PD1 Apex Programming 4

Question 1

What is the correct order of trigger events for an update operation?

Accepted Answer

before update, after update

Answer

An update DML operation fires the before update event first (for validation/modification), then after update (for downstream logic).

Question 2

Which method on the Limits class returns the number of SOQL queries issued so far in the current transaction?

Accepted Answer

Limits.getQueries()

Answer

Limits.getQueries() returns the number of SOQL queries consumed so far in the current Apex transaction.

Question 3

What is the behavior of `Database.insert(records, false)` compared to `insert records`?

Accepted Answer

It allows partial success, inserting valid records and collecting errors for failed ones

Answer

Passing false as the second argument enables partial processing: successful records are committed and failures are captured in SaveResult objects.

Question 4

Which Apex class is used to invoke a named credential-based callout?

Accepted Answer

HttpRequest

Answer

HttpRequest is configured with the endpoint (including the callout:namedCredential syntax) and sent via the Http class.

Question 5

What does the `transient` keyword do in an Apex class used with a Visualforce page?

Accepted Answer

Excludes a variable from the view state

Answer

The `transient` keyword prevents a variable from being stored in the Visualforce view state, reducing its size.

(PD1) Salesforce Certified Platform Developer 1 Practice Test