Arion Design Interview Questions and Answers

I used PyMongo library to connect to MongoDB and perform CRUD operations in Python

• Installed PyMongo library using pip

• Created a MongoClient object to connect to the MongoDB server

• Accessed the database and collection using the MongoClient object

• Performed CRUD operations using the collection object

• Used pymongo.cursor.Cursor to iterate over the query results

My first step would be to gather more information about the issue from the client.

• Ask the client to provide specific details about the issue such as when it occurred, what actions were taken before the issue occurred, and any error messages received.

• Try to replicate the issue on a test environment to understand the root cause.

• Communicate with the client to keep them updated on the progress and potential solutions.

• Prioritize the issue based on its impact on the client's operat...read more

Count frequency of characters in a word, explain ACID properties, swap 2 numbers without extra variable.

• To count frequency of characters in a word, create a hashmap to store character counts.

• ACID properties in database: Atomicity, Consistency, Isolation, Durability.

• To swap 2 numbers without extra variable, use XOR operation: a = a ^ b, b = a ^ b, a = a ^ b.

• Example: word = 'hello', frequency = {'h': 1, 'e': 1, 'l': 2, 'o': 1}.

Yes, I have experience working with AWS technology.

• I have worked on deploying applications on AWS EC2 instances.

• I have experience setting up and managing AWS S3 buckets for storing data.

• I have used AWS Lambda functions for serverless computing.

• I have configured and managed AWS RDS for database hosting.

Implement a function to find duplicates in an array of strings using Hashmap.

• Create a Hashmap to store the frequency of each string in the array

• Iterate through the array and check if the frequency of any string is greater than 1

• If yes, add it to the list of duplicates

• Return the list of duplicates

Threads are lightweight processes within a program that can run concurrently, allowing for multitasking and improved performance.

• Threads share the same memory space within a process

• Threads can communicate with each other more easily than separate processes

• Examples include a web server handling multiple client requests concurrently

Big data refers to large volumes of structured and unstructured data that is too complex for traditional data processing applications.

• Big data involves processing and analyzing large volumes of data to uncover patterns, trends, and insights.

• It can come from various sources such as social media, sensors, devices, and business transactions.

• Examples of big data technologies include Hadoop, Spark, and NoSQL databases.

• Big data is used in various industries for decision-making, pre...read more

A program to swap two numbers

• Declare two variables and assign values to them

• Use a third variable to store the value of the first variable

• Assign the value of the second variable to the first variable

• Assign the value of the third variable to the second variable