M9: Cloud Architecture

Question 1

Six design principles for operational excellence in the cloud

Answer 1

1. Perform operations as code
2. Annotate documentation
3. Make frequent, small, reversible changes
4. Refine operations procedures frequently
5. Anticipate failure
6. Learn from all operational failures

Question 2

Three best practise areas for cloud operational excellence

Answer 2

Prepare
Operate
Evolve

Question 3

Seven design principles of the security pillar

Answer 3

1. Implement a strong identity foundation
2. Enable traceability
3. Apply security at all layers
4. Automate security best practises
5. Protect data in transit and at rest
6. Keep people away from data
7. Prepare for security events

Question 4

Five design principles of the reliability pillar

Answer 4

1. Test recovery procedures
2. Automatically recover from failure
3. Scale horizontally to increase aggregate system availability
4. Stop guessing capacity
5. Manage change in automation

Question 5

Four best practice areas for performance efficiency pillar

Answer 5

Selection
Review
Monitoring
Tradeoffs

Question 6

Five design principles of the cost optimization pillar

Answer 6

1. Measure overall efficiency
2. Stop spending money on data centre operations
3. Analyze and attribute expenditure
4. Use managed and application level services to reduce cost of ownership
5. Adopt a consumption model

Question 7

Reliability

Answer 7

Probability that a system will function as intended for a specified period of time. Mean time between failures.

Question 8

Availability

Answer 8

The percentage of uptime over a period of time (length of time between failures / year). Number of 9s. 5 9s is 99.999 percent availability.

Question 9

Highly available system

Answer 9

Can withstand some degradation while remaining available.

Question 10

Three factors that determine an application’s availability

Answer 10

1. Fault tolerance
2. Scalability
3. Recoverability

Question 11

AWS Trusted Advisor

Answer 11

Tool for reviewing your architectures.

Question 12

Trusted advisor recommendation areas

Answer 12

Cost optimization
Performance
Security
Fault tolerance
Service limits