AWS Trusted Advisor recommendations - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ service_behavior

intermediate

Understanding AWS Trusted Advisor Cost Optimization Checks

Which of the following AWS Trusted Advisor checks helps identify unused or idle resources to reduce costs?

A Service Limits - Monitors usage against service quotas

B Underutilized Amazon EC2 Instances - Identifies instances with low CPU utilization

C Security Groups - Checks for overly permissive rules

D S3 Bucket Permissions - Checks for public access

💡 Hint

Think about which check focuses on resource usage and cost savings.

The 'Underutilized Amazon EC2 Instances' check identifies EC2 instances with low CPU usage, helping reduce costs by stopping or resizing them.

❓ security

intermediate

AWS Trusted Advisor Security Check Purpose

Which AWS Trusted Advisor check helps you find security risks related to your AWS Identity and Access Management (IAM) settings?

A IAM Use - Checks for unused IAM users

B S3 Bucket Permissions - Checks for public read or write access

C Security Groups - Checks for unrestricted inbound access

D MFA on Root Account - Checks if multi-factor authentication is enabled on the root user

💡 Hint

Consider which check protects the most powerful account in AWS.

Enabling MFA on the root account adds an extra layer of security, and Trusted Advisor checks if this is enabled.

❓ Architecture

advanced

Interpreting AWS Trusted Advisor Service Limits Check

You receive a Trusted Advisor alert about approaching service limits for Amazon RDS instances. What is the best architectural response?

A Ignore the alert since limits reset monthly

B Delete all existing RDS instances to free up capacity

C Request a service limit increase from AWS Support before reaching the limit

D Switch to a different AWS region without checking limits

💡 Hint

Think about how to handle resource limits proactively.

Requesting a limit increase prevents service disruption and supports scaling your architecture safely.

✅ Best Practice

advanced

AWS Trusted Advisor Recommendations for Fault Tolerance

Which Trusted Advisor check helps improve fault tolerance by identifying single points of failure?

A Amazon RDS Backups - Checks if automated backups are enabled

B Amazon EC2 Reserved Instances - Checks for unused reservations

C Amazon S3 Bucket Permissions - Checks for public access

D Service Limits - Checks usage against quotas

💡 Hint

Think about backups and recovery in case of failure.

Enabling automated backups on RDS improves fault tolerance by allowing recovery from failures.

🧠 Conceptual

expert

Analyzing AWS Trusted Advisor Impact on Security Posture

After running AWS Trusted Advisor, you find that your S3 buckets have public read access warnings. What is the most secure and practical next step?

A Review each bucket's purpose and restrict public access only where it is not required

B Immediately remove all public access permissions from all buckets without review

C Ignore the warnings if the buckets contain only non-sensitive data

D Delete all buckets with public access to prevent any risk

💡 Hint

Consider balancing security with business needs.

Not all public access is bad; some buckets are meant to be public. Review and restrict only unnecessary public access.

Practice

1. What is the primary purpose of AWS Trusted Advisor?

easy

A. To monitor real-time application logs

B. To deploy new AWS services automatically

C. To provide recommendations for cost savings, security, and performance improvements

D. To create backups of AWS resources

Solution

1. Step 1: Understand Trusted Advisor's role

   AWS Trusted Advisor analyzes your AWS environment and suggests improvements in cost, security, fault tolerance, and performance.

2. Step 2: Compare options with Trusted Advisor's functions

   Only To provide recommendations for cost savings, security, and performance improvements matches Trusted Advisor's purpose; others describe different AWS services.

3. Final Answer:

   To provide recommendations for cost savings, security, and performance improvements -> Option C

4. Quick Check:

   Trusted Advisor = Recommendations [OK]

Hint: Trusted Advisor gives advice, not deploys or monitors [OK]

Common Mistakes:

• Confusing Trusted Advisor with AWS CloudWatch
• Thinking it deploys services automatically
• Assuming it manages backups

2. Which AWS Trusted Advisor category checks for unused or idle resources to help reduce costs?

easy

A. Cost Optimization

B. Fault Tolerance

C. Security

D. Performance

Solution

1. Step 1: Identify the category related to cost savings

   The Cost Optimization category focuses on reducing unnecessary expenses by identifying idle or underused resources.

2. Step 2: Match categories to their functions

   Security checks protect resources, Fault Tolerance improves availability, Performance enhances speed; only Cost Optimization targets unused resources.

3. Final Answer:

   Cost Optimization -> Option A

4. Quick Check:

   Idle resources = Cost Optimization [OK]

Hint: Cost Optimization finds idle resources to save money [OK]

Common Mistakes:

• Choosing Security for cost-related checks
• Confusing Fault Tolerance with cost savings
• Selecting Performance instead of Cost Optimization

3. You run AWS Trusted Advisor and see a recommendation to "Enable Multi-Factor Authentication (MFA) on root account." What will happen if you follow this advice?

medium

A. Your root account will have an extra security layer requiring a second verification step

B. Your AWS resources will automatically back up daily

C. Your billing alerts will be disabled

D. Your EC2 instances will be stopped automatically

Solution

1. Step 1: Understand MFA's function on root account

   Enabling MFA adds a second step to login, improving security by requiring a code from a device.

2. Step 2: Evaluate the effects of enabling MFA

   It does not affect backups, billing alerts, or EC2 instance states; it only secures the root user login.

3. Final Answer:

   Your root account will have an extra security layer requiring a second verification step -> Option A

4. Quick Check:

   MFA = Extra login security [OK]

Hint: MFA means extra login step for security [OK]

Common Mistakes:

• Thinking MFA triggers backups
• Assuming it disables billing alerts
• Believing it controls EC2 instance state

4. You receive a Trusted Advisor alert about "Security Groups with unrestricted access." What is the best way to fix this issue?

medium

A. Disable Trusted Advisor alerts

B. Remove rules that allow inbound traffic from 0.0.0.0/0 unless necessary

C. Open all ports to all IP addresses

D. Delete all security groups immediately

Solution

1. Step 1: Understand the risk of unrestricted access

   Allowing inbound traffic from 0.0.0.0/0 means anyone on the internet can access your resources, which is risky.

2. Step 2: Apply the best security practice

   Remove or restrict such rules to only trusted IPs or ranges; deleting all security groups or opening all ports is unsafe, and disabling alerts ignores the problem.

3. Final Answer:

   Remove rules that allow inbound traffic from 0.0.0.0/0 unless necessary -> Option B

4. Quick Check:

   Restrict open access = Fix security groups [OK]

Hint: Close open access, keep only needed IPs [OK]

Common Mistakes:

• Deleting all security groups blindly
• Opening all ports to everyone
• Ignoring alerts by disabling them

5. Your company wants to improve fault tolerance using AWS Trusted Advisor. Which recommendation should you prioritize to achieve this?

hard

A. Use AWS Trusted Advisor to identify underutilized EC2 instances

B. Disable CloudTrail logging to reduce costs

C. Open all security group ports to increase accessibility

D. Enable Amazon S3 versioning to protect data from accidental deletion

Solution

1. Step 1: Understand fault tolerance goals

   Fault tolerance means systems keep working despite failures, often by protecting data and resources.

2. Step 2: Evaluate recommendations for fault tolerance

   Enabling S3 versioning protects data by keeping copies, improving fault tolerance. Identifying underutilized instances helps cost but not fault tolerance. Opening all ports reduces security. Disabling CloudTrail removes audit logs, harming security and fault tolerance.

3. Final Answer:

   Enable Amazon S3 versioning to protect data from accidental deletion -> Option D

4. Quick Check:

   Fault tolerance = Data protection with versioning [OK]

Hint: Versioning protects data, boosting fault tolerance [OK]

Common Mistakes:

• Confusing cost savings with fault tolerance
• Opening all ports thinking it helps availability
• Disabling logging to save money