Question 312 of 520

UI, Navigation and Forms →easyMultiple SelectObjective-mapped

ServiceNow: How to Make a Field Read-Only Using UI Policy and Dictionary

This SNOW-CSA practice question tests your understanding of ui, navigation and forms. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.

Which TWO methods allow an administrator to make a field read-only on a form? (Choose two.)

A
Configure the form layout to hide the field
Why wrong: Hiding removes it, not make read-only.
B
Create an ACL that denies write access
Why wrong: ACL would prevent writing but the field may still appear editable.
C
Create a UI policy that sets the field to read-only when a condition is true
UI policy can change state dynamically.
D
Set the field attribute to 'Read only' in dictionary entry
This forces the field to be read-only always.
E
Add the field to a related list
Why wrong: Related lists are for related records, not field state.

Full breakdown with real-world context →

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

✓

Create a UI policy that sets the field to read-only when a condition is true

Option C is correct because a UI policy can dynamically set a field to read-only based on a specified condition, such as a particular state or value. This allows administrators to control field editability at runtime without permanently altering the field's definition. Option D is correct because setting the 'Read only' attribute in the dictionary entry makes the field read-only globally across all forms and views, providing a static, system-wide restriction.

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.

✗
Configure the form layout to hide the field
Why it's wrong here
Hiding removes it, not make read-only.
✗
Create an ACL that denies write access
Why it's wrong here
ACL would prevent writing but the field may still appear editable.
✓
Create a UI policy that sets the field to read-only when a condition is true
Why this is correct
UI policy can change state dynamically.
Related concept
Read the scenario before looking for a memorised answer.
✓
Set the field attribute to 'Read only' in dictionary entry
Why this is correct
This forces the field to be read-only always.
Related concept
Read the scenario before looking for a memorised answer.
✗
Add the field to a related list
Why it's wrong here
Related lists are for related records, not field state.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates often confuse ACLs (which control write access at the data layer) with UI policies (which control field editability at the presentation layer), leading them to incorrectly select option B as a method to make a field read-only on a form.

Detailed technical explanation

How to think about this question

Under the hood, the dictionary entry's 'Read only' attribute sets the 'readonly' property on the field's GlideRecord element, which is enforced at the database level for all UI interactions. UI policies, on the other hand, use client-side JavaScript to set the 'readonly' attribute on the HTML input element, and can be overridden by server-side scripts if not properly configured. A real-world scenario: using a UI policy to make a 'Close date' field read-only until the state changes to 'Closed' prevents premature data entry while keeping the field visible for reference.

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.

TExam Day Tips

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 security administrator must allow nursing staff to reach a patient records server while blocking access from the guest Wi-Fi VLAN. After applying an extended ACL, traffic is still blocked from nursing workstations. The ACL was applied outbound instead of inbound on the wrong interface. Questions like this test ACL direction and placement rules.

What to study next

Got this wrong? Here's your next step.

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

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FAQ

Questions learners often ask

What does this SNOW-CSA question test?

UI, Navigation and Forms — This question tests UI, Navigation and Forms — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: Create a UI policy that sets the field to read-only when a condition is true — Option C is correct because a UI policy can dynamically set a field to read-only based on a specified condition, such as a particular state or value. This allows administrators to control field editability at runtime without permanently altering the field's definition. Option D is correct because setting the 'Read only' attribute in the dictionary entry makes the field read-only globally across all forms and views, providing a static, system-wide restriction.

What should I do if I get this SNOW-CSA question wrong?

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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Same concept, more angles

1 more ways this is tested on SNOW-CSA

These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.

Variation 1. An administrator is asked to make the 'State' field read-only on the incident form after the record is saved. Which configuration should be used?

medium

✓ A.Create a UI Policy with condition 'always true' and set 'Read only' action, with 'On load' and 'After update' options
B.Write a Business Rule that sets the field read-only after update
C.Create an ACL that denies write access to the field
D.Use a Client Script that runs on load and makes the field read-only if the record has a sys_id

Why A: Option A is correct because a UI Policy with the condition 'always true' and the 'Read only' action, with both 'On load' and 'After update' options selected, ensures the 'State' field becomes read-only immediately after the record is saved. The 'After update' option triggers the UI Policy to re-evaluate and apply the read-only state after the record is committed, while 'On load' ensures it is also read-only when the form is first opened. This is the only declarative client-side configuration that enforces the field state both on initial load and after every save.

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