Quantiphi interview questions
Online test → Group discussion → Technical → HR·100% entry level
CS fundamentals
Showing 34 of 73 reported in this area
Write SQL queries involving joins
What is Socket.IO and where is it used?
Predict the output of OOPs-based programs
Explain the event loop in Node.js using a diagram
Create a server and write a basic API using Node.js
Explain String immutability in Java and related concepts
Write or analyze SQL queries involving joins and DML operations
Write an SQL query to fetch the Nth highest salary from a table.
What is thread synchronization and how can deadlocks be overcome?
Answer questions on DBMS concepts and write or explain SQL queries
Predict the output of Python code snippets involving array slicing
Explain DBMS fundamentals and answer basic database theory questions
Create a button that changes the background color of a table on click
Explain the MVC architecture and how it is implemented in Spring Boot.
What is the difference between an interface and an abstract class in Java?
Explain Java Collections framework and differences between List, Set, and Map
Predict the output of Python code snippets involving global and local variables
What is polymorphism? Explain compile-time and run-time polymorphism with sample code.
Explain React hooks like useState, useEffect, and useRef, and their practical use cases.
Given JavaScript code with console.log and setTimeout, predict the execution order and output
Explain the order of constructor and destructor calls in multilevel inheritance with sample code.
Explain multiple inheritance. Is multiple inheritance supported in Java? How can it be implemented alternatively?
Compare relational and non-relational databases. Explain horizontal vs vertical scaling and sharding with use cases.
Explain inheritance with examples. Explain private, protected, and public access specifiers and their behavior in inheritance.
Explain different types of SQL joins and perform left outer join, right outer join, and full outer join on given tables with NULL values.
Write an SQL query using joins
Explain ACID properties in DBMS.
Explain ACID properties in databases
Explain runtime polymorphism in Java.
What is an event listener in JavaScript?
What is hashing and when should it be used?
What new features were introduced in Java 8?
What does chmod 777 mean in a Linux terminal?
What are the different types of Machine Learning?
DSA
Showing 14 of 35 reported in this area
Two medium-level coding problems (DSA)
Three medium-level DSA problems
Implement a hash table using your own hash function.
Write a program to find the Nth prime number and optimize it.
Find the nth Magic Number (sequence example: 5, 25, 30, 125, 130, ...).
Given an unsorted array, find all pairs whose sum is equal to a given value k.
Given queries on a 2D matrix, perform search and update operations efficiently.
Given barcode data, identify the defective barcode and write a Python program to detect it.
Given a weighted directed graph, find the shortest distance from a source node to all other nodes.
Given an array of non-negative integers, find the maximum sum you can obtain such that no two chosen elements are adjacent.
Given an array of piles of bananas and an integer h, find the minimum eating speed such that all bananas are eaten within h hours.
Convert a given number into a Base-62 encoded string where 0–9 map to digits, 10–35 map to uppercase letters A–Z, and 36–61 map to lowercase letters a–z.
Find the second largest element in an array
Explain the Bubble Sort algorithm and implement it
Behavioural
Showing 5 of 13 reported in this area
What kind of product would you build and why?
Discuss the strategy to make the hospitality and tourism industry work together for the ease of the customer.
How would you handle a situation where a client is behaving aggressively and is dissatisfied with a previously delivered solution?
What are the benefits of working in a team?
Discuss the role of social media during COVID-19.
Aptitude
Showing 4 of 11 reported in this area
How would you increase the revenue of a restaurant?
Answer aptitude questions involving quantitative and logical reasoning
How would you select a player for a cricket team given performance and other relevant factors?
Given average sugar consumption data for all Indian states except Gujarat, estimate or analyze the sugar consumption for Gujarat.
Puzzles
2 questions reported in this area
Why are manhole covers circular rather than square or rectangular?
There are three boxes: one contains apples, one contains oranges, and one contains both. All are incorrectly labeled. You can open one box and take out one fruit. How do you determine the contents of all boxes?
System design
1 questions reported in this area
Given a real-world scenario where a machine learning model needs to be deployed in a production environment, outline the steps you would take to ensure smooth deployment and ongoing management.
Showing 60 of 106 questions. Ranked by how often the same question came back across reports.
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What questions does Quantiphi ask?
Candidate interview reports most often cover CS fundamentals (54%) and DSA (26%).
How many rounds does Quantiphi interview have?
Candidate interview reports show an average of 3.6 rounds per experience, with a typical sequence of Online test → Group discussion → Technical → HR. Individual interview paths can vary.
Is the Quantiphi interview hard?
Among questions with a reported difficulty, the mix is easy 52%, medium 47%, hard 1%.