Linux+ V8 Namespaces and Cgroups Quiz

1. What command is used to create a namespace for a process?

Unshare

Nsenter

Cgroup

Isolate

2. The devices cgroup subsystem controls access to which resources?

Character and block devices

Network interfaces

Memory pages

CPU cores

3. Namespaces and cgroups together enable what technology?

Containerization and resource-isolated environments

Virtual machine hypervisor functionality

Network encryption and VPN tunneling

Filesystem redundancy and RAID management

4. Which cgroup version is the default in modern Linux systems?

Cgroups v1

Cgroups v2

Cgroups hybrid mode

Cgroups legacy

5. The ____ namespace allows containers to have separate process trees.

PID

PROC

TREE

FORK

6. What is the purpose of the freezer cgroup subsystem?

To suspend and resume process execution

To limit CPU frequency scaling

To manage network packet filtering

To allocate memory pages

7. Which file in /proc contains namespace information for a process?

/proc/[pid]/ns

/proc/[pid]/namespaces

/proc/namespaces/[pid]

/proc/[pid]/cgroups

8. How many major namespaces exist in Linux?

6

8

10

12

9. What does the IPC namespace isolate?

Inter-process communication mechanisms like message queues and shared memory

Network interface configurations

User account information

CPU scheduling policies

10. Which cgroup subsystem limits memory usage for a process group?

Memory

Memcg

Ram

Swap

11. What is the primary purpose of Linux namespaces?

To isolate system resources and create separate views of the system

To allocate CPU and memory resources to processes

To encrypt data in transit between containers

To manage network packet routing

12. The mount (mnt) namespace isolates what?

Filesystem mount points and mount propagation

File permissions and ownership

Disk quotas and usage limits

Network socket bindings

13. Which cgroup subsystem manages block device I/O operations?

Blkio

Devices

Cpuacct

Freezer

14. What is the purpose of the user namespace?

To map container user IDs to host user IDs

To manage network access controls

To allocate disk space quotas

To isolate process signals

15. The UTS namespace isolates which system identifiers?

Hostname and domain name

User IDs and group IDs

Network interfaces and routing

Filesystem paths and mount points

16. Which cgroup subsystem controls CPU scheduling?

Cpuset

Cpu

Memory

Blkio

17. What is the primary function of cgroups?

To limit and monitor resource usage by processes

To create isolated network views

To encrypt inter-process communication

To manage user authentication

18. Which command displays the namespaces of a running process?

Lsns

Cgroup

Nsctl

Namespace-list

19. What does the PID namespace isolate?

Process identification numbers and process hierarchies

User accounts and permissions

Filesystem mount points

Network bandwidth allocation

20. Which namespace is responsible for isolating network interfaces and routing tables?

PID namespace

Network (net) namespace

User namespace

Mount (mnt) namespace

Linux+ V8 Namespaces and Cgroups Basics Quiz