Apex Programming Flashcards

What is a 'bulkified' Apex trigger?

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

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

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

Answer: Schedulable

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

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

Answer: The new records without Id fields yet assigned

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

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

Answer: DmlException

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

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

Answer: new Http().send(request)

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

What annotation must be added to a test class in Apex?

Answer: @IsTest

@IsTest marks a class as a test class, which excludes it from the org's code size limit.

Which Apex feature allows you to run asynchronous code that chains multiple jobs?

Answer: Queueable Apex

Queueable Apex allows chaining of jobs by calling System.enqueueJob() from within a Queueable class.