Bank of America Interview Questions, Process, and Tips

Q1. JavaScript basic ques
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Q2. Var vs const vs let
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Coding interview basic level nothing more required for this

Basic coding not more relevant in the whole process

Q1. Okish not that hard
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Trapping rain water and median of two sorted array

Q1. Oops and dbms questions?
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Q2. Code question in Array and string?
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Q1. Tell me about yourself
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Q1. Concepts of class, polymorphism, what are decorators, concepts of inheritance.
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Q2. Difference between bagging and boosting
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Bagging and boosting are ensemble learning techniques used in machine learning to improve the performance of models by combining multiple weak learners.
• Bagging (Bootstrap Aggregating) involves training multiple models independently on different subsets of the training data and then combining their predictions through averaging or voting.

• Boosting involves training multiple models sequentially, where each subsequent mode...read more
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Q3. Python coding question to find the employee with second largest income
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Python code to find the employee with second largest income in a list of employees
• Sort the list of employees by income in descending order

• Return the employee at index 1 in the sorted list
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Q4. Detect the unique characters in the substring and their length
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The candidate needs to identify unique characters in a given substring and calculate their length.
• Iterate through the substring and store each character in a set to keep track of unique characters

• Calculate the length of the set to determine the number of unique characters

• Return the set of unique characters and their length as an array of strings
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Q5. Concepts of mutable and immutable in python.
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In Python, mutable objects can be changed after creation, while immutable objects cannot be changed.
• Mutable objects: lists, dictionaries, sets

• Immutable objects: strings, tuples, numbers

• Example: x = [1, 2, 3] (mutable), y = 'hello' (immutable)
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Array linkedlist and also value assesment also included

Q1. Oops questions abstraction inheritrance
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Q2. Dbms joins left join right join
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Q1. They asked Hr questions , like how do you suit for this role, how your skills are beneficial for the role
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Q2. And then asked to code two DSA questions followed by it they asked to explain the logic of the code which you have written
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Q1. Difference between Entity Framework and ADO.Net
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Entity Framework is an ORM that simplifies data access in .NET applications, while ADO.Net is a low-level data access technology.
• Entity Framework is an Object-Relational Mapping (ORM) framework that allows developers to work with databases using .NET objects.

• ADO.Net is a set of classes that allows developers to interact with data sources like databases directly using SQL commands.

• Entity Framework provides higher level ...read more
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Q2. Explain Angular hooks or lifecycle
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Angular hooks or lifecycle are methods that allow developers to tap into key moments in a component's lifecycle.
• Angular components have several lifecycle hooks such as ngOnInit, ngOnChanges, ngDoCheck, ngOnDestroy, etc.

• These hooks allow developers to perform actions at specific points in a component's lifecycle, such as initialization, change detection, and destruction.

• For example, ngOnInit is used to initialize data i...read more
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Q3. Difference between function and stored procedure in SQL
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Functions return a single value while stored procedures can perform multiple operations and return multiple values.
• Functions return a single value while stored procedures can return multiple values.

• Functions are used for computations and return values, while stored procedures are used for executing a sequence of statements.

• Functions can be called from within SQL statements, while stored procedures are called using the ...read more
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Q4. Your professional experience
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I have over 8 years of experience as a Senior .NET Developer, working on various projects and technologies.
• Developed web applications using ASP.NET MVC and Web API

• Worked with SQL Server for database design and development

• Implemented front-end using JavaScript frameworks like Angular and React

• Experience with cloud platforms like Azure for deployment and hosting
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Q5. Projects architecture you have worked on?
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I have worked on projects with layered architecture, microservices, and monolithic architecture.
• Layered architecture: Separation of concerns into presentation, business logic, and data access layers.

• Microservices: Independent, loosely coupled services communicating over APIs.

• Monolithic architecture: Single-tiered application with all components tightly integrated.

• Example: Developed a web application using ASP.NET MVC w...read more
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