20+ Salesforce Interview Questions and Answers for Freshers

I will remain calm, empathetic, and professional while actively listening to the customer's concerns and finding a solution.

• Remain calm and composed

• Listen actively to understand the customer's concerns

• Show empathy towards the customer's frustrations

• Maintain a professional demeanor throughout the interaction

• Focus on finding a solution to the customer's issue

• Avoid taking the customer's behavior personally

Ajax allows for asynchronous communication between the client and server in JavaScript.

• Ajax stands for Asynchronous JavaScript and XML.

• It allows for making requests to the server without reloading the entire page.

• Asynchronous functions in JavaScript allow for non-blocking code execution.

• Examples of asynchronous functions include setTimeout, setInterval, and fetch API.

The task is to determine the maximum profit that can be achieved by performing up to two buy-and-sell transactions on a given set of stock prices.

• Iterate through the array of stock prices to find the maximum profit that can be achieved by buying and selling stocks at different points.

• Keep track of the maximum profit that can be achieved by considering all possible combinations of buy and sell transactions.

• Ensure that you sell the stock before buying again to adhere to the con...read more

The problem involves finding the optimal strategy to accumulate the maximum amount in a coin game with specific rules.

• Start by considering the base cases where there are only 1 or 2 coins.

• Use dynamic programming to keep track of the maximum amount that can be won at each step.

• Consider the different scenarios when choosing a coin from either end of the line.

• Keep track of the total winnings for both players and choose the optimal strategy to maximize your winnings.

• Implement a r...read more

The task is to return the spiral path of elements in a given matrix.

• Iterate through the matrix in a spiral path by keeping track of boundaries.

• Print elements in the order of top row, right column, bottom row, and left column.

• Continue the spiral path until all elements are printed.

Detect if a singly linked list forms a cycle by checking if a node's next pointer points back to a previous node.

• Traverse the linked list using two pointers, one moving one step at a time and the other moving two steps at a time.

• If the two pointers meet at any point, there is a cycle in the linked list.

• Use Floyd's Cycle Detection Algorithm for efficient detection of cycles in linked lists.

The minimum number of swaps required to sort an array of distinct elements in ascending order.

• Use a hashmap to store the index of each element in the array.

• Iterate through the array and swap elements to their correct positions.

• Count the number of swaps needed to sort the array.

Find the smallest number whose factorial has at least N trailing zeros.

• Calculate the number of 5's in the prime factorization of the factorial to determine the trailing zeros.

• Use binary search to find the smallest number with at least N trailing zeros.

• Consider edge cases like N = 0 or N = 1 for factorial trailing zeros problem.

Calculate the sum of all numbers that can be formed using the digits 3, 4, and 5 with given constraints.

• Iterate through all possible combinations of 3, 4, and 5 based on the given constraints.

• Calculate the sum of each combination and add them up.

• Return the final sum modulo 10^9 + 7.

To reverse a singly linked list of integers, return the head of the reversed linked list.

• Iterate through the linked list, reversing the pointers to point to the previous node instead of the next node.

• Keep track of the previous, current, and next nodes while traversing the list.

• Update the head of the reversed linked list to be the last element of the original list.

The task is to find the longest distances from a source node to all nodes in a weighted directed acyclic graph.

• Implement a function that takes the number of nodes, edges, source node, and edge weights as input.

• Use a topological sorting algorithm to traverse the graph and calculate the longest distances.

• Return an array of integers where each element represents the longest distance from the source node to the corresponding node.

The problem involves finding the size of the largest subtree that is also a Binary Search Tree in a given binary tree.

• Traverse the binary tree in a bottom-up manner to check if each subtree is a BST.

• Keep track of the size of the largest BST subtree encountered so far.

• Use recursion to solve the problem efficiently.

• Consider edge cases like empty tree or single node tree.

• Example: For input 1 2 3 4 -1 5 6 -1 7 -1 -1 -1 -1 -1 -1, the largest BST subtree has size 3.

Implement a priority queue using a heap data structure by completing the provided functions: push(), pop(), getMaxElement(), and isEmpty().

• Understand the operations: push() to insert element, pop() to remove largest element, getMaxElement() to return largest element, and isEmpty() to check if queue is empty.

• Implement a heap data structure to maintain the priority queue.

• Handle different types of queries based on the input provided.

• Ensure correct output for each type 3 query.

• Te...read more

Find the minimum eating speed required for a ninja to consume all chocolates within a given time limit.

• Iterate through possible eating speeds to find the minimum speed that allows the ninja to consume all chocolates within the given time limit.

• Calculate the total number of chocolates to be consumed and divide it by the time limit to get the minimum eating speed.

• Handle cases where a jar has fewer chocolates than the eating speed by consuming all available chocolates from that ...read more

Generate lexicographically largest valid sequence of length 2*N - 1 with specific constraints.

• Start with the largest numbers and place them at the ends to maximize lexicographical order.

• Place the number 1 in the middle to satisfy the condition of appearing exactly once.

• Determine the positions of other numbers based on their distance requirements.

• Iterate through the sequence and fill in the numbers based on the constraints.

• Ensure that each number from 2 to N appears exactly tw...read more

Determine the minimum number of insertions required to empty the board in Zuma game problem.

• Check if it's possible to empty the board by trying all possible combinations of inserting balls from hand.

• Use backtracking algorithm to simulate the game and find the minimum number of insertions required.

• Handle edge cases like when the board cannot be emptied or when the hand is empty.

• Consider optimizing the algorithm by pruning branches that cannot lead to a solution.

• Example: For BO...read more

Virtual functions can be overridden in derived classes, while abstract classes cannot be instantiated directly.

• Virtual functions are declared using the 'virtual' keyword and can be overridden in derived classes.

• Abstract classes cannot be instantiated and may contain one or more pure virtual functions.

• An abstract class can have virtual functions, but a virtual function does not make a class abstract.

• Example: Shape is an abstract class with a pure virtual function 'calculateAre...read more

Design a platform similar to LinkedIn with key features and architecture

• Key Features: user profiles, connections, job postings, messaging, news feed, groups

• Architecture: microservices, cloud storage, scalable database, AI for recommendations

• Security: encryption, secure authentication, data privacy controls

• User Experience: intuitive UI/UX, mobile app support, notifications

• Monetization: premium subscriptions, advertising, job posting fees

Design a system similar to Splitwise and suggest three features for improvement.

• Implement a real-time notification system for updates on shared expenses

• Integrate a feature for automatic currency conversion for international transactions

• Enhance the user interface with data visualization tools for better expense tracking

Asynchronous Apex allows you to run processes in the background, without user interaction. Batch Apex and Queueable Apex are two types of Asynchronous Apex.

• Asynchronous Apex allows you to process large amounts of data asynchronously, without impacting the user interface.

• Batch Apex is used to process large data sets that can be divided into smaller batches for processing.

• Queueable Apex allows you to submit jobs for asynchronous processing, similar to future methods but with mo...read more

Future method is used to run code asynchronously. Callout=true is needed to make HTTP callouts from future methods.

• Future methods are used to run code asynchronously in Salesforce.

• They are annotated with @future annotation.

• Callout=true is needed to make HTTP callouts from future methods.

• Without Callout=true, making HTTP callouts from future methods is not allowed.

HTML5 elements that support media content include <audio>, <video>, and <source>.

• <audio> element for audio content

• <video> element for video content

• <source> element for specifying multiple media resources for <video> and <audio> elements

Platform Events are a feature in Salesforce that allow developers to deliver secure, scalable, and customizable event notifications.

• Platform Events are based on the publish-subscribe model, where publishers send events and subscribers receive them.

• They are used to communicate changes in Salesforce data or custom events within an organization.

• Developers can define custom event objects and trigger events using Apex or declaratively through Process Builder or Flow.

• Subscribers ca...read more

To reduce page loading time, optimize images, minify CSS and JS files, enable browser caching, use a content delivery network (CDN), and reduce server response time.

• Optimize images by reducing file size without compromising quality

• Minify CSS and JS files to reduce their size and improve loading speed

• Enable browser caching to store static resources locally for faster access

• Use a content delivery network (CDN) to distribute content across multiple servers closer to the user

• Redu...read more