Containers vs Virtual Machines Questions and Answers for Viva

Answer-1: Containers share the host OS kernel while virtual machines run separate guest OS instances on a hypervisor.

Answer-2: A container is a lightweight,standalone executable that includes everything needed to run an application: code,runtime,system tools,libraries,and settings.

Answer-3: A virtual machine is an emulation of a physical computer that runs its own operating system and applications on a hypervisor.

Answer-4: No,containers run on a container engine like Docker and share the host OS kernel.

Answer-5: Yes,each VM includes a full guest OS which runs on top of the host OS via a hypervisor.

Answer-6: Containers are more lightweight than VMs as they don?t require a full OS.

Answer-7: Containers typically offer better performance due to less overhead from not running full OS instances.

Answer-8: Yes,containers are more portable and consistent across environments because they encapsulate the application and its dependencies.

Answer-9: Containers are typically in MBs,whereas VMs can be several GBs in size.

Answer-10: Yes,containers can be deployed inside virtual machines.

Answer-11: Docker is one of the most popular containerization platforms.

Answer-12: Hypervisors like VMware,Hyper-V,and KVM are commonly used for running VMs.

Answer-13: Containers boot in seconds or less,while VMs can take minutes to start.

Answer-14: Yes,containers are ideal for deploying microservices due to their scalability and isolation.

Answer-15: Containers offer process-level isolation,but VMs provide stronger isolation through hardware emulation.

Answer-16: VMs provide stronger isolation since each VM has its own OS and kernel.

Answer-17: Yes,though it's best practice to run a single app per container for better manageability.

Answer-18: Yes,since VMs run a full OS,multiple applications can be run just like on a physical machine.

Answer-19: It is the automated management of containers using tools like Kubernetes.

Answer-20: VMs have higher overhead due to full OS instances,while containers share OS resources,reducing overhead.

Answer-21: Yes,Docker and other platforms support containers on Windows.

Answer-22: Yes,containers consume fewer resources such as CPU and memory.

Answer-23: Yes,legacy apps often require a full OS,which VMs provide.

Answer-24: Containers are generally preferred for DevOps due to faster deployment and integration.

Answer-25: Docker is a platform used to build,run,and manage containers.

Answer-26: A hypervisor is software that creates and runs virtual machines.

Answer-27: Yes,containers are widely used in production environments.

Answer-28: Yes,many systems use containers within VMs for additional isolation and flexibility.

Answer-29: A container image is a static specification that includes the app code,libraries,and dependencies required to run the app.

Answer-30: Snapshotting allows saving the current state of a VM to revert later if needed.

Answer-31: Live migration is more common in VMs; containers typically restart quickly instead.

Answer-32: Containers use lightweight networking stacks like bridges; VMs use virtual NICs with more overhead.

Answer-33: Yes,containers can run consistently across different environments,assuming compatible runtimes.

Answer-34: They are used to persist data across container restarts and are managed by Docker.

Answer-35: Technically yes,but it is not common or practical; VMs are better suited for this.

Answer-36: By building a new container image and redeploying it.

Answer-37: By applying updates to the OS and restarting if needed.

Answer-38: Containers scale faster and more efficiently due to their lightweight nature.

Answer-39: Yes,if one VM crashes,others remain unaffected due to OS-level separation.

Answer-40: Containers are better due to quick setup,teardown,and consistent environments.

Answer-41: Containers are typically stateless,though they can be made stateful using volumes or external storage.

Answer-42: Yes,using Docker Desktop or WSL2 on Windows 10/11.

Answer-43: Yes,most containers are built on minimal base images like Alpine or Ubuntu.

Answer-44: Yes,VMs can access hardware through hypervisor configurations.

Answer-45: Yes,but with limitations and based on configured access and permissions.

Answer-46: VMs are more secure by default due to stronger isolation.

Answer-47: Repositories like Docker Hub or Google Container Registry store container images for sharing and deployment.

Answer-48: Modern app development,microservices,testing environments,and scalable cloud deployments.

Answer-49: Legacy app hosting,full OS environments,secure and isolated workloads.

Answer-50: Using tools like Prometheus,Grafana,Docker Stats,and Kubernetes metrics.