AllPermission in Java Security Policy
Exhibit
grant codeBase "file:/home/application/-" {
permission java.io.FilePermission "/etc/config/-", "read";
permission java.io.FilePermission "/var/log/-", "read,write";
permission java.lang.RuntimePermission "queuePrintJob";
};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?
Quick Answer
All of the above is correct because the security policy in this scenario grants java.security.AllPermission to the specific codebase where the application's jar lives, and AllPermission is deliberately the broadest permission Java's security model offers; it does not enumerate individual allowed actions like file writes, print access, or file reads, it simply turns off permission checking entirely for that code source. Once a codebase holds AllPermission, asking whether it can perform any particular action, whether that is writing to a log file, queuing a print job, or reading a configuration file, becomes moot, because there is no narrower permission being checked against, so every action passes. This is different from policies that grant a list of specific, scoped permissions, such as a permission for one directory or one property key, where you would need to check each requested action against the exact grants listed to determine what is allowed and what is not. AllPermission collapses that whole exercise, which is exactly why it should be used sparingly in real applications and why exam questions use it to test whether you understand its scope rather than testing your ability to parse a list of granular permissions. Whenever a policy file grants AllPermission to a codebase, treat every subsequent 'is this action allowed' question about that codebase as already answered: yes.
⚠ Common exam trap
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.
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
✓
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.
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
Correct. The policy grants AllPermission, so all actions (including writing to /var/log/app.log, queuing a print job, and reading /etc/config/application.properties) are allowed. Therefore, 'All of the above' is the correct answer.
- ✗
Write to the file /var/log/app.log
Why it's wrong here
Incorrect as the answer to the question. While writing to the file is indeed allowed by the policy, the correct answer is 'All of the above' (option A) because all listed actions are permitted. Option B is a true statement but not the best answer.
- ✗
Queue a print job using the system printer
Why it's wrong here
Incorrect as the answer to the question. Queuing a print job is allowed, but the correct answer is 'All of the above' (option A) because all actions are permitted.
- ✗
Read the file /etc/config/application.properties
Why it's wrong here
Incorrect as the answer to the question. Reading the file is allowed, but the correct answer is 'All of the above' (option A) because all actions are permitted.
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Same concept, more angles
1 more way this is tested on 1Z0-829
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 "${user.home}/data/db.properties". What is the result?
hard- A.Access is denied because the FilePermission for data files is missing.
- B.Access is denied because app.jar's AllPermission is not sufficient.
- C.Access is allowed because the first grant includes read permission for logs/-, which covers data.
- ✓ D.Access is allowed because app.jar has AllPermission.
Why D: The security policy grants AllPermission to app.jar, which supersedes any specific file permissions. AllPermission implies every possible permission, including read access to any file, regardless of path restrictions. Therefore, the application can read '${user.home}/data/db.properties' without denial.
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 1Z0-829 practice question is part of Courseiva's free Oracle 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 1Z0-829 exam.