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NEW QUESTION 44
You are selecting services to write and transform JSON messages from Cloud Pub/Sub to BigQuery for a data pipeline on Google Cloud. You want to minimize service costs. You also want to monitor and accommodate input data volume that will vary in size with minimal manual intervention. What should you do?
- A. Use Cloud Dataproc to run your transformations. Use the diagnose command to generate an operational output archive. Locate the bottleneck and adjust cluster resources.
- B. Use Cloud Dataflow to run your transformations. Monitor the total execution time for a sampling of jobs. Configure the job to use non-default Compute Engine machine types when needed.
- C. Use Cloud Dataproc to run your transformations. Monitor CPU utilization for the cluster. Resize the number of worker nodes in your cluster via the command line.
- D. Use Cloud Dataflow to run your transformations. Monitor the job system lag with Stackdriver. Use the default autoscaling setting for worker instances.
Answer: A
NEW QUESTION 45
You have historical data covering the last three years in BigQuery and a data pipeline that delivers new data to BigQuery daily. You have noticed that when the Data Science team runs a query filtered on a date column and limited to 30-90 days of data, the query scans the entire table. You also noticed that your bill is increasing more quickly than you expected. You want to resolve the issue as cost-effectively as possible while maintaining the ability to conduct SQL queries. What should you do?
- A. Modify your pipeline to maintain the last 30-90 days of data in one table and the longer history in a different table to minimize full table scans over the entire history.
- B. Write an Apache Beam pipeline that creates a BigQuery table per day. Recommend that the Data Science team use wildcards on the table name suffixes to select the data they need.
- C. Re-create the tables using DDL. Partition the tables by a column containing a TIMESTAMP or DATE Type.
- D. Recommend that the Data Science team export the table to a CSV file on Cloud Storage and use Cloud Datalab to explore the data by reading the files directly.
Answer: A
NEW QUESTION 46
You’ve migrated a Hadoop job from an on-prem cluster to dataproc and GCS. Your Spark job is a complicated analytical workload that consists of many shuffing operations and initial data are parquet files (on average
200-400 MB size each). You see some degradation in performance after the migration to Dataproc, so you’d like to optimize for it. You need to keep in mind that your organization is very cost-sensitive, so you’d like to continue using Dataproc on preemptibles (with 2 non-preemptible workers only) for this workload.
What should you do?
- A. Switch from HDDs to SSDs, copy initial data from GCS to HDFS, run the Spark job and copy results back to GCS.
- B. Switch to TFRecords formats (appr. 200MB per file) instead of parquet files.
- C. Increase the size of your parquet files to ensure them to be 1 GB minimum.
- D. Switch from HDDs to SSDs, override the preemptible VMs configuration to increase the boot disk size.
Answer: C
NEW QUESTION 47
You operate a logistics company, and you want to improve event delivery reliability for vehicle-based sensors.
You operate small data centers around the world to capture these events, but leased lines that provide connectivity from your event collection infrastructure to your event processing infrastructure are unreliable, with unpredictable latency. You want to address this issue in the most cost-effective way. What should you do?
- A. Deploy small Kafka clusters in your data centers to buffer events.
- B. Write a Cloud Dataflow pipeline that aggregates all data in session windows.
- C. Establish a Cloud Interconnect between all remote data centers and Google.
- D. Have the data acquisition devices publish data to Cloud Pub/Sub.
Answer: D
NEW QUESTION 48
You are building a new data pipeline to share data between two different types of applications: jobs generators and job runners. Your solution must scale to accommodate increases in usage and must accommodate the addition of new applications without negatively affecting the performance of existing ones. What should you do?
- A. Create an API using App Engine to receive and send messages to the applications
- B. Create a table on Cloud SQL, and insert and delete rows with the job information
- C. Use a Cloud Pub/Sub topic to publish jobs, and use subscriptions to execute them
- D. Create a table on Cloud Spanner, and insert and delete rows with the job information
Answer: C
Explanation:
Pubsub is used to transmit data in real time and scale automatically.
NEW QUESTION 49
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