[Oct-2023] Dumps Practice Exam Questions Study Guide for the TVB-450 Exam
TVB-450 Dumps with Practice Exam Questions Answers
Salesforce TVB-450 (Trailhead Virtual Bootcamp for Platform Developer I) Certification Exam is a valuable certification for developers who want to demonstrate their proficiency in developing custom applications on the Salesforce platform. TVB-450 exam tests the candidate's knowledge of various topics such as Apex, Visualforce, Data Modeling, and Security. Trailhead Virtual Bootcamp for Platform Developer I certification is an industry-recognized credential that can help developers advance their careers in the Salesforce ecosystem.
NEW QUESTION # 18
Which aspect of Apex programming is limited due to multitenancy?
- A. The number of records returned from database queries
- B. The number of methods in an Apex Class
- C. The number of active Apex classes
- D. The number of records processed in a loop
Answer: A
NEW QUESTION # 19
A developer has to identify a method in en Apex class that performs resource intensive actions in memory by iterating over the result set of a SOQL statement on the account. The method also performs a SOQL statement to save the changes to the database.
Which two techniques should the developer implement as a best practice to ensure transaction control and avoid exceeding governor limits?
Choose 2 answers
- A. Use the System.Limit class to monitor the current CPU governor limit consumption.
- B. Use Partial DHL statements to ensure only valid data is committed.
- C. Use the Database.Savepoint method to enforce database integrity.
- D. Use the @ReadOnly annotation to bypass the number of rows returned by a SOQL.
Answer: A,C
NEW QUESTION # 20
What will be the output in the debug log in the event of a QueryExeption during a call to the @query method in the following Example?
- A. Querying Accounts. Query Exception. Done
- B. Querying Accounts. Query Exception.
- C. Querying Accounts. Custom Exception.
- D. Querying Accounts. Custom Exception Done.
Answer: A
NEW QUESTION # 21
What should a developer do to check the code coverage of a class after running all tests?
- A. View the Code Coverage column in the list on the Apex Classes page.
- B. View the Class test Percentage tab on the Apex Class list view in Salesforce Setup.
- C. Select and run the class on the Apex est Execution page in the Developer Console.
- D. View the code coverage percentage or the class using the Overalll code Coverage panel in the Developer Console Test tab.
Answer: B
NEW QUESTION # 22
A developer wrote Apex code that calls out to an external system. How should a developer write the test to provide test coverage?
- A. Write a class that extends HTTPCalloutMock.
- B. Write a class that extends WebserviceMock
- C. Write a class that implements the HTTPCalloutMock interface.
- D. Write a class that implements the WebserviceMock interface.
Answer: C
NEW QUESTION # 23
Given the following Anonymous Block:
Which one do you like?
What should a developer consider for an environment that has over 10,000 Case records?
- A. The try/catch block will handle exceptions thrown by governor limits.
- B. The transaction will succeed and changes will be committed.
- C. The transaction will fail due to exceeding the governor limit.
- D. The try/catch block will handle any DML exceptions thrown.
Answer: B
NEW QUESTION # 24
developer created this Apex trigger that calls MyClass .myStaticMethod:
trigger myTrigger on Contact(before insert) ( MyClass.myStaticMethod(trigger.new, trigger.oldMap); } The developer creates a test class with a test method that calls MyClass.mystaticMethod, resulting in 81% overall code coverage. What happens when the developer tries to deploy the trigger and two classes to production, assuming no other code exist?
- A. The deployment fails because the Apex trigger has no code coverage.
- B. The deployment passes because both classes and the trigger were included in the deployment.
- C. The deployment fails because no assertions were made in the test method.
- D. The deployment passes because the Apex code has required (>75%) code coverage.
Answer: A
NEW QUESTION # 25
A developer must create a CreditcardPayment class that provides an implementation of an existing Payment class. Public virtual class Payment { public virtual void makePayment(Decimal amount) { /*implementation*/ } } Which is the correct implementation?
- A. Public class CreditcardPayment extends Payment {
public override void makePayment(Decimal amount) { /*implementation*/ }
} - B. Public class CreditCardPayment extends Payment {
public virtual void makePayment(Decimal amount) { /*implementation*/ }
} - C. Public class CreditCardPayment implements Payment {
public virtual void makePayment(Decimal amount) { /*implementation*/ }
} - D. Public class CreditCardPayment implements Payment {
public override void makePayment(Decimal amount) { /*Implementation*/ }
}
Answer: A
NEW QUESTION # 26
In terms of the MVC paradigm, what are two advantages of implementing the layer of a Salesforce application using Aura Component-based development over Visualforce? Choose 2 answers
- A. Server-side run-time debugging
- B. Automatic code generation
- C. Rich component ecosystem
- D. Self-contained and reusable units of an application
Answer: C,D
NEW QUESTION # 27
A developer wrote the following two classes:
The StatusFetcher class successfully compiled and saved. However, the Calculator class has a compile time error.
How should the developer fix this code?
- A. Change the class declaration for the Calculator class to public with inherited sharing.
- B. Make the isActive method in the StatusFetcher class public.
- C. Change the class declaration for the statusFetcher class to public with inherited sharing.
- D. Make the doCalculations method in the Calculation class private.
Answer: B
NEW QUESTION # 28
A developer must implement a CheckPaymentProcessor class that provides check processing payment capabilities that adhere to what defined for payments in the PaymentProcessor interface. public interface PaymentProcessor { void pay(Decimal amount); } Which is the correct implementation to use the PaymentProcessor interface class?
- A. Public class CheckPaymentProcessor implements PaymentProcessor {
public void pay(Decimal amount) {}
} - B. Public class CheckPaymentProcessor implements PaymentProcessor {
public void pay(Decimal amount);
} - C. Public class CheckPaymentProcessor extends PaymentProcessor {
public void pay(Decimal amount);
} - D. Public class CheckPaymentProcessor extends PaymentProcessor {
public void pay(Decimal amount) {}
}
Answer: B
NEW QUESTION # 29
A developer needs to prevent the creation of Request_c records when certain conditions exist in the system. A RequestLogic class exists to checks the conditions. What is the correct implementation?
- A. Trigger RequestTrigger on Request (after insert) {
RequestLogic.validateRecords {trigger.new};
} - B. Trigger RequestTrigger on Request (before insert) {
RequestLogic.validateRecords {trigger.new};
} - C. Trigger RequestTrigger on Request (before insert) {
if (RequestLogic.isvalid{Request})
Request.addError {'Your request cannot be created at this time.'};
} - D. Trigger RequestTrigger on Request (after insert) {
if (RequestLogic.isValid{Request})
Request.addError {'Your request cannot be created at this time.'};
}
Answer: B
NEW QUESTION # 30
What are three considerations when using the @InvocableMethod annotation in Apex?
Choose 3 answers
- A. A method using the @InvocableMethod annotation can be declared as Public or Global.
- B. A method using the @InvocableMethod annotation can have multiple input parameters.
- C. Only one method using the @InvocableMethod annotqation can be defined per Apex class.
- D. A method using the @InvocableMethod annotation must define a return value.
- E. A method using the @InvocableMethod annotation must be declared as static
Answer: A,C,E
NEW QUESTION # 31
Universal Containers implemented a private sharing model for the Account object. A custom Account search tool was developed with Apex to help sales representatives find accounts that match multiple criteria they specify. Since its release, users of the tool report they can see Accounts they do not own. What should the developer use to enforce sharing permission for the currently logged-in user while using the custom search tool?
- A. Use the without sharing keyword on the class declaration.
- B. Use the with sharing keyword on the class declaration.
- C. Use the schema describe calls to determine if the logged-in users has access to the Account object.
- D. Use the UserInfo Apex class to filter all SOQL queries to returned records owned by the logged-in user.
Answer: B
Explanation:
Use the with sharing keyword on the class declaration. The with sharing keyword ensures that the Apex code respects the object-level, field-level, and record-level sharing settings for the user who is running the Apex code. This means that the code will only return records that the user has access to, according to their Sharing Settings. You can find more information about the with sharing keyword in the official Salesforce documentation (https://developer.salesforce.com/docs/atlas.en-us.apexcode.meta/apexcode/apex_classes_keywords_sharing.htm).
NEW QUESTION # 32
What does the Lightning Component framework provide to developers?
- A. Prebuilt component that can be reused.
- B. Support for Classic and Lightning UIS.
- C. Templates to create custom components.
- D. Extended governor limits for applications
Answer: A
NEW QUESTION # 33
niversal Containers (UC) processes orders in Salesforce in a custom object, Crder_c. They also allow sales reps to upload CSV files with of orders at a time.
A developer is tasked with integrating orders placed in Salesforce with UC's enterprise resource planning (ERP) system.
'After the status for an Craer__c is first set to "Placed', the order information must be sent to a REST endpoint in the ERP system that can process ne order at a time.
What should the developer implement to accomplish this?
- A. Callout from a queseatie class called from a trigger
- B. Flow with 2 callout from an invocable method
- C. Callout from a Sarchabie class called from a scheduled job
- D. Callout from an surare method called from a trigger
Answer: D
NEW QUESTION # 34
Which two settings must be defined in order to update a record of a junction object? Choose 2 answers
- A. Read/Write access on the primary relationship
- B. Read/Write access on the junction object
- C. Read access on the primary relationship
- D. Read/Write access on the secondary relationship
Answer: A,D
NEW QUESTION # 35
Universal Containers stores the availability date on each Line Item of an Order and Orders are only shipped when all of the Line Items are available. Which method should be used to calculate the estimated ship date for an Order?
- A. Use a LATEST formula on each of the latest availability date fields.
- B. Use a CEILING formula on each of the Latest availability date fields.
- C. Use a DAYS formula on each of the availability date fields and a COUNT Roll-Up Summary field on the Order.
- D. Use a Max Roll-Up Summary field on the Latest availability date fields.
Answer: D
NEW QUESTION # 36
Which two types of process automation can be used to calculate the shipping cost for an Order when the Order is placed and apply a percentage of the shipping cost of some of the related Order Products?
Choose 2 answers
- A. Approval Process
- B. Process Builder
- C. Workflow Rule
- D. Flow Builder
Answer: B,D
NEW QUESTION # 37
A developer created these three Rollup Summary fields in the custom object, Project_ct,
The developer is asked to create a new field that shows the ratio between rejected and approved timesheets for a given project.
Which should the developer use to Implement the business requirement in order to minimize maintenance overhead?
- A. Record-triggered Flow
- B. Apex Trigger
- C. Formula field
- D. Process Builder
Answer: C
NEW QUESTION # 38
Given the following code snippet, that is part of a custom controller for a Visualforce page:
In which two ways can the try/catch be enclosed to enforce object and field-level permissions and prevent the DML statement from being executed if the current logged-in user does not have the appropriate level of access? Choose 2 answers
- A. Use if (Schema, sobjectType, Contact, isUpdatable ( ) )
- B. Use if (Schema , sobjectType. Contact. Field, Is_Active_c. is Updateable ( ) )
- C. Use if (Schema.sObjectType.Contact.isAccessible ( ) )
- D. Use if (thisContact.Owner = = UserInfo.getuserId ( ) )
Answer: A,B
NEW QUESTION # 39
In the Lightning UI, where should a developer look to find information about a Paused Flow Interview?
- A. On the Paused Row Interviews related List for a given record
- B. On the Paused Row Interviews component on the Home page
- C. In the Paused Interviews section of the Apex Flex Queue
- D. In the system debug log by Altering on Paused Row Interview
Answer: C
NEW QUESTION # 40
Which three operations affect the number of times a trigger can fire?
Choose 3 answers
- A. Process Flows
- B. Email messages
- C. Roll-Up Summary fields
- D. Workflow Rules
- E. Criteria-based Sharing calculations
Answer: A,C,D
NEW QUESTION # 41
A developer is tasked with performing a complex validation using Apex as part of advanced business logic. certain criteria are met for a PurchaseOrder, the developer must throw a custom exception.
What is the correct way for the developer to declare a class that can be used as an exception?
- A. public class PurchaseOrderException implements Exception ()
- B. public class PurchaseOrder implements Exception ()
- C. public class PurchaseOrderException extends Exception ()
- D. public class PurchaseOrder extends Exception ()
Answer: C
NEW QUESTION # 42
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