The correct answer is that the field u_extra_field was recently deleted from the table. This is the most likely cause because the scheduled job’s query references a column that no longer exists in the database schema, triggering a field deletion error when the job executes. On the ServiceNow Certified Application Developer CAD exam, this scenario tests your understanding of how schema changes impact running scripts and scheduled jobs, a common pitfall when managing application scope or table configurations. A typical trap is assuming the error stems from access rights or job timing, but the direct clue is that the job previously worked and broke after a schema alteration. Memory tip: think of it as a “missing column” domino—delete a field, and every script that touches it falls.
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. 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.
Exhibit
ERROR: Invalid field name: u_extra_field at line 12 of script include 'CustomTableUtils'
A developer encounters the following error when a scheduled job executes. The job queries the 'u_my_table' table. What is the most likely cause?
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.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The field u_extra_field was recently deleted from the table.
The error occurs because the scheduled job references the field 'u_extra_field' in its query against the 'u_my_table' table. When that field is deleted from the table definition, any script or job that attempts to read or write to that field will fail with a 'column not found' or similar database error. This is the most direct cause among the options, as the job was previously working and the error appeared after a schema change.
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 field u_extra_field was recently deleted from the table.
Why this is correct
Correct: The error says 'Invalid field name', meaning the field is not found in the table. Deletion is the most likely cause.
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 table name is misspelled in the script.
Why it's wrong here
A misspelled table name would result in a 'Table does not exist' error, not an invalid field name error.
✗
The script include has a syntax error.
Why it's wrong here
A syntax error would typically produce a different error message, not specifically 'Invalid field name'.
✗
The field u_extra_field exists but is not indexed.
Why it's wrong here
If the field existed, even without an index, the script would not throw an invalid field name error.
Common exam traps
Common exam trap: answer the scenario, not the keyword
ServiceNow often tests the distinction between schema-related errors (deleted fields) and other error types (syntax, missing indexes, misspellings) to see if candidates understand that a field deletion directly breaks queries referencing that field, while other options cause different symptoms or no error at all.
Detailed technical explanation
How to think about this question
In ServiceNow, table schemas are stored in the 'sys_dictionary' table, and when a field is deleted, the column is removed from the underlying database table (e.g., MySQL or MariaDB). Any scheduled job, business rule, or script that references the deleted column will fail with a 'Column not found' SQL error. This is a common issue when developers remove fields without auditing all references in scripts, reports, or scheduled jobs.
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 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 exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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: The field u_extra_field was recently deleted from the table. — The error occurs because the scheduled job references the field 'u_extra_field' in its query against the 'u_my_table' table. When that field is deleted from the table definition, any script or job that attempts to read or write to that field will fail with a 'column not found' or similar database error. This is the most direct cause among the options, as the job was previously working and the error appeared after a schema change.
What should I do if I get this SNOW-CAD question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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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