Question 1: Which Apex collection type automatically prevents duplicate values?

• List
• Set (Correct answer)
• Map
• Array

Correct answer: Set

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

Question 2: What does the 'with sharing' keyword enforce in an Apex class?

• Field-level security only
• Object-level security only
• The current user's record-level sharing rules (Correct answer)
• System administrator permissions

Correct 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.

Question 3: How many DML statements can be executed in a single Apex transaction?

• 50
• 100
• 150
• 200 (Correct answer)

Correct answer: 200

Salesforce allows up to 150 DML statements per Apex transaction.

Question 4: Which Apex method is used to convert a List to a Set to remove duplicates?

• List.dedupe()
• new Set<Id>(myList) (Correct answer)
• myList.toSet()
• Set.fromList(myList)

Correct answer: new Set<Id>(myList)

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

Question 5: What is the correct syntax to query all Accounts in Apex?

• SELECT * FROM Account
• [SELECT Id, Name FROM Account] (Correct answer)
• Database.query('Account')
• SOQL.query(Account.class)

Correct answer: [SELECT Id, Name FROM Account]

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

Question 6: Which governor limit controls the total number of records returned by SOQL queries in one transaction?

• 5,000 records
• 10,000 records
• 25,000 records
• 50,000 records

A single Apex transaction can retrieve a maximum of 50,000 records via SOQL.

Question 7: In Apex, what keyword marks a method that can be called from a Visualforce page or Lightning component?

• global
• @AuraEnabled (Correct answer)
• public static
• @RemoteAction

Correct answer: @AuraEnabled

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