The correct answer is that business rules on the User table do not fire on child table records. This is because ServiceNow business rule inheritance is not automatic; a rule defined on a parent table only executes for records on that specific table unless the "Inherited" checkbox is explicitly enabled on the rule's condition tab. When you extend a table, like creating 'u_staff' from User, the child table inherits the schema and data but not the business logic by default. This concept is a frequent trap on the ServiceNow Certified Application Developer CAD exam, testing your understanding of table hierarchy and rule scoping—many candidates mistakenly assume parent rules cascade down. A common memory tip is "parent rules stay home unless invited," meaning you must manually check "Inherited" for the rule to fire on child tables.
SNOW-CAD Creating and customizing tables and data Practice Question
This SNOW-CAD practice question tests your understanding of creating and customizing tables and data. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 ServiceNow instance has a custom table 'u_staff' extended from the User table. A business rule on the 'User' table updates the 'Active' field. When updating a user record, the business rule does not fire for records in 'u_staff'. What is the most likely reason?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
The user does not have permission to run business rules on the 'u_staff' table
Why wrong: Business rules run with system privileges; permissions are not a factor for execution.
B
Business rules on the User table do not fire on child table records
By default, business rules on a base table do not extend to child tables. You must set the 'Inherited' checkbox on the business rule to fire on child records.
C
The business rule has a condition that only allows running on User table records
Why wrong: Even without a condition, business rules on the User table do not automatically fire on child tables.
D
The business rule ordering is set too low and is being skipped
Why wrong: Ordering affects sequence, not whether the rule fires on child tables.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Business rules on the User table do not fire on child table records
Option C is correct because Business rules on a parent table do not automatically fire on child table records unless specifically set to. Option A is wrong because business rules on User will not fire on activities on child tables unless configured. Option B is wrong because the condition can check both. Option D is wrong because ordering does not prevent firing.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
The user does not have permission to run business rules on the 'u_staff' table
Why it's wrong here
Business rules run with system privileges; permissions are not a factor for execution.
✓
Business rules on the User table do not fire on child table records
Why this is correct
By default, business rules on a base table do not extend to child tables. You must set the 'Inherited' checkbox on the business rule to fire on child records.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The business rule has a condition that only allows running on User table records
Why it's wrong here
Even without a condition, business rules on the User table do not automatically fire on child tables.
✗
The business rule ordering is set too low and is being skipped
Why it's wrong here
Ordering affects sequence, not whether the rule fires on child tables.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the SNOW-CAD exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which SNOW-CAD exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Creating and customizing tables and data — This question tests Creating and customizing tables and data — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Business rules on the User table do not fire on child table records — Option C is correct because Business rules on a parent table do not automatically fire on child table records unless specifically set to. Option A is wrong because business rules on User will not fire on activities on child tables unless configured. Option B is wrong because the condition can check both. Option D is wrong because ordering does not prevent firing.
What should I do if I get this SNOW-CAD question wrong?
Identify which SNOW-CAD exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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