CV0-004 Practice Test 4 — 10 Questions

Question 1

Which THREE of the following are common causes of VM migration failures in a cloud environment? (Choose three.)

Accepted Answer

Incompatible CPU instruction sets or features between source and target hosts. Option B is correct because live or cold migration requires the target host's CPU to expose the same instruction set extensions (e.g., SSE4.2, AVX, VT-x/AMD-V) that the VM's configuration and guest OS expect; a mismatch causes the migration to fail or be blocked by compatibility checks such as those in vSphere EVC or Hyper-V processor compatibility mode. Option D is correct because the target datastore must have enough free capacity to hold the VM's disks, snapshots, swap, and memory files; if provisioning the destination files exceeds available space, the migration aborts with an out-of-space error. Option E is correct because migration traffic (e.g., vMotion over TCP 8000, or shared storage access over iSCSI/NFS) depends on reliable, adequately provisioned network links between source and target hypervisors; packet loss, MTU mismatch, or blocked ports will break the transfer. Option A is not a typical migration failure cause because hypervisor and guest licensing is generally checked at power-on or activation time, not during the migration operation itself. Option C is not a typical cause because stale DNS records for the VM's hostname affect name resolution and connectivity after migration, but they do not prevent the hypervisor-level migration process from completing.

Answer

Expired software licenses on the target host

Answer

Stale DNS records for the VM's hostname

Question 2

A containerized application deployment fails with an 'ImagePullBackOff' error. What should the administrator verify?

Accepted Answer

The container registry credentials and image tag. ImagePullBackOff means the container runtime cannot pull the image, which is almost always caused by invalid registry credentials, a wrong image tag, or an image that does not exist. Verifying the registry credentials and the exact image tag/name is the correct first troubleshooting step.

Answer

The CPU utilization on the node

Answer

The cluster's DNS configuration

Answer

The firewall rules between nodes and registry

Question 3

A DevOps team uses Jenkins for CI/CD. They want to automatically deploy containerized applications to a Kubernetes cluster. Which Jenkins feature or plugin can integrate with Kubernetes to manage deployments?

Accepted Answer

Kubernetes plugin. The Kubernetes plugin for Jenkins allows Jenkins agents to be dynamically provisioned as pods within a Kubernetes cluster, enabling automated deployment of containerized applications. It integrates directly with the Kubernetes API to manage deployments, services, and other resources, making it the correct choice for this scenario.

Answer

Jenkins Declarative Pipeline

Answer

Jenkins Blue Ocean

Answer

Jenkins Multibranch Pipeline

Question 4

A cloud engineer is configuring a web application that must comply with PCI DSS. The application runs on virtual machines in a public cloud. Which of the following security responsibilities falls under the customer's scope according to the shared responsibility model?

Accepted Answer

Patching the guest operating system of the virtual machines. In the shared responsibility model, the customer is responsible for patching the guest OS, while the cloud provider manages the physical infrastructure and hypervisor.

Answer

Replacing failed physical drives in the storage array

Answer

Configuring the physical network firewall

Answer

Applying hypervisor patches

Question 5

A cloud architect is designing a highly available web application on AWS. The application must continue serving traffic even if an entire AWS Availability Zone fails. Which architecture should the architect implement?

Accepted Answer

Active-active across two Availability Zones. Active-active architecture across multiple Availability Zones ensures that if one zone fails, traffic is routed to the remaining healthy zones, providing high availability.

Answer

Active-passive in a single Availability Zone

Answer

Vertical scaling on a single instance

Answer

Active-passive across two regions

Question 6

A cloud engineer is setting up automated patching for Linux instances in AWS. They need to define a maintenance window during which patches are applied. Which service should they use?

Accepted Answer

AWS Systems Manager Patch Manager. AWS Systems Manager Patch Manager is specifically designed to automate the process of patching managed nodes, including defining maintenance windows during which patches are applied. It allows you to create patch baselines, specify approved patches, and schedule patching within a maintenance window. This meets the requirement of automated patching with a defined maintenance window.

Answer

AWS Config

Answer

AWS OpsWorks

Answer

Amazon Inspector

Question 7

Match each storage type to its characteristic.

Accepted Answer

Object storage: Data stored as objects with metadata and a unique identifier, highly scalable.. Object storage uses objects with metadata (scalable for unstructured data), block storage uses fixed blocks (low-latency for databases), file storage uses hierarchical files (shared access), and SAN provides block-level access over a high-speed network. Common confusions swap object and block definitions.

Answer

Object storage: Data divided into blocks.

Answer

Block storage: Data stored as objects with metadata.

Question 8

A cloud administrator notices that a virtual machine (VM) is running slowly. The hypervisor shows high CPU ready time for that VM. Which of the following is the most likely cause?

Accepted Answer

Overcommitted physical CPU resources on the host. High CPU ready time indicates that the VM is ready to execute instructions but is waiting for the physical CPU to become available. This is a classic symptom of CPU overcommitment, where the host has more virtual CPUs (vCPUs) assigned to VMs than physical cores, causing contention. Option C correctly identifies this as the most likely cause.

Answer

High disk I/O latency on the datastore

Answer

Insufficient memory allocated to the VM

Answer

Misconfigured virtual switch

Question 9

Match each troubleshooting command to its function.

Accepted Answer

ping: Tests network connectivity to a remote host. Common CLI tools for network troubleshooting: ping tests reachability, traceroute shows the path, nslookup resolves DNS names. Confusing these functions is a typical mistake.

Answer

ping: Traces the route packets take to a destination

Answer

traceroute: Queries DNS to resolve domain names to IP addresses

Answer

nslookup: Tests network connectivity to a remote host

Question 10

A company is designing a hybrid cloud storage solution. Which TWO storage services are suitable for a shared file system accessible from both on-premises and cloud VMs? (Select TWO.)

Accepted Answer

Azure Files. Azure Files (B) is correct because it provides fully managed SMB and NFS file shares that can be mounted simultaneously from on-premises Windows/Linux machines and Azure VMs, making it a true shared file system for hybrid scenarios. Amazon EFS (E) is correct because it is a managed NFS file system that supports mounting from on-premises servers via AWS Direct Connect or VPN as well as from EC2 instances in multiple Availability Zones. Azure Blob (A) is object storage accessed via HTTP/REST rather than a mountable shared file system, so it does not meet the requirement. Amazon S3 (C) is also object storage with a REST API, not a POSIX/NFS/SMB file system. Amazon EBS (D) provides block storage volumes attached to a single EC2 instance and cannot be shared across on-premises and cloud VMs.

Answer

Azure Blob

Answer

Amazon S3

Answer

Amazon EBS