A Company Runs a Three-Tier Application in AWS

question 453

Multiple Choice

A company runs a three-tier application in AWS. Users report that the application performance can vary greatly depending on the time of day and functionality being accessed. The application includes the following components: Eight t2.large front-end web servers that serve static content and proxy dynamic content from the application tier. Four t2.large application servers. One db.m4.large Amazon RDS MySQL Multi-AZ DB instance. Operations has determined that the web and application tiers are network constrained. Which of the following is a cost effective way to improve application performance? (Choose two.)

• A) Replace web and app tiers with t2.xlarge instances
• B) Use AWS Auto Scaling and m4.large instances for the web and application tiers
• C) Convert the MySQL RDS instance to a self-managed MySQL cluster on Amazon EC2
• D) Create an Amazon CloudFront distribution to cache content
• E) Increase the size of the Amazon RDS instance to db.m4.xlarge

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Definitions:

Milgram Experiment

A psychological experiment conducted by Stanley Milgram in the 1960s to study obedience to authority, where participants were instructed to administer electric shocks to another person.

Stanford University Prison Experiment

A psychological study conducted by Philip Zimbardo in 1971 at Stanford University, where students were assigned roles of prisoners and guards to explore the effects of perceived power.

Generalization

Drawing a conclusion about a certain characteristic of a population based on a sample from it.

Logical Support

The provision of reasons or evidence to justify a claim or argument.