F5
101 · Question #433
101 Question #433: Real Exam Question with Answer & Explanation
The correct answer is B: The ARX index contains the index keys in sorted order, with the leaf level of the index containing. The ARX index uses a sorted B-tree structure with data at the leaf level, and is fully disposable - it can be rebuilt from the underlying storage at any time without client disruption.
Question
Which two of the following statements are accurate descriptions of the ARX index? (Choose two.)
Options
- AThe ARX index stores the bulk of its data as bit arrays and answers most questions by performing
- BThe ARX index contains the index keys in sorted order, with the leaf level of the index containing
- CThe ARX index is the key enabler of transparent data mobility because the ARX tracks where files
- DThe ARX index is 100% disposable and can be rebuilt at any point in time without disrupting client
Explanation
The ARX index uses a sorted B-tree structure with data at the leaf level, and is fully disposable - it can be rebuilt from the underlying storage at any time without client disruption.
Common mistakes.
- A. Describing the ARX index as storing bulk data as bit arrays is inaccurate - the ARX uses a sorted key-based index structure rather than bitmap representations.
- C. While the ARX does track file locations, characterizing the index alone as the 'key enabler' of transparent data mobility is inaccurate because transparency is achieved by the ARX system as a whole, including its namespace virtualization layer, not the index in isolation.
Concept tested. F5 ARX index structure, B-tree design, and disposability
Reference. https://support.f5.com/csp/knowledge-center/software/ARX
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