Bandhoo Solutions And Services SDE (Software Development Engineer) Interview Questions and Answers

Q1. Basic Concept of OOPs, Java, Spring Boot, MySQL.
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Q2. Find the kth smallest value in an unsorted array
Ans. 
Find the kth smallest value in an unsorted array
• Sort the array and return the kth element

• Use quickselect algorithm to find the kth smallest element in O(n) time

• Build a min heap of size k and traverse the array to find the kth smallest element
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Q3. Merge Sort Algorithm Implementation
Ans. 
Merge Sort is a divide and conquer algorithm that divides an array into two halves, sorts them and then merges them.
• Divide the array into two halves recursively

• Sort each half recursively using merge sort

• Merge the two sorted halves

• Time complexity is O(nlogn)

• Space complexity is O(n)
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Q1. Detailed discussion on the project I have worked on.
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Q2. What is a Load Balancer?
Ans. 
A Load Balancer distributes incoming network traffic across multiple servers to improve performance and availability.
• It helps to avoid overloading a single server

• It improves responsiveness and availability of applications

• It can be hardware or software-based

• Examples include Amazon ELB, F5 BIG-IP, and NGINX

• It can also perform health checks on servers and route traffic accordingly
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Q3. Difference between Spring MVC and Spring Boot
Ans. 
Spring MVC is a framework for building web applications, while Spring Boot is an opinionated framework for building standalone applications.
• Spring MVC requires more configuration and setup compared to Spring Boot

• Spring Boot provides a pre-configured environment with sensible defaults

• Spring Boot includes an embedded server, making it easier to deploy standalone applications

• Spring MVC is more suitable for building tradit...read more
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Q4. Difference between SQL and NoSQL
Ans. 
SQL is a relational database management system while NoSQL is a non-relational database management system.
• SQL databases are structured and use tables with predefined schema while NoSQL databases are unstructured and use collections or documents.

• SQL databases use SQL (Structured Query Language) for querying and managing data while NoSQL databases use various query languages like MongoDB's query language.

• SQL databases ar...read more
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Q5. Find the equilibrium index where the sum of all the values before the equilibrium index is equal to the sum of all the values after the equilibrium index.
Ans. 
Find the equilibrium index where the sum of all values before it is equal to the sum of all values after it.
• Iterate through the array and calculate the total sum.

• Then iterate again and keep track of the left sum and right sum.

• If they are equal at any index, return that index as the equilibrium index.
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Q1. Explain linked list reversal ways, explain rabbit mq
Ans. 
Explanation of linked list reversal and RabbitMQ
• Linked list reversal can be done iteratively or recursively

• Iterative reversal involves changing the pointers of each node to point to the previous node

• Recursive reversal involves calling the function recursively on the next node and changing its pointer to the current node

• RabbitMQ is a message broker that allows for asynchronous communication between applications

• It uses a...read more
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Q2. Design patterns es saga
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What is your name? WHAT IS YOUR LOCATION?

DSA, DP , BIT MANIPULATION TYPE QUESTIONS

Q1. Design Instagram hld
Ans. 
Design Instagram's high-level architecture.
• Use a microservices architecture to handle different functionalities like user authentication, image storage, and feed generation.

• Use a NoSQL database like MongoDB to store user data and images.

• Use a content delivery network (CDN) to serve images and videos to users quickly.

• Implement a caching layer to improve performance and reduce database load.

• Use a message broker like Rabb...read more
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Q1. Design Instagram, high level system design
Ans. 
Design Instagram, a photo and video sharing social media platform.
• Use a scalable architecture with load balancing and caching.

• Store media files in a distributed file system like Amazon S3.

• Use a relational database for storing user data and metadata.

• Implement a content delivery network (CDN) for faster content delivery.

• Use machine learning algorithms for personalized content recommendations.

• Implement security measures l...read more
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Q2. Graph related questions
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Basic level aptitude questions on quant , verbal , logical thinking . Just manage your time wisely and you are good to go.

3 level of coding questions on your desired language. (Cleared a medium level questions and partially completed a easy level one )

NA

Q1. Questions based on resume
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It was of moderate difficulty level

I was given a comm topic along with 5 other people