P.S. Free 2025 Salesforce DEX-450 dumps are available on Google Drive shared by BraindumpQuiz: https://drive.google.com/open?id=1-fGwKYG2rA5WXwMfd3kuxNrOlMAPM_t-
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The DEX-450 Exam covers various topics such as Apex programming concepts, Visualforce markup language, Lightning components, debugging and testing, and deployment. DEX-450 exam consists of 60 multiple-choice questions, and candidates are given 105 minutes to complete it. It is important to note that the DEX-450 exam is one of the prerequisites for the Salesforce Certified Platform Developer II certification. Programmatic Development using Apex and Visualforce in Lightning Experience certification is highly valued in the industry, as it is a testament to the candidate's ability to design and develop complex applications on the Salesforce platform.
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The second format of Programmatic Development using Apex and Visualforce in Lightning Experience (DEX-450) is the web-based practice exam that can be taken online through browsers like Firefox, Chrome, Safari, MS Edge, Internet Explorer, and Microsoft Edge. You don't need to install any excessive plugins or Software to attempt the web-based Practice DEX-450 Exam. All operating systems also support the web-based practice exam.
NEW QUESTION # 156
What is the return data type when ApexPages.currentPage().getParameters() is used to retrieve URL parameters from a visualforce controller?
Answer: B
NEW QUESTION # 157
If apex code executes inside the execute() method of an Apex class when implementing the Batchable interface, which statement are true regarding governor limits? Choose 2 answers
Answer: A,B
NEW QUESTION # 158
A developer considers the following snippet of code: Boolean isOK; integer x; String theString = 'Hello'; if (isOK == false && theString == 'Hello') { x = 1; } else if (isOK == true && theString =='Hello') { x = 2; } else if (isOK != null && theString == 'Hello') { x = 3; } else { x = 4; } Based on this code, what is the value of x?
Answer: B
NEW QUESTION # 159
A developer wants to improve runtime performance of Apex calls by caching results on the client.
What is the most efficient way to implement this and follow best practices?
Answer: D
Explanation:
To improve runtime performance by caching Apex call results on the client, the developer should decorate the server-side method with @AuraEnabled(cacheable=true).
@AuraEnabled(cacheable=true) Annotation:
When applied to an Apex method, it enables the method's results to be cached on the client, improving performance for subsequent calls.
This is especially effective in Lightning Web Components (LWC) and can also be used in Aura components.
"To cache method results, annotate the method with @AuraEnabled(cacheable=true). Methods annotated with cacheable=true are called cached methods."
- Lightning Web Components Developer Guide: Call Apex Methods
Why Not Other Options:
A . Call the setStorable() method on the action in the JavaScript client-side code: This approach is used in Aura components but is less efficient and not considered best practice compared to using cacheable=true.
"For improved performance, use @AuraEnabled(cacheable=true) instead of action.setStorable()."
- Aura Components Developer Guide: Calling Server-Side Actions
B . Set a cookie in the browser for use upon return to the page: Managing cookies for caching Apex results is not efficient and can lead to security and scalability issues.
C . Decorate the server-side method with @AuraEnabled(storable=true): There is no storable=true parameter for @AuraEnabled. The correct parameter is cacheable=true.
Best Practices:
Use @AuraEnabled(cacheable=true): This is the recommended way to cache Apex method results in Lightning components.
"Apex methods annotated with @AuraEnabled(cacheable=true) are cached on the client and shared across components."
- Lightning Web Components Developer Guide: Apex Methods Cache
Conclusion: By decorating the Apex method with @AuraEnabled(cacheable=true), the developer enables client-side caching of the method's results, improving runtime performance in an efficient and recommended way.
NEW QUESTION # 160
What are two considerations for deciding to use a roll-up summary field? Choose 2 answer's partner.
Answer: A,B
NEW QUESTION # 161
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P.S. Free 2025 Salesforce DEX-450 dumps are available on Google Drive shared by BraindumpQuiz: https://drive.google.com/open?id=1-fGwKYG2rA5WXwMfd3kuxNrOlMAPM_t-
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