D-ISM-FN-02 Exam Questions & Answers
Dell Information Systems and Management Foundations • Dell
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Sample D-ISM-FN-02 Questions
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An organization wants to consume compute, network, and storage resources through a self-service portal. Which cloud service model provides this capability?
Infrastructure as a Service (IaaS) is a cloud computing model that provides virtualized computing resources over the internet. It offers fundamental infrastructure services such as compute, storage, and networking, which users can provision and manage through a self-service portal. This model allows organizations to scale resources as needed and pay only for what they use.
A company is experiencing slow write performance on its RAID 6 array. What is the most likely cause of this performance bottleneck?
RAID 6 uses dual parity to provide fault tolerance, which requires additional calculations during write operations. This introduces a write penalty, as the system must compute and write two sets of parity data for each write operation, leading to slower write performance compared to other RAID levels.
Insufficient storage on the RAID controller: Would affect storage capacity, not write performance.
High read I/O load on the array: Impacts read performance, not write performance.
Increased network latency: Affects data transfer times but not the internal write operations of the RAID array.
Write penalty associated with dual parity calculations: The most likely cause of slow write performance in RAID 6.
A company is concerned about the risk of data loss due to accidental deletion and hardware failures. What is the primary reason for implementing a data backup solution?
The primary purpose of a data backup solution is to maintain business continuity by ensuring data can be restored in case of accidental deletion, hardware failure, or data corruption.
Not to reduce storage costs: Archiving and tiering handle that.
Not to improve application performance: Backup processes typically don't enhance live performance.
Not to reduce archive usage: Backup and archive have different use cases.
What is a read miss in cache operations?
A read miss occurs when the data requested by the host is not available in the cache. As a result, the storage system must fetch the data from the slower disk storage (back-end), leading to higher latency.
Cache hit: Data is already in cache faster response.
Cache miss (read miss): Data not in cache fetched from the disk.
A company needs to rebuild a failed disk in its RAID 5 array. Which two factors would significantly impact the rebuild time?
Rebuilding a RAID 5 array after a disk failure depends on:
Capacity of the failed disk (C) -- More data means longer rebuild time.
Write performance of the remaining disks (B) -- Rebuild involves recalculating parity and writing data to the replacement disk, which stresses the surviving disks.
Network bandwidth (A) is only relevant for accessing the array, not for internal rebuild operations.
Cache capacity (D) helps performance in some scenarios, but the direct factors are disk size and performance.
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