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Question 338 of 1,786

Data Operations and Support →hardMultiple ChoiceObjective-mapped

Missing Hive JARs in AWS Glue from EMR Metastore

This DEA-C01 practice question tests your understanding of data operations and support. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 is troubleshooting a failed AWS Glue job that reads from an Apache Hive metastore in an Amazon EMR cluster. The error message indicates 'ClassNotFoundException: org.apache.hadoop.hive.ql.metadata.HiveException'. The Glue job uses a custom Python shell script. What is the most likely cause of this error?

Clue words in this question

Noticing these words before you look at the options changes how you read each choice.

Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.

A
Check the network connectivity between Glue and the EMR cluster.
Why wrong: Network issues cause connection timeouts, not class not found.
B
Include the Hive JAR files in the 'Python library path' or use a Glue version with Hive support.
Glue needs Hive JARs in the classpath to connect to Hive metastore.
C
Modify the Python script to import the Hive libraries manually.
Why wrong: Python imports do not resolve Java classpath issues.
D
Update the IAM role to allow 'hive:Describe*' actions.
Why wrong: IAM actions do not affect class loading.

Full breakdown with real-world context →

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

✓

Include the Hive JAR files in the 'Python library path' or use a Glue version with Hive support.

Option B is correct because the ClassNotFoundException for Hive classes indicates that the required Hive JARs are not available in the Glue job's classpath. The solution is to include the Hive JAR files in the 'Python library path' or use a Glue version that supports Hive connectivity. Option A is incorrect because a network connectivity issue would cause a different error, such as a timeout or connection refused. Option C is incorrect because simply adding an import statement in the Python script does not provide the underlying JAR files; the JARs must be included via library path. Option D is incorrect because IAM permissions do not affect class loading; the error is related to missing dependencies, not authorization.

Key principle: Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.

Answer analysis

Option-by-option breakdown

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

✗
Check the network connectivity between Glue and the EMR cluster.
Why it's wrong here
Network issues cause connection timeouts, not class not found.
✓
Include the Hive JAR files in the 'Python library path' or use a Glue version with Hive support.
Why this is correct
Glue needs Hive JARs in the classpath to connect to Hive metastore.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Authentication checks who the user is.
✗
Modify the Python script to import the Hive libraries manually.
Why it's wrong here
Python imports do not resolve Java classpath issues.
✗
Update the IAM role to allow 'hive:Describe*' actions.
Why it's wrong here
IAM actions do not affect class loading.

Common exam traps

Common exam trap: authentication is not authorization

Logging in proves the user can authenticate. It does not automatically mean the user is allowed to enter privileged or configuration mode. Watch for AAA authorization, privilege level and command authorization details.

Detailed technical explanation

How to think about this question

This kind of question is testing the difference between identity and permission. A user may successfully log in to a router because authentication is working, but still fail to enter configuration mode because authorization is missing, misconfigured or mapped to a lower privilege level.

KKey Concepts to Remember

Authentication checks who the user is.
Authorization controls what the user is allowed to do after login.
Privilege levels affect access to EXEC and configuration commands.
AAA, TACACS+ and RADIUS can separate login success from command access.

TExam Day Tips

Do not assume successful login means full administrative access.
Look for words such as cannot enter configuration mode, privilege level, authorization or command access.
Separate login problems from permission problems before choosing the answer.

Key takeaway

Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.

Real-world example

How this comes up in practice

A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.

What to study next

Got this wrong? Here's your next step.

Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related DEA-C01 questions on access control and AAA configuration.

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FAQ

Questions learners often ask

What does this DEA-C01 question test?

Data Operations and Support — This question tests Data Operations and Support — Authentication checks who the user is..

What is the correct answer to this question?

The correct answer is: Include the Hive JAR files in the 'Python library path' or use a Glue version with Hive support. — Option B is correct because the ClassNotFoundException for Hive classes indicates that the required Hive JARs are not available in the Glue job's classpath. The solution is to include the Hive JAR files in the 'Python library path' or use a Glue version that supports Hive connectivity. Option A is incorrect because a network connectivity issue would cause a different error, such as a timeout or connection refused. Option C is incorrect because simply adding an import statement in the Python script does not provide the underlying JAR files; the JARs must be included via library path. Option D is incorrect because IAM permissions do not affect class loading; the error is related to missing dependencies, not authorization.

What should I do if I get this DEA-C01 question wrong?

Are there clue words in this question I should notice?

Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.

What is the key concept behind this question?

Authentication checks who the user is.

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