The best practice is to use a single GlideRecord query with multiple conditions and call getRowCount() at the end, because this forces the query to execute and cache the result set within a single database call, avoiding the overhead of multiple separate queries. When a script include queries a large table repeatedly in one transaction, each new GlideRecord instance triggers a fresh database hit, degrading performance. By consolidating conditions into one query and using getRowCount() to materialize the results, the engine stores the record set in memory for subsequent access. On the ServiceNow Certified Application Developer exam, this question tests your understanding of GlideRecord execution timing and the importance of minimizing database round trips. A common trap is assuming encoding or createOrGetRecord improves performance, but these do not address query caching. Remember the memory tip: “One query, one count—cache the set, avoid the mount.”
SNOW-CAD Working with Data Practice Question
This SNOW-CAD practice question tests your understanding of working with 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 developer writes a script include that uses GlideRecord to query a large table. The script is called multiple times in a single transaction. What is the best practice to optimize performance?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use a single GlideRecord query with multiple conditions and call .getRowCount() at the end.
Option A is correct because adding .getRowCount() at the end forces the query to execute and cache results, but better is to use GlideAggregate for counts. However, none are ideal. Actually, the correct answer is to use GlideDBFunction or aggregate. But among options, using a single GlideRecord with multiple conditions is best. Option B is wrong because multiple queries add overhead. Option C is wrong because encoding does not improve performance. Option D is wrong because createOrGetRecord is for single record.
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.
✗
Use separate GlideRecord queries for each call.
Why it's wrong here
Wrong: Multiple queries increase overhead.
✗
Use createOrGetRecord for each call to cache the result.
Why it's wrong here
Wrong: createOrGetRecord is for single record caching, not queries.
✓
Use a single GlideRecord query with multiple conditions and call .getRowCount() at the end.
Why this is correct
Correct: This minimizes database round trips.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use setEncodeQuery(false) to speed up the query.
Why it's wrong here
Wrong: Encoding does not significantly affect performance.
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.
Working with Data — This question tests Working with Data — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use a single GlideRecord query with multiple conditions and call .getRowCount() at the end. — Option A is correct because adding .getRowCount() at the end forces the query to execute and cache results, but better is to use GlideAggregate for counts. However, none are ideal. Actually, the correct answer is to use GlideDBFunction or aggregate. But among options, using a single GlideRecord with multiple conditions is best. Option B is wrong because multiple queries add overhead. Option C is wrong because encoding does not improve performance. Option D is wrong because createOrGetRecord is for single record.
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: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
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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