Quantiphi Analytics Solutions Private Limited Software Developer Interview Questions, Process, and Tips

Q1. REST API for User CRUD
Ans. 
Design a RESTful API for CRUD operations on user resources.
• Use HTTP methods like GET, POST, PUT, DELETE for CRUD operations

• Create endpoints like /users for listing all users, /users/{id} for specific user

• Use status codes like 200 for success, 404 for not found, 400 for bad request

• Implement authentication and authorization mechanisms for security

• Include request and response body formats like JSON or XML
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Q2. Two Sum Leetcode problem
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Q3. Basic questions based on the candidate technical skills
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Q1. Basics to Intermediate level of questions based on the skills mentioned in the resume
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Q2. Projects related discussions
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Q1. I was informed to upload the supporting documents. ( They rejected me after this eventhough all my documents are genuine )
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There were easy to medium dsa questions

Q1. Oops concept, explain each of them
Ans. 
Object-oriented programming concepts that help in organizing and structuring code.
• Encapsulation: Bundling data and methods that operate on the data into a single unit (class).

• Inheritance: Allowing a class to inherit properties and behavior from another class.

• Polymorphism: Ability to present the same interface for different data types.

• Abstraction: Hiding the complex implementation details and showing only the necessary
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Q2. Multithreading questions
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Was tough but can be cracked in one go

Easy to moderate need to study dsa

Q1. Self introduction
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Q2. Tell me about your projects
Ans. 
I have worked on various projects including a web application for a healthcare company and a mobile app for a retail business.
• Developed a web application for a healthcare company to manage patient records and appointments

• Created a mobile app for a retail business to enhance customer shopping experience

• Implemented features such as user authentication, data visualization, and real-time updates

• Utilized technologies like R
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78 mcq questions and 2 dsa

Coding based round on dsa

General apti questions and coding

Q1. Sql , rdbms, projects
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Q1. Hr Questions and projects discussion
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Round duration - 90 Minutes
Round difficulty - Medium

Q1. SQL Questions
Second highest salary
Different join and order by conditions
Ans. 
Find the second highest salary using SQL.
• Use the SELECT statement to retrieve the salary column from the table.

• Order the results in descending order using the ORDER BY clause.

• Use the LIMIT clause to limit the result to the second row.

• Combine the above steps in a single SQL query.
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Q2. Fruits and Baskets
There are ‘n’ fruit trees that are planted along a road. The trees are numbered from 0 to n-1. The type of fruit each tree bears is represented by an uppercase character of the English a...read more
Ans. 
The problem is to find the maximum number of fruits the Ninja can put in both baskets after satisfying given conditions.
• The Ninja can start at any tree and end at any tree, but cannot skip a tree.

• He can pick one fruit from each tree until he cannot, i.e., when he has to pick a fruit of the third type.

• The restriction is that each basket can have only one type of fruit.

• We need to find the maximum number of fruits that ca
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Round duration - 30 Minutes
Round difficulty - Medium

Was Shortlisted For this round with in total of 22 students, 7 in my profile.
It was Technical round with 30 mins of time allotted.
The interviewer was friendly, started with basic questions about me followed by project specific and then a puzzle.

Q1. Technical Questions
Two trains A and B travelling at speed X and Y respectively. Now imagine when distance between them is D a bee that can fly at speed Z begins to fly from A to B and then B to A until bot...read more
Ans. 
The distance traveled by the bee can be calculated using the formula: distance = (X + Y) * (D / (X + Y + Z))
• The bee starts flying from train A to train B and then back to train A until they collide

• The total distance traveled by the bee can be calculated using the formula: distance = (X + Y) * (D / (X + Y + Z))

• X and Y are the speeds of trains A and B respectively, and Z is the speed of the bee

• D is the initial distance b
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Q2. Sort 0 1 2
You have been given an integer array/list(ARR) of size 'N'. It only contains 0s, 1s and 2s. Write a solution to sort this array/list.
Note :
Try to solve the problem in 'Single Sca...read more
Ans. 
The problem requires sorting an array of 0s, 1s, and 2s in a single scan.
• Use three pointers to keep track of the positions of 0s, 1s, and 2s.

• Initialize the low pointer at the beginning of the array and the high pointer at the end.

• Iterate through the array using a current pointer and swap elements based on their values.

• Move the pointers accordingly until the array is sorted.

• The time complexity of this solution is O(N) a
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Round duration - 20 Minutes
Round difficulty - Hard

The interview was scheduled for 15 mins and 12 students were shortlisted for this round. 5 in my profile.
The interviewer didn't on his video whereas mine was, the interviewer was friendly and maintained a poker voice.
Asked Basic HR questions but crossed questioned several times.

Q1. Basic HR Questions
What qualities a student must learn when transitioning from a Student to a cooperate employee?
Apart from technical learning what have you learnt from college experience?
Ans. 
Qualities a student must learn when transitioning to a corporate employee
• Professionalism and work ethic

• Time management and prioritization

• Effective communication and teamwork

• Adaptability and flexibility

• Problem-solving and critical thinking

• Leadership and initiative

• Emotional intelligence and interpersonal skills
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