CSA Apex Programming 3

Question 1

What is a 'bulkified' Apex trigger?

Accepted Answer

A trigger designed to handle up to 200 records efficiently using collections

Answer

A bulkified trigger handles up to 200 records in one execution by operating on collections rather than individual records.

Question 2

Which Apex class is used to schedule code to run at a specific time?

Accepted Answer

Schedulable

Answer

Implementing the Schedulable interface allows an Apex class to be scheduled via System.schedule().

Question 3

What does Trigger.new contain in a before insert trigger?

Accepted Answer

The new records without Id fields yet assigned

Answer

In a before insert trigger, Trigger.new contains the new records but Id fields have not yet been assigned by the database.

Question 4

Which exception type is thrown when a DML operation violates a validation rule or required field?

Accepted Answer

DmlException

Answer

A DmlException is thrown when a DML operation fails due to validation rules, required fields, or other data integrity issues.

Question 5

In Apex, which method sends an HTTP request and waits for the response?

Accepted Answer

new Http().send(request)

Answer

You create an Http object and call send(HttpRequest) on it to make a callout and receive an HttpResponse.

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