Question 624 of 1,000
PDE Ingesting and Processing the Data Practice Question
This PDE practice question tests your understanding of ingesting and processing the data. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A data engineer needs to load 2 TB of Avro files stored in Cloud Storage into BigQuery on a daily schedule. The schema is static and the data should overwrite the existing table each day. What is the most efficient way to accomplish this?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use bq load with --replace flag in a cron job
The bq load command with the --replace flag is the most efficient method because it directly loads Avro files from Cloud Storage into BigQuery in a single, serverless operation without requiring any intermediate processing. Since the schema is static and the data overwrites the existing table daily, a simple cron job invoking bq load --replace is the simplest, fastest, and most cost-effective solution, avoiding the overhead of additional services like Dataflow or Data Transfer Service.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the misconception that managed services like Data Transfer Service or Dataflow are always the best choice for scheduled loads, but here the trap is that the Data Transfer Service cannot overwrite tables on a schedule, and Dataflow adds unnecessary overhead for a simple batch load with a static schema.
Detailed technical explanation
How to think about this question
The bq load command leverages BigQuery's native batch ingestion engine, which automatically parallelizes reads from Avro files in Cloud Storage and directly writes to BigQuery storage, achieving high throughput without provisioning compute resources. The --replace flag performs a DDL-level table truncation before loading, ensuring atomic replacement of the entire table, which is critical for daily overwrite scenarios. Under the hood, Avro files are read in their native format, preserving schema and compression, and the load job is fully managed by BigQuery's shared slot pool, making it the most resource-efficient option.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
Quick reference
Cloud Service Model Comparison
| Model | You Manage | Provider Manages | Examples |
|---|---|---|---|
| IaaS | OS, runtime, apps, data | Hardware, hypervisor, networking | EC2, Azure VMs, GCP Compute Engine |
| PaaS | Apps and data | OS, runtime, middleware, hardware | Elastic Beanstalk, Azure App Service |
| SaaS | Data and settings only | Everything else | Microsoft 365, Salesforce, Workday |
| FaaS / Serverless | Function code only | Infra, scaling, runtime | Lambda, Azure Functions, Cloud Run |
| CaaS | Containers and apps | Kubernetes, OS, hardware | EKS, AKS, GKE |
What to study next
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FAQ
Questions learners often ask
What does this PDE question test?
Ingesting and Processing the Data — This question tests Ingesting and Processing the Data — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use bq load with --replace flag in a cron job — The bq load command with the --replace flag is the most efficient method because it directly loads Avro files from Cloud Storage into BigQuery in a single, serverless operation without requiring any intermediate processing. Since the schema is static and the data overwrites the existing table daily, a simple cron job invoking bq load --replace is the simplest, fastest, and most cost-effective solution, avoiding the overhead of additional services like Dataflow or Data Transfer Service.
What should I do if I get this PDE question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
This PDE practice question is part of Courseiva's free Google Cloud certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the PDE exam.
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