SALESFORCE-PD1 Practice Test 35 — 15 Questions

Question 1

Which TWO lifecycle hooks are available in Lightning Web Components? Choose 2 answers.

Accepted Answer

renderedCallback. connectedCallback and renderedCallback are standard LWC lifecycle hooks.

Answer

init

Answer

componentDidMount

Answer

willMount

Question 2

Which THREE statements are true regarding Lightning Web Component shadow DOM encapsulation? Choose 3 answers.

Accepted Answer

querySelector calls inside a component only search within that component's template unless using specific host selectors.. Shadow DOM encapsulates templates, styles, and queries, preventing external CSS bleeding and restricting queries to the component template.

Answer

Global CSS stylesheets automatically penetrate and override LWC shadow DOM styles.

Answer

Child components can be styled directly from parent CSS files without styling hooks.

Question 3

Which TWO ways can a developer trigger a server-side Apex method imperatively from a Lightning Web Component? Choose 2 answers.

Accepted Answer

Import the Apex method as a JavaScript function from '@salesforce/apex/ClassName.methodName'.. Imperative Apex calls return a Promise and are imported directly from the Apex class method.

Answer

Decorate the call with @wire in the JavaScript controller.

Answer

Call the method synchronously on the main thread.

Answer

Use standard form submission tags in HTML.

Question 4

A developer is styling a Lightning Web Component using the Salesforce Lightning Design System (SLDS). To ensure the component adheres to the standard styling guidelines for spacing, what should the developer use?

Accepted Answer

SLDS standard spacing utility classes.. SLDS provides predefined design tokens and CSS utility classes (such asslds-m-around_medium) for consistent spacing.

Answer

Inline styles directly in the HTML template.

Answer

Standard HTML blockquote tags with custom margin properties.

Answer

Hardcoded pixel values in the component's CSS file.

Question 5

Which THREE requirements must be met when implementing a custom Lightning Web Component pagination control? Choose 3 answers.

Accepted Answer

Slice the master dataset array based on current offset and limit calculations.. Custom pagination requires managing current page state, calculating total pages, and updating displayed subsets of data reactively.

Answer

Use standard Visualforce standardSetController inside the LWC JavaScript.

Answer

Directly mutate the server database on every page click.

Question 6

A developer is implementing a Lightning Web Component with a custom CSS file. How does the component load its associated stylesheet?

Accepted Answer

Automatically by sharing the exact base file name in the same component bundle folder.. LWC automatically loads a CSS file with the same name as the component JavaScript and HTML files if placed in the same bundle.

Answer

By declaring the stylesheet in the component's js-meta.xml configuration file.

Answer

By importing the CSS file explicitly at the top of the JavaScript file using an import statement.

Answer

Using a <link rel="stylesheet"> tag inside the component HTML template.

Question 7

A developer needs to create a Lightning Web Component configuration file. What is the required file extension and naming convention?

Accepted Answer

componentName.js-meta.xml. LWC configuration files are named componentName.js-meta.xml.

Answer

componentName.cmp-meta.xml

Answer

componentName.xml

Answer

componentName.config.xml

Question 8

A developer is implementing a Visualforce page that displays a list of accounts and needs to ensure that it adheres to Salesforce security best practices by preventing cross-site scripting (XSS) attacks. Which tag or attribute combination should be used to securely output user-supplied data?

Accepted Answer

<apex:outputText value="{!userSuppliedInput}" escape="true" />. The apex:outputText tag automatically escapes HTML by default, preventing XSS. Alternatively, setting escape=true on bindings ensures safety.

Answer

<apex:includeScript value="{!userSuppliedScript}" />

Answer

<apex:outputField value="{!account.Name}"> with escape="false"

Answer

{!$User.UIThemeDisplayed} without any wrappers

Question 9

A developer is building an Aura component and needs to include a Lightning Web Component inside it. How does the Aura markup reference the LWC?

Accepted Answer

<c:myLwcComponent />. Aura components reference LWC using the syntax c:lwnComponentName where 'c' is the namespace.

Answer

<apex:includeComponent name="myLwcComponent" />

Answer

<lightning:lwc name="myLwcComponent" />

Answer

<aura:component include="myLwcComponent" />

Question 10

A developer needs to execute initialization logic as soon as a Lightning Web Component is inserted into the DOM. Which lifecycle hook should be used?

Accepted Answer

connectedCallback(). connectedCallback() is invoked when a component is inserted into the DOM, making it the standard hook for initialization logic.

Answer

renderedCallback()

Answer

disconnectedCallback()

Answer

constructor()

Question 11

A developer is writing a Lightning Web Component and needs to conditionally render a block of HTML markup based on a boolean property named 'isVisible'. What is the correct syntax in the HTML template?

Accepted Answer

<template if:true={isVisible}>. Conditional rendering in LWC uses the l:if directive or template conditional directives. Wait, the correct directive is lwc:if.

Answer

<apex:outputPanel rendered="{!isVisible}">

Answer

Answer

Question 12

Which CSS methodology forms the foundation of the styling architecture in Salesforce Lightning Design System (SLDS)?

Accepted Answer

BEM (Block Element Modifier). SLDS is built using BEM (Block Element Modifier) methodology for class naming conventions.

Answer

Bootstrap grid standards

Answer

OOCSS exclusively without modifiers

Answer

Tailwind utility prefixes

Question 13

A developer is building a Lightning Web Component that needs to fetch records imperatively based on a user interaction. Which Lightning module should the developer import to access Salesforce data imperatively in JavaScript?

Accepted Answer

@salesforce/apex. To call Apex methods imperatively in a Lightning Web Component, developers must import the method from the @salesforce/apex scoped module.

Answer

lightning/platformResourceLoader

Answer

@salesforce/schema

Answer

lightning/uiRecordApi

Question 14

A developer is troubleshooting a Lightning Web Component where data retrieved via the @wire service needs to be formatted before being rendered in the template. Which THREE approaches are valid ways to handle or transform wired data? Choose 3 answers.

Accepted Answer

Use a getter function that evaluates the wired property and returns the formatted result.. Wired data can be handled via wired adapter property results using a getter, a wired function that transforms the value into a tracked local property, or custom wire adapters.

Answer

Directly mutate the object properties returned by the wire adapter inside the template.

Answer

Use the renderedCallback() hook to modify the raw wired data object directly.

Question 15

A developer is building a Lightning Web Component and wants to iterate over a list of items in the HTML template. Which directive should be used?

Accepted Answer

<template for:each={items} for:item="item">. Iteration in LWC templates uses the <template for:each={list} for:item={item}> construct.

Answer

Answer

<aura:iteration items="{!v.items}" var="item">

Answer

<apex:repeat value="{!items}" var="item">