10+ Salesforce Developer Trainee Interview Questions and Answers

A class is a blueprint or template for creating objects, while an object is an instance of a class.

• A class defines the properties and behaviors of objects, while an object is a specific instance of a class.

• Classes can be thought of as a blueprint, while objects are the actual buildings constructed from that blueprint.

• Multiple objects can be created from a single class, each with its own unique set of properties and behaviors.

• Classes can have inheritance, where one class can i...read more

Salesforce has various APIs like SOAP API, REST API, Bulk API, Metadata API, Streaming API, etc.

• SOAP API - used for creating, updating, deleting, and querying records

• REST API - used for integrating Salesforce with external apps

• Bulk API - used for loading or deleting large sets of data

• Metadata API - used for managing customizations and building tools that can manage the metadata model

• Streaming API - used for delivering near real-time data updates

VS code is an integrated development environment for coding, while GitHub is a platform for version control and collaboration on code.

• VS code is used for writing, editing, and debugging code in various programming languages.

• GitHub is used for storing code repositories, tracking changes, and collaborating with other developers.

• VS code can be integrated with GitHub for seamless version control and code collaboration.

• Developers can use VS code to push code changes to GitHub repo...read more

Polymorphism is the ability of an object to take on many forms.

• It allows objects of different classes to be treated as if they are objects of the same class.

• It is achieved through method overriding and method overloading.

• Example: A parent class Animal can have child classes like Dog, Cat, and Bird. All these child classes can inherit the properties of the parent class and have their own unique properties and methods.

• Polymorphism helps in achieving code reusability and flexibi...read more

Method overriding is a feature in object-oriented programming where a subclass provides its own implementation of a method that is already defined in its parent class.

• Method overriding is used to achieve runtime polymorphism.

• The method in the subclass must have the same name, return type, and parameters as the method in the parent class.

• The access level of the overriding method cannot be more restrictive than the overridden method.

• Example: class Dog extends Animal { void make...read more

XOR gate outputs true only when inputs are different

• XOR gate has 2 inputs and 1 output

• Output is true only when inputs are different, otherwise false

• Truth table: 0 XOR 0 = 0, 0 XOR 1 = 1, 1 XOR 0 = 1, 1 XOR 1 = 0

SOSL is Salesforce Object Search Language used to perform text searches in Salesforce data. SOQL is Salesforce Object Query Language used to query Salesforce data.

• SOSL is used to search multiple objects in Salesforce for specific text-based information

• SOQL is used to query Salesforce data to retrieve specific records based on specified criteria

• SOSL uses FIND keyword to search for specific text in multiple objects

• SOQL uses SELECT keyword to retrieve specific fields from Salesf...read more

Validation rule ensures data entered meets certain criteria before it is saved in the database.

• Validation rules are used to enforce business logic and data quality standards.

• They can be used to require certain fields to be filled out, restrict values that can be entered, or perform complex checks.

• Examples include ensuring a phone number is in a specific format, or that a discount cannot exceed a certain percentage.

Inheritance is a mechanism in object-oriented programming where a new class is created from an existing class.

• It allows the new class to inherit the properties and methods of the existing class.

• The existing class is called the parent or superclass, while the new class is called the child or subclass.

• The child class can add new properties and methods or override the ones inherited from the parent class.

• Inheritance promotes code reuse and makes it easier to maintain and update ...read more

Profiles and permission sets are used in Salesforce to control access to objects, fields, and other features.

• Profiles are used to control overall access to objects, fields, and features for a user or group of users.

• Permission sets are used to grant additional permissions to users beyond what is specified in their profile.

• Profiles are assigned to users when they are created, while permission sets can be assigned at any time.

• Profiles are used to define the baseline access for a...read more

Salesforce is a cloud-based customer relationship management (CRM) platform that helps businesses manage their sales, customer service, marketing, and more.

• Cloud-based CRM platform

• Helps businesses manage sales, customer service, marketing, etc.

• Offers various tools and features for customization and automation

• Used by companies of all sizes across different industries

Batch class in Salesforce is used to process large amounts of data in chunks to avoid hitting governor limits.

• Batch class implements the Database.Batchable interface in Salesforce

• It allows you to break down a large job into smaller chunks for processing

• You can specify the size of each batch and the number of batches to run in parallel

• Batch class is useful for processing large data sets, such as updating records or sending emails in bulk