will review the defect__c.
                                      What should be used to give the User on the Reviewer_c record read only access to the Defect__c record on the Reviewer_c record?

                                      正解：D

                                      解説：
                                      Apex managed sharing is used to programmatically share records when organization-wide defaults are private. It allows for creating share records that give read-only access to users specified in a related list.


                                      質問 # 136
                                      A page throws an 'Attempt to dereference a null object' error for a Contact.
                                      What change in the controller will fix the error?

                                      正解：C

                                      解説：
                                      The error 'Attempt to dereference a null object' often occurs when trying to access a member of a null object. By checking if the object is null in the getter method and returning a new instance if it is, the error can be prevented.
                                      Apex Developer Guide


                                      質問 # 137
                                      A developer notices the execution of all the test methods in a class takes a long time to run, due to the initial setup of all the test data that is needed to perform the tests. What should the developer do to speed up test execution?

                                      正解：C

                                      解説：
                                      Using the @testSetup annotation to define a method that creates test data before the tests run can significantly speed up test execution by reducing the setup time for each test method in the class. This method runs once before any test method in the class and can be used by all test methods.


                                      質問 # 138
                                      ......

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