10+ Delta Air Lines Interview Questions and Answers

AWS Lambda is a serverless computing service that runs code in response to events and automatically manages the computing resources required.

• AWS Lambda is event-driven and allows you to run code without provisioning or managing servers.

• To communicate with S3 in a cross-account scenario, you can use IAM roles and policies to grant necessary permissions.

• Create a role in the account where the Lambda function resides with permissions to access the S3 bucket in the other account.

• U...read more

Find all pairs of elements in an array that add up to a given target.

• Iterate through the array and use a hashmap to store the difference between the target and each element.

• Check if the current element exists in the hashmap, if so, print the pair.

• If no pair is found, print (-1, -1).

Given an integer, find the sum of even and odd digits separately.

• Iterate through each digit of the integer and check if it is even or odd

• Keep track of the sum of even and odd digits separately

• Return the sums of even and odd digits

The best approach to cost optimization involves identifying inefficiencies, prioritizing cost-saving opportunities, and implementing strategic solutions.

• Conduct a thorough analysis of current expenses to identify areas of inefficiency

• Prioritize cost-saving opportunities based on potential impact and feasibility

• Implement strategic solutions such as renegotiating contracts, optimizing processes, or investing in technology

• Regularly review and adjust cost-saving strategies to ens...read more

AWS Landing Zones and Control Tower are AWS solutions for setting up and managing secure, multi-account AWS environments.

• AWS Landing Zones is a solution that helps customers set up a secure, multi-account AWS environment based on AWS best practices.

• AWS Control Tower is a service that provides the easiest way to set up and govern a secure, multi-account AWS environment based on AWS best practices.

• Both Landing Zones and Control Tower help organizations automate the setup of a b...read more

Control towers manage air traffic and guide planes to designated landing zones.

• Control towers communicate with pilots to provide instructions for takeoff, landing, and taxiing.

• Landing zones are designated areas on the runway where planes touch down and come to a stop.

• Control towers use radar and communication systems to monitor and coordinate the movement of aircraft.

• Efficient communication and coordination between control towers and pilots are crucial for safe and timely lan...read more

I have worked on various AWS services including EC2, S3, RDS, Lambda, and CloudFormation.

• EC2

• S3

• RDS

• Lambda

• CloudFormation

Troubleshooting skills in AWS involve identifying and resolving issues with cloud services and infrastructure.

• Ability to analyze logs and metrics to identify root causes of issues

• Experience with AWS monitoring tools like CloudWatch and X-Ray

• Knowledge of AWS service limits and best practices for optimizing performance

• Familiarity with AWS support options and escalation procedures

I prioritize tasks based on deadlines, complexity, and impact on overall project goals.

• Assess the deadline for the task and prioritize accordingly

• Evaluate the complexity of the task and allocate resources accordingly

• Consider the impact of the task on the overall project goals

I have recently used AWS Lambda, AWS S3, and AWS RDS services.

• AWS Lambda for serverless computing

• AWS S3 for object storage

• AWS RDS for managed relational databases

Transit gateways are network devices that connect different networks and control the flow of traffic between them.

• Transit gateways act as a bridge between different networks, such as connecting an on-premises network to a cloud network.

• They enforce security policies and perform routing functions to direct traffic to the appropriate destination.

• Transit gateways can also provide network address translation (NAT) services to allow communication between networks with different ad...read more

An AWS architect level question

• Understand the AWS Well-Architected Framework

• Have experience designing scalable and cost-effective AWS solutions

• Familiarity with various AWS services like EC2, S3, RDS, etc.

I handled data imbalance by using techniques like oversampling, undersampling, SMOTE, or using ensemble methods.

• Used oversampling to increase minority class instances

• Used undersampling to decrease majority class instances

• Applied SMOTE (Synthetic Minority Over-sampling Technique) to generate synthetic samples for minority class

• Utilized ensemble methods like Random Forest or Gradient Boosting to handle imbalance

An application similar to Practo for booking doctor appointments and managing medical records.

• Allow users to search for doctors based on specialty, location, and availability.

• Provide a platform for users to book appointments online with their preferred doctors.

• Include features for users to store and access their medical records securely.

• Implement a rating and review system for doctors to help users make informed decisions.

• Offer teleconsultation services for remote medical con...read more