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Salesforce Platform Developer I (PDI) Sample Questions (Q74-Q79):

NEW QUESTION # 74
Provide question feedback here (optional):

Based on this code, what is the value of x?

A. 0
B. 1
C. 2
D. 3

Answer: B

Explanation:
The variable isOK is declared but not initialized, so its value is null. The if-else conditions check for specific values of isOK (true or false), but since it is null, none of those conditions are satisfied. The program defaults to the else block, assigning 4 to x.

NEW QUESTION # 75
An org has a single account named 'NoContacts' that has no related contacts. Given the query:
List<Account> accounts = [Select ID, (Select ID, Name from Contacts) from Account where Name='NoContacts']; What is the result of running this Apex?

A. accounts[0].contacts is invalid Apex.
B. accounts[0].contacts is Null.
C. A QueryException is thrown.
D. accounts[0].contacts is an empty Apex.

Answer: D

NEW QUESTION # 76
A developer is creating an application to track engines and their parts. An individual part can be used in different types of engines.What data model should be used to track the data and to prevent orphan records?

A. Create a junction object to relate many engines to many parts through a master-detail relationship
B. Create a lookup relationship to represent how each part relates to the parent engine object.
C. Create a master-detail relationship to represent the one-to-many model of engines to parts.
D. Create a junction object to relate many engines to many parts through a lookup relationship

Answer: A

NEW QUESTION # 77
Universal Containers wants to back up all of the data and attachments in its Salesforce org once month. Which approach should a developer use to meet this requirement?

A. Use the Data Loader command line.
B. Schedule a report.
C. Create a Schedulable Apex class.
D. Define a Data Export scheduled job.

Answer: D

NEW QUESTION # 78
A developer must create a ShippingCalculator class that cannot be instantiated and must include a working default implementation of a calculate method, that sub-classes can override. What is the correct implementation of the ShippingCalculator class?

A. Public abstract class ShippingCalculator {
public virtual void calculate() { /*implementation*/ }
}
B. Public abstract class ShippingCalculator {
public void calculate() { /*implementation*/ }
}
C. Public abstract class ShippingCalculator {
public override calculate() { /*implementation*/ }
}
D. Public abstract class ShippingCalculator {
public abstract calculate() { /*implementation*/ }
}

Answer: A

Explanation:
the extending class can override the existing virtual methods by using the override keyword in the method definition. Overriding a virtual method allows you to provide a different implementation for an existing method https://developer.salesforce.com/docs/atlas.en-us.apexcode.meta/apexcode/apex_classes_extending.htm

NEW QUESTION # 79
......

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