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Salesforce Exams > Platform Developer 2 Exam > Flashcards

Platform Developer 2 Exam Flashcards

1
Q

What annotation is needed on an Apex class to make it available to be called from a flow/process builder?

A

@InvocableMethod

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2
Q

What element do you use in Flow Builder to invoke Apex code?

A

Apex Action

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3
Q

What tag is used to embed a flow in a Visualforce page?

A

<flow:interview> component
</flow:interview>

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4
Q

How can you call a flow from Apex?

A

By using the Start method of the Interview class

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5
Q

What are the Invocable Method requirements?

A

Method requirements:
- must be static
- public or global
- annotated with @InvocableMethod

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6
Q

How many method parameters can an Invocable Method have?

A

<= 1

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7
Q

How many methods can be annotated with the @InvocableMethod annotation in an Apex class?

A

Only one

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8
Q

Can you use multiple annotations on an @InvocableMethod method?

A

Nope

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9
Q

What data structure & type must the parameter be for an Invocable Method?

A

List (List of List works as well). Can be a specific or generic sObject type

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10
Q

What data structure & type must the return type be for an Invocable Method?

A

List (List of List works as well). Can be a specific or generic sObject type

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11
Q

Where can you call an @InvocableMethod from?

A

Process builder, Flow, REST API

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12
Q

What is an @InvocableVariable?

A

Annotation in a class with an @InvocableMethod that allows the variables to be accessible in the @InvocableMethod

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13
Q

Who is the running user for the @InvocableMethod?

A

The running user that triggered the process

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14
Q

What are the 3 advanced options in Apex action flow elements?

A
  1. (recommended) Flow decides at run time
  2. Apex action always runs in a different transaction
  3. Apex action always runs in the same transaction
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15
Q

Where can you embed a flow?

A

LWC, Aura, VF page

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16
Q

Can you embed a LWC in a flow?

A

Yes

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17
Q

How do you embed a LWC in a flow?

A

In the config file, add a target & targetConfig tag (ex. below)

<targets>
<target>lightning\_\_FlowScreen</target>
</targets>

<targetConfigs>
<targetConfig>
<property></property>
</targetConfig>
</targetConfigs>

___________________________________________________________
In the js file, use the @api decorator to expose the property in the screen flow (ex. below)

@api strName;

18
Q

For a LWC that is embedded in a flow, how can you customize the property editor?

A

In the config file, add the configurationEditor tag with the name of the other component to the targetConfig tag (ex. below)

<targetConfigs>
<targetConfig>
<property></property>
</targetConfig>
</targetConfigs>

19
Q

Javascript question: What does a variable with a prefix of “_” indicate? Ex.
_myVar
anotherVar

A

The prefix with an underscore is a convention that indicates the variable is private. JS doesn’t actually enforce it, but it helps to indicate author intent

20
Q

What is the Process.Plugin interface?

A

Precursor to @InvocableAction. @InvocableAction is preferenced now

21
Q

What are some declarative tools?

A
  • formula fields, roll-up summary fields, validation rules, approval processes, workflowr ules, Process Builder, Flow Builder, ReportBuilder, etc
22
Q

What are some benefits of declarative tools?

A
  • Easier to build and edit
  • Get automatic upgrades
  • Some aren’t subject to governor limits (ex. roll-up summary fields)
23
Q

When is code needed?

A
  • Custom UI (Lightning components (Aura or LWC))
  • Apex needed for web services, email services, complex validation over multiple objects
  • REST or SOAP integrations
  • Regularly processing a large number of records
24
Q

Can you share records using flow?

A

Yes

25
Q

Can a flow be triggered by a platform event?

A

Yes

26
Q

How can you process an email to a case?

A
  • Simple scenario: Email-to-Case configuration
  • Complex scenario: Apex Email Handler”
27
Q

What is Apex Email Service?

A

Apex class that can receive and process incoming emails to a specific generated email address. Can define parameters around which email senders are allowed

28
Q

Can you rollback records in a flow?

A

Yes

29
Q

How can you set the order of flows that are running on a single obj?

A

In Flow Trigger Explorer there’s an “Edit Order” button where you can set it appropriately

30
Q

What’s the max number of scheduled Apex jobs that you can have at one time?

A

100

31
Q

When should you use a SOQL for loop?

A

When there may be a large number of query results (it processes it in batches)

32
Q

How can you handle trigger recursion?

A

Use a static boolean to determine if the trigger has run already

33
Q

When are the Limit methods helpful?

A

Can be used to check if you’re going to exceed governor limits

34
Q

How many @future methods can be invoked per method?

A

50

35
Q

What is an unhandled exception?

A
  • Code that can’t handle an error that occurs during a transaction
  • Code terminates & all changes are rolled back
  • Salesforce sends an email notification
  • UI notification is shown to user
  • Noted in the debug log
36
Q

What are some options for error handling?

A
  • addError() to an sObject record
  • try/catch/finally statements
  • Error class methods that can be used: getMessage(), getFields(), and getStatusCode methods
37
Q

What are some types of exceptions?

A
  • DmlException
  • ListException
  • NullPointerException
  • QueryException (trying to set SOQL results to a single sObj instead of a list)
  • SObjectException (trying to access a field that wasn’t retrieved in a SOQL query)
  • LimitException (these can’t be caught)
  • CustomException
  • MixedDML
38
Q

What is the safe navigation operator?

A

a=b?.c means
- if b is not null, set a = b.c
- if b is null, set a = null

39
Q

What is the MixedDmlException

A

When a single transaction performs DML operations for both a setup object such as a User record and a non-setup object such as an Account record, a Mixed DML error is thrown.

40
Q

What is the syntax for a CustomException?

A

if(somethingHappens) throw new CustomException(’Failure!’);

41
Q

What keyword is used to specify a starting row offset into the result rest returned by a query?

A

OFFSET

Salesforce Exams (2 decks)

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