Describe the Implications of Compound Data Types in Apex Programming. PLATFORM-DEVELOPER-II Practice Questions (Page 3)

Questions 11–15

1. 11foundation · easy

   Which pattern is recommended for efficient lookup of records by a field value?

   • AUsing a Map with the field value as the key
   • BUsing a nested List to store records
   • CUsing a Set and checking membership
   • DUsing a List and iterating to find a match
   Reveal Solution Discussion Select an answer first
2. 12foundation · easy

   What is the result of adding the value 'A' twice to a Set in Apex?

   • AAn exception is thrown
   • BThe set contains one 'A' element
   • CThe set is cleared
   • DThe set contains two 'A' elements
   Reveal Solution Discussion Select an answer first
4. 13foundation · easy

   Which casting technique is used to convert a generic sObject to a specific type like Account?

   • AExplicit casting using (Account)
   • BUsing the as keyword
   • CImplicit casting
   • DUsing the convert() method
   Reveal Solution Discussion Select an answer first
5. 14application · medium

   A developer needs to store a list of products for each category in an Apex class. The number of categories is dynamic, and each category can have multiple products. Which data structure is most appropriate?

   • ASet<String> categories and List<Product2> allProducts
   • BList<List<Product2>> productGroups
   • CMap<String, List<Product2>> categoryToProducts
   • DList<Map<String, Product2>> categoryProductList
   Reveal Solution Discussion Select an answer first
6. 15foundation · easy

   What is a common use case for a Map<String, List<Account>> in Apex?

   • ATo store a list of strings with account names
   • BTo group Accounts by a string key, such as industry
   • CTo store a set of unique Accounts
   • DTo store a single Account per key
   Reveal Solution Discussion Select an answer first