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Data Acquisition and Preparation →hardMultiple ChoiceObjective-mapped

DA0-002 Data Acquisition and Preparation Practice Question

Exhibit

2023-05-01 14:32:01 INFO: Starting extraction from source 'SalesDB'
2023-05-01 14:32:05 ERROR: Connection timeout after 30s
2023-05-01 14:32:06 WARN: Retry attempt 1
2023-05-01 14:32:36 ERROR: Connection timeout after 30s
2023-05-01 14:32:37 WARN: Retry attempt 2
2023-05-01 14:33:07 ERROR: Connection timeout after 30s
2023-05-01 14:33:08 WARN: Retry attempt 3
2023-05-01 14:33:38 ERROR: Maximum retries exceeded

Refer to the exhibit. What is the most likely cause of the extraction failure?

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

✓

The network firewall is blocking the port

Connection timeouts with consistent 30-second delays suggest the network firewall is blocking the port, causing the connection to hang until timeout. Option A is wrong because if the server were down, the error would be connection refused immediately. Option C is wrong because a complex query would cause a slow query, not a connection timeout. Option D is wrong because a locked table would cause a lock wait timeout, not a connection timeout.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

  • ✗

    The source table is locked

    Why it's wrong here

    Would cause lock wait timeout.

  • ✓

    The network firewall is blocking the port

    Why this is correct

    Causes connection to hang until timeout.

  • ✗

    The extraction query is too complex

    Why it's wrong here

    Would cause slow query, not connection timeout.

  • ✗

    The database server is down

    Why it's wrong here

    Would cause immediate connection refused.

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JA

Written by Johnson Ajibi, MSc IT Security

Senior Network & Security Engineer · founder of Courseiva

This DA0-002 practice question is part of Courseiva's free CompTIA 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 DA0-002 exam.