Salesforce Trigger Interview Questions

In this Post We Will Completely Discuss about the salesforce trigger interview questions which will be very helpful for the aspirants to recap their preparation in which we have discussed the best interview questions on triggers in salesforce which are the best in 2021 for the purpose of preparation.

Q. What is a Trigger?
Answer : Apex triggers alter you to perform custom actions before or once events to records in Salesforce, like insertions, updates, or deletions. similar to info systems
support triggers, Apex provides trigger support for managing records. Use triggers to perform tasks that can’t be done by exploitation the point-and-click tools within the Salesforce computer programme. for instance, if verificatory a field worth or change a field on a record, use validation rules and work flow rules instead.

Q. What area unit totally different kind of Triggers?
Answer : There area unit 2 sorts of triggers:

Before triggers area unit wont to perform a task before a record is inserted or updated or deleted. These area unit wont to update or validate record values before they’re savedto the info. once triggers area unit used if we would like to use the knowledge set by Salesforce system and to create changes within the different records. area unit wont to access field values that area unit set by the system (such as a record’s Id or LastModifiedDate field), and to have an effect on changes in different records. The records that fireplace the once trigger area unit read-only.

Q. Is there associatey limit on range of triggers outline on an object?
Answer : We can outline as several triggers on associate object as we would like however it’s counseled to possess one trigger per object as a result of the order of execution of various trigger isn’t guaranteed and any trigger will hearth 1st.This is one of the #1 trigger interview questions in salesforce which was repeatedly asked in so many interviews

Q. What does one mean by the bulkifying trigger?
Answer : A trigger ought to be able to handle single record and thousands of record. There area unit 2 necessary purpose for it:

Write triggers that operate collections of sObjects.
Write triggers that perform economical SOQL and DML operations.

If {we will|we’ll|we area unit going to} not follow on top of purpose we have a tendency to might hit governor limit once records are created/updated/deleted in mass exploitation knowledge loader or different tool.

Q. Can a trigger decision a batch class?
Yes, we are able to decision a batch category within the trigger as we have a tendency to kill the traditional apex code.

Q. Can a trigger create a decision to Apex callout method?
Answer : we can decision a callout technique in Apex Trigger however the sole condition is that it’s to be associate asynchronous callout as a result of the trigger flow cannot attend the response received by the callout technique.

Q. Define algorithmic Trigger and the way to avoid it?
Answer : There is a break that the results of the trigger will find yourself occupation a similar trigger once more and may run in an exceedingly loop, this is often referred to as a algorithmic trigger. To avoid this scenario we should always produce a static variable and check the worth of this variable before we have a tendency to execute something within the trigger.

Q. How is Trigger.New totally different from Trigger.newMap?
Answer : Trigger.New variable returns the list of sObject that has invoked the trigger and Trigger.NewMap returns the map of ID’s with the new entered records. NewMap is simply

available in once insert, before and once the update and once undelete.
How is totally different from Trigger.old?

Trigger.New variable returns the list of sObject that has invoked the trigger and Trigger.old returns an inventory of the recenter versions of the records that have invoked the

trigger. Trigger.Old is simply out there in update and delete events.

Q. What is limitations of Workflows overcome by Triggers in Salesforce ?
Answer : The Limitations are Discussed Below

  • Workflows aren’t able to produce or update a separate object.
  • You can’t reference bound fields once exploitation workflows.
  • You may not have your work flow doing quite simply field updates and emails.

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