Impaqtive Interview Questions and Answers

Child records can be made read-only when parent record's field is updated using validation rules.

• Create a validation rule on child object

• Use ISCHANGED() function to check if parent field is updated

• Use PRIORVALUE() function to get the previous value of parent field

• Use ISBLANK() function to check if the previous value of parent field is blank

• Use ISNEW() function to allow creation of child records

• Use OR() function to comb...read more

To call a controller method from JavaScript in a Visualforce page, use the actionFunction tag.

• Create a controller method in the Apex class.

• Add an actionFunction tag in the Visualforce page.

• Call the actionFunction from JavaScript using its name.

• Pass parameters to the controller method using the actionFunction tag.

• Use the rerender attribute to update the page after the controller method is called.

Collection variables are used to store multiple values of the same data type in Apex.

• Collection variables include Lists, Sets, and Maps.

• Lists are ordered collections of elements that can contain duplicates.

• Sets are unordered collections of unique elements.

• Maps are collections of key-value pairs.

• Collection variables are useful for iterating over multiple values and performing operations on them.

• Example: List names = new...read more

Use data loader's parent-child functionality to load both parent and child records at once.

• Create a CSV file with both parent and child records

• Use the data loader's parent-child functionality to map the relationship between the two

• Ensure that the parent records are loaded before the child records

• Use the data loader's insert or upsert operation to load the data

Batch class and future method syntax in Salesforce development.

• Batch class syntax: Implements Database.Batchable interface, has start(), execute() and finish() methods.

• Future method syntax: Has @future annotation, returns void, takes parameters.

• Example batch class syntax: public class MyBatch implements Database.Batchable { ... }

• Example future method syntax: @future public static void myFutureMethod(String param) { ...

Classic is the old Salesforce UI while Lightning is the new modern UI.

• Classic has a cluttered interface while Lightning has a cleaner and more intuitive interface.

• Lightning has more features and customization options than Classic.

• Lightning is optimized for mobile devices while Classic is not.

• Lightning has a more modern look and feel compared to Classic.

• Classic is being phased out by Salesforce in favor of Lightning.

• Exa...read more

I am currently working as a Salesforce developer on a project to implement custom solutions for a client.

• Developing custom Salesforce solutions based on client requirements

• Creating Apex classes, triggers, and Visualforce pages

• Integrating third-party applications with Salesforce using APIs

Batchable interface has three methods: start(), execute(), and finish().

• start() method is used to initialize the batch job and return the query locator.

• execute() method is used to process the records returned by the query locator.

• finish() method is used to perform any final operations after the batch job completes.

Access modifiers in Apex control the visibility and accessibility of classes, methods, variables, and interfaces.

• There are three access modifiers in Apex: private, public, and global.

• Private access modifier restricts access to only within the defining class.

• Public access modifier allows access from any other class or trigger.

• Global access modifier allows access from any Apex code in any Salesforce organization.

• Access m...read more

There are multiple ways to write asynchronous code in Salesforce.

• Using @future annotation

• Using Queueable interface

• Using Batch Apex

• Using Platform Events

• Using Asynchronous Apex REST Callouts

Order of Execution in Salesforce determines the sequence of events that occur when a record is saved.

• Validation rules are executed first

• Before triggers are executed next

• Custom validation rules are executed after before triggers

• After triggers are executed next

• Assignment rules are executed after after triggers

• Workflows are executed after assignment rules

• Escalation rules are executed after workflows

• Finally, the record is

Annotations are used in Salesforce to add metadata to classes, methods, and variables.

• Annotations are used to provide additional information to the compiler or runtime engine.

• They can be used to control the behavior of code, such as enforcing security or limiting access.

• Examples of annotations include @AuraEnabled, @TestSetup, and @Deprecated.

• Annotations can also be used to provide documentation for code, such as @desc...read more

Coding best practices ensure efficient, maintainable, and scalable code.

• Use meaningful variable and function names

• Follow a consistent coding style

• Write modular and reusable code

• Use version control

• Write unit tests

• Optimize code for performance

• Document code and add comments