Apex Programming Flashcards

Which Apex collection type automatically prevents duplicate values?

Answer: Set

A Set is an unordered collection that does not allow duplicate values.

What does the 'with sharing' keyword enforce in an Apex class?

Answer: The current user's record-level sharing rules

'with sharing' enforces the running user's sharing rules so they cannot access records they don't have permission to see.

How many DML statements can be executed in a single Apex transaction?

Answer: 200

Salesforce allows up to 150 DML statements per Apex transaction.

Which Apex method is used to convert a List to a Set to remove duplicates?

Answer: new Set(myList)

You can pass a List directly into a Set constructor (e.g., new Set(myList)) to eliminate duplicates.

What is the correct syntax to query all Accounts in Apex?

Answer: [SELECT Id, Name FROM Account]

Inline SOQL in Apex uses square brackets and requires explicit field names — wildcards are not supported.

In Apex, what keyword marks a method that can be called from a Visualforce page or Lightning component?

Answer: @AuraEnabled

@AuraEnabled exposes an Apex method so it can be invoked from Lightning components.