SF-Data-Arch Large Data Volume Considerations Practice Question
When designing a system for LDV, what is the role of an 'Indexed Field'?
⚠ Common exam trap
Test-takers frequently assume that creating an index will automatically speed up every type of query, ignoring that indexes only help specific filter conditions and can actually degrade write performance.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
To speed up the retrieval of records by narrowing search space.
Indexes are structures that the database uses to find records quickly without scanning the entire table. In an LDV environment, they are the primary defense against query timeouts. By ensuring that frequently used filters in SOQL queries are indexed, architects can significantly reduce the amount of data the database engine must process, keeping performance within acceptable levels regardless of the total record count.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
To increase storage capacity in the Salesforce database.
Why it's wrong here
Indexes actually consume more storage space, not less. The purpose of an index is to improve read performance at the cost of additional storage overhead and slightly slower write operations, as the index must be updated whenever a record is modified or inserted into the database.
- ✓
To speed up the retrieval of records by narrowing search space.
Why this is correct
Indexes function like a book index, allowing the database to jump straight to the data rows that match the filter criteria. This eliminates the need for full table scans, which are prohibitively slow on tables with millions of records, and is vital for maintaining responsive application performance.
- ✗
To enforce uniqueness constraints on every custom field.
Why it's wrong here
While indexes can be used to support unique constraints, that is not their primary purpose in an LDV context. Many indexed fields are not unique. The main goal of indexing in large datasets is to optimize query performance, not to enforce data uniqueness or integrity constraints.
- ✗
To automate the conversion of records to external objects.
Why it's wrong here
Indexing has no relationship to Salesforce Connect or external objects. It is a feature strictly for the internal Salesforce database. It does not automate any aspect of data migration or external integration; it is solely an optimization technique for the data already residing within the Salesforce platform.
About these practice questions
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official Salesforce exam blueprint
This SF-Data-Arch practice question is part of Courseiva's free Salesforce certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the SF-Data-Arch exam.