10+ Linux Laboratories Interview Questions and Answers

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

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)

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.

Life Cycle Hooks of Lightning Web Components (LWC) are methods that allow developers to interact with the component at specific stages of its life cycle.

• constructor() - Initializes the component.

• connectedCallback() - Called when the component is inserted into the DOM.

• disconnectedCallback() - Called when the component is removed from the DOM.

• renderedCallback() - Called after the component's elements are rendered.

• errorCallback() - Called when an error occurs during rendering.

• re...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

There are various types of Trigger Frameworks like Handler Pattern, Service Layer Pattern, and Trigger Handler Class Pattern.

• Handler Pattern: Separate logic into handler classes for each trigger event.

• Service Layer Pattern: Use a service layer to handle trigger logic.

• Trigger Handler Class Pattern: Use a single trigger handler class to manage all trigger logic.

• Common usage includes organizing trigger logic, reducing code duplication, and improving code maintainability.

Chaining in batch classes allows for processing of large data sets by breaking them into smaller batches.

• Chaining is implemented by using the finish method in a batch class to start another batch job.

• The finish method checks if there are more records to process and if so, it creates a new instance of the batch class.

• This process continues until all records have been processed.

• Chaining helps in handling large data volumes efficiently by breaking them into manageable chunks.

Apex Cursors in Salesforce are used to process records returned by SOQL queries in batches.

• Apex Cursors are used to efficiently process large sets of data in Salesforce.

• They are used with SOQL queries to retrieve and process records in batches.

• Cursors help in avoiding governor limits and improving performance.

• Examples include using 'FOR' loops with SOQL queries to process records in chunks.

Declarative tools are point-and-click tools provided by Salesforce to customize and automate processes without writing code.

• Declarative tools include Process Builder, Flow Builder, Workflow Rules, and Validation Rules.

• They allow users to create automation, validation, and customization without the need for coding.

• Declarative tools are user-friendly and can be used by non-developers to configure Salesforce to meet specific business needs.

An approval process is a way to automate how records are approved in Salesforce.

• Allows defining the steps necessary for a record to be approved

• Can include criteria for approval, rejection, and reassignment

• Can be triggered based on certain conditions or manually by users

• Can involve multiple approvers with different levels of authority

• Can be used for various processes like document approvals, expense reports, etc.

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

• Provides a centralized platform for managing customer interactions and data

Github is a version control system that allows for collaboration, code review, and easy management of code changes.

• Github allows for easy collaboration with other developers on a project

• It provides a platform for code review and feedback

• Github makes it easy to manage changes to code and keep track of versions

• It also allows for easy integration with other tools and services, such as continuous integration and deployment

• Github provides a centralized location for code, making it...read more

The market trend for digital transformation is rapidly growing.

• Digital transformation is becoming a necessity for businesses to stay competitive.

• Cloud computing, artificial intelligence, and big data analytics are driving the trend.

• Companies are investing heavily in digital transformation initiatives.

• The COVID-19 pandemic has accelerated the adoption of digital technologies.

• The market for digital transformation is expected to reach $1.3 trillion by 2025.