40+ Bank of America Interview Questions and Answers

Detect cycle in an undirected graph by checking for a path that begins and ends at the same vertex.

• Use Depth First Search (DFS) to traverse the graph and detect cycles.

• Maintain a visited set to keep track of visited vertices and a parent pointer to avoid visiting the same vertex twice.

• If a visited vertex is encountered that is not the parent of the current vertex, a cycle is detected.

• Return 'Yes' if a cycle is found, 'No' otherwise.

Reschedule at most K presentations to maximize longest gap without overlap.

• Iterate through presentations and calculate the gap between each pair of presentations

• Sort the presentations by their start times and keep track of the longest gap

• Reschedule at most K presentations to maximize the longest gap without overlap

Implement three stacks using a single array and handle insertion and deletion operations efficiently.

• Create an array to store elements for all three stacks and keep track of their respective top indices.

• For each query, check the type of operation (push or pop) and perform the necessary action.

• Handle cases where a pop operation is attempted on an empty stack by returning -1.

• Ensure the array size does not exceed the total number of queries.

• Example: For input '0 1 5', pop the to...read more

The Lowest Common Ancestor (LCA) problem involves finding the lowest node in a tree that is an ancestor of two given nodes.

• LCA is the lowest node in a tree that is an ancestor of both given nodes.

• The tree is rooted at node 1 for each test case.

• Paths from each node to the root are considered to find the LCA.

• Constraints include the number of test cases, nodes, queries, and node values.

• Time limit for the solution is 1 second.

The problem involves finding the number of distinct ways to climb to the N-th stair by taking either one or two steps at a time.

• Use dynamic programming to solve this problem efficiently.

• Define a recursive function to calculate the number of ways to reach each stair.

• Consider base cases for 0 and 1 stairs.

• Use memoization to store and reuse intermediate results to avoid redundant calculations.

• Return the result modulo 10^9+7 to handle large outputs.

Remove duplicate occurrences of characters in a given string.

• Use a hash set to keep track of characters seen so far.

• Iterate through the string and add non-duplicate characters to a new string.

• Return the new string as the result.

Compiled languages are translated directly into machine code before execution, while interpreted languages are translated line by line during execution.

• Compiled languages are generally faster in execution as the entire code is translated before running (e.g. C, C++)

• Interpreted languages are easier to debug and more flexible as they can be executed directly without needing a separate compilation step (e.g. Python, JavaScript)

• Compiled languages produce standalone executable fil...read more

I have used several development tools in my previous roles.

• I have experience with IDEs such as Eclipse and Visual Studio

• I have worked with version control systems like Git and SVN

• I have used project management tools like JIRA and Trello

• I have experience with testing frameworks like Selenium and JUnit

• I have also worked with build tools like Maven and Gradle

I am comfortable working with Windows, macOS, and Linux operating systems.

• Proficient in Windows OS and its various versions

• Familiar with macOS and its features

• Comfortable working with Linux distributions such as Ubuntu and CentOS

• Experience with virtualization software like VMware and VirtualBox

• Knowledge of mobile operating systems like Android and iOS

Check debug logs for Apex error messages

• Review debug logs to identify any Apex error messages

• Check the error message for the line number and class name

• Use the Developer Console to view the debug logs

• Consider implementing error handling and notifications for Apex errors

Salesforce profile has 3 types of notifications. A work-around to avoid bombardment is to customize notification settings.

• Salesforce profile has 3 types of notifications: In-App, Email, and Chatter

• To avoid bombardment, customize notification settings based on user preferences

• For example, users can choose to receive notifications only for important events or from specific groups

• Another work-around is to use automation tools like Process Builder to limit the number of notificat...read more

To cut a circular cake into 8 pieces using 3 cuts, make two perpendicular cuts through the center of the cake and then make a horizontal cut through the center.

• Make a vertical cut through the center of the cake, dividing it into two equal halves.

• Make a horizontal cut through the center of the cake, dividing it into four equal quarters.

• Make a vertical cut perpendicular to the first cut, dividing the cake into 8 equal pieces.

I prefer to do testing by creating test cases based on the business requirements and executing them systematically.

• Create test cases based on business requirements

• Execute test cases systematically

• Use automation tools for repetitive tests

• Perform regression testing after changes

• Collaborate with stakeholders for feedback

Workflow, Process Builder, and Flows are automation tools in Salesforce, but differ in their capabilities and use cases.

• Workflow is a simple automation tool that allows you to automate standard internal procedures and processes to save time and ensure consistency.

• Process Builder is a more advanced automation tool that allows you to create complex, multi-step processes with advanced logic and branching.

• Flows are similar to Process Builder, but are designed to be more user-frie...read more

Handling uncertainty is the most difficult thing to handle.

• Uncertainty in project timelines, budgets, and resources

• Managing stakeholder expectations

• Dealing with unexpected roadblocks and obstacles

• Adapting to changes in project scope

• Maintaining team morale and motivation

• Balancing competing priorities

Interpreted languages are executed directly by the interpreter while compiled languages are first converted to machine code.

• Interpreted languages are slower than compiled languages as they are executed line by line.

• Compiled languages are faster as the code is already converted to machine code.

• Interpreted languages are easier to debug as errors can be caught at runtime.

• Compiled languages are harder to debug as errors can only be caught during compilation.

• Examples of interprete...read more

Cvent is a specific event management software platform, while general events refer to any type of event.

• General events can refer to any type of event such as weddings, conferences, or parties.

• Cvent is a specific event management software platform used for planning and managing events.

• Cvent offers features like online registration, venue sourcing, and attendee management.

• General events can be organized without the use of any specific event management software.

To build a tinyurl-like service, design a system with a URL shortening algorithm, a database to store mappings, and a redirect service.

• Use a hashing algorithm to generate short URLs from long URLs (e.g. MD5, SHA-256).

• Store the mappings of short URLs to long URLs in a database (e.g. MySQL, Redis).

• Implement a redirect service that takes a short URL, looks up the corresponding long URL in the database, and redirects the user.

• Consider implementing features like custom short URLs,...read more

Profiles define a user's access to objects and fields, while permission sets grant additional permissions to users.

• Profiles are assigned to users and define their access to objects and fields.

• Permission sets are used to grant additional permissions to users beyond their profile.

• Profiles are used to control access to standard objects, while permission sets are used for custom objects.

• Multiple permission sets can be assigned to a user, but only one profile can be assigned.

• Profi...read more

Creating a project from scratch involves defining goals, assembling a team, creating a plan, and executing it.

• Define project goals and objectives

• Assemble a team with the necessary skills and expertise

• Create a project plan with timelines and milestones

• Execute the plan, monitor progress, and make adjustments as needed

I am highly experienced in fast paced environments, having successfully led product teams in dynamic and rapidly changing industries.

• Led product teams in fast-paced tech startups, delivering products on tight deadlines

• Adapted quickly to changing market conditions and customer needs

• Implemented agile methodologies to streamline product development processes

Sequence of execution in Salesforce determines the order in which various operations are executed.

• Triggers

• Validation rules

• Before triggers

• Custom validation

• After triggers

• Assignment rules

• Auto-response rules

• Workflow rules

• Escalation rules

• Processes

• Post-commit logic

Streams in Java8 offer concise and readable code for processing collections compared to traditional for loops.

• Streams provide functional-style operations like map, filter, and reduce for easy data processing.

• Streams allow for parallel processing of data, potentially improving performance.

• Streams promote immutability and encourage writing more declarative code.

• Streams reduce boilerplate code and make the code more readable and maintainable.

• Example: Using streams to filter a li...read more

I am very skilled at multitasking and have successfully managed multiple projects simultaneously in my previous roles.

• I have experience juggling multiple tasks and priorities in a fast-paced work environment

• I am able to prioritize effectively and stay organized to ensure all tasks are completed on time

• I have successfully managed multiple research projects simultaneously, meeting deadlines and producing high-quality work

Implement 3 stacks using 1 array

• Divide the array into 3 equal parts

• Use pointers to keep track of top of each stack

• Push and pop elements based on the pointer of the respective stack

Search for a string efficiently in a character matrix.

• Use depth-first search (DFS) or breadth-first search (BFS) to traverse the matrix and search for the string.

• Optimize by pruning search paths if a mismatch is encountered.

• Consider using a Trie data structure for faster string matching.

• Handle edge cases like empty matrix or string, out of bounds indices, etc.

I am skilled in building and maintaining relationships with stakeholders through effective communication and collaboration.

• I have experience in regularly communicating with stakeholders to provide updates on financial performance and address any concerns.

• I prioritize understanding the needs and expectations of stakeholders to ensure their satisfaction and alignment with organizational goals.

• I have successfully managed stakeholder relationships by being responsive, proactive, ...read more

Design a ticket booking system like BookMyShow

• Use a database to store movie details, show timings, and seat availability

• Implement user authentication and authorization for booking tickets

• Include a payment gateway for secure transactions

• Design a user-friendly interface for browsing and booking tickets

• Allow users to rate and review movies after watching them

Premiere Pro is a video editing software used to create and edit videos like a pro.

• Premiere Pro is like a digital playground where you can cut, trim, and add cool effects to your videos.

• You can also add music, text, and transitions to make your videos look professional.

• It's like having a magic wand to make your videos look awesome and share them with others.

• You can even make your own movies or YouTube videos using Premiere Pro.

A user story is a short, simple description of a feature told from the perspective of the end user.

• Describes what a user wants to accomplish with a product

• Written in a simple, non-technical language

• Used in Agile software development to define requirements

• Follows the format: As a [user], I want [goal], so that [reason]

Ways to share records in Salesforce

• Sharing rules

• Manual sharing

• Role hierarchy

• Public groups

• Team sharing

• Apex sharing

To find a number from a singly linked list.

• Traverse the linked list and compare each node's value with the target number.

• If the target number is found, return the node.

• If the end of the linked list is reached without finding the target number, return null.

Joins are used to combine data from multiple tables. Pivot tables summarize data. Functions perform calculations or manipulate data.

• Types of joins include inner join, left join, right join, and full outer join.

• Pivot tables allow you to summarize and analyze large amounts of data in a table format.

• Functions can perform calculations such as sum, average, and count, or manipulate data such as text functions.

• Examples of functions include SUM, AVERAGE, COUNT, CONCATENATE, and LEFT...read more

Cvent is a cloud-based software company that provides event management and online registration solutions.

• Cvent offers tools for event planning, marketing, and attendee engagement.

• The platform allows users to create event websites, manage registrations, and track attendee data.

• Cvent also offers features for virtual events and hybrid events.

• The company was founded in 1999 and is headquartered in Tysons, Virginia.

Key strengths include leadership, communication, problem-solving, and team building.

• Strong leadership skills demonstrated through successful team management

• Effective communication abilities to ensure clear direction and collaboration

• Proven problem-solving skills to address challenges and drive results

• Experienced in building and motivating high-performing teams

Water trapping problem involves calculating the amount of water that can be trapped between walls or blocks.

• Calculate the maximum height of water that can be trapped at each index

• Use two pointers approach to iterate through the array and calculate trapped water

• Consider the minimum of left max height and right max height at each index to calculate trapped water

Detect cycle in a graph

• Use Depth First Search (DFS) algorithm to traverse the graph

• Maintain a visited set to keep track of visited nodes

• If a node is visited again during DFS, then a cycle exists

• If all nodes are visited and no cycle is found, then no cycle exists

Currently overseeing a team of engineers working on developing a new software application for data analysis.

• Leading daily stand-up meetings to track progress and address any roadblocks

• Providing technical guidance and support to team members

• Reviewing code and providing feedback for improvements

• Collaborating with product managers to ensure project goals are met

Handling all problems requires a systematic approach and effective communication.

• Identify the problem and its root cause

• Develop a plan of action

• Communicate with stakeholders

• Implement the plan

• Evaluate the outcome and make necessary adjustments

Pivot tables in Excel are used to summarize and analyze large amounts of data.

• Pivot tables allow you to reorganize and summarize selected columns and rows of data in a spreadsheet.

• They can help you quickly analyze trends and patterns in data.

• You can easily create pivot tables by selecting your data and clicking on the 'PivotTable' option in Excel.

• You can then drag and drop fields to analyze data in different ways, such as summing up values or counting occurrences.

Indian Railways is a state-owned national railway system in India, operating one of the largest and busiest rail networks in the world.

• Indian Railways is managed by the Ministry of Railways, Government of India.

• It is responsible for rail transport in India, covering over 67,000 km of track and carrying millions of passengers daily.

• Indian Railways operates both long-distance and suburban rail systems, connecting various parts of the country.

• It is known for its extensive networ...read more

To solve a problem, it is important to first identify the root cause and then come up with a plan of action to address it.

• Identify the problem by gathering information and analyzing the situation

• Break down the problem into smaller components to better understand it

• Brainstorm possible solutions and evaluate their feasibility

• Implement the chosen solution and monitor its effectiveness

• Adjust the solution as needed based on feedback and results

A smart wearable device that uses haptic feedback to help blind individuals navigate their surroundings.

• Utilize sensors to detect obstacles and provide feedback through vibrations

• Include GPS functionality for navigation assistance

• Integrate voice recognition for hands-free operation

• Design a user-friendly interface for easy customization

Discuss the impact of artificial intelligence on product development.

• AI can streamline product development processes by analyzing data and predicting trends.

• AI can personalize products based on customer preferences and behavior.

• AI can improve product quality through automated testing and optimization.

• AI can enable the development of innovative products by generating new ideas and designs.

• AI can enhance customer support by providing personalized recommendations and assistance.