DELL-EMC DES-1721 Specialist – Implementation Engineer, SC Series Exam Free Practice Test — 30 Questions

Question 1

In a data storage environment, a company is evaluating different encryption options to secure sensitive customer information. They are considering the use of AES (Advanced Encryption Standard) with a 256-bit key length, RSA (Rivest-Shamir-Adleman) for key exchange, and a hybrid encryption approach that combines both AES and RSA. Given the need for both confidentiality and efficient key management, which encryption strategy would provide the best balance of security and performance for the company\'s requirements?

Accepted Answer

A hybrid encryption approach that uses AES for data encryption and RSA for secure key exchange.

Question 2

A data center is planning to upgrade its storage infrastructure by adding a new SC Series storage array. The installation requires careful consideration of power requirements, cooling needs, and network connectivity. If the new array has a power consumption of 1500 watts and the data center operates at a power efficiency ratio (PUE) of 1.5, what is the total power consumption that needs to be accounted for in the data center\'s power budget? Additionally, if the cooling system is designed to operate at 30% of the total power consumption, what is the cooling power requirement in watts?

Accepted Answer

1950 watts

Question 3

A data center is experiencing performance issues with its storage system, leading to increased latency and reduced throughput. The storage administrator decides to monitor the performance metrics of the storage array to identify bottlenecks. After analyzing the metrics, the administrator observes that the average I/O response time is 15 ms, the throughput is 200 MB/s, and the average queue depth is 10. If the administrator wants to calculate the IOPS (Input/Output Operations Per Second) based on these metrics, which of the following calculations would yield the correct IOPS value?

Accepted Answer

$IOPS = \frac{Throughput}{Average I/O Response Time} = \frac{200 	ext{ MB/s}}{15 	ext{ ms}} 	imes 1000$

Question 4

In a data storage environment, a company is utilizing snapshots and clones to manage their data efficiently. They have a primary volume of 1 TB that is being used for critical applications. The company decides to create a snapshot of this volume every hour and retains each snapshot for 24 hours. Additionally, they create a clone of the volume for testing purposes, which is expected to consume 50% of the original volume\'s space. If the company has a total of 10 TB of storage available, how much storage will be consumed by the snapshots after 24 hours, and how much total storage will be used after creating the clone?

Accepted Answer

2 TB

Question 5

A company is implementing a new data protection strategy for its critical databases, which contain sensitive customer information. The strategy involves a combination of full backups, incremental backups, and replication to a remote site. The company needs to ensure that it can recover its data within a Recovery Time Objective (RTO) of 4 hours and a Recovery Point Objective (RPO) of 1 hour. If the company performs full backups every Sunday, incremental backups every day from Monday to Saturday, and replication occurs every hour, what is the maximum amount of data that could be lost in the event of a failure occurring on a Wednesday at 3 PM?

Accepted Answer

1 hour of data

Question 6

In a data center environment, a company is experiencing performance issues with its storage systems. The IT team decides to analyze the performance metrics and support resources available for their SC Series storage systems. They find that the average response time for I/O operations is 15 ms, and they want to determine the maximum I/O operations per second (IOPS) that can be achieved if they aim for a target response time of 10 ms. Given that IOPS can be calculated using the formula:

Accepted Answer

ext{IOPS} = \frac{1}{	ext{Response Time (in seconds)}} $$

Question 7

A company is planning to install a new storage management software on their SC Series storage system. The installation requires a minimum of 16 GB of RAM and 4 CPU cores to function optimally. The IT team has a server with 32 GB of RAM and 8 CPU cores available. However, they also need to ensure that the server can handle additional workloads without performance degradation. If the installation of the software consumes 50% of the available RAM and 40% of the CPU resources, what will be the remaining resources after the installation, and will the server still be able to accommodate additional workloads if they require at least 8 GB of RAM and 2 CPU cores?

Accepted Answer

Remaining resources: 16 GB RAM and 4 CPU cores; Yes, it can accommodate additional workloads.

Question 8

A company is conducting an audit of its storage system to ensure compliance with data retention policies and to assess the efficiency of its data management practices. During the audit, the team discovers that the average data retrieval time for archived data is 15 seconds, while the industry standard is 10 seconds. Additionally, they find that 25% of the archived data has not been accessed in over two years. If the company has a total of 10 TB of archived data, how much data (in TB) has not been accessed in the specified timeframe, and what implications does this have for their data management strategy?

Accepted Answer

2.5 TB

Question 9

A company is evaluating the performance of its SC Series storage solutions to determine the optimal configuration for its virtualized environment. They have a workload that requires a minimum of 10,000 IOPS (Input/Output Operations Per Second) and a latency of less than 5 milliseconds. The company is considering three different configurations: a hybrid model with SSDs and HDDs, a fully SSD-based model, and a fully HDD-based model. Given that the hybrid model can achieve 8,000 IOPS with a latency of 6 milliseconds, the fully SSD model can achieve 15,000 IOPS with a latency of 2 milliseconds, and the fully HDD model can achieve 4,000 IOPS with a latency of 10 milliseconds, which configuration would best meet the company\'s requirements?

Accepted Answer

Fully SSD-based model

Question 10

In a scenario where a company is deploying a new SC Series storage system, the IT team needs to configure the operating system to optimize performance for a virtualized environment. They are considering various settings for the storage pool, including RAID levels, block sizes, and the number of disks in each pool. If the team decides to use a RAID 10 configuration with 16 disks, what would be the effective usable capacity of the storage pool if each disk has a capacity of 1 TB? Additionally, how does the choice of block size impact the performance of the virtual machines running on this storage system?

Accepted Answer

8 TB usable capacity with improved performance for small I/O operations

Question 11

A data center is planning to install a new rack that will house multiple storage arrays. The rack has a height of 42U and needs to accommodate 5 storage arrays, each requiring 6U of space. Additionally, the installation must consider the weight distribution, as the total weight of the arrays is 800 kg. The rack can support a maximum weight of 1000 kg. What is the maximum number of additional 1U network switches that can be installed in the rack without exceeding the weight limit, assuming each switch weighs 5 kg?

Accepted Answer

20

Question 12

A company is designing a storage pool for its new data center, which will host a mix of high-performance databases and archival data. The storage pool will consist of 12 disks, each with a capacity of 2 TB. The company wants to ensure that the storage pool can withstand the failure of two disks while maintaining data availability. Which RAID configuration should the company implement to achieve this goal while optimizing for performance and capacity?

Accepted Answer

RAID 6

Question 13

In a data center environment, a storage administrator is tasked with integrating a new SC Series storage array with existing VMware hosts. The administrator needs to ensure optimal performance and availability while configuring the storage. The storage array supports multiple protocols, including iSCSI and Fibre Channel. The administrator decides to implement a multipathing strategy to enhance redundancy and load balancing. Which of the following configurations would best achieve these goals while adhering to best practices for integration with VMware hosts?

Accepted Answer

Configure iSCSI with multiple paths to the storage array using the VMware Native Multipathing (NMP) and set the path selection policy to "Round Robin."

Question 14

A company is experiencing performance issues with its storage system, which is running on a software version that has been identified as having several known bugs. The IT team is considering whether to upgrade to the latest software version or to apply a patch to the current version. They need to evaluate the potential impact of each option on system performance and data integrity. What should the team prioritize in their decision-making process regarding software issues?

Accepted Answer

Assessing the compatibility of the new software version with existing hardware and applications

Question 15

A storage administrator is tasked with configuring a new SC Series storage array to optimize performance for a database application that requires high IOPS (Input/Output Operations Per Second). The administrator decides to implement a RAID configuration that balances performance and redundancy. Given the requirement for at least 4TB of usable capacity and the need for a minimum of 6 drives, which RAID level should the administrator choose to achieve the best performance while ensuring data protection?

Accepted Answer

RAID 10

Question 16

A company is planning to upgrade its storage infrastructure to accommodate a projected increase in data usage over the next three years. Currently, the storage system has a capacity of 100 TB, and the data growth rate is estimated at 25% per year. If the company wants to ensure that they have enough capacity to handle the increased data load for the next three years, what should be the minimum storage capacity they should plan for at the end of this period?

Accepted Answer

244.14 TB

Question 17

A company is experiencing intermittent connectivity issues with its SC Series storage system, which is impacting the performance of its applications. The IT team has identified that the problem may be related to the network configuration. They are considering several potential resolutions. Which approach should they prioritize to effectively diagnose and resolve the connectivity issues?

Accepted Answer

Conduct a thorough analysis of the network topology and verify the configuration settings of all switches and routers involved in the storage network.

Question 18

A data center is experiencing performance issues with its storage system, particularly with latency during peak usage hours. The storage team has identified that the average latency during these hours is 25 ms, while the acceptable threshold for latency is 15 ms. To address this, they decide to analyze the I/O operations per second (IOPS) and the throughput of the storage system. If the current IOPS is 5000 and the average block size is 8 KB, what is the throughput in MB/s? Additionally, if the team wants to achieve a target latency of 10 ms, what IOPS would be required, assuming the same block size?

Accepted Answer

40 MB/s; 8000 IOPS

Question 19

A data center is experiencing intermittent connectivity issues with its SC Series storage system. The IT team has identified that the problem occurs during peak usage hours, leading to performance degradation. They suspect that the issue may be related to the network configuration or bandwidth limitations. Which of the following actions should the team prioritize to diagnose and resolve the issue effectively?

Accepted Answer

Analyze the network traffic patterns and bandwidth utilization during peak hours to identify potential bottlenecks.

Question 20

A data center is experiencing performance issues with its storage system, leading to increased latency and reduced throughput. The storage administrator decides to analyze the performance metrics of the storage array. If the average response time for read operations is measured at 15 milliseconds and the average response time for write operations is 25 milliseconds, what is the overall average response time for both read and write operations combined? Additionally, if the total number of read operations is 2000 and the total number of write operations is 1000, how does this affect the overall performance metric when calculating the weighted average response time?

Accepted Answer

18.33 milliseconds

Question 21

A company is planning to implement a new SC Series storage system to enhance its data management capabilities. During the installation phase, the IT team must configure the storage system to optimize performance for a virtualized environment. The team decides to allocate storage resources based on the IOPS (Input/Output Operations Per Second) requirements of their applications. If the total IOPS requirement for the applications is 10,000 and the storage system can provide a maximum of 2,500 IOPS per drive, how many drives must be allocated to meet the IOPS requirement? Additionally, the team must ensure that they configure the RAID level to provide redundancy without significantly impacting performance. Which RAID configuration would be most suitable for balancing performance and redundancy in this scenario?

Accepted Answer

RAID 10

Question 22

In a scenario where a storage administrator is tasked with optimizing the performance of an SC Series storage system using Unisphere, they notice that the read and write IOPS (Input/Output Operations Per Second) are not meeting the expected performance benchmarks. The administrator decides to analyze the workload distribution across the storage pools. If the total IOPS capacity of the system is 10,000 IOPS and the administrator observes that the read IOPS are currently at 6,000 IOPS, what is the percentage of write IOPS being utilized, assuming that the total IOPS is fully utilized?

Accepted Answer

0.4

Question 23

A company is designing a storage pool for its new data center, which will host a mix of high-performance databases and archival data. The storage pool will consist of 12 disks, each with a capacity of 2 TB. The company wants to ensure that the storage pool can withstand the failure of two disks while maintaining data availability. Which RAID configuration should the company implement to achieve this goal while optimizing for performance and capacity?

Accepted Answer

RAID 6

Question 24

A company is planning to upgrade its storage system to enhance performance and reliability. The current system is running on an outdated version of the software that has known vulnerabilities. The IT team has identified a new version that not only addresses these vulnerabilities but also introduces advanced features such as automated tiering and improved data deduplication. However, the upgrade process requires careful planning to minimize downtime and ensure data integrity. What is the most critical step the IT team should take before proceeding with the software upgrade?

Accepted Answer

Conduct a comprehensive backup of all data and configurations

Question 25

A company is implementing a data protection strategy for its critical business applications. They have a total of 10 TB of data that needs to be backed up. The company decides to use a combination of full backups and incremental backups to optimize storage and reduce backup windows. If they perform a full backup every 4 weeks and incremental backups every week, how much data will they have backed up after 12 weeks? Assume that each incremental backup captures 10% of the total data since the last full backup.

Accepted Answer

30 TB

Question 26

In a scenario where a company is integrating a new SC Series storage system with its existing VMware environment, the IT team needs to ensure optimal performance and data availability. They decide to implement a multipath I/O (MPIO) configuration to enhance the storage connectivity. Given that the storage system supports both Round Robin and Fixed path selection policies, which configuration would best ensure load balancing and fault tolerance in this environment?

Accepted Answer

Implement Round Robin path selection for all datastores to distribute I/O evenly across all available paths.

Question 27

A company is evaluating the performance of their SC Series storage solutions in a virtualized environment. They have a workload that requires a consistent IOPS (Input/Output Operations Per Second) performance of 10,000 IOPS for their database applications. The storage system is configured with a mix of SSDs and HDDs, and the company is considering implementing a tiered storage strategy to optimize performance and cost. If the SSDs can provide 20,000 IOPS and the HDDs can provide 5,000 IOPS, what is the minimum number of SSDs and HDDs required to meet the workload demand while ensuring that the total IOPS does not exceed 30,000 IOPS?

Accepted Answer

1 SSD and 2 HDDs

Question 28

In a data center, a company is planning to implement a new storage enclosure for their SC Series storage system. The enclosure is designed to hold 24 drives, and the company wants to ensure optimal performance and redundancy. They decide to configure the drives in a RAID 10 setup. If each drive has a capacity of 1 TB, what will be the total usable capacity of the storage enclosure after accounting for RAID overhead? Additionally, if the company plans to use 4 drives for hot spares, how many drives will be available for data storage, and what will be the total usable capacity in TB?

Accepted Answer

10 TB usable capacity with 20 drives available for data storage

Question 29

A storage administrator is tasked with configuring a storage pool and creating LUNs for a new application that requires high performance and redundancy. The storage system has a total of 20 disks, each with a capacity of 1 TB. The administrator decides to create a RAID 10 configuration for the storage pool to achieve both performance and redundancy. If the administrator wants to allocate 60% of the total storage capacity to LUNs, how much usable storage will be available for LUNs after the RAID configuration is applied?

Accepted Answer

6 TB

Question 30

A company is planning to implement a new storage solution for its data center, which currently has a total of 200 TB of data. The company anticipates a growth rate of 20% per year for the next three years. They want to ensure that the storage solution can accommodate this growth without requiring immediate upgrades. If the storage solution has a usable capacity of 80% after accounting for redundancy and overhead, what is the minimum storage capacity (in TB) that the company should provision for the new solution?

Accepted Answer

300 TB

DELL-EMC DES-1721 Specialist – Implementation Engineer, SC Series Exam Free Practice Test — 30 Questions

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