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NCSE-Core Practice Questions

Question # 1
An administrator is managing a highly active SQL workload that is writing I/Os in 2 MB chunks to a vDisk. The administrator wants to optimize capacity setting for the computer. Which storage optimization technology should the administration select to meet these requirement?
A. Erasure Coding
B. Compression
C. Capacity Deduplication
D. Cache Deduplication


B. Compression

Explanation:

For highly active SQL workloads that write I/Os in 2 MB chunks to a vDisk, compression is the most suitable storage optimization technology. Compression works well with larger I/O sizes and can significantly reduce the storage footprint, providing better capacity optimization. This approach ensures that the large chunks of data are compressed efficiently, maximizing storage utilization and performance.

Question # 2
A prospect is seeking a Nutanix solution for a mission critical application that needs to sustain two simultaneous node outages and prefers that the cluster be able to fully rebuild both data and metadata in the event hardware issues. what is the minimum number of nodes required for the cluster?
A. 4
B. 5
C. 6
D. 7


C. 6

A prospect is looking for a Nutanix solution for a mission-critical application that needs to sustain two simultaneous node outages and prefers the cluster to fully rebuild both data and metadata in the event of hardware issues. Here is the detailed explanation:

Requirement Analysis:

Sustain two simultaneous node outages.

Fully rebuild both data and metadata after hardware issues.

Feature Analysis:

Nutanix clusters use Replication Factor (RF) to ensure data protection and availability. For RF3 (Replication Factor 3), which protects against two simultaneous node failures, a minimum of 5 nodes is required.

To fully rebuild both data and metadata after failures, the system needs an additional node to ensure there is enough redundancy and performance.

Conclusion:To achieve RF3 and sustain two simultaneous node failures while allowing full rebuild of data and metadata, a minimum of 6 nodes is required.

References:

Nutanix documentation on cluster resiliency and RF configurations


Question # 3
what information can be gathered about the configuration of the VM storage?
A. Majority of VMs are Thin Provisioned.
B. Storage capacity is a problem
C. VMs have many disks.
D. Total disk usage is high


A. Majority of VMs are Thin Provisioned.

Explanation:

When gathering information about the configuration of VM storage, it is important to understand the provisioning type of the disks. Thin provisioning allows more efficient use of storage by allocating disk space dynamically based on actual usage rather than pre-allocating the entire disk size. The majority of VMs being thin provisioned indicates a strategy to optimize storage utilization and capacity management.

References:

Nutanix Bible


Question # 4
An administrator is auditing the recent alerts on the cluster to report to the management. Which dashboard in Prism Central can be used to generate this report?
A. Alerts
B. Explore
C. Apps
D. Analysis


A. Alerts

Explanation:

In Prism Central, the Alerts dashboard is used to audit recent alerts on the cluster. This dashboard provides detailed information on all the alerts, their severity, status, and occurrences, allowing the administrator to generate comprehensive reports for management.


Question # 5
An administrator has an existing cluster and needs to improve performance Which two items are required to achieve even greater performance?

A. Workloads are multi-threaded
B. VMs have one vCPU configured
C. VMs have multi-queue disable
D. VMs have more than one vCPU


A. Workloads are multi-threaded

D. VMs have more than one vCPU

Explanation:

Understanding the Requirements:

To improve the performance of an existing Nutanix cluster, it's important to consider the nature of the workloads and the configuration of the virtual machines (VMs).

Workloads are Multi-threaded (Option A):

Multi-threaded workloads can take advantage of multiple CPU cores, which helps in parallel processing and improves overall performance.

Nutanix clusters benefit from workloads that can efficiently utilize multiple threads since the underlying hypervisor (AHV or ESXi) can allocate multiple vCPUs to VMs, enhancing their performance capabilities.

VMs have more than one vCPU (Option D):

Assigning more than one vCPU to VMs allows them to process multiple instructions simultaneously, leveraging the multi-core capabilities of the physical CPUs.

This configuration is particularly beneficial for performance-sensitive applications that require more computing power and can significantly improve the performance of VMs on the Nutanix cluster. Analysis of Other Options:

Option B: VMs have one vCPU configured:

This option limits the VMs to a single CPU core, which can bottleneck performance for multi-threaded applications and is not optimal for performance improvement.

Option C: VMs have multi-queue disable:

Disabling multi-queue can reduce the network performance by limiting the ability of the VMs to handle multiple network queues, which can be detrimental to performance.

Conclusion:

Therefore, to achieve greater performance, ensuring that workloads are multi-threaded and VMs are configured with more than one vCPU are the optimal strategies.

References:

Nutanix documentation emphasizes the importance of configuring VMs with multiple vCPUs and supporting multi-threaded workloads to maximize performance in Nutanix clusters.


Question # 6
An administrator is managing a highly active SQL workload that is writing I/Os in 2 MB chunks to a vDisk. The administrator wants to optimize capacity setting for the computer. Which storage optimization technology should the administration select to meet these requirement?
A. Erasure Coding
B. Compression
C. Capacity Deduplication
D. Cache Deduplication


B. Compression

Explanation:

For highly active SQL workloads that write I/Os in 2 MB chunks to a vDisk, compression is the most suitable storage optimization technology. Compression works well with larger I/O sizes and can significantly reduce the storage footprint, providing better capacity optimization. This approach ensures that the large chunks of data are compressed efficiently, maximizing storage utilization and performance.


Question # 7
Which option should be recommended for a customer to get timely notification of significant product issues in the field.
A. Visit the Nutanix.com website.
B. Open Prism Element > Gear Icon Menu > Field Advisories.
C. Visit the portal.nutanix.com website > Documentation tab > Security Advisories.
D. Register for Field Advisories email notifications.


D. Register for Field Advisories email notifications.

Explanation:

To get timely notifications of significant product issues, customers should register for Field Advisories email notifications. This ensures that they receive updates directly and promptly, keeping them informed about any critical issues or advisories related to Nutanix products.

References:

Nutanix support resources and customer documentation provide guidance on how to register for email notifications for Field Advisories, ensuring customers are kept up to date with important product information.

Question # 8
A customer is evaluating Nutanix to replace their existing 200TB filer. The filer is used to store archived images. To achieve maximum storage density. RF2 and Erasure Coding are proposed. What is the minimum number of nodes required to support the maximum Erasure Coding stripe size of 4/1 (data/parity)?
A. 4 Nodes
B. 5 Nodes
C. 6 Nodes
D. 7 Nodes


B. 5 Nodes

Explanation:

Problem Analysis:

The customer needs to replace an existing 200TB filer with a Nutanix solution.

The filer is used for storing archived images, requiring maximum storage density.

The proposal includes using RF2 and Erasure Coding with a stripe size of 4/1 (data/parity).

Erasure Coding Requirements:

Erasure Coding (EC-X) in Nutanix improves storage efficiency by distributing data and parity across multiple nodes.

A 4/1 stripe size means 4 data blocks and 1 parity block.

To implement a 4/1 Erasure Coding stripe, a minimum of 5 nodes is required to ensure the distribution of data and parity blocks.

Explanation:

RF2 (Replication Factor 2): Requires at least two copies of the data to be stored on different nodes.

Erasure Coding with a 4/1 Stripe: Requires 5 nodes to ensure there are enough blocks to store the 4 data and 1 parity blocks.

Outcome:

The minimum number of nodes required to support the maximum Erasure Coding stripe size of 4/1 is 5 nodes.

References:

For more detailed information, refer to the Nutanix documentation on Erasure Coding and storage policies.


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