Sanda Group Software Developer Interview Questions and Answers

They asked easy to medium DSA . It includes arrays, strings, recursion.

Q1. React hooks, Explain using code
Ans. 
React hooks are functions that let you use state and other React features without writing a class.
• Hooks are functions that let you use state and other React features in functional components

• useState() is a hook that allows you to add state to functional components

• useEffect() is a hook that allows you to perform side effects in functional components

• useContext() is a hook that allows you to use the context API in functio
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Q2. Factory Patterns?
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Q3. Liskov Substitution Principle
Ans. 
Liskov Substitution Principle states that objects of a superclass should be replaceable with objects of its subclasses without affecting the program's correctness.
• Subtypes must be substitutable for their base types.

• Derived classes must be able to replace their base classes without affecting the program's behavior.

• Violating this principle can lead to unexpected behavior and errors in the code.

• Example: If a program expec...read more
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Q4. Oops Concept and give examples
Ans. 
Oops concept is a programming paradigm that focuses on objects and classes.
• Oops stands for Object-Oriented Programming

• Key concepts include inheritance, encapsulation, polymorphism, and abstraction

• Examples: Class Car with properties like make, model, and methods like start(), stop()

• Example: Inheritance - Class SUV extends Car and adds property numSeats
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Q5. JQuery - Ajax mechanisms
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Q6. Docker and Kubernetes - Azure concepts
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Q1. What is oops, what is abstraction
Ans. 
OOPs stands for Object-Oriented Programming. Abstraction is the concept of hiding complex implementation details and showing only necessary features of an object.
• OOPs is a programming paradigm that uses objects and classes to design and develop applications.

• Abstraction is the process of hiding the implementation details and showing only the necessary features of an object.

• For example, a car can be represented as an obj...read more
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Two Easy questions to be solved

Q1. Some Technical based questions
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Q2. It was amazing . Interviewer asked me to code for heap sort and asked me to explain.
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Q3. Write a code for heap sort algorithm and explain it?
Ans. 
Heap sort is a comparison-based sorting algorithm that uses a binary heap data structure.
• Heap sort works by building a binary heap from the array and then repeatedly extracting the maximum element and placing it at the end of the array.

• The heap is maintained as a complete binary tree, where each parent node is greater than or equal to its children.

• The time complexity of heap sort is O(n log n) and it is an in-place sor...read more
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Q1. Difference b/w full and partial selectors
Ans. 
Full selectors select all descendants of a specified element, while partial selectors select only direct children.
• Full selectors use a space between the parent and child elements, while partial selectors use the > symbol.

• Full selectors are more general and can target multiple levels of descendants, while partial selectors are more specific and target only direct children.

• Example of full selector: div p selects all

  ele...read more
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Q2. What is Screen scraping and data scraping
Ans. 
Screen scraping is extracting data from a website's HTML code, while data scraping is extracting data from various sources.
• Screen scraping involves extracting data from the visual representation of a website, usually using automation tools like web scrapers.

• Data scraping involves extracting data from various sources such as databases, APIs, and documents.

• Both screen scraping and data scraping are used to collect and an...read more
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Aptitude related questions asked in form of mcq.

Coding questions are given

Q1. Asked about sql queries
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Q2. Asked about oops concept
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Q1. Asked about projects
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Q2. Asked about goals
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Round duration - 60 minutes
Round difficulty - Medium

30 Aptitude problems and two coding questions

Q1. 
Count Inversions Problem Statement
Given an integer array ARR of size N, your task is to find the total number of inversions that exist in the array.
An inversion is defined for a pair of integers in the...read more
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Q2. 
Maximum Subarray Sum Problem Statement
Given an array of integers, determine the maximum possible sum of any contiguous subarray within the array.
Example:
Input:
array = [34, -50, 42, 14, -5, 86]
Out...read more
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Round duration - 90 minutes
Round difficulty - Medium

Data structure and algorithms plus object oriented problems

Q1. 
Merge Sort Problem Statement
You are given a sequence of numbers, ARR. Your task is to return a sorted sequence of ARR in non-descending order using the Merge Sort algorithm.
Explanation:
The Merge Sort...read more
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Q2. 
Problem Statement: Delete Node In A Linked List
Given a singly linked list of integers and a reference to a node, your task is to delete that specific node from the linked list. Each node in the linked li...read more
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Round duration - 60 miinutes
Round difficulty - Easy

Database questions and discussion about projects

Q1. What is a normal form in database management systems, and can you explain Boyce-Codd Normal Form (BCNF)?
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Q2. What is the difference between the 'WHILE' keyword and the 'HAVING' keyword in SQL?
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