This SNOW-CAD practice question tests your understanding of creating and customizing tables and data. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A company has a custom table 'u_employee' with fields: 'first_name', 'last_name', 'department'. They want to create a unique index on the combination of 'last_name' and 'department' to prevent duplicate entries. Where should this index be defined?
In the table schema map
Why wrong: Schema maps are for integration, not indexing.
In the table's dictionary record via the Indexes related list
Indexes are added to the table's dictionary.
In the dictionary entry for each field
Why wrong: Indexes are not defined per field.
In the sys_dictionary table directly
Why wrong: sys_dictionary stores field definitions, not indexes.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
In the table's dictionary record via the Indexes related list
In ServiceNow, a unique index on a custom table is defined in the table's dictionary record via the Indexes related list. This is the correct location because ServiceNow uses the table's dictionary metadata to manage indexes, and the Indexes related list allows you to specify unique constraints directly on the table definition, ensuring the database enforces uniqueness on the combination of 'last_name' and 'department'.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
In the table schema map
Why it's wrong here
Schema maps are for integration, not indexing.
In the table's dictionary record via the Indexes related list
Why this is correct
Indexes are added to the table's dictionary.
Related concept
Read the scenario before looking for a memorised answer.
In the dictionary entry for each field
Why it's wrong here
Indexes are not defined per field.
In the sys_dictionary table directly
Why it's wrong here
sys_dictionary stores field definitions, not indexes.
Common exam traps
The trap here is that candidates often confuse field-level dictionary entries (Option C) with table-level index configuration, mistakenly thinking a unique constraint can be set on individual field dictionary records rather than through the table's Indexes related list.
Detailed technical explanation
Under the hood, ServiceNow translates index definitions from the table's dictionary record into actual database DDL (e.g., CREATE UNIQUE INDEX) when the table is created or migrated. The Indexes related list allows you to specify composite indexes, which are critical for enforcing business rules like preventing duplicate employee records across departments. A real-world scenario: without this unique index, a user could insert two employees with the same last name in the same department, leading to data duplication that would require manual cleanup.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Creating and customizing tables and data — study guide chapter
Learn the concepts, then practise the questions
Creating and customizing tables and data practice questions
Targeted practice on this topic area only
All SNOW-CAD questions
500 questions across all exam domains
ServiceNow Certified Application Developer CAD study guide
Full concept coverage aligned to exam objectives
SNOW-CAD practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Practise SNOW-CAD questions linked to Working with Data.
Practise SNOW-CAD questions linked to Platform Features and Integration.
Practise SNOW-CAD questions linked to Integrating and managing application data.
Practise SNOW-CAD questions linked to Automating application logic with business rules and scripts.
Practise SNOW-CAD questions linked to Application development using ServiceNow Studio.
Practise SNOW-CAD questions linked to Creating and customizing tables and data.
Practise SNOW-CAD questions linked to Designing interfaces and user experiences.
Practise SNOW-CAD questions linked to Core Application Development.
Practise SNOW-CAD questions linked to User Interface Development.
Practise SNOW-CAD questions linked to SNOW-CAD fundamentals.
Practise SNOW-CAD questions linked to SNOW-CAD scenario.
Practise SNOW-CAD questions linked to SNOW-CAD troubleshooting.
Practice this exam
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Creating and customizing tables and data — This question tests Creating and customizing tables and data — Read the scenario before looking for a memorised answer..
The correct answer is: In the table's dictionary record via the Indexes related list — In ServiceNow, a unique index on a custom table is defined in the table's dictionary record via the Indexes related list. This is the correct location because ServiceNow uses the table's dictionary metadata to manage indexes, and the Indexes related list allows you to specify unique constraints directly on the table definition, ensuring the database enforces uniqueness on the combination of 'last_name' and 'department'.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Keep practising
Last reviewed: Jun 11, 2026
This SNOW-CAD practice question is part of Courseiva's free ServiceNow 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 SNOW-CAD exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.