Quantiphi Analytics Solutions Private Limited Sdet Lead Interview Questions and Answers

It is very easy round

One easy and one medium

Q1. Four pillers of oops
Ans. 
Encapsulation, Inheritance, Polymorphism, Abstraction
• Encapsulation: Bundling data and methods that operate on the data into a single unit. Example: Class in Java

• Inheritance: Ability of a class to inherit properties and behavior from another class. Example: Subclass extending a superclass

• Polymorphism: Ability to present the same interface for different data types. Example: Method overloading in Java

• Abstraction: Hiding t...read more
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Q2. What is sql and database
Ans. 
SQL is a programming language used to manage and manipulate data in relational databases.
• SQL stands for Structured Query Language

• It is used to communicate with databases to perform tasks like querying, updating, and deleting data

• Common SQL commands include SELECT, INSERT, UPDATE, DELETE

• Examples of popular databases that use SQL include MySQL, PostgreSQL, Oracle
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Q1. Find the missing number in a permutation array
Ans. 
Find the missing number in a permutation array
• Iterate through the array and calculate the sum of all numbers

• Calculate the sum of all numbers from 1 to n (where n is the length of the array)

• Subtract the sum of the array from the sum of all numbers to find the missing number
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Q2. Find if there is a loop in linked list
Ans. 
To find a loop in a linked list, use Floyd's Cycle Detection Algorithm.
• Use two pointers - slow and fast, where slow moves one step at a time and fast moves two steps at a time.

• If there is a loop, the two pointers will eventually meet at some point within the loop.

• To find the starting point of the loop, reset one pointer to the head and move both pointers one step at a time until they meet again.
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Leetcode medium level questions, sql query, puzzle, test writing for api

Q1. Simple xpath without using Index reverse strings with words separately
Ans. 
Reverse strings with words separately using simple xpath without using index
• Use XPath function to split the string into words

• Reverse each word individually using XPath function

• Concatenate the reversed words back together
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Q1. Django in depth questions
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Q2. Django ORM related questions
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2 coding questions, and other quantitative, logical and verbal

A group of 7 and topic was "local for vocal"

Verbal,quants

Q1. Sql, oops data structure
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Recerse string using java

Q1. Tell me all oops features
Ans. 
Object-oriented programming features include encapsulation, inheritance, polymorphism, and abstraction.
• Encapsulation: Bundling data and methods that operate on the data into a single unit (class).

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

• Polymorphism: Ability for objects of different classes to respond to the same message in different ways.

• Abstraction: Hiding the complex imp...read more
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