Salesforce Developer Interview Questions

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1. Difference between queueable and batch apex?  Batchable Apex: If it is a long-running complex process then you should go for Batchable Apex and you can have an option to schedule the batch to run at a customized time. It can process up to 50 million records in asynchronous mode. 5 concurrent jobs are allowed to run at a time and future methods are not allowed in the Batch class. Batch Class should implement Database. Batchable interface and it should have three methods start(), execute() and finish() methods. Queueable Apex: It comes in handy when you need to have both the operations of Batch and future method and it should implement Queueable Interface. If one job is dependent on another job means here we can chain the dependent job in execute method by system.enqueuejob(new secondJob()); You can also able to chain up to 50 jobs and in the developer edition, you can able to chain up to 5 jobs only. It will accept non-primitive types like sObjects and it also runs in asynchronou...
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Lightning Web Components Specialist Superbadge Solution Similar Boats Component

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 SIMILAR BOATS COMONENT


similarBoats.html


<template>

    <lightning-card title={getTitle} icon-name="custom:custom54">

      <lightning-layout multiple-rows="true">

        <template if:true={noBoats}>

          <p class="slds-align_absolute-center">There are no related boats by {similarBy}!</p>

        </template>

        <!-- Loop through the list of similar boats -->

        <template for:each={relatedBoats} for:item="boat">

          <!-- Responsive lightning-layout-item -->

          <lightning-layout-item key={boat.Id} padding="around-small" size="12" small-device-size="6" 

          medium-device-size="4"  large-device-size="4">

            <!-- Each boat tile goes here -->

            <c-boat-tile boat={boat} onboatselect={openBoatDetailPage}></c-boat-tile>

          </lightning-layout-item>

        </template>

      </lightning-layout>

    </lightning-card>

</template>


similarBoats.js


import { LightningElement, api, wire } from 'lwc';

import { NavigationMixin } from 'lightning/navigation'

// import getSimilarBoats

import getSimilarBoats from '@salesforce/apex/BoatDataService.getSimilarBoats';

export default class SimilarBoats extends NavigationMixin(LightningElement) {

    // Private

    currentBoat;

    relatedBoats;

    boatId;

    error;

    

    // public

    @api

    get recordId() {

        // returns the boatId

        return this.boatId;

      }

      set recordId(value) {

          // sets the boatId value

          this.setAttribute('boatId', value);          

          this.boatId = value;

          // sets the boatId attribute

         

      }

    // public

    @api similarBy;

    

    // Wire custom Apex call, using the import named getSimilarBoats

    // Populates the relatedBoats list

    @wire(getSimilarBoats, { boatId: '$boatId', similarBy: '$similarBy' })

    similarBoats({ error, data }) {

        if (data) {

            this.relatedBoats = data;

            this.error = undefined;

            

        } else if(error) {

            this.relatedBoats = undefined;

            this.error = error;

        }

     }

    get getTitle() {

      return 'Similar boats by ' + this.similarBy;

    }

    get noBoats() {

      return !(this.relatedBoats && this.relatedBoats.length > 0);

    }

    

    // Navigate to record page

    openBoatDetailPage(event) { 

        this[NavigationMixin.Navigate]({

            type: 'standard__recordPage',

            attributes: {

                recordId: event.detail.boatId,

                objectApiName: BOAT_OBJECT,

                actionName: 'view'

            },

        });

    }

}


similarBoats.js-meta.xml


<?xml version="1.0" encoding="UTF-8"?>
<LightningComponentBundle xmlns="http://soap.sforce.com/2006/04/metadata">
    <apiVersion>48.0</apiVersion>
    <isExposed>true</isExposed>
    <masterLabel>similarBoats</masterLabel>    
    <description>Similar Boats</description>
    <targets>
        <target>lightning__RecordPage</target>
    </targets>
    <targetConfigs>
        <targetConfig targets="lightning__RecordPage">
            <property label="Enter the property you want to compare by" name="similarBy" type="String" datasource="Type,Price,Length"  />
            <objects>
                <object>Boat__c</object>
            </objects>
        </targetConfig> 
    </targetConfigs>
</LightningComponentBundle>

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