Describe the Considerations When Developing in a Multi-Tenant Environment. PLATFORM-DEVELOPER-I Practice Questions (Page 4)

Questions 16–20

1. 16foundation · easy

   Why should developers avoid hard-coding limits (such as a fixed number of records to process) in Apex code?

   • ABecause hard-coded values are difficult to read.
   • BBecause the same code may need to handle different data volumes in different orgs.
   • CBecause hard-coded values are not allowed by the Apex compiler.
   • DBecause hard-coded limits increase the number of governor limits used.
   Reveal Solution Discussion Select an answer first
2. 17application · medium

   A developer is optimizing a Visualforce page that displays a list of accounts and their related contacts. The page currently uses a SOQL query inside a loop to retrieve contacts for each account, causing performance issues. Which approach should the developer use to improve performance?

   • AUse a custom controller with a @RemoteAction method to query contacts asynchronously.
   • BIncrease the page's batch size to reduce the number of loop iterations.
   • CUse a single SOQL query with a subquery to retrieve contacts for all accounts at once.
   • DUse a map to store accounts and then query contacts for each account individually.
   Reveal Solution Discussion Select an answer first
4. 18expert · medium

   A developer is writing Apex code that will be used in a batch job. The job needs to process a large data set and update records. The developer is concerned about hitting the DML row limit. Which approach is the most effective?

   • AUse a single DML statement to update all records in one transaction.
   • BUse a @future method to update the records asynchronously.
   • CUse a for loop to update each record individually.
   • DUse a batch Apex class with a batch size of 200 and perform DML operations in the execute method.
   Reveal Solution Discussion Select an answer first
5. 19application · medium

   A developer is writing Apex code to process a list of leads. The code needs to update each lead with a new field value. The developer is concerned about hitting the DML row limit. Which approach is the most efficient?

   • AUse a for loop to update each lead individually.
   • BUse a single update statement on the entire list of leads.
   • CUse a Database.update method with the allOrNothing parameter set to false.
   • DUse a batch Apex class to process the leads in chunks.
   Reveal Solution Discussion Select an answer first
6. 20foundation · easy

   Which of the following is a performance consideration when developing in a multi-tenant environment?

   • AUsing synchronous callouts to external services whenever possible.
   • BStoring large amounts of data in custom settings for faster access.
   • CUsing formula fields to perform complex calculations on large datasets.
   • DAvoiding SOQL queries inside loops to reduce the number of queries executed.
   Reveal Solution Discussion Select an answer first