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//when the callout endpoint's url and authentication settings are done in the remote settings HttpRequest req = new HttpRequest();...

create unit tests run unit tests run only code marked as tests check the test result check code coverage that should be minimum 75...

Six Tips to Great Unit Tests https://developer.salesforce.com/blogs/developer-relations/2016/07/six-tips-great-unit-tests.html Tests run...

Use the following: SOQL injection - a SOQL injection attack can be used by attackers to access otherwise restricted data in your...

Add the attribute lightningStylesheets="true" in the <apex:page> Put all visualforce elements in the html body - <body...

<apex:page controller="retrieveCase" tabStyle="Case"> <apex:pageBlock> {!contactName}'s Cases <apex:pageBlockTable value="{!cases}"...

datatable <!-- For this example to render fully, associate the page with a valid account record in the URL. For example:...

Eg of dynmic query: String query = 'select id from account where name = \'' + name + '\''; List<Account> queryResult =...

use case: assign them equally to the existing members. For eg, if there are 3 members, assign the first lead to member1, second lead to...

Use case: suppose that you are building a recruiting application and have an object called Job. You want to validate that the recruiter...

use case - everytime a page is requested the datetime variable is updated. Solution: declare the datetime variable as transient. public...

use case: If the opportunity has been changed to 'Closed Won' then check the checkbox. Solution: Trigger.new returns a list, which are...

Eg: trigger trgOp on Opportunity (before delete, before insert, before update, after delete, after insert, after update){ OpTrgHandler...

It is primarily useful when the method is called by another method and the exception handling is transferred to the caller method. Eg:...

use case: When a contact is inserted or updated, its field State__c should be updated with the state where its postal code matches with...

An Apex property is similar to a variable. Use case # 1: Properties can be used to validate data before a change is made. Eg: <apex:page...

Use Case: When an email is received from a client, a task should be created against the contact record with the email matching the 'from...

Authorize your Trailhead Playground or Developer org and provide it with an alias (mydevorg in the command below): sfdx...

It gives the ability to: Access sObject and field describe information Describe information provides metadata information about sObject...