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
CREATE VIEW u_my_view AS SELECT sys_id, number, short_description FROM incident UNION SELECT sys_id, number, short_description FROM problem
Refer to the exhibit. After creating this database view, the view contains fewer records than the sum of records in incident and problem tables. 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
✓
UNION should be UNION ALL to retain duplicate rows
Option A is correct. UNION removes duplicate rows; if there are overlapping records (same sys_id, number, short_description), they are eliminated. Using UNION ALL would keep all rows. Option B (DISTINCT) is already implied by UNION. Option C is false because views can combine tables. Option D is false because the 'active' field is not required.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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 view must include the 'active' field from both tables
Why it's wrong here
No requirement to include any specific field.
✓
UNION should be UNION ALL to retain duplicate rows
Why this is correct
UNION deduplicates rows, reducing the count if overlaps exist.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
✗
A database view cannot combine records from incident and problem tables
Why it's wrong here
Views can combine any tables.
✗
The SELECT statement should include DISTINCT
Why it's wrong here
UNION already implies DISTINCT.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
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
Got this wrong? Here's your next step.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related SNOW-CAD NAT questions on configuration and troubleshooting.
Creating and customizing tables and data — This question tests Creating and customizing tables and data — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: UNION should be UNION ALL to retain duplicate rows — Option A is correct. UNION removes duplicate rows; if there are overlapping records (same sys_id, number, short_description), they are eliminated. Using UNION ALL would keep all rows. Option B (DISTINCT) is already implied by UNION. Option C is false because views can combine tables. Option D is false because the 'active' field is not required.
What should I do if I get this SNOW-CAD question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related SNOW-CAD NAT questions on configuration and troubleshooting.
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?
Static NAT maps one inside address to one outside address.
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Question Discussion
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