Question at position 46 Indexes generally slow down access speed in most RDBMS.TrueFalseSingle choice
A
True
B
False

Question

Question at position 46 Indexes generally slow down access speed in most RDBMS.TrueFalse

BlackTom AI · Accepted Answer

This question asks whether indexes typically slow down access speed in most RDBMS, with True/False options.
Option 1: True. If you say indexes slow things down, you are ignoring that the primary purpose of an index is to speed up data retrieval by providing a structured path to rows. In many scenarios, an index allows the database to locate rows without scanning the entire table, which reduces I/O and improves performance. The statement is therefore misleading or incorrect in common practice.
Option 2: False. This option aligns with the standard understanding that indexes are designed to accelerate lookups, range queries, and join operations by enabling the query optimizer to use efficient access paths. While there is some overhead on write operations (inserts/updates/deletes) due to maintaining the index, read access speed is typically improved when an appropriate index is present.
Common misconceptions addressed: Some may think any indexing adds overhead everywhere, but the key distinction is between read performance and write overhead. The benefit for read-heavy workloads usually outweighs the slight write cost, and missing indexes can cause full table scans which are far slower than using an index.
Nuanced note: In certain edge cases, if an index is poorly chosen, oversized, or rarely matches a query pattern, it might not provide a speedup and could be considered detrimental for that specific workload. However, that does not change the general rule that well-chosen indexes speed up access in most RDBMS scenarios.
In summary, the statement claiming indexes generally slow down access speed is contradicted by the primary purpose and typical effect of indexing on query performance.

Question at position 46 Indexes generally slow down access speed in most RDBMS.TrueFalseSingle choice

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