Questions
- What are the options available to increase the scalability of the system?
A. Vertical scaling or scaling up
B. Horizontal scaling or scaling out
C. Both
D. None of the above
Answer – C
- What is vertical scaling or scaling up?
A. Vertical scaling or scaling up means adding more resources to a single application server and increasing its hardware capacity, typically achieved by increasing the capacity of the CPU or memory.
B. Vertical scaling or scaling up means adding more processing servers/machines to a system.
C. Vertical scaling or scaling up means adding caching to your system to avoid database calls for frequently used objects.
D. None of the above.
Answer – A
- What is an availability zone?
A. An availability zone is a logical group of VMs within a data center in an Azure region and promises availability of 99.95%. They don't provide resiliency and high availability in the event of the outage of an entire data center.
B. An availability zone is made up of one or more data centers with independent power, cooling, and networking. It's a physical location within an Azure region and provides high availability (99.99%) even in the case of data center failures.
C. An availability zone is a pair of regions and each region consists of a set of data centers connected through a dedicated low-latency network.
D. An availability zone is a DNS-based load balancer to distribute traffic to internet-facing endpoints across global regions.
Answer – B
- Which of the following statements is correct?
A. SQL Always On availability groups support a set of read-write primary databases and 1 to 12 sets of secondary databases to which we can fail over.
B. SQL Always On availability groups support a set of read-write primary databases and one to four sets of secondary databases to which we can fail over.
C. SQL Always On availability groups support a set of read-write primary databases and one set of secondary databases to which we can fail over.
D. SQL Always On availability groups support a set of read-write primary databases and one to eight sets of secondary databases to which we can fail over.
Answer – D
- Services can be deployed and scaled independently. Issues in one service will have a local impact and can be fixed by just deploying the impacted service.
A. Domain-driven design principle
B. Single-responsibility principle
C. Stateless service principle
D. Resiliency principle
Answer – B
- What are stateful services?
A. Stateful services maintain contextual information during transactions and subsequent requests within a transaction need to hit the same server, hence designing for high availability and scalability becomes a challenge.
B. Stateful services do not maintain contextual information during transactions and subsequent requests within a transaction can hit any server, hence designing for high availability and scalability is not a challenge.
C. Stateful services are the right approach to build your services for a highly scalable distributed application.
Answer – A
