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Google Data Engineer Sample Questions:

1. You want to migrate an on-premises Hadoop system to Cloud Dataproc. Hive is the primary tool in use, and the data format is Optimized Row Columnar (ORC). All ORC files have been successfully copied to a Cloud Storage bucket. You need to replicate some data to the cluster's local Hadoop Distributed File System (HDFS) to maximize performance. What are two ways to start using Hive in Cloud Dataproc? (Choose two.)

A) Load the ORC files into BigQuer
B) Run the gsutil utility to transfer all ORC files from the Cloud Storage bucket to any node of the Dataproc cluste
C) Leverage BigQuery connector for Hadoop to mount the BigQuery tables as external Hive table
D) Run the gsutil utility to transfer all ORC files from the Cloud Storage bucket to HDF
E) Mount the Hive tables from HDFS.
F) Run the gsutil utility to transfer all ORC files from the Cloud Storage bucket to the master node of the Dataproc cluste
G) Leverage Cloud Storage connector for Hadoop to mount the ORC files as external Hive table
H) Mount the Hive tables locally.
I) Replicate external Hive tables to the native ones.
J) Mount the Hive tables locally.
K) Replicate external Hive tables to the native ones.
L) Then run the Hadoop utility to copy them do HDF

2. You work for a global shipping company. You want to train a model on 40 TB of data to predict which ships in each geographic region are likely to cause delivery delays on any given day. The model will be based on multiple attributes collected from multiple sources. Telemetry data, including location in GeoJSON format, will be pulled from each ship and loaded every hour. You want to have a dashboard that shows how many and which ships are likely to cause delays within a region. You want to use a storage solution that has native functionality for prediction and geospatial processing. Which storage solution should you use?

A) BigQuery
B) Cloud Datastore
C) Cloud SQL for PostgreSQL
D) Cloud Bigtable

3. You have enabled the free integration between Firebase Analytics and Google BigQuery. Firebase now automatically creates a new table daily in BigQuery in the format app_events_YYYYMMDD. You want to query all of the tables for the past 30 days in legacy SQL. What should you do?

A) Use SELECT IF.(date >= YYYY-MM-DD AND date <= YYYY-MM-DD
B) Use WHERE date BETWEEN YYYY-MM-DD AND YYYY-MM-DD
C) Use the TABLE_DATE_RANGE function
D) Use the WHERE_PARTITIONTIME pseudo column

4. Which of the following is NOT one of the three main types of triggers that Dataflow supports?

A) Trigger based on element size in bytes
B) Trigger based on element count
C) Trigger that is a combination of other triggers
D) Trigger based on time

5. You are responsible for writing your company's ETL pipelines to run on an Apache Hadoop cluster. The pipeline will require some checkpointing and splitting pipelines. Which method should you use to write the pipelines?

A) Java using MapReduce
B) Python using MapReduce
C) HiveQL using Hive
D) PigLatin using Pig

Solutions: