Question 1

Management asked for opportunities to be automatically created for accounts with annual revenue
greater than $1, 000,000. A developer created the following trigger on the Account object to satisfy
this requirement.
CRT-450 practice exam questions

Users are able to update the account records via the UI and can see an opportunity created for high
annual revenue accounts. However, when the administrator tries to upload a list of 179 accounts
using Data Loader, it fails with system, Exception errors.
Which two actions should the developer take to fix the code segment shown above?
Choose 2. answers

Accepted Answer

A, C

Explanation: The provided trigger code is not "bulkified," meaning it cannot handle multiple records in a single transaction. The code places a SOQL query and a DML insert statement inside a for loop. When Data Loader processes 179 records, the trigger attempts to execute 179 separate SOQL queries and up to 179 DML statements. This exceeds the synchronous governor limits of 100 SOQL queries and 150 DML statements per transaction, causing a System.LimitException. To fix this, the code must be refactored to perform all data retrieval and data modification operations outside of any loops. This involves querying for all existing opportunities in a single query before the loop and inserting all new opportunities in a single DML call after the loop.

Question 2

A developer created a child Lightning web component nested inside a parent Lightning web
component. The parent component needs to pass a string value to the child component.
In which two ways can this be accomplished?
Choose 2 answers

Accepted Answer

A, B

Explanation: Communication from a parent Lightning Web Component (LWC) to a nested child LWC is accomplished through two primary mechanisms. The first is declaratively, by setting a public property on the child component. The child exposes a property using the @api decorator, which the parent can then set in its markup. The second is imperatively, where the parent component gets a reference to the child and calls a public method, also exposed via the @api decorator, passing the string value as an argument. Both are standard, documented patterns for parent-to-child data flow.

Question 3

A developer needs to implement a custom SOAP Web Service that is used by an external Web Application. The developer chooses to include helper methods that are not used by the Web Application in the implementation of the Web Service Class. Which code segment shows the correct declaration of the class and methods? A) https://kxbjsyuhceggsyvxdkof.supabase.co/storage/v1/object/public/file-images/CRT-450/page_37_img_1.jpg B) https://kxbjsyuhceggsyvxdkof.supabase.co/storage/v1/object/public/file-images/CRT-450/page_37_img_2.jpg C) https://kxbjsyuhceggsyvxdkof.supabase.co/storage/v1/object/public/file-images/CRT-450/page_37_img_3.jpg D) https://kxbjsyuhceggsyvxdkof.supabase.co/storage/v1/object/public/file-images/CRT-450/page_37_img_4.jpg

Accepted Answer

D

Explanation: To implement a custom SOAP web service in Apex, the class must be declared with the global access modifier. Methods that are intended to be exposed to external applications via the WSDL must be declared as both global and static, and they must use the webservice keyword. Helper methods, which are for internal use within the class and should not be exposed in the WSDL, must be defined without the webservice keyword. Option D correctly follows this structure by defining a global class, a webservice global static method for external access, and a public helper method that remains internal to the Salesforce organization.

Question 4

A developer needs to make a custom Lightning Web Component available in the Salesforce Classic user interface Which approach can be used to accomplish this?

Accepted Answer

B

Explanation: The officially sanctioned method for displaying a Lightning Web Component (LWC) within the Salesforce Classic UI is to use the Lightning Out JavaScript library. This technology is specifically designed to surface Lightning components (both Aura and LWC) in an external container, such as a Visualforce page. The process involves referencing a Lightning dependency app from the Visualforce page and then using the $Lightning.use() and $Lightning.createComponent() JavaScript functions to dynamically create and display the component within the page. This Visualforce page can then be embedded into a standard page layout in Classic.

Question 5

https://kxbjsyuhceggsyvxdkof.supabase.co/storage/v1/object/public/file-images/CRT-450/page_47_img_1.jpg When the code executes, a DML exception is thrown. How should a developer modify the code to ensure exceptions are handled gracefully?

Accepted Answer

C

Explanation: The most appropriate and direct method to handle exceptions gracefully in Apex is by using a try/catch block. Placing the DML statement (insert accts;) inside a try block allows the program to attempt the operation. If a DmlException occurs—as it will in this scenario due to the missing required Name field—the catch block will execute. This prevents the program from terminating abruptly and allows the developer to implement logic to log the error, display a user-friendly message, or attempt a recovery action, thus ensuring the exception is handled gracefully.

Question 6

Given the following Apex statement: Account myAccount = [SELECT Id, Name FROM Account); What occurs when more than one Account is returned by the SOQL query?

Accepted Answer

B

Explanation: The Apex syntax sObject variable = [SOQLquery]; is specifically designed to assign a single record to an sObject variable. If the SOQL query returns more than one record, the Apex runtime environment throws a System.QueryException with the error message "List has more than 1 row for assignment". If this exception is not handled within a try-catch block, it is considered an unhandled exception, which immediately terminates the transaction and prevents further code execution.

Question 7

How many Accounts will be inserted by the following block of code? https://kxbjsyuhceggsyvxdkof.supabase.co/storage/v1/object/public/file-images/CRT-450/page_44_img_1.jpg

Accepted Answer

C

Explanation: The Apex code executes two distinct DML (Data Manipulation Language) operations within a single transaction. 1. The first insert accts; statement successfully inserts 150 Account records into the database. This operation completes without error. 2. The second insert accts2; statement attempts to insert 100 new Account records. However, the names of these records (e.g., 'Account 0', 'Account 1') duplicate those created in the first step. This will cause a DmlException, assuming a standard duplicate rule or unique index is in place on the Account Name. 3. The try...catch block successfully catches this DmlException. Because the exception is caught, it does not propagate and does not cause the entire transaction to roll back. Therefore, the results of the first successful DML operation are committed, while the second DML operation fails and its changes are discarded. The net result is 150 inserted records.

Question 8

Which action causes a before trigger to fire by default for Accounts?

Accepted Answer

C

Explanation: Apex triggers are designed to execute in response to Data Manipulation Language (DML) operations such as insert, update, or upsert. Importing data using the Data Loader, whether with the SOAP API or the Bulk API, directly performs these DML operations on records. By default, these operations invoke the standard Salesforce order of execution, which includes firing any before triggers on the target object (in this case, Accounts) for each batch of records processed. This is a fundamental and expected behavior of data loading via the API.

Question 9

Universal Containers (UC) wants to lower its shipping cost while making the shipping process more
efficient. The Distribution Officer advises UC to implement global addresses to allow multiple
Accounts to share a default pickup address. The developer is tasked to create the supporting object
and relationship for this business requirement and uses the Setup Menu to create a custom object
called "Global Address".
Which field should the developer add to create the most efficient model that supports the business
need?

Accepted Answer

C

Explanation: The business requirement is for multiple Account records to share a single Global Address record. This describes a many-to-one relationship, where Account is the "many" side and Global Address is the "one" side. To model this, the relationship field must be created on the "many" object (Account) and point to the "one" object (Global Address). A lookup relationship is the correct choice as it creates this association. A master-detail relationship is not possible because a standard object (Account) cannot be on the detail side of a relationship with a custom object (Global Address).

Question 10

A custom picklist field, Pool Preference ¢, exists on a custom object. The picklist contains the
following options: ‘Vegan’, ‘Kosher’, 'No Preference’. The developer must ensure a value is populated
every time a record is created or updated.
What is the optimal way to ensure a value is selected every time a record is saved?

Accepted Answer

D

Explanation: The most optimal and robust method to ensure a field is always populated is by marking it as "Required" on the field's definition. This declarative setting enforces the rule at the data model level, guaranteeing that no record can be created or updated without a value in this field, regardless of the entry point (e.g., user interface, API, Data Loader). This approach is superior to UI-level requirements or programmatic solutions for universal data integrity.

Question 11

Universal Containers decides to use exclusively declarative development to build out a new
Salesforce application.
Which three options should be used to build out the database layer for the application?
Choose 3 answers

Accepted Answer

A, C, D

Explanation: The database layer in a Salesforce application refers to the data model, which is the structure that holds the application's data. In a declarative model, this structure is built using point-and-click tools. 1. Custom objects and fields are the foundational elements, analogous to tables and columns in a traditional database. 2. Relationships (e.g., Master-Detail, Lookup) are crucial for defining how objects connect and relate to one another, forming the relational structure of the database. 3. Roll-up summaries are special fields on a master object that aggregate data from related detail records. They are a declarative part of the data model as they define a calculated value stored directly on the object.

Question 12

A developer creates a batch Apex job to update a large number of records, and receives reports of the job timing out and not completing. What is the first step towards troubleshooting the issue?

Accepted Answer

A

Explanation: The first and most fundamental step in troubleshooting any asynchronous Apex job, including a Batch Apex job, is to check its status on the Asynchronous Jobs monitoring page. This page, found in Salesforce Setup, provides a high-level overview of all asynchronous processes. It displays the job's status (e.g., Processing, Completed, Failed, Aborted), the number of batches processed, and any specific error messages. This initial check is essential to confirm the failure and get the primary error details before proceeding to more granular diagnostics like analyzing specific debug logs.

Question 13

A developer needs to confirm that a Contact trigger works correctly without changing the organization's data. What should the developer do to test the Contact trigger?

Accepted Answer

C

Explanation: Apex test methods are the standard mechanism for verifying the functionality of triggers and classes. A critical feature of the Apex testing framework is that any database changes (DML operations) made during a test run are not committed to the organization's database. The transaction is automatically rolled back upon completion. This allows the developer to simulate record creation, updates, and deletions to fire the trigger and assert its behavior without altering any persistent organizational data, directly fulfilling the requirements of the scenario. The Developer Console provides a user interface to run these test classes.

Question 14

Which three code lines are required to create a Lightning component on a Visualforce page? Choose 2 answers

Accepted Answer

A, B, C

Explanation: To host a Lightning component on a Visualforce page, a three-step process known as Lightning Out is required. First, the tag is added to the Visualforce page, which includes the necessary lightning.out.js library. Second, the $Lightning.use() JavaScript function references a Lightning dependency app, which makes the required components available. Finally, inside the callback function of $Lightning.use(), the $Lightning.createComponent() function is called to dynamically create an instance of the component and inject it into the page's DOM. All three are essential and work in sequence.

Question 15

A developer creates a custom exception as shown below: public class ParityException extends Exception { } What are two ways the developer can fire the exception in Apex?

Accepted Answer

A, B

Explanation: In Apex, "firing" or "raising" an exception is accomplished using the throw statement. This statement interrupts the normal execution flow and passes an instantiated exception object to the runtime. Options A and B both correctly use the throw keyword followed by the instantiation of the ParityException object using the new keyword. Although the custom ParityException class does not explicitly define constructors, it inherits them from the base Exception class. This includes a no-argument constructor (used in A) and a constructor that accepts a String message (used in B). Apex is case-insensitive for class and variable names, so parityException resolves to ParityException.

Free Salesforce Platform Developer CRT-450 Actual Exam Questions