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Google Data Engineer Sample Questions:

1. You need to deploy additional dependencies to all of a Cloud Dataproc cluster at startup using an existing initialization action. Company security policies require that Cloud Dataproc nodes do not have access to the Internet so public initialization actions cannot fetch resources. What should you do?

A) Copy all dependencies to a Cloud Storage bucket within your VPC security perimeter
B) Use Resource Manager to add the service account used by the Cloud Dataproc cluster to the Network User role
C) Deploy the Cloud SQL Proxy on the Cloud Dataproc master
D) Use an SSH tunnel to give the Cloud Dataproc cluster access to the Internet

2. What is the general recommendation when designing your row keys for a Cloud Bigtable schema?

A) Keep the row keep as an 8 bit integer
B) Keep your row key as long as the field permits
C) Include multiple time series values within the row key
D) Keep your row key reasonably short

3. MJTelco needs you to create a schema in Google Bigtable that will allow for the historical analysis of the last 2 years of records. Each record that comes in is sent every 15 minutes, and contains a unique identifier of the device and a data record. The most common query is for all the data for a given device for a given day. Which schema should you use?

A) Rowkey: dateColumn data: device_id, data_point
B) Rowkey: data_pointColumn data: device_id, date
C) Rowkey: device_idColumn data: date, data_point
D) Rowkey: date#data_pointColumn data: device_id
E) Rowkey: date#device_idColumn data: data_point

4. You need to choose a database for a new project that has the following requirements:
Fully managed
Able to automatically scale up
Transactionally consistent
Able to scale up to 6 TB
Able to be queried using SQL Which database do you choose?

A) Cloud Spanner
B) Cloud Datastore
C) Cloud SQL
D) Cloud Bigtable

5. What are two methods that can be used to denormalize tables in BigQuery?

A) 1) Split table into multiple tables; 2) Use a partitioned table
B) 1) Use nested repeated fields; 2) Use a partitioned table
C) 1) Use a partitioned table; 2) Join tables into one table
D) 1) Join tables into one table; 2) Use nested repeated fields

Solutions: