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Salesforce DEX-450 certification exams are a great way to analyze and evaluate the skills of a candidate effectively. Big companies are always on the lookout for capable candidates. You need to pass the DEX-450 Certification Exam to become a certified professional. This task is considerably tough for unprepared candidates however with the right DEX-450 prep material there remains no chance of failure.

Salesforce DEX-450 exam is designed for professionals who are looking to enhance their knowledge and skills in programmatic development using Apex and Visualforce in a Lightning Experience. Programmatic Development using Apex and Visualforce in Lightning Experience certification exam measures the candidate's ability to design, develop, test, and deploy custom applications using these technologies. Passing DEX-450 Exam demonstrates the candidate's proficiency in the Salesforce platform's programmatic development environment and sets them apart as an expert in this field.

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Salesforce DEX-450 certification exam consists of 60 multiple-choice questions that must be completed within 105 minutes. DEX-450 exam is administered by Salesforce and can be taken online or at a testing center. Candidates must achieve a passing score of 65% or higher to earn the certification.

To prepare for the Salesforce DEX-450 certification exam, candidates should have a solid understanding of the Apex programming language, Visualforce framework, and Lightning Components. Candidates should also be familiar with the Salesforce development process, including designing, developing, testing, and deploying custom applications. Studying the Salesforce documentation, attending training courses, and practicing hands-on development are all effective ways to prepare for DEX-450 Exam. Passing DEX-450 exam can enhance a developer's career prospects and demonstrate their expertise in programmatic development on the Salesforce platform.

Salesforce Programmatic Development using Apex and Visualforce in Lightning Experience Sample Questions (Q116-Q121):

NEW QUESTION # 116
What are two ways a developer can get the status of an enqueued job for a class that implements the queueable interface?
Choose 2 answers

• A. View the Apex Jobs page
• B. Query the AsyncApexJob object
• C. View the Apex Status page
• D. View the Apex Flex Queue

Answer: A,B

Explanation:
To get the status of an enqueued job for a class that implements the Queueable interface, a developer can:
Option C: View the Apex Jobs page
Correct Answer.
The Apex Jobs page in Salesforce Setup lists all asynchronous Apex jobs, including queueable jobs.
Developers can view the status, start time, and completion time of the job.
The AsyncApexJob object contains information about the status of asynchronous Apex jobs.
Developers can write a SOQL query to retrieve details about the queueable job using the job ID returned when the job was enqueued.
Example:
AsyncApexJob job = [SELECT Id, Status, NumberOfErrors FROM AsyncApexJob WHERE Id = :jobId]; The Apex Flex Queue is used for holding batch jobs that are waiting to be processed.
Queueable jobs are not placed in the Apex Flex Queue.
Option B: View the Apex Status page
Incorrect.
There is no specific "Apex Status" page.
This may refer to the Apex Jobs page.
Conclusion:
The two ways to get the status of an enqueued queueable job are C (Apex Jobs page) and D (Query the AsyncApexJob object).
Reference:
Monitor Asynchronous Apex
Option D: Query the AsyncApexJob object
Correct Answer.
AsyncApexJob Object
Incorrect Options:
Option A: View the Apex Flex Queue
Incorrect.

 

NEW QUESTION # 117
Universal Containers has an order system that uses an Order Number to identify an order for customers and service agents. Order records will be imported into Salesforce.
How should the Order Number field be defined in Salesforce?

• A. Lookup
• B. Direct Lookup
• C. External ID and Unique
• D. Indirect Lookup

Answer: C

Explanation:
Defining the Order Number field as an External ID and marking it as Unique ensures:
External ID:
Allows the field to be used for matching during data import.
Helps in upsert operations.
Unique:
Ensures no duplicate Order Numbers exist.
Maintains data integrity.
Why Not Other Options:
Option A: Direct Lookup is not a valid field type for this scenario.
Option B: Lookup fields create relationships, not suitable here.
Option D: Indirect Lookup is used with external objects.
Reference:
External IDs:
"An external ID is a custom field that has the External ID attribute, meaning that it contains unique record identifiers from a system outside of Salesforce."
- Salesforce Help: External ID Fields

 

NEW QUESTION # 118
A team of many developers work in their own individual orgs that have the same configuration as the production org.
Which type of org is best suited for this scenario?

• A. Developer Edition
• B. Developer Sandbox
• C. Partner Developer Edition
• D. Full Sandbox

Answer: B

Explanation:
Option C: Developer Sandbox
Correct Answer.
Developer Sandboxes are intended for coding and testing by a single developer.
They copy all application and configuration information from production, ensuring the same metadata.
Each developer can work in their own isolated environment.
Full Sandboxes include all data and are often limited in number.
They are better suited for performance testing and staging.
Option B: Developer Edition
Incorrect.
Developer Edition orgs do not mirror production configurations.
They are standalone orgs with limited features.
Option A: Partner Developer Edition
Incorrect.
Intended for ISV partners to develop and package applications.
Conclusion:
The best-suited org type is Developer Sandbox, which is Option C.
Reference:
Sandbox Types and Templates
Option D: Full Sandbox
Not Ideal for Individual Developers.

 

NEW QUESTION # 119
How many Accounts will be inserted by the following block of code?

• A. 0
• B. 1
• C. 2
• D. 3

Answer: B

Explanation:
Additional Notes:
Governor Limits Enforcement:
Salesforce enforces governor limits to ensure efficient use of resources in a multi-tenant environment.
Exceeding limits results in a runtime exception (System.LimitException) that cannot be caught.
Exception Handling:
In this scenario, a System.LimitException is thrown, which cannot be handled by try-catch blocks.
Explanation:
Understanding the Code:
for (Integer i = 0 ; i < 500; i++) {
Account a = new Account (Name='New Account ' + i);
insert a;
}
What the Code Does:
Loops from i = 0 to i = 499 (total of 500 iterations).
In each iteration:
Creates a new Account record with the name 'New Account ' + i.
Performs an insert DML operation for each account.
Salesforce Governor Limits:
DML Statements Limit:
Maximum of 150 DML statements per Apex transaction.
Conclusion: Incorrect.
Option B: 0
Conclusion: Incorrect, as 150 accounts are inserted before hitting the limit.
Option C: 500
Conclusion: Incorrect, because the governor limit prevents more than 150 DML statements.
Option D: 150
Conclusion: Correct.
Optimizing the Code:
Bulk DML Operations:
Best Practice: Perform DML operations on lists rather than individual records to reduce the number of DML statements.
Optimized Code:
List<Account> accountList = new List<Account>();
for (Integer i = 0 ; i < 500; i++) {
Account a = new Account (Name='New Account ' + i);
accountList.add(a);
}
insert accountList;
Benefits:
Only one DML statement is used (insert accountList).
All 500 accounts are inserted successfully.
Reference:
Analyzing the Code Against Limits:
Number of DML Statements Used:
The code performs one DML statement per iteration.
Total DML statements attempted: 500.
Governor Limit Exceeded:
After 150 DML statements, the code exceeds the limit.
At the 151st insert, a LimitException is thrown.
Number of Accounts Successfully Inserted:
Only the first 150 accounts are inserted before the exception halts execution.
Option Analysis:
Option A: 100
Final Answer:
Best Practices Summary:
Use Collections for DML Operations: Process records in bulk using lists or maps.
Avoid Loops with DML Statements: Do not place DML operations inside loops.

 

NEW QUESTION # 120
When the code executes, a DML exception is thrown.
How should a developer modify the code to ensure exceptions are handled gracefully?

• A. Implement the upsert DML statement.
• B. Implement a try/catch block for the DML.
• C. Implement Change Data Capture.
• D. Remove null items from the list of Accounts.

Answer: B

 

NEW QUESTION # 121
......

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