NatWest Markets Senior Test Designer Interview Questions and Answers

Hackathon Test with 2 medium level coding question.

Technical Video Interview- Java concepts mostly related to Java 8, 1 coding program and some db questions were asked.

Q1. Questions related to System Design.
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Q1. Questions related to my projects . Some questions related to my current role and responsibilities.
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Q1. Basic java questions and 2 DSA medium level problems
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Q2. Two sum leet code problem
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Q1. Design round. Design a system that send notification’s to all the passengers of trains just when the train arrives at the station next to it. And one question on tree LCA
Ans. 
Design a system to send notifications to train passengers when the train arrives at the next station.
• Use GPS tracking to determine train location in real-time

• Implement a notification system that sends alerts to passengers' devices

• Integrate with train schedule data to know when the train is approaching the next station
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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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Medium leetcode problem on array and linked list. And some theoretical questions

Q1. Core java , collections, object oriented principles . Some small coding questions based on usage of overriding and overloading
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Q1. Multi treading and 1 problem solving question.
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Q1. Discussion with ED : expectations and managerial questions
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Q1. Typical HR questions
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Q1. Array related problem
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Q1. C# oops related deep question
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Q1. Project Design related questions
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Q1. SQL Linq mvc net core related questions
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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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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.
Ans. 
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.
Ans. 
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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Q1. How do you Structure Database? Make Design ?
Ans. 
A well-structured database design is crucial for efficient data management.
• Identify entities and their relationships

• Normalize data to reduce redundancy

• Choose appropriate data types and constraints

• Consider performance and scalability

• Document the design and update as needed
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Q2. Ask about Low Level Design?
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