SALESFORCE-PD1 Developer Fundamentals — 20 Questions

Question 1

What is the maximum number of SOQL queries that can be issued in a single synchronous Apex transaction?

Accepted Answer

100. The synchronous governor limit for SOQL queries is 100 queries per transaction.

Answer

50

Answer

200

Answer

500

Question 2

A developer needs to retrieve Account records along with their associated Contacts in a single query. Which query syntax is correct?

Accepted Answer

SELECT Id, Name, (SELECT Id, LastName FROM Contacts) FROM Account. Parent-to-child subqueries use plural child relationship names enclosed in parentheses inside the SELECT clause.

Answer

SELECT Id, Name, CONCAT(Contacts) FROM Account

Answer

SELECT Id, Name, (SELECT Id, LastName FROM Contact) FROM Account

Answer

SELECT Id, Name, Contacts__r FROM Account

Question 3

A developer needs to ensure that an Apex class respects organization-wide defaults, role hierarchies, and sharing rules when querying custom objects. Which keyword should be added to the class definition?

Accepted Answer

with sharing. The with sharing keyword enforces sharing rules of the current user, while without sharing runs in system mode.

Answer

enforce sharing

Answer

without sharing

Answer

inherited sharing

Question 4

An enterprise application requires Apex code to check whether the current user has read access to a specific custom field before displaying it in a custom Lightning Web Component. What is the most appropriate class to use?

Accepted Answer

Schema.DescribeFieldResult. The Schema.DescribeFieldResult class provides methods like isAccessible() to check Field-Level Security (FLS) dynamically.

Answer

System.Security

Answer

UserInfo

Answer

ApexPages.StandardController

Question 5

A developer writes an Apex method that executes a SOQL query using user-supplied search parameters. How can the developer protect against SOQL injection vulnerabilities?

Accepted Answer

Use bind variables in the SOQL query instead of string concatenation.. Using bind variables in SOQL queries automatically sanitizes the input and prevents SOQL injection, unlike string concatenation.

Answer

Execute the query using Database.queryWithBinds() with a restricted access modifier.

Answer

Use String.escapeSingleQuotes() on all user inputs before concatenating into the query string.

Answer

Enclose all dynamic parameters in single quotes within the dynamic SOQL query string.

Question 6

Which Apex data type should a developer use to represent a precise geographic location with latitude and longitude coordinates?

Accepted Answer

Location. The Location primitive data type in Apex is designed specifically to represent geographic locations with latitude and longitude.

Answer

Coordinate

Answer

Address

Answer

GeoPoint

Question 7

An Apex trigger needs to query related Account records for a list of newly inserted Contact records. What is the most robust way to handle the relationship query in SOQL to avoid governor limits?

Accepted Answer

Collect Account IDs into a Set and execute a single SOQL query outside the loop using the IN clause.. Using a parent-to-child or child-to-parent relationship query inside a single SOQL statement executed on the Trigger.new collection prevents hitting the SOQL query governor limit.

Answer

Access standard relationship fields directly without querying if the records are in Trigger.new.

Answer

Loop through each Contact and issue a separate SOQL query for its Account.

Answer

Use the Database.getQueryLocator method with Trigger.new.

Question 8

A developer needs to store a collection of unique customer email addresses in Apex and check for existence efficiently. Which collection type should the developer use?

Accepted Answer

Set. A Set is a collection of unique elements and provides efficient lookup using methods like contains(), making it ideal for checking existence.

Answer

Queueable

Answer

List

Answer

Map

Question 9

Which component of the MVC design pattern in Salesforce Lightning Web Components (LWC) represents the data model and business logic layer?

Accepted Answer

Apex classes and database objects. In Salesforce, the Model layer corresponds to the database and Apex controllers/SOQL queries handling data.

Answer

HTML template files

Answer

CSS style sheets

Answer

JavaScript controller files

Question 10

A developer is writing code that processes untrusted data and wants to automatically strip fields and relationships that the current user cannot access, without throwing an exception. Which feature should be used?

Accepted Answer

Security.stripInaccessible(). The Security.stripInaccessible() method strips fields and SObjects that the user lacks permission to read or create/update, avoiding runtime security exceptions.

Answer

Database.insert(records, AccessType.ENFORCE_ACCESSIBLE)

Answer

Approval.lock()

Answer

Schema.sObjectType.fields.isAccessible()

Question 11

A developer needs to find all records across multiple objects (Contact, Lead, and Account) that contain the exact phrase 'Acme Corp'. Which feature should be used?

Accepted Answer

SOSL FIND clause. SOSL (Salesforce Object Search Language) is designed for text searches across multiple objects simultaneously.

Answer

Database.query() with dynamic bindings

Answer

SOQL query with multiple WHERE clauses

Answer

Global Search API via REST

Question 12

Which type of Apex trigger context variable returns a list of new versions of the sObject records?

Accepted Answer

Trigger.new. Trigger.new contains all the new versions of the sObject records for insert and update triggers.

Answer

Trigger.newMap

Answer

Trigger.old

Answer

Trigger.caller

Question 13

An Apex trigger processes a list of Case records. The developer wants to group the cases by their AccountId. Which data structure is best suited for this grouping?

Accepted Answer

Map>. A Map where the key is the AccountId (Id) and the value is a List of Cases (List) allows efficient grouping of child records by parent ID.

Answer

List<Map<Id, Case>>

Answer

Set<Map<Id, Case>>

Answer

Map<Id, Case>

Question 14

A developer writes an Apex method with the 'inherited sharing' keyword. What is the behavior of this class when invoked from a class declared with 'with sharing'?

Accepted Answer

It enforces sharing rules because the calling class has 'with sharing'.. Inherited sharing classes execute with sharing when invoked from a with sharing context, inheriting the caller's sharing rules.

Answer

It throws a compilation error because sharing modes conflict.

Answer

It executes in system mode without enforcing sharing rules.

Answer

It prompts the user to select a sharing mode at runtime.

Question 15

A developer needs to convert a JSON string representing a list of Account objects into an actual Apex List of Accounts. Which method should be used?

Accepted Answer

JSON.deserialize(jsonString, List<Account>.class). JSON.deserialize() or JSON.deserializeUntyped() are used to parse JSON, and JSON.deserialize(jsonString, TargetType.class) deserializes into strongly typed objects.

Answer

String.valueOf(jsonString)

Answer

JSON.serialize()

Answer

JSON.parse()

Question 16

Which collection method is used to add all elements from one Set into another Set in Apex?

Accepted Answer

addAll(). The addAll() method is available on Set, List, and Map collections to add multiple elements at once.

Answer

merge()

Answer

combine()

Answer

putAll()

Question 17

What is the correct way to declare a constant variable in Apex?

Accepted Answer

final Integer MAX_COUNT = 10;. Constants in Apex are declared using the final keyword combined with static.

Answer

static readonly Integer MAX_COUNT = 10;

Answer

immutable Integer MAX_COUNT = 10;

Answer

const Integer MAX_COUNT = 10;

Question 18

Which method is used to get the number of elements in an Apex List?

Accepted Answer

size(). The size() method returns the number of elements in a List, Set, or Map in Apex.

Answer

getNumElements()

Answer

length()

Answer

count()

Question 19

An Apex trigger needs to prevent duplicate records from being inserted based on a custom external ID field. Which approach should the developer take to optimize query performance and respect governor limits?

Accepted Answer

Collect the external ID values into a Set, query once outside the loop, and use a Map for validation.. Collecting field values into a Set, querying existing records matching that Set in a single query outside of loops, and comparing in memory is the bulkified approach.

Answer

Use Database.upsert with strict mode enabled inside the trigger loop.

Answer

Query the database inside a for loop for every record in Trigger.new.

Answer

Use an asynchronous @future method to validate duplicates after insert.

Question 20

A developer needs to query all Contact records, including those that have been moved to the Recycle Bin. Which SOQL keyword should be used?

Accepted Answer

ALL ROWS. The ALL ROWS clause in SOQL allows queries to return deleted records (from the Recycle Bin) as well as archived tasks and events.

Answer

WITH RECYCLE_BIN

Answer

SYSTEM MODE

Answer

INCLUDE DELETED