500+ Salesforce Developer Interview Questions and Answers

SOQL query to fetch description field from Account and reason for inability to filter

• SOQL query: SELECT Description FROM Account

• Description field is not filterable because it is a long text field

• Long text fields cannot be filtered in SOQL queries

Trigger to assign or create a Test Account for Contacts without an associated Account.

• Use an 'after insert' trigger on the Contact object.

• Query for existing 'Test Account' to avoid duplicates.

• If no Account is associated with the Contact, assign the existing 'Test Account'.

• If no 'Test Account' exists, create one and associate it with the Contact.

• Ensure to handle bulk inserts to avoid governor limits.

Flows can be invoked using other flows and Apex. Apex classes can be invoked from a flow by using invocable methods and passing variables as input parameters.

• To invoke a flow from another flow, use the 'Launch Flow' element in the Flow Designer.

• To invoke an Apex class from a flow, create an invocable method in the Apex class and annotate it with @InvocableMethod.

• Pass variables from a flow to an Apex class by defining input parameters in the invocable method.

• In the flow, use t...read more

Bulkify a trigger to count child records and update parent records efficiently in Salesforce.

• Use a Map to store parent records and their corresponding child counts.

• Query all relevant child records in a single SOQL query to avoid governor limits.

• Iterate through the child records and populate the Map with counts.

• Update the parent records in bulk after processing all child records.

• Example: If a parent Account has multiple Contacts, count them and update a custom field on the Acc...read more

Apex code can be called using process builder by creating an Apex action and invoking it in the process builder.

• Create an Apex class with a method that performs the desired functionality

• In the process builder, create a new action and select the Apex class and method

• Configure the input and output variables for the Apex action

• Add the Apex action to the process builder flow

• Activate the process builder

Triggers are automated actions that are executed when a specific event occurs in a Salesforce database.

• Triggers are used to perform custom actions before or after specific events, such as inserting, updating, or deleting records.

• Triggers can be used to enforce business rules, validate data, or update related records.

• Triggers are written in Apex code and can be used to extend the functionality of Salesforce beyond its standard capabilities.

• For example, a trigger can be used to...read more

To run an Apex class, we need to create an instance of the class and call its methods. Precautions include testing and avoiding governor limits.

• Create an instance of the class using the 'new' keyword

• Call the methods using dot notation

• Test the class thoroughly before deploying to production

• Avoid hitting governor limits by optimizing code and limiting queries

Various types of custom objects in Salesforce and their extensions

• Standard custom objects (ending with __c)

• Custom metadata types (ending with __mdt)

• Custom settings (ending with __c)

• External objects (ending with __x)

• Big objects (ending with __b)

I prefer using the Database.update method in a Batch Class for updating a list of records.

• Database.update is bulkified and can handle large volumes of records efficiently

• It allows for partial success handling, where some records can be updated even if others fail

• It automatically triggers any necessary validation rules and workflows

• It is recommended for use in Batch Classes to ensure optimal performance

Wire method in Salesforce is used to fetch data from Apex controller to Lightning Web Component. Adding records inside wire method in JS file involves using imperative Apex to create records.

• Use @wire decorator in Lightning Web Component JS file to call an Apex method

• Inside the wire method, use imperative Apex to create records by calling the createRecord method from the Lightning Data Service

• Pass the record data as parameters to the createRecord method

Salesforce Developer interview questions on sharing, null vs isblank, and challenging scenario.

• Sharing determines the level of access to records for users and groups.

• Without sharing means that access to records is not restricted by sharing rules.

• Null means that a field has no value, while isblank checks if a field is null or empty.

• Challenging scenario in previous role involved integrating multiple systems with complex data mappings.

Batchable interface has three methods: start(), execute(), and finish().

• start() method is used to initialize the batch job and return the query locator.

• execute() method is used to process the records returned by the query locator.

• finish() method is used to perform any final operations after the batch job completes.

Power electronics is the application of electronics to control and convert electrical power.

• Power electronics involves the use of semiconductor devices such as diodes, transistors, and thyristors to control and convert electrical power.

• The architecture of the ic2716 is a 16Kbit EPROM (erasable programmable read-only memory) with a 24-pin DIP (dual in-line package) configuration.

• The ic2716 is commonly used in microcontroller and embedded systems for storing program code and da...read more

Quable Apex is a tool that allows developers to write and test Apex code in a more efficient and organized way.

• Quable Apex provides a structured way to organize Apex code

• It allows developers to write and test code in a more efficient manner

• Quable Apex includes features such as code versioning and deployment management

• It can be integrated with Salesforce's development tools such as the Force.com IDE

To convert Json data into string in LWC, use JSON.stringify() method.

• Use JSON.stringify() method to convert Json data into string in LWC.

• Yes, callouts can be made from LWC using imperative Apex.

• Precautions before writing queueable Apex class include governor limits, bulkification, and error handling.

• Platform events can be used for inter-component communication in LWC.

• To communicate unrelated LWC components, use Lightning Message Service or Custom Events.

User may not see all records due to sharing settings, role hierarchy, or record ownership restrictions.

• Sharing Rules: If sharing rules are set up, users may only see records shared with them.

• Role Hierarchy: Users in lower roles may not see records owned by users in higher roles.

• Record Ownership: Users can only see records they own unless sharing rules allow otherwise.

• Field-Level Security: Even with object permissions, field-level security may restrict visibility of certain fi...read more

Java is a popular programming language with features like OOP, platform independence, and exception handling. JDK8 is a version of Java with new features.

• Java is an object-oriented programming language

• JDK8 introduced features like lambda expressions and streams

• Exceptions are used to handle errors and unexpected events

• List, Set, and Map are data structures in Java

• Spring Boot is a framework for building web applications

Understanding the problem and writing clean, efficient, and maintainable code are important for coding as a developer.

• Understanding the problem and requirements

• Writing clean and efficient code

• Maintaining code quality and readability

• Testing and debugging

• Continuous learning and improvement

• Collaboration and communication with team members

Trigger to display child contacts on account and inline lightning component

• Create a trigger on Account object

• Query for child Contact records related to the Account

• Display the Contact records in a related list on the Account page layout

• Create an inline lightning component to display additional information on the Account page

Write a trigger on account object to insert 2 contacts when account is created.

• Create a trigger on Account object

• Use 'after insert' trigger event

• Create 2 Contact records and assign Account Id to them

• Insert the Contact records

Salesforce is a cloud-based CRM platform that helps businesses manage customer interactions and automate sales processes.

• Objects are database tables that store data in Salesforce

• Fields are columns in the database tables that store specific types of data

• Relationships define how objects are related to each other in the database

• OWD (Organization-Wide Default) settings determine the default level of access to records for users in an organization

• Profiles and roles control access t...read more

Singleton Pattern ensures a class has only one instance and provides a global point of access to it.

• Singleton Pattern is implemented by creating a private constructor, a static variable to hold the instance, and a static method to return the instance.

• The static method checks if the instance is null, creates a new instance if it is, and returns the existing instance if not.

• Example: public class SingletonExample { private static SingletonExample instance; private SingletonExamp...read more

Apex is a strongly typed programming language.

• Apex is a strongly typed language, meaning variables must be declared with a specific data type.

• Data types in Apex include primitives like Integer, String, Boolean, as well as custom objects and collections.

• Strong typing helps catch errors at compile time rather than runtime, improving code reliability and performance.

To call child to parent in Lightning aura, use events and event handlers.

• Create an event in the child component

• Register the event in the parent component

• Create an event handler in the parent component

• Fire the event from the child component

• Handle the event in the parent component

• Pass data between the child and parent components using event attributes

You can change the create date while uploading records through Data Loader by enabling the 'Allow Insert' option.

• Enable 'Allow Insert' option in Data Loader settings

• Map the 'Created Date' field in the mapping file to the desired date/time value

• Ensure the user has the necessary permissions to change the create date

Count the number of cases related to an account using SOQL and best practices in Salesforce.

• Use SOQL to query the Case object with a WHERE clause filtering by the AccountId.

• Example: SELECT COUNT() FROM Case WHERE AccountId = '001XXXXXXXXXXXX'

• Consider using aggregate functions for efficiency.

• Ensure proper indexing on the AccountId field for faster query performance.

• Use a trigger or process builder if you need real-time updates on case counts.

Overloading constructor in Python allows creating multiple constructors with different parameters.

• Define multiple constructors with different parameters

• Use default values for optional parameters

• Call the appropriate constructor based on the number and type of arguments passed