100+ Salesforce Interview Questions and Answers

A null pointer exception occurs when a program tries to access a memory address that is null or invalid.

• Occurs in programming languages like Java when trying to access an object or variable that is null

• Can be caused by not properly initializing a variable before using it

• Example: int[] arr = null; int x = arr.length; // This will throw a null pointer exception

SOC stands for Security Operations Center. It is a centralized unit that monitors and manages an organization's security posture.

• SOC is responsible for detecting, analyzing, and responding to security incidents.

• It uses various tools and technologies to monitor the organization's network, systems, and applications.

• SOC analysts investigate security alerts and incidents to determine their severity and impact.

• They also develop and implement security policies and procedures to pre...read more

Our product is a cloud-based project management software that streamlines team collaboration and increases productivity.

• Our software offers real-time communication and task tracking features.

• It allows for easy delegation of tasks and project timelines.

• Integrates with popular tools like Slack and Trello.

• Customizable dashboards and reporting for project progress.

• Affordable pricing plans for businesses of all sizes.

Yes, I am willing to travel for the role.

• I am open to traveling for work-related purposes.

• I understand that travel may be required for client meetings or training sessions.

• I am flexible and adaptable to different travel schedules and destinations.

Design a live streaming platform for seamless video streaming experience.

• Implement a robust video encoding and transcoding system to support various devices and internet speeds.

• Utilize a content delivery network (CDN) to reduce latency and ensure high-quality streaming.

• Incorporate adaptive bitrate streaming to adjust video quality based on user's internet connection.

• Include features like live chat, viewer analytics, and monetization options for content creators.

• Ensure scalabi...read more

The question is about finding the area of a histogram and the Kth largest value.

• Calculate the area of the histogram by multiplying the width and height of each bar and summing them up.

• Find the Kth largest value by sorting the data and selecting the Kth element.

• The Kth largest value can also be found using a heap data structure.

• Example: Histogram area of [2, 3, 1, 4, 5] with bar width of 1 is 15. The 3rd largest value is 3.

Finding the Kth largest element in an array.

• Sort the array and return the Kth element from the end

• Use a max heap to keep track of the K largest elements

• Use quickselect algorithm to find the Kth largest element

Developed a web-based project management tool for tracking tasks and deadlines.

• Used AngularJS for front-end development

• Implemented RESTful APIs for backend using Node.js

• Utilized MongoDB for database storage

Design a messaging app like Whatsapp

• End-to-end encryption for secure messaging

• Ability to send text, images, videos, and documents

• Group chat feature for multiple users

• Voice and video calling functionality

• Status updates for sharing moments with contacts

Implement Kmeans algorithm from scratch

• Initialize k centroids randomly

• Assign each data point to the nearest centroid

• Update centroids based on the mean of data points assigned to them

• Repeat until convergence criteria is met

Sales Cloud is a customer relationship management (CRM) platform by Salesforce that helps businesses manage their sales processes.

• Sales Cloud allows businesses to track customer interactions and manage leads, opportunities, and accounts.

• It provides tools for sales forecasting, pipeline management, and performance analytics.

• Sales Cloud integrates with other Salesforce products like Service Cloud and Marketing Cloud for a complete CRM solution.

Polymorphism is the ability of a single function or method to operate on different types of data.

• Polymorphism allows objects of different classes to be treated as objects of a common superclass.

• It enables a single interface to represent multiple underlying forms.

• Examples include method overloading and method overriding in object-oriented programming.

Decorators in LWC are used to add metadata to class properties or methods.

• Decorators are declared with the @ symbol before the name, like @api or @wire.

• They are used to define public properties, wire adapters, and event handlers in LWC.

• Example: @api property or @wire(getRecord, { recordId: '$recordId' }) wired method.

Design a reminder service for scheduling and sending reminders to users.

• Create a database to store user information and reminders.

• Implement a scheduling system to send reminders at specified times.

• Allow users to set up recurring reminders.

• Include options for different types of reminders (e.g. email, SMS, push notification).

Design a document store server for efficient storage and retrieval of documents.

• Consider using a NoSQL database like MongoDB for flexible schema and scalability.

• Implement a RESTful API for interacting with the document store.

• Include features like search functionality, version control, and access control.

• Optimize storage and retrieval performance by using indexing and caching.

• Ensure data security and backup mechanisms are in place to prevent data loss.

Design a library system for efficient management of books and resources.

• Consider user-friendly interface for searching and borrowing books

• Implement a database to store information about books, users, and transactions

• Include features like book reservation, due date reminders, and late fee calculation

• Integrate a system for tracking book availability and location within the library

High level system design involves creating an abstract representation of the system and its components.

• Identify the system's main components and their interactions

• Determine the system's architecture and design patterns

• Consider scalability, reliability, and maintainability

• Use diagrams and models to visualize the system's structure and behavior

Surrogate key is a unique identifier used in databases to uniquely identify each record in a table.

• Surrogate keys are typically generated by the system and have no business meaning.

• They are used to simplify database operations and improve performance.

• Example: Using an auto-incrementing integer column as a surrogate key in a table.

A palindrome for a string is a word, phrase, number, or other sequence of characters that reads the same forward and backward.

• Check if the string is equal to its reverse to determine if it is a palindrome.

• Ignore spaces and punctuation when checking for palindromes.

• Examples: 'racecar', 'madam', '1221'

Designing Ms Teams involves creating channels, setting up permissions, integrating apps, and customizing notifications.

• Create different channels for different teams or projects

• Set up permissions to control access to channels and files

• Integrate apps like Trello, Asana, or Salesforce for seamless workflow

• Customize notifications to ensure important messages are not missed