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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Testing, Debugging, and Deployment | 15% | - Debugging and performance profiling - Apex unit testing best practices - Test data strategies and mocking - Deployment tools (SFDX, Metadata API) |
| Topic 2: User Interface | 18% | - Visualforce advanced controllers - Lightning Web Components (LWC) advanced features - Lightning Data Service - Aura Components |
| Topic 3: Data Modeling | 12% | - External objects and data sources - Large data volumes considerations - Advanced object relationships and data modeling |
| Topic 4: Logic and Process Automation | 22% | - Asynchronous Apex (Batch, Queueable, Future, Scheduled) - Advanced Apex programming - Invocable Actions and Platform Events - Dynamic Apex and SOQL/SOSL |
| Topic 5: Integration | 15% | - Platform Events and Change Data Capture - REST and SOAP web services (Apex callouts) - Named Credentials and authentication - External Services and Connect REST API |
| Topic 6: Architecture | 18% | - Apex Enterprise Patterns - Design patterns and Apex trigger frameworks - Namespace and package management - Governor limits and bulkification |
>> Exam Questions Plat-Dev-301 Vce <<
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NEW QUESTION # 113
Which two queries are selective SOQL queries and can be used for a large data set of 200,000 Account records?
Choose 2 answers
Answer: A,D
Explanation:
Selective queries in SOQL are optimized for performance. Query B is selective because it filters out empty names, which are likely to be less in number. Query C is selective if the list of names is small, and 'Customer_Number_c' is indexed or can be used as an external ID field. Working with Very Large SOQL Queries
NEW QUESTION # 114
A developer needs to add code to a Lightning web component's configuration file so the component only renders for a desktop size form factor when on a record page.
What should the developer add to the component's record page target configuration to meet this requirement?
A)
B)
C)
D)
Answer: A
Explanation:
When you want a Lightning web component to only render for a specific form factor, you can use the <targets> tag within the component's .xml configuration file. To specify that the component should only appear on a desktop, you use the <targetConfig> tag with the targets="lightning__RecordPage" attribute and nest a <supportedFormFactors> tag inside it. Within this tag, you include a <supportedFormFactor> tag with the attribute type="Large".
Option B is the correct markup to ensure that the component only appears for the desktop form factor on a record page.
Lightning Web Components Developer Guide - Configure Components for Lightning Experience and the Salesforce Mobile App
NEW QUESTION # 115
Consider the Apex controller below, that is called from an Aura component.
What is wrong with this code?
Answer: B
Explanation:
The method defined in the Apex class must be static to be used as an Aura-enabled method. Aura-enabled methods need to be static because they are called by the Lightning framework without instantiating the class.
NEW QUESTION # 116
A developer is building a complex commission calculation engine in Apex that is called from an Opportunity trigger. During QA it was reported that the calculations are incorrect.
The developer has representative test data and passing test methods in their developer sandbox.
Which three tools or techniques could the developer use to execute the code and pause it at key lines to visually inspect values of various Apex variables?
Choose 3 answers
Answer: B,D,E
Explanation:
To debug and troubleshoot the commission calculation engine, a developer can use several tools provided by Salesforce to inspect and pause the execution of Apex code.
Apex Interactive Debugger: It allows real-time debugging of Apex code execution. With this tool, a developer can set breakpoints, step through code, inspect variables, and evaluate expressions.
Developer Console: Although the Developer Console does not allow interactive debugging, it does provide the ability to view logs that capture the execution of code. Debug logs can be inspected to understand the flow of execution and values of variables at different points in time.
Apex Replay Debugger: This tool is part of Salesforce Extensions for Visual Studio Code. It allows a developer to replay a debug log as if they are stepping through the code line by line, which can be very useful to inspect the state of variables at specific points in the execution.
Apex Interactive Debugger
Developer Console Debugging
Apex Replay Debugger
NEW QUESTION # 117
A company has an Apex process that makes multiple extensive database operations and web service callouts. The database processes and web services can take a long time to run and must be run sequentially.
How should the developer write this Apex code without running into governor limits and system limitations?
Answer: B
Explanation:
Queueable Apex is suitable for complex processes that require chaining jobs to run sequentially. It can handle long-running processes without hitting governor limits, as each chained job runs in a new transaction with its own set of governor limits.
NEW QUESTION # 118
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