NatWest Markets Software Engineer Interview Questions and Answers

Q1. Questions on spring boot
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Q2. Questions on Java
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Q3. Java 8 Stream APi
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Q4. Questions on previous projects
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Q1. Write a program to check numer is palindrom or not.
Ans. 
Program to check if a number is a palindrome or not.
• Convert the number to a string to easily check for palindrome

• Reverse the string and compare it with the original string

• If they are the same, the number is a palindrome
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Q2. What is the functionality of Lambda Expression in Java.
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Lambda expressions in Java are used to provide a concise way to represent anonymous functions.
• Lambda expressions are used to define inline implementation of a functional interface.

• They enable you to pass functionality as an argument to a method.

• Lambda expressions are made up of parameters, an arrow, and a body.

• Example: (a, b) -> a + b
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Q3. How to call default method of interface if class implemented multiple interfaces.
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To call a default method of an interface when a class implements multiple interfaces, use the interface name followed by the method name.
• Use InterfaceName.super.methodName() to call the default method of a specific interface.

• If a class implements multiple interfaces with default methods of the same name, you must specify the interface name to call the desired method.

• Example: Interface1.super.defaultMethod() to call the
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Design an online bidding system

1 hour coding round test on coderpad. 2 questions asked. Questions were of easy and medium level.

Competitive Programming

Q1. Java Basics, and related framework basics in depth
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Q1. Design Patterns and Design Principles
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Design patterns and principles are essential for creating maintainable and scalable software.
• Design patterns are reusable solutions to common software problems.

• Design principles are guidelines for creating software that is easy to maintain and extend.

• Examples of design patterns include Singleton, Factory, and Observer.

• Examples of design principles include SOLID, DRY, and KISS.
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Q1. How you make yourself up to date with latest technologies
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I stay up to date with the latest technologies by attending conferences, reading tech blogs, and participating in online forums.
• Attending conferences and tech events

• Reading tech blogs and articles

• Participating in online forums and communities

• Taking online courses and tutorials

• Experimenting with new technologies in personal projects
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Hacker rank coding round - string and array - medium to hard

Q1. DSA Round with a focus on strings and trees questions
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Q1. UI coding round
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Q2. Quesitons on JS, TS, Angular and React
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Q1. System Design Round
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Q2. HLD and LLD for Zomato (Food Delivery App)
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Q1. Culture Fitment Round
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Q2. General Techno Managerial Questions
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Asked basic questions .... To check concept and logic

Q1. SQL query for------ deleting duplicate from table
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Q2. SQL query for second highest salary
Ans. 
SQL query to find second highest salary
• Use ORDER BY and LIMIT to get the highest salary

• Use subquery to exclude the highest salary and get the second highest
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Q1. Basic information and documents verification
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Q1. Roles and responsibilities and queries solving .
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How would you approach performance issues in an application module

Q1. How would you process millions of records in an excel file
Ans. 
Use programming language to read and process data from Excel file efficiently.
• Use a programming language like Python, Java, or C# to read the Excel file.

• Utilize libraries like pandas in Python or Apache POI in Java for efficient data processing.

• Implement batch processing or parallel processing to handle millions of records efficiently.

• Optimize code for memory management and performance to avoid crashes or slowdowns.

• Con...read more
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