Alibaba DEA-C01 Certification Exam Sample Questions

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Alibaba DEA-C01 Sample Questions:

01. A company stores customer transactions, product images, clickstream logs, and social media posts in a centralized repository. Which big data characteristic is primarily demonstrated?
a) Variety
b) Volume
c) Velocity
d) Value
 
02. Which tool is commonly associated with data development, scheduling, and workflow orchestration in Alibaba Cloud data engineering?
a) CDN
b) DataWorks
c) RAM
d) SLB
 
03. A web application generates clickstream events that must be ingested continuously for downstream processing. Which Alibaba Cloud service is most appropriate?
a) MaxCompute
b) DataV
c) DataHub
d) CloudMonitor
 
04. Which characteristic of big data refers to the increasing speed at which data is generated, collected, and analyzed?
a) Velocity
b) Variety
c) Veracity
d) Volume
 
05. A data engineer creates separate layers for raw data, cleaned data, and business-ready tables. What is the main benefit?
a) It makes every query run without compute resources.
b) It removes the need for all governance controls.
c) It prevents source systems from changing.
d) It improves data organization, traceability, and reuse.
 
06. Which practices help improve reliability in real-time processing jobs?
(Select TWO)
a) Configure checkpointing or state recovery where supported
b) Monitor throughput, latency, and processing errors.
c) Disable all retries to avoid duplicate handling.
d) Ignore failures if the job restarts automatically.
e) Remove alerting from production pipelines.
 
07. What is a common risk when large analytical datasets are stored without lifecycle management?
a) Storage cost and data clutter may grow unnecessarily.
b) All queries automatically become faster.
c) Data access control becomes unnecessary.
d) Processing jobs no longer need input data.
 
08. A system calculates a rolling count of active users over the last ten minutes. Which processing technique is being applied?
a) Manual data-entry validation
b) Quarterly offline consolidation
c) Static report archiving
d) Sliding-window computation
 
09. A batch workflow recalculates the same business metric using different logic in multiple jobs. What is the main risk?
a) Processing will automatically become real time.
b) Reports may show inconsistent metric definitions.
c) Data storage requirements will become zero.
d) All source systems will be synchronized instantly.
 
10. What is the main purpose of separating development, testing, and production environments for batch jobs?
a) To remove the need for job scheduling
b) To make production data unavailable to all authorized users
c) To reduce the risk of untested changes affecting production data
d) To prevent batch jobs from using source data

Answers:

Question: 01
Answer: a		 Question: 02
Answer: b		 Question: 03
Answer: c		 Question: 04
Answer: a		 Question: 05
Answer: d
Question: 06
Answer: a, b		 Question: 07
Answer: a		 Question: 08
Answer: d		 Question: 09
Answer: b		 Question: 10
Answer: c

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