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Salesforce Certified Platform Developer I – Apex Questions and Answers Already Passed

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Salesforce Certified Platform Developer I – Apex Questions and Answers Already Passed What is the purpose of the `@AuraEnabled` annotation in Apex? The `@AuraEnabled` annotation allows an Apex method to be called from a Lightning component. What is the difference between a trigger and...

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Salesforce Certified Platform Developer I
– Apex Questions and Answers Already
Passed

What is the purpose of the `@AuraEnabled` annotation in Apex?

✔✔The `@AuraEnabled` annotation allows an Apex method to be called from a Lightning

component.

What is the difference between a trigger and a process builder in Salesforce?

✔✔A trigger is a piece of Apex code that executes before or after data manipulation language

(DML) operations, while a process builder is a declarative tool that automates business processes

without coding.

How can you prevent hitting governor limits in Apex?

✔✔To prevent hitting governor limits, use bulk processing techniques, avoid SOQL queries

inside loops, and utilize collections.

What is the maximum number of SOQL queries allowed in a single transaction?

✔✔The maximum number of SOQL queries allowed in a single transaction is 100.

1

,How can you handle exceptions in Apex?

✔✔You can handle exceptions in Apex using try-catch blocks to catch and manage errors

gracefully.

What is a custom metadata type in Salesforce?

✔✔A custom metadata type is a special kind of custom object that allows for the creation of

application configuration and can be packaged and deployed.

What is the purpose of the `@isTest` annotation in Apex?

✔✔The `@isTest` annotation is used to designate a class or method as a test method that is not

counted against the organization's Apex code limits.

How do you define a method as static in Apex?

✔✔You define a method as static by using the `static` keyword, allowing the method to be called

without instantiating the class.

What is the role of the `trigger.new` context variable in Apex triggers?

2

,✔✔The `trigger.new` context variable contains the new records that are being inserted or

updated in a trigger.

What are the advantages of using `@future` methods in Apex?

✔✔`@future` methods allow for asynchronous processing, enabling the execution of long-

running operations in the background without blocking the main thread.

How can you query data from a related object in Apex?

✔✔You can query data from a related object using relationship queries, such as `INNER JOIN`

in SOQL.

What is a wrapper class in Apex?

✔✔A wrapper class is a custom class that contains properties from one or more objects and is

often used to hold data for displaying in Visualforce pages.

What is the difference between a Queueable Apex job and a Batch Apex job?

✔✔A Queueable Apex job is designed for smaller operations that can be executed

asynchronously, while Batch Apex is used for processing large volumes of records in

manageable chunks.

3

, What are governor limits in Salesforce?

✔✔Governor limits are runtime limits enforced by Salesforce to ensure that no single tenant can

monopolize shared resources, ensuring the overall performance of the platform.

How can you create a RESTful web service in Apex?

✔✔You can create a RESTful web service in Apex by defining a class with the

`@RestResource` annotation and methods annotated with `@HttpGet`, `@HttpPost`, etc.

What is the purpose of the `@HttpCallout` annotation in Apex?

✔✔The `@HttpCallout` annotation indicates that the method will make an HTTP callout to an

external service.

Describe differences between Apex and traditional Programming Languages like Java. ✔✔1.)

Traditional Programming Languages are fully flexible, and allow you to tell the system to do just

about anything. Apex is governed, and can only do what the system allows.

2.) Apex is case-insensitive

3.) Apex is on-demand, and is compiled and executed in the Cloud (i.e. on the server)

4.) Apex requires unit testing for deployment into a Production environment

4

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