Google GCP-DE Actual Tests : Data Engineer

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Google GCP-DE Exam Syllabus Topics:

Google Data Engineer Sample Questions:

1. 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 a table on Cloud SQL, and insert and delete rows with the job information
B) Create an API using App Engine to receive and send messages to the applications
C) Create a table on Cloud Spanner, and insert and delete rows with the job information
D) Use a Cloud Pub/Sub topic to publish jobs, and use subscriptions to execute them

2. Suppose you have a table that includes a nested column called "city" inside a column called "person", but when you try to submit the following query in BigQuery, it gives you an error.
SELECT person FROM `project1.example.table1` WHERE city = "London"
How would you correct the error?

A) Add ", UNNEST(person)" before the WHERE clause.
B) Change "person" to "city.person".
C) Add ", UNNEST(city)" before the WHERE clause.
D) Change "person" to "person.city".

3. Which of the following statements is NOT true regarding Bigtable access roles?

A) Using IAM roles, you cannot give a user access to only one table in a project, rather than all tables in a project.
B) You can configure access control only at the project level.
C) To give a user access to only one table in a project, grant the user the Bigtable Editor role for that table.
D) To give a user access to only one table in a project, you must configure access through your application.

4. Your company produces 20,000 files every hour. Each data file is formatted as a comma separated values (CSV) file that is less than 4 KB. All files must be ingested on Google Cloud Platform before they can be processed. Your company site has a 200 ms latency to Google Cloud, and your Internet connection bandwidth is limited as 50 Mbps. You currently deploy a secure FTP (SFTP) server on a virtual machine in Google Compute Engine as the data ingestion point. A local SFTP client runs on a dedicated machine to transmit the CSV files as is. The goal is to make reports with data from the previous day available to the executives by 10:00 a.m. each day. This design is barely able to keep up with the current volume, even though the bandwidth utilization is rather low.
You are told that due to seasonality, your company expects the number of files to double for the next three months. Which two actions should you take? (choose two.)

A) Assemble 1,000 files into a tape archive (TAR) fil
B) Contact your internet service provider (ISP) to increase your maximum bandwidth to at least 100 Mbps.
C) Transmit the TAR files instead, and disassemble the CSV files in the cloud upon receiving them.
D) Redesign the data ingestion process to use gsutil tool to send the CSV files to a storage bucket in parallel.
E) Introduce data compression for each file to increase the rate file of file transfer.
F) Create an S3-compatible storage endpoint in your network, and use Google Cloud Storage Transfer Service to transfer on-premices data to the designated storage bucket.

5. Which row keys are likely to cause a disproportionate number of reads and/or writes on a particular node in a Bigtable cluster (select 2 answers)?

A) A sequential numeric ID
B) A timestamp followed by a stock symbol
C) A non-sequential numeric ID
D) A stock symbol followed by a timestamp

Solutions: