The answer is that the datastore has approximately 50% free space. This conclusion is drawn directly from the vmkfstools command output, which displays both the total capacity and the available free space values for the datastore; when the free space value is roughly half of the total capacity, the calculation yields about 50% free space. On the VMware Certified Professional Data Center Virtualization VCP-DCV exam, this type of vmkfstools datastore free space interpretation tests your ability to read raw command output without overcomplicating it—a common trap is to confuse this straightforward ratio with thin provisioning or encryption status, which are not indicated here. Remember that vmkfstools reports physical allocation, so the math is simple: divide free space by total capacity and multiply by 100. A useful memory tip is “Half the space, half the worry”—if the free space is half the capacity, you have 50% free.
VCP-DCV vSphere Security Practice Question
This VCP-DCV practice question tests your understanding of vsphere security. 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
Refer to the exhibit.
```
vmkfstools -P /vmfs/volumes/datastore1/vm/vm.vmx
```
Output:
```
File system label: datastore1
File system type: VMFS-6
Volume capacity: 1024000 MB
Volume free: 512000 MB
Disk capacity: 1024000 MB
Disk free: 512000 MB
Block size: 1 MB
```
Refer to the exhibit. An administrator runs the vmkfstools command on an ESXi host and views the output. Which conclusion can be drawn from the output?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The datastore has approximately 50% free space.
The vmkfstools command output shows the capacity and free space values for the datastore. In this case, the free space is approximately half of the total capacity, indicating roughly 50% free space. This is a direct calculation from the displayed numbers, not an inference about provisioning or encryption.
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 datastore has approximately 50% free space.
Why this is correct
Correct: Volume free is half of volume capacity.
Related concept
Read the scenario before looking for a memorised answer.
✗
The VMDK file is thin provisioned.
Why it's wrong here
Incorrect: The command shows datastore capacity, not VMDK provisioning.
✗
The datastore has a block size of 1 MB, which is the maximum for VMFS-6.
Why it's wrong here
Incorrect: VMFS-6 supports larger block sizes.
✗
The virtual machine's disk is encrypted.
Why it's wrong here
Incorrect: vmkfstools -P does not show encryption status.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse datastore-level free space with VMDK-level provisioning attributes, assuming that a high free space percentage implies thin provisioning, when in fact thin provisioning is a separate property of the virtual disk file.
Trap categories for this question
Command / output trap
Incorrect: The command shows datastore capacity, not VMDK provisioning.
Detailed technical explanation
How to think about this question
The vmkfstools command, when used without specific flags, displays datastore-level capacity and free space in blocks. The block size of the VMFS datastore (commonly 1 MB for VMFS-6) determines the granularity of space allocation, but the output shown here only reflects total and free blocks. In real-world troubleshooting, an administrator might use 'vmkfstools -P -h' to get human-readable sizes and confirm thin provisioning via the VMDK descriptor file, which contains a 'createType' field such as 'thin' or 'eagerzeroedthick'.
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 VCP-DCV 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.
vSphere Security — This question tests vSphere Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The datastore has approximately 50% free space. — The vmkfstools command output shows the capacity and free space values for the datastore. In this case, the free space is approximately half of the total capacity, indicating roughly 50% free space. This is a direct calculation from the displayed numbers, not an inference about provisioning or encryption.
What should I do if I get this VCP-DCV 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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Question Discussion
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