Question #1
H3Cloud cloud computing solution includes? (Multiple choice)
- A . CAS cloud computing management platform
- B . UIS server
- C . UIS storage
- D . UIS network
Correct Answer: ABCD
Question #2
Regarding link aggregation, which of the following statements are correct? (Multiple choice)
- A . In the same aggregation group, all selected ports do not necessarily need to have the same operation key.
- B . The numbers of the aggregation group and the aggregation interface are the same.
- C . In an aggregation group, even if a member port has different attribute configurations and protocol configurations from the corresponding aggregation interface, it will not affect the member port becoming the selected port.
- D . Link aggregation can provide link redundancy and increase link bandwidth.
Correct Answer: BD
Question #3
Each SCSI channel has a maximum of () SCSI IDs and can be connected to a maximum of () storage devices.
- A . 17/16
- B . 16/15
- C . 15/14
- D . 14/13
Correct Answer: B
Question #4
Which of the following options are features of RAID5? (Multiple choice)
- A . Generally speaking, RAID5 requires at least 3 hard drives.
- B . The number of hard disks with the same specifications is N, and they are made into a RAID5, then the actual available space is the space of N-1 hard disks.
- C . The check data is evenly distributed on all hard drives.
- D . Proprietary hard disk saves verification data
Correct Answer: ABC
Question #5
Which of the following options are indicators for measuring the performance of storage products? (Multiple choice)
- A . Bandwidth
- B . IOPS
- C . Maximum number of supported servers
- D . Maximum number of lun supported
Correct Answer: AB
Question #6
Servers are classified into which of the following categories based on different processor architectures? (Multiple choice)
- A . RISC architecture server
- B . Blade server
- C . X86 server
- D . IA-64 server
Correct Answer: ACD
Question #7
Regarding intel E5-2600v3 CPU, which of the following statements is correct? (Multiple choice)
- A . Belongs to Intel Zhiqiang E series processors
- B . The processor supports up to 2 CPUs
- C . Based on lvy bridge process
- D . Each CPU supports 4 memory channels (channels)
Correct Answer: ACD
Question #8
Regarding server RAID cards, which of the following statement is correct?
- A . Server disks do not need to use array cards when doing RAID0
- B . Write back mode, the data will be written directly to the disk, which is highly secure.
- C . The array card cache needs to be used in conjunction with the cache battery, otherwise there is a risk of data loss after power failure.
- D . Using FBWC, the data retention time does not exceed 72 hours. If the phone is dropped, the server recovery data must be flashed into the hard disk as soon as possible.
Correct Answer: C
Question #9
Which of the following are the advantages of SSD hard drives over SATA hard drives? (Multiple choice)
- A . Good random read and write performance
- B . Large hard disk capacity
- C . Low noise during operation
- D . There are no mechanical moving parts inside, so there is no fear of vibration.
Correct Answer: ACD
Question #10
The motherboard chipset determines which of the following parameters? (Multiple choice)
- A . Motherboard bus frequency
- B . Supported CPU types
- C . Type and number of extension interfaces
- D . Type and number of expansion slots
Correct Answer: ABCD
Question #11
Which of the following statements about x86 architecture virtualization are correct? (Multiple choice)
- A . The original x86 architecture was not suitable for virtualization because sensitive unprivileged instructions could not be captured by the VMM.
- B . Full virtualization solution requires modifying the guest OS
- C . In the paravirtualization solution, the hypervisor provides a hypercall interface to meet the key kernel operations of the guest os, such as memory management, interrupt time synchronization, etc.
- D . The hardware-assisted virtualization solution introduces VMCS (virtual-machine control structure), which saves the relevant status information of the virtual CPU.
Correct Answer: ACD
Question #12
CAS virtualization software includes which of the following components? (Multiple choice)
- A . CVM
- B . CVK
- C . KVM
- D . K8S
Correct Answer: AB
Question #13
Which of the following statements about CAS characteristics are correct?
- A . HA comprehensively considers load factors such as virtual machine CPU, memory, I/O throughput and the virtual machine’s affinity (Affinity) to the physical host, dynamically adjusts the division responsible for the business, and improves system availability.
- B . DRS can automatically select an idle server when a server fails and restart the VM on the idle server.
- C . DRX comprehensively considers load factors such as virtual machine CPU, memory, I/O throughput and virtual machine affinity (Affinity) to the physical host, dynamically adjusts the division responsible for the business, and improves system availability.
- D . V2V supports the conversion of vmware , citrix , kvm and other format virtual machines into H3CCAS virtual machines
Correct Answer: D
Question #14
Installation of CAS system through HDM (or ilo), which statement is wrong?
- A . CVM needs to be installed on the management server, but do not install CVM on the business server.
- B . The interface address configured during the installation process is the business network port address.
- C . After the installation is complete, you need to confirm that the ISO file has been disconnected from the image file selection in the virtual drivers menu.
- D . There is a trial period after CAS installation is completed. It is recommended to register for a formal license within this period.
Correct Answer: B
Question #15
Which of the following statements about the functions and functions of the CVM module is correct? (Multiple choice)
- A . Each server needs to install CVM as the hypervisor layer of server virtualization.
- B . CVM is responsible for server hardware resource management and virtual machine creation management.
- C . If the server is only used for CVM management and is not used as a CVK computing resource, the server does not need to support hardware-assisted virtualization.
- D . CVM supports high availability (HA), dynamic resource scheduling (DRS), virtual machine backup, network policy templates and other functions
Correct Answer: BCD
Question #16
Which of the following statements about the functions and functions of CVK components is correct? (Multiple choice)
- A . Each server needs to install the CVK component
- B . CVK supports ISCSI, FC, and NAS methods for mounting storage resources.
- C . When a CVK and the cluster shared file system both fail, cluster HA can still migrate the virtual machines on the failed CVK to other CVKs.
- D . CVK host must support hardware-assisted virtualization
Correct Answer: ABD
Question #17
Which of the following statements about CVM management functions is correct? (Multiple choice)
- A . The virtual machine view management function allows maintenance personnel to customize the virtual machine directory based on actual business scenarios.
- B . Cloud business is based on the virtualization function provided by CVM components, which abstracts physical resources such as computing, storage, and network into elastic virtual resource pools provided on demand.
- C . Host automatic discovery task management will automatically search for hosts that can be added and add them to the cluster to which the task belongs.
- D . The operation log records in detail the operations performed by all operators on the CVM and provides a download function.
Correct Answer: ABCD
Question #18
Which of the following descriptions of H3CCAS cloud resources is correct? (Multiple choice)
- A . You can directly create a cluster under cloud resources and add hosts to the cluster.
- B . Cloud resources mainly include computing resources, storage resources and network resources.
- C . The host can be added directly to the host pool or added to the cluster.
- D . Cloud resource management mainly includes host pool management, cluster management, host management, virtual machine management, virtual machine template management, policy management, storage management and network management.
Correct Answer: BCD
Question #19
Which of the following descriptions about virtual switches is correct? (Multiple choice)
- A . A virtual switch is a network platform that is simulated through software and has the functions of a physical switch system.
- B . The virtual switch provides network connectivity between the virtual machine and the external network
- C . It is recommended to create independent management, storage and business virtual machines and divide them into different vlans
- D . The management virtual switch carries important messages such as management messages and virtual machine migration messages.
Correct Answer: ABCD
Question #20
Which of the following statements about configuring virtual switches is incorrect?
- A . The upstream port of the virtual switch allows all vlans to pass
- B . The virtual switch uses the vNer0 port of the virtual switch, and the port is configured with vlan 100. Then the physical switch port connected to the virtual switch must allow vlan 100 to pass, otherwise the virtual machine cannot communicate with the external network.
- C . When adding a virtual switch, you must bind a physical interface, and when binding multiple physical interfaces, you must configure link aggregation mode and load sharing mode.
- D . The storage virtual switch must be configured with an IP address, otherwise the CVK host cannot mount the IP through the storage virtual switch. san storage
Correct Answer: C
Question #21
Which of the following statements about storage resources is correct? (Multiple choice)
- A . Virtual machines can use storage resources in the form of block devices or files
- B . Two storage systems: defaultpool and ispool, of the local file directory type by default.
- C . Storage pool types include local file directories, LVM logical storage, iSCSI network storage, FC network storage, NFS network file storage, shared file storage and windows shared directories
- D . The identifier of the iSCSI storage adapter of the CVK host needs to be unique
- E . A block device is only allowed to be used by one virtual machine
Correct Answer: ABCDE
Question #22
Which of the following statements about shared files is correct? (Multiple choice)
- A . Shared file system types include iSCSI shared file system and FC shared file system
- B . A shared file system is not allowed to be mounted by hosts under different host pools at the same time.
- C . FC shared file system does not support FC multipath
- D . Multiple clusters under a host pool are not allowed to use the same shared file system
Correct Answer: AB
Question #23
Which of the following descriptions about virtual machines is correct? (Multiple choice)
- A . A virtual machine is a complete system running on a physical server. It contains its own virtual CPU, memory, disk box, network card and other virtual hard disk resources.
- B . The configuration file of the virtual machine defines the virtual hardware information of the virtual machine
- C . The virtual machine mainly includes configuration files and image files
- D . During the virtual startup process, the system time of the CVK host where the virtual machine is located will not be synchronized.
Correct Answer: ABC
Question #24
Which of the following statements about virtual devices of virtual machines is correct? (Multiple choice)
- A . The "custom" working mode of virtual CPU can provide optimal migration compatibility and optimal performance for virtual machines.
- B . When the virtual machine uses " virtio hard disk" or " virtio " network card, there is no need to install the virtio device driver.
- C . " virtio network card" has better performance than "ordinary network card". It is recommended to use " virtio network card"
- D . The virtual CPU of the virtual machine uses physical CPU resources through time slice polling.
Correct Answer: CD
Question #25
Which of the following descriptions of the virtual machine life cycle is correct? (Multiple choice)
- A . CAS Tools is not installed on the virtual machine, and there may be a problem that the virtual machine cannot be shut down when performing the shutdown operation.
- B . When the virtual machine is working normally, performing a power-off operation may cause the virtual machine operating system and application data to be lost, so it needs to be used with caution.
- C . During normal operation of the virtual machine, if the storage pool where the image file is located is full , the virtual machine will become suspended.
- D . After the virtual machine is moved to the recycle bin, it can be manually restored within the storage period. If the storage period expires, it will be automatically deleted.
Correct Answer: ABCD
Question #26
Which of the following statements about virtual machine templates is correct? (Multiple choice)
- A . A virtual machine template is a copy of a virtual machine and is used to easily create and configure multiple new virtual machines.
- B . The number of CPUs, memory size and storage capacity in the virtual machine template cannot be modified.
- C . Making a virtual machine template includes two methods: converting to a template and cloning to a template. Cloning to a template must be performed when the virtual machine is shut down.
- D . The virtual machine template is saved in the local directory "/ vms /templet" of the CVM host by default.
Correct Answer: AD
Question #27
Which of the following statements about virtual machine cloning is incorrect? (Multiple choice)
- A . Virtual machine cloning methods include normal cloning, fast cloning and full cloning.
- B . Cloning is only allowed within the same CVK host
- C . The cloned virtual machine has the same operating system, application system and data as the original virtual machine, and the MAC of the virtual network card is also the same.
- D . The IP address acquisition method of the cloned virtual machine defaults to DHCP, so there will be no address conflicts.
Correct Answer: BCD
Question #28
Which of the following about virtual machine migration is wrong?
- A . Virtual machine migration refers to manually migrating virtual machines to different hosts. Under data storage, offline migration and online migration are supported.
- B . Virtual machine migration includes changing the host, changing the storage, changing the host and storage
- C . When the virtual machine only changes the host, the destination host must be able to access the image file of the virtual machine.
- D . Changing the host and storage means migrating the virtual machine to another host and migrating the virtual machine image file to other storage on the host. Only offline migration is supported.
Correct Answer: D
Question #29
Which of the following statements about virtual machine online migration is correct? (Multiple choice)
- A . When migrating hosts and storage online, the memory data and image files of the virtual machine are transmitted through the management network.
- B . When migrating hosts and storage online, the memory data of the virtual machine is transmitted through the management network, and the image file is transmitted through the storage network.
- C . When migrating a host online, the virtual machine of the destination host is first sent off in a paused manner, and then the memory data of the original virtual machine is copied. Finally, the original virtual machine is shut down, and the virtual machine of the destination host changes from the paused state to the running state.
- D . When the migration is not completed within the migration timeout, the system will pause the original virtual machine so that it can quickly complete the migration. After the migration is completed, the virtual machine will be restored to the running state.
Correct Answer: ACD
Question #30
Which of the following descriptions of virtual machine high availability (HA) is correct? (Multiple choice)
- A . HA functionality provides easy-to-use, cost-effective high availability for applications running on all virtual machines in the cluster
- B . After turning on the HA function, CVM will continue to monitor the running status of all server hosts and virtual machines in the cluster. When a host or virtual machine fails, CVM will respond immediately and start all affected hosts on other available hosts in the cluster. virtual machine
- C . After the HA function is enabled in the cluster, all hosts in the cluster are required to mount the system shared storage.
- D . After the cluster enables the HA function, all virtual machines under the cluster have HA enabled, and the HA function of a single virtual machine cannot be turned off.
Correct Answer: ABC