Storage transfer service in GCP - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to specify the source bucket in a Storage Transfer Service job.

GCP

transferJob = {
  "transferSpec": {
    "gcsDataSource": {
      "bucketName": "[1]"
    },
    "gcsDataSink": {
      "bucketName": "destination-bucket"
    }
  }
}

Drag options to blanks, or click blank then click option'

Adestination-bucket-name

Bsource-bucket-name

Ctransfer-job-name

Dproject-id

Attempts:

3 left

💡 Hint

Common Mistakes

Using the destination bucket name as the source.

Using project ID instead of bucket name.

The source bucket name must be specified under gcsDataSource.bucketName to tell the Storage Transfer Service where to copy data from.

2fill in blank

medium

Complete the code to set the schedule for a daily Storage Transfer Service job.

GCP

transferJob = {
  "schedule": {
    "scheduleStartDate": {
      "year": 2024,
      "month": 6,
      "day": 1
    },
    "startTimeOfDay": {
      "hours": [1],
      "minutes": 0,
      "seconds": 0
    }
  }
}

Drag options to blanks, or click blank then click option'

A24

B-1

C2

D25

Attempts:

3 left

💡 Hint

Common Mistakes

Using 24 or higher for hours, which is invalid.

Using negative numbers for hours.

The hours field must be between 0 and 23. Setting it to 2 means the job starts at 2 AM.

3fill in blank

hard

Fix the error in the transfer job configuration to enable object conditions.

GCP

transferJob = {
  "transferSpec": {
    "objectConditions": {
      "minTimeElapsedSinceLastModification": "[1]"
    },
    "gcsDataSource": {
      "bucketName": "source-bucket"
    },
    "gcsDataSink": {
      "bucketName": "destination-bucket"
    }
  }
}

Drag options to blanks, or click blank then click option'

A3600s

B3600

C1 hour

D3600 seconds

Attempts:

3 left

💡 Hint

Common Mistakes

Using plain numbers without units.

Using words like '1 hour' instead of duration format.

The time duration must be specified as a string with a suffix like 's' for seconds. '3600s' means 3600 seconds (1 hour).

4fill in blank

hard

Fill both blanks to configure a Storage Transfer Service job with a filter and a schedule.

GCP

transferJob = {
  "transferSpec": {
    "gcsDataSource": {
      "bucketName": "source-bucket"
    },
    "objectConditions": {
      "includePrefixes": ["[1]"]
    }
  },
  "schedule": {
    "scheduleStartDate": {
      "year": 2024,
      "month": 6,
      "day": 10
    },
    "startTimeOfDay": {
      "hours": [2],
      "minutes": 30,
      "seconds": 0
    }
  }
}

Drag options to blanks, or click blank then click option'

Aimages/

Bvideos/

C3

D15

Attempts:

3 left

💡 Hint

Common Mistakes

Using invalid hour values like 24.

Using prefixes without trailing slash if filtering folders.

The includePrefixes filters objects starting with 'images/'. The schedule starts at 3:30 AM.

5fill in blank

hard

Fill all three blanks to create a Storage Transfer Service job with a description, schedule, and transfer spec.

GCP

transferJob = {
  "description": "[1]",
  "schedule": {
    "scheduleStartDate": {
      "year": 2024,
      "month": 7,
      "day": 1
    },
    "startTimeOfDay": {
      "hours": [2],
      "minutes": 0,
      "seconds": 0
    }
  },
  "transferSpec": {
    "gcsDataSource": {
      "bucketName": "[3]"
    },
    "gcsDataSink": {
      "bucketName": "backup-bucket"
    }
  }
}

Drag options to blanks, or click blank then click option'

ADaily backup job

B4

Cprimary-data-bucket

DWeekly backup job

Attempts:

3 left

💡 Hint

Common Mistakes

Using invalid hour values.

Mixing up source and destination bucket names.

The description is 'Daily backup job'. The job starts at 4 AM. The source bucket is 'primary-data-bucket'.

Practice

1. What is the primary purpose of the Google Cloud Storage Transfer Service?

easy

A. To move or copy data between different storage locations automatically

B. To create backups of virtual machines

C. To monitor network traffic between cloud services

D. To manage user permissions in Google Cloud

Solution

1. Step 1: Understand the service function

   Storage Transfer Service is designed to move or copy data between storage locations like on-premises, AWS S3, or Google Cloud Storage.

2. Step 2: Eliminate unrelated options

   Options B, C, and D describe different services unrelated to data transfer.

3. Final Answer:

   To move or copy data between different storage locations automatically -> Option A

4. Quick Check:

   Storage Transfer Service = Data movement [OK]

Hint: Remember: Transfer Service moves or copies data [OK]

Common Mistakes:

• Confusing transfer service with backup or monitoring tools
• Thinking it manages user permissions
• Assuming it only works within Google Cloud

2. Which of the following is the correct way to specify a source in a Storage Transfer Service job configuration?

easy

A. "source": {"network": {"subnet": "default"}}

B. "source": {"vmInstance": {"name": "instance-1"}}

C. "source": {"gcsDataSource": {"bucketName": "my-source-bucket"}}

D. "source": {"sqlDatabase": {"dbName": "mydb"}}

Solution

1. Step 1: Identify valid source types

   Storage Transfer Service supports sources like Google Cloud Storage buckets, AWS S3 buckets, or on-premises data.

2. Step 2: Match correct JSON syntax for GCS source

   The correct syntax uses "gcsDataSource" with a "bucketName" field, as shown in "source": {"gcsDataSource": {"bucketName": "my-source-bucket"}}.

3. Final Answer:

   "source": {"gcsDataSource": {"bucketName": "my-source-bucket"}} -> Option C

4. Quick Check:

   Source config for GCS = "source": {"gcsDataSource": {"bucketName": "my-source-bucket"}} [OK]

Hint: Look for "gcsDataSource" with bucketName for GCS source [OK]

Common Mistakes:

• Using unsupported source types like VM or SQL database
• Incorrect JSON structure for source
• Confusing source with destination fields

3. Given this Storage Transfer Service schedule configuration snippet:

{"schedule": {"scheduleStartDate": {"year": 2024, "month": 6, "day": 10}, "startTimeOfDay": {"hours": 3, "minutes": 0}}}

When will the transfer job start?

medium

A. At 3:00 AM on June 10, 2024

B. At 3:00 PM on June 10, 2024

C. At midnight on June 10, 2024

D. At 3:00 AM on June 9, 2024

Solution

1. Step 1: Read the scheduleStartDate and startTimeOfDay

   The date is June 10, 2024, and the time is 3 hours and 0 minutes, which means 3:00 AM.

2. Step 2: Confirm time format

   The time is in 24-hour format, so 3 means 3 AM, not PM.

3. Final Answer:

   At 3:00 AM on June 10, 2024 -> Option A

4. Quick Check:

   3 hours = 3 AM, date matches [OK]

Hint: Hours in 24-hour format; 3 means 3 AM [OK]

Common Mistakes:

• Mistaking 3 for 3 PM instead of 3 AM
• Ignoring the date and assuming current day
• Confusing startTimeOfDay with duration

4. You wrote this Storage Transfer Service job configuration but the transfer never starts:

{"transferJob": {"status": "ENABLED", "schedule": {"scheduleStartDate": {"year": 2024, "month": 7, "day": 20}, "startTimeOfDay": {"hours": 25, "minutes": 0}}}}

What is the problem?

medium

A. The transferJob status should be DISABLED to start

B. The scheduleStartDate is in the past

C. The minutes value must be 30 or 60

D. The startTimeOfDay hours value is invalid; it must be between 0 and 23

Solution

1. Step 1: Check startTimeOfDay values

   The hours field is set to 25, which is invalid because valid hours range from 0 to 23.

2. Step 2: Validate other fields

   The scheduleStartDate is a future date, status is ENABLED which is correct, and minutes is 0 which is valid.

3. Final Answer:

   The startTimeOfDay hours value is invalid; it must be between 0 and 23 -> Option D

4. Quick Check:

   Hours must be 0-23, 25 is invalid [OK]

Hint: Hours must be 0-23; 25 is invalid [OK]

Common Mistakes:

• Assuming status DISABLED starts the job
• Thinking minutes must be 30 or 60
• Ignoring invalid hour value

5. You want to transfer data daily from an AWS S3 bucket to a Google Cloud Storage bucket using Storage Transfer Service. Which combination of settings is required?

hard

A. Set GCS bucket as source, AWS S3 as destination, and schedule weekly

B. Set AWS S3 as source with access keys, GCS bucket as destination, and schedule daily

C. Use on-premises source with VPN, GCS bucket as destination, and schedule once

D. Set AWS S3 as source without credentials, GCS bucket as destination, and no schedule

Solution

1. Step 1: Identify source and destination

   The source is AWS S3 bucket, which requires access keys for authentication. The destination is a Google Cloud Storage bucket.

2. Step 2: Set schedule for daily transfers

   To transfer data daily, the schedule must be configured to run every day.

3. Final Answer:

   Set AWS S3 as source with access keys, GCS bucket as destination, and schedule daily -> Option B

4. Quick Check:

   AWS S3 source + credentials + daily schedule = Set AWS S3 as source with access keys, GCS bucket as destination, and schedule daily [OK]

Hint: AWS S3 needs keys; schedule daily for repeated transfers [OK]

Common Mistakes:

• Forgetting AWS credentials
• Reversing source and destination
• Not setting a schedule for repeated transfers