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NEW QUESTION # 24
You are implementing several batch jobs that must be executed on a schedule. These jobs have many interdependent steps that must be executed in a specific order. Portions of the jobs involve executing shell scripts, running Hadoop jobs, and running queries in BigQuery. The jobs are expected to run for many minutes up to several hours. If the steps fail, they must be retried a fixed number of times. Which service should you use to manage the execution of these jobs?

A. Cloud FunctionsB. Cloud SchedulerC. Cloud DataflowD. Cloud Composer

Answer: B


NEW QUESTION # 25
Your team is working on a binary classification problem. You have trained a support vector machine (SVM) classifier with default parameters, and received an area under the Curve (AUC) of 0.87 on the validation set.
You want to increase the AUC of the model. What should you do?

A. Perform hyperparameter tuningB. Scale predictions you get out of the model (tune a scaling factor as a hyperparameter) in order to get the highest AUCC. Train a classifier with deep neural networks, because neural networks would always beat SVMsD. Deploy the model and measure the real-world AUC; it's always higher because of generalization

Answer: B


NEW QUESTION # 26
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. Increase the size of your parquet files to ensure them to be 1 GB minimum.C. Switch to TFRecords formats (appr. 200MB per file) instead of parquet files.D. Switch from HDDs to SSDs, override the preemptible VMs configuration to increase the boot disk size.

Answer: B


NEW QUESTION # 27
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