The correct answer is all of the above, because the security policy grants java.security.AllPermission to the codebase file:/home/application/lib/myapp.jar. AllPermission is a wildcard permission that effectively disables all security checks for that code source, meaning any action—whether writing to /var/log/app.log, queuing a print job, or reading /etc/config/application.properties—is automatically allowed. On the Oracle Certified Professional Java SE 17 Developer 1Z0-829 exam, this concept tests your understanding of how Java security policies evaluate permissions at the code source level; a common trap is assuming a specific permission must be listed for each action, when AllPermission overrides all granular checks. Remember the mnemonic: “AllPermission = the master key—one grant unlocks every door.”
1Z0-829 Java I/O API and Securing Applications Practice Question
This 1Z0-829 practice question tests your understanding of java i/o api and securing applications. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.
Refer to the exhibit. Assuming the application is running from /home/application/lib/myapp.jar, which of the following actions is allowed by the policy?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
All of the above
The policy grants all permissions (java.security.AllPermission) to the codebase file:/home/application/lib/myapp.jar, which means any action—including writing to /var/log/app.log, queuing a print job, and reading /etc/config/application.properties—is allowed. The AllPermission permission effectively disables all security checks for that code source, so all three listed actions are permitted.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
All of the above
Why this is correct
All three actions are explicitly granted by the policy.
Related concept
Read the scenario before looking for a memorised answer.
✗
Write to the file /var/log/app.log
Why it's wrong here
This is allowed, but option D covers all.
✗
Queue a print job using the system printer
Why it's wrong here
This is allowed, but option D covers all.
✗
Read the file /etc/config/application.properties
Why it's wrong here
This is allowed, but the question asks which actions are allowed, and option D includes this.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Oracle often tests the misconception that a policy file with a single permission entry only allows the explicitly listed action, but AllPermission is a blanket grant that overrides all other permission checks, making every action permissible.
Detailed technical explanation
How to think about this question
java.security.AllPermission is a special permission that implies all other permissions, effectively bypassing the entire Java security manager sandbox. When a codebase is granted AllPermission, the SecurityManager performs no further permission checks for that code, making it equivalent to running without a security manager. This is typically used only for trusted code, such as core Java libraries or internal application code, and should be avoided for untrusted or third-party code.
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 security administrator must allow nursing staff to reach a patient records server while blocking access from the guest Wi-Fi VLAN. After applying an extended ACL, traffic is still blocked from nursing workstations. The ACL was applied outbound instead of inbound on the wrong interface. Questions like this test ACL direction and placement rules.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Java I/O API and Securing Applications — This question tests Java I/O API and Securing Applications — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: All of the above — The policy grants all permissions (java.security.AllPermission) to the codebase file:/home/application/lib/myapp.jar, which means any action—including writing to /var/log/app.log, queuing a print job, and reading /etc/config/application.properties—is allowed. The AllPermission permission effectively disables all security checks for that code source, so all three listed actions are permitted.
What should I do if I get this 1Z0-829 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.
About these practice questions
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These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. Refer to the exhibit. A security policy file is configured as shown. The application in app.jar tries to read a file named "${user.home}/data/db.properties". What is the result?
hard
A.Access is denied because the FilePermission for data files is missing.
B.Access is denied because app.jar's AllPermission is not sufficient.
C.Access is allowed because the first grant includes read permission for logs/-, which covers data.
✓ D.Access is allowed because app.jar has AllPermission.
Why D: Option D is correct because the security policy grants AllPermission to app.jar, which supersedes any specific file permissions. AllPermission implies every possible permission, including read access to any file, regardless of path restrictions. Therefore, the application can read '${user.home}/data/db.properties' without denial.
Last reviewed: Jun 30, 2026
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