QKS Group Senior Research Analyst Interview Questions and Answers

Medium to Hard 4 DSA questions

Related to codeing
Mathematical question

Round duration - 60 minutes
Round difficulty - Medium

Started with project description, deep dive into project
Questions about ML, Statistics
Coding questions for Python, SQL

Q1. 
Stream of Characters Problem Statement
You are provided with a list, DICTIONARY[], which contains a collection of words, along with a stream of characters (queries). The task is to implement a class Chara...read more
Ans. 
Implement a class to check if a string formed by the last queried characters exists in a dictionary of words.
• Initialize the class with the dictionary of words.

• Implement a method to check if the string formed by the last queried characters exists in the dictionary.

• Use appropriate data structures to efficiently solve the problem.

• Ensure the class handles multiple test cases and character queries.

• Example: DICTIONARY[] = ['...read more
Answered by AI
Add your answer
Q2. How do you retrieve the second highest salary from a SQL database?
Ans. 
Use a subquery to retrieve the second highest salary from a SQL database.
• Use a subquery to select the maximum salary from the table.

• Then use another subquery to select the maximum salary that is less than the maximum salary found in the first step.

• Combine both subqueries to retrieve the second highest salary.
Answered by AI
Add your answer

Round duration - 60 minutes
Round difficulty - Easy

Projects
Machine Learning

Q1. Aptitude Questions
Questions about Statistics
Ans. 
Answering aptitude questions related to statistics
• Statistics is the study of collecting, analyzing, interpreting, presenting, and organizing data.

• Key concepts include mean, median, mode, standard deviation, and probability.

• Examples of statistical questions include 'What is the average income of a population?' and 'What is the likelihood of an event occurring?'
Answered by AI
Add your answer

Round duration - 60 minutes
Round difficulty - Easy

Behavioral Round
Questions asked about Amazon Leadership Principles

Round duration - 60 minutes
Round difficulty - Easy

Medium Python questions
Medium SQL questions

Q1. Ninja and Mathematics
Ninja is a genius in mathematics. He got an interview call from MIT. During the interview, the professor asked Ninja a challenging question.
Given two integers 'N1' and 'N...read more
Ans. 
Calculate the fraction when one integer is divided by another, with repeating decimal parts enclosed in parentheses.
• Divide the first integer by the second integer to get the fraction

• Identify if the fractional part is repeating and enclose it in parentheses

• Return the fraction for each test case
Answered by AI
Add your answer
Q2. How can you find the top 2 salaries for each department in SQL?
Ans. 
Use SQL query with window functions to find top 2 salaries for each department.
• Use PARTITION BY clause to partition the data by department.

• Use ORDER BY clause to order the salaries in descending order.

• Use ROW_NUMBER() function to assign a rank to each row within the partition.

• Filter the results to only include rows with rank 1 and 2.
Answered by AI
View 1 more answer

Q1. What is Forgerock IDM
Ans. 
ForgeRock IDM is an identity management software that provides secure access to applications and services.
• ForgeRock IDM allows organizations to manage user identities and access privileges across multiple systems and applications.

• It provides a centralized platform for managing user authentication, authorization, and provisioning.

• ForgeRock IDM supports various authentication protocols such as OAuth, SAML, and OpenID Con...read more
Answered by AI
Add your answer
Q2. How user on boarding is done
Ans. 
User onboarding is the process of introducing new users to a product or service and helping them get started.
• Provide clear instructions and guidance on how to use the product or service

• Offer tutorials or walkthroughs to help users understand the features and functionality

• Simplify the registration process and make it easy for users to create an account

• Provide support and assistance to users who encounter issues or have ...read more
Answered by AI
Add your answer