Microsoft Fabric Data Engineer Associate DP-700 Practice Question
Your organization uses Microsoft Fabric. A lakehouse contains a Delta table named Sales totaling 20 TB spread across more than one million small Parquet files. Business users complain that queries that filter on the OrderDate and CustomerId columns take several minutes. You must improve scan performance without adding compute or changing application code. Which action should you perform on the table?
Issue REFRESH TABLE Sales to reload the latest metadata.
Set the table property delta.autoOptimize.optimizeWrite to true.
Execute OPTIMIZE Sales ZORDER BY (OrderDate, CustomerId).
Run VACUUM Sales RETAIN 0 HOURS to delete all obsolete files.
Running OPTIMIZE with a ZORDER BY clause rewrites the existing small files into larger, co-located data groups and physically orders the data by the specified columns. This greatly reduces the amount of data that needs to be read for predicates on OrderDate and CustomerId, leading to faster scans. VACUUM only removes obsolete files and has little impact on read latency. Enabling delta.autoOptimize.optimizeWrite affects future writes but does not reorganize existing data. REFRESH TABLE only updates metadata and does not change file layout or size.
Ask Bash
Bash is our AI bot, trained to help you pass your exam. AI Generated Content may display inaccurate information, always double-check anything important.
What is the purpose of OPTIMIZE with ZORDER BY in Microsoft Fabric?
Open an interactive chat with Bash
How does ZORDER BY differ from VACUUM in Delta tables?
Open an interactive chat with Bash
Why doesn’t delta.autoOptimize.optimizeWrite improve existing data performance?
Open an interactive chat with Bash
Microsoft Fabric Data Engineer Associate DP-700
Monitor and optimize an analytics solution
Your Score:
Report Issue
Bash, the Crucial Exams Chat Bot
AI Bot
Loading...
Loading...
Loading...
Pass with Confidence.
IT & Cybersecurity Package
You have hit the limits of our free tier, become a Premium Member today for unlimited access.
Military, Healthcare worker, Gov. employee or Teacher? See if you qualify for a Community Discount.
Monthly
$19.99 $11.99
$11.99/mo
Billed monthly, Cancel any time.
$19.99 after promotion ends
3 Month Pass
$44.99 $26.99
$8.99/mo
One time purchase of $26.99, Does not auto-renew.
$44.99 after promotion ends
Save $18!
MOST POPULAR
Annual Pass
$119.99 $71.99
$5.99/mo
One time purchase of $71.99, Does not auto-renew.
$119.99 after promotion ends
Save $48!
BEST DEAL
Lifetime Pass
$189.99 $113.99
One time purchase, Good for life.
Save $76!
What You Get
All IT & Cybersecurity Package plans include the following perks and exams .