220-1201 Cloud Computing Concepts — 20 Questions

Question 1

A company uses a cloud-based virtual desktop infrastructure (VDI) solution. Users report that logging in takes 5 minutes during peak hours. The IT team notices that the cloud provider's resource utilization is at 95%. Which action would best resolve this issue?

Accepted Answer

Scale up the virtual machines by increasing CPU and RAM. This question addresses resource contention in cloud VDI. High utilization (95%) indicates the provider's resources are saturated, causing slow logins. Scaling up (vertical scaling) by increasing the VM size provides more CPU/RAM per user, improving performance. Scaling out adds more VMs but doesn't address the root cause of resource saturation on existing VMs. Migrating to a different model or disabling auto-scaling could worsen the issue.

Answer

Migrate to a different cloud provider

Answer

Scale out by adding more virtual desktops

Answer

Disable automatic scaling

Question 2

A company uses a public cloud provider for compute resources. To reduce costs, they want to use unused capacity at a lower price but accept that the instance may be terminated with short notice. Which pricing model should they choose?

Accepted Answer

Spot instance. This question tests knowledge of advanced cloud pricing models. A spot instance (or preemptible VM) uses unused cloud capacity at a steep discount but can be terminated when the provider needs the resources back. On-demand is full price, reserved is for long-term commitments, and dedicated hosts are for isolation, not cost savings with termination risk.

Answer

On-demand instance

Answer

Reserved instance

Answer

Dedicated host

Question 3

A user complains that their cloud-hosted virtual desktop is slow to open applications and frequently disconnects. They are using a satellite internet connection. Which cloud characteristic is most likely being impacted?

Accepted Answer

Latency. This scenario tests understanding of cloud computing characteristics, specifically latency. Slow application opening and disconnections are classic symptoms of high latency, which is often caused by the physical distance data must travel over a satellite connection. The other options (elasticity, scalability, high availability) are cloud features that do not directly address network delay.

Answer

High availability

Answer

Elasticity

Answer

Scalability

Question 4

A user receives an error when trying to access a cloud application: 'This application is not available in your region.' The user is traveling abroad. Which cloud concept is most likely causing this restriction?

Accepted Answer

Geolocation. This scenario tests understanding of geolocation restrictions in cloud services. Many cloud applications use geolocation to enforce licensing, compliance, or content restrictions based on the user's physical location. High availability, multi-tenancy, and resource pooling are unrelated to region-based access controls.

Answer

High availability

Answer

Multi-tenancy

Answer

Resource pooling

Question 5

A technician is configuring a cloud-based virtual machine for a web server. The VM needs to handle traffic spikes automatically without manual intervention. Which cloud characteristic should be enabled?

Accepted Answer

Elasticity. This scenario tests the concept of elasticity in cloud computing. Elasticity allows resources to automatically scale up or down based on demand, which is ideal for handling traffic spikes. Scalability is a broader term that can include manual scaling, while high availability and fault tolerance focus on uptime, not automatic adjustment to load changes.

Answer

High availability

Answer

Fault tolerance

Answer

Scalability

Question 6

A technician is deploying a cloud-based application that requires a specific operating system and database. The company wants to avoid managing the underlying OS and patches. Which cloud service model should be used?

Accepted Answer

Platform as a Service (PaaS). This question tests the distinction between PaaS and other service models. Platform as a Service (PaaS) provides a managed platform including OS, runtime, and database, allowing the customer to focus on deploying their application without patching the OS. IaaS gives full control but requires OS management, SaaS is a finished application, and DaaS is for virtual desktops.

Answer

Infrastructure as a Service (IaaS)

Answer

Software as a Service (SaaS)

Answer

Desktop as a Service (DaaS)

Question 7

A small business wants to migrate its email and document collaboration to the cloud but must keep sensitive financial records on local servers due to regulatory requirements. Which cloud deployment model should they choose?

Accepted Answer

Hybrid cloud. This question covers cloud deployment models. A hybrid cloud combines public cloud services (for email/collaboration) with private or on-premises infrastructure (for sensitive data). Public cloud alone would violate regulations, community cloud is for shared industry needs, and private cloud is entirely on-premises, missing the benefits of public cloud for non-sensitive workloads.

Answer

Public cloud

Answer

Private cloud

Answer

Community cloud

Question 8

A company uses a cloud-based customer relationship management (CRM) application. The vendor handles all updates, security patches, and infrastructure maintenance. Which cloud service model does this represent?

Accepted Answer

Software as a Service (SaaS). This scenario describes Software as a Service (SaaS), where the provider delivers a complete application over the internet. The user only needs a web browser and does not manage the underlying OS, servers, or updates. IaaS would give virtual machines, PaaS would provide a development platform, and DaaS would deliver virtual desktops.

Answer

Infrastructure as a Service (IaaS)

Answer

Platform as a Service (PaaS)

Answer

Desktop as a Service (DaaS)

Question 9

A user reports that their cloud-based application is running slowly, and the IT team discovers that the application is hosted in a different geographic region than the user. Which cloud concept is most directly affecting performance?

Accepted Answer

Latency. This scenario tests understanding of latency in a global cloud context. When an application is hosted far from the user, the physical distance increases network latency, causing slow performance. Bandwidth could be a factor but is not directly tied to geographic distance, while elasticity and fault tolerance are unrelated to the location of the host.

Answer

Bandwidth

Answer

Elasticity

Answer

Fault tolerance

Question 10

A user reports that their cloud storage files are not syncing to their laptop. The internet connection is working, and other cloud services are accessible. Which of the following is the most likely cause?

Accepted Answer

The cloud sync client application is not running. This question tests troubleshooting cloud synchronization issues. A common cause is the client application being stopped or crashed, which prevents syncing despite a working internet connection. Account suspension would block access entirely, firewall rules would affect other services too, and server downtime would impact all users, not just one.

Answer

The cloud storage server is down for maintenance

Answer

The user's account has been suspended

Answer

A firewall is blocking the sync port

Question 11

A user reports that they cannot access a cloud-based CRM application from their office, but they can access it from home. The technician checks the office firewall and finds that outbound HTTPS traffic is allowed. What should the technician investigate next?

Accepted Answer

DNS resolution for the CRM's domain. If outbound HTTPS is allowed, the issue may be with DNS resolution, which can be blocked or misconfigured by the office network. The CRM's domain name might not resolve correctly, preventing the connection. The technician should test DNS resolution for the CRM's URL.

Answer

The user's browser cache

Answer

The cloud provider's service status

Answer

The user's account permissions

Question 12

A user reports that their cloud-based file synchronization service stopped updating files after a recent OS update. The technician verifies the service is running and the internet connection is active. What should the technician check next?

Accepted Answer

Check the sync client's authentication status. Cloud file sync issues often stem from authentication problems, such as expired credentials or session tokens. Since the service is running and connectivity is fine, the most likely cause is that the user's login token expired and needs re-authentication. Checking the sync logs would reveal the authentication failure.

Answer

Reinstall the sync client application

Answer

Disable the firewall temporarily

Answer

Increase the storage quota on the cloud account

Question 13

A technician is configuring a cloud-based virtual machine for a developer who needs to run a custom application that requires 16 GB of RAM and 4 vCPUs. The technician selects an instance type that meets these specs. After launching, the developer complains the application runs slowly. What is the most likely cause?

Accepted Answer

Resource contention from other tenants. Cloud VMs often experience resource contention due to noisy neighbors in multi-tenant environments. Even if the instance type meets specs, performance can degrade if other tenants on the same physical host consume resources. The technician should check if the instance is on a shared host and consider dedicated instances.

Answer

Insufficient storage IOPS

Answer

Network bandwidth throttling

Answer

Incorrect operating system version

Question 14

A company uses a public cloud IaaS provider. The security team discovers that a virtual machine's data disk was accidentally deleted by an administrator. They need to recover the data from a snapshot taken 24 hours ago. The snapshot is stored in the same cloud region. What is the most efficient recovery method?

Accepted Answer

Create a new data disk from the snapshot and attach it to the VM. Most cloud IaaS providers allow creating a new volume from a snapshot, which can then be attached to the existing VM. This is faster than restoring the entire VM from a full image. The technician should create a new disk from the snapshot and attach it, then copy the data to the original disk if needed.

Answer

Restore the entire VM from the snapshot

Answer

Download the snapshot to an on-premises server and then upload it

Answer

Use the snapshot to create a new VM and then copy files via network

Question 15

A technician is setting up a cloud-based application that must handle unpredictable spikes in user traffic. The application should automatically add more virtual servers during peak times and remove them when traffic decreases. Which cloud concept is this?

Accepted Answer

Elasticity. Elasticity is the ability to automatically scale resources up and down in response to demand. This is a key benefit of cloud computing, allowing cost efficiency while handling spikes. Scalability is a broader term that includes manual scaling, but elasticity specifically implies automatic, dynamic adjustment.

Answer

Scalability

Answer

High availability

Answer

Load balancing

Question 16

A small business owner wants to access their accounting software from any device, including a tablet and a home computer, without installing the software locally. Which cloud service model should the technician recommend?

Accepted Answer

Software as a Service (SaaS). SaaS (Software as a Service) delivers applications over the internet, accessible via a web browser without local installation. This matches the requirement of accessing accounting software from any device without installation. PaaS and IaaS provide platforms or infrastructure, not end-user applications.

Answer

Infrastructure as a Service (IaaS)

Answer

Platform as a Service (PaaS)

Answer

Desktop as a Service (DaaS)

Question 17

A technician is migrating a database from an on-premises server to a cloud platform. The database contains sensitive customer information. The company requires that data be encrypted both at rest and in transit. Which combination of technologies should the technician implement?

Accepted Answer

TLS for in transit and AES-256 for at rest. For data in transit, TLS/SSL encrypts communication between the application and the database. For data at rest, the cloud provider's encryption feature (e.g., AWS EBS encryption or Azure SQL TDE) encrypts the stored data. AES-256 is a common encryption standard for at-rest data, but it must be implemented by the provider's service.

Answer

SSL for at rest and IPsec for in transit

Answer

VPN for in transit and hashing for at rest

Answer

SSH tunneling for at rest and TLS for in transit

Question 18

A company uses a cloud storage service for backup. The technician needs to ensure that if the primary cloud region goes down, the backups are still accessible from another geographic location. Which cloud characteristic should be configured?

Accepted Answer

High availability. High availability across regions is achieved through redundancy, such as replicating data to multiple geographic locations. This ensures that if one region fails, another can serve the data. Scalability, elasticity, and fault tolerance at a single site do not provide geographic redundancy.

Answer

Elasticity

Answer

Scalability

Answer

Fault tolerance

Question 19

A company's cloud-based virtual desktop infrastructure (VDI) is experiencing slow logins for users in a remote office. The network latency between the remote office and the cloud data center is 150 ms. What is the most effective solution to improve login performance?

Accepted Answer

Deploy a local VDI broker or caching server at the remote office. High latency significantly impacts VDI performance, especially during login when many resources are loaded. Deploying a local VDI broker or caching server at the remote office reduces round-trip time. Alternatively, using a CDN or WAN optimization can help, but a local broker is most effective for VDI.

Answer

Increase the bandwidth at the remote office

Answer

Upgrade the cloud VDI servers to faster CPUs

Answer

Switch to a different cloud provider

Question 20

A company is migrating its on-premises email server to a cloud service. Employees must retain all existing emails and folders. Which cloud deployment model best fits this requirement?

Accepted Answer

Hybrid cloud. A hybrid cloud deployment combines on-premises infrastructure with public cloud services, allowing data migration while maintaining local access during the transition. This ensures existing emails can be retained and synchronized. A public-only or private-only model would not support the migration seamlessly.

Answer

Public cloud

Answer

Private cloud

Answer

Community cloud