A Web Application Runs on Amazon EC2 Instances Behind an Application

question 260

Multiple Choice

A web application runs on Amazon EC2 instances behind an Application Load Balancer. The application allows users to create custom reports of historical weather data. Generating a report can take up to 5 minutes. These long-running requests use many of the available incoming connections, making the system unresponsive to other users. How can a solutions architect make the system more responsive?

• A) Use Amazon SQS with AWS Lambda to generate reports.
• B) Increase the idle timeout on the Application Load Balancer to 5 minutes.
• C) Update the client-side application code to increase its request timeout to 5 minutes.
• D) Publish the reports to Amazon S3 and use Amazon CloudFront for downloading to the user.

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Definitions:

High-Low Method

A technique used in cost accounting to estimate fixed and variable costs based on the highest and lowest levels of activity.

Variable Cost

A cost that varies directly with the level of production or sales volume, such as materials and labor costs.

Regression Study

An analysis technique used to determine the relationship between dependent and independent variables, often used for prediction and forecasting.

Inflation

The rate at which the general level of prices for goods and services is rising, leading to a decrease in purchasing power.