PAS-C01 Operations and Maintenance Practice Question
Exhibit
Refer to the exhibit.
Output from `aws ec2 describe-instances`:
```
{
"Reservations": [
{
"Instances": [
{
"InstanceId": "i-0abcd1234efgh5678",
"InstanceType": "r5.2xlarge",
"State": {
"Name": "running"
},
"BlockDeviceMappings": [
{
"DeviceName": "/dev/xvda",
"Ebs": {
"VolumeId": "vol-0a1b2c3d4e5f67890",
"Status": "attached"
}
},
{
"DeviceName": "/dev/sdf",
"Ebs": {
"VolumeId": "vol-0a1b2c3d4e5f67891",
"Status": "attached"
}
}
]
}
]
}
]
}
```Refer to the exhibit. An SAP HANA instance is running on an EC2 instance. The volume `/dev/sdf` is used for HANA data. The operations team needs to increase the disk size for HANA data without downtime. Which action should they take?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Modify the EBS volume size while the instance is running.
Modifying the EBS volume size while the instance is running is supported for most volume types, allowing for a no-downtime increase. Option A is wrong because launching a new instance and migrating data would cause downtime. Option B is wrong because stopping the instance is unnecessary and would cause downtime. Option C is wrong because adding a new volume and moving data would also require downtime for the migration.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Launch a new instance with a larger volume and migrate HANA data.
Why it's wrong here
Launching a new instance with a larger volume and migrating HANA data introduces downtime during the migration process, directly contradicting the stem’s requirement for zero downtime. This option is tempting because it is a standard disaster-recovery or planned-migration procedure when an existing volume cannot be resized online, and it would be correct if the operations team could schedule a maintenance window.
- ✗
Stop the instance, modify the volume size, and start the instance.
Why it's wrong here
Stopping the instance causes downtime, which is not required.
- ✗
Add a new EBS volume to the instance and move HANA data to the new volume.
Why it's wrong here
Adding a new volume requires moving data, which may cause downtime.
- ✓
Modify the EBS volume size while the instance is running.
Why this is correct
EBS volumes can be modified without detaching or stopping the instance.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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