Question 169 of 513
1Z0-829 Java I/O API and Securing Applications Practice Question
Exhibit
grant codeBase "file:/opt/app/lib/*" {
permission java.io.FilePermission "/data/config/*", "read";
permission java.io.FilePermission "/logs/app.log", "write";
};Refer to the exhibit. A Java application is deployed in /opt/app/lib/ and attempts to perform the following operations: 1) Read the file /data/config/settings.xml 2) Write to the file /logs/app.log 3) Read the file /data/config/subdir/extra.conf Which statement is true?
⚠ Common exam trap
In Oracle Java security policy, the wildcard (*) matches files in the immediate directory only, not subdirectories. To include subdirectories, the policy must use the recursive wildcard (-). For example, /data/config/* matches /data/config/settings.xml but not /data/config/subdir/extra.conf; /data/config/- would match both.
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
✓
Operations 1 and 2 are allowed; operation 3 is denied.
The Java application is deployed in /opt/app/lib/, so its code base is /opt/app/lib/. The security policy grants read permission for /data/config/*, which matches /data/config/settings.xml (operation 1) but does not match /data/config/subdir/extra.conf because the wildcard * does not descend into subdirectories (operation 3 is denied). Write permission is granted for /logs/*, so /logs/app.log (operation 2) is allowed. Thus, operations 1 and 2 are allowed, and operation 3 is denied.
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 three operations are allowed because the code base matches.
Why it's wrong here
The wildcard * in "/data/config/*" does not include subdirectories, so extra.conf is not allowed.
- ✓
Operations 1 and 2 are allowed; operation 3 is denied.
Why this is correct
Operation 1 is allowed by "/data/config/*" (file in /data/config/). Operation 2 is explicitly granted. Operation 3 is in a subdirectory, not matched by *.
- ✗
Only operation 1 is allowed; operations 2 and 3 are denied.
Why it's wrong here
Operation 2 is explicitly allowed by the second permission, so it is allowed.
- ✗
Operations 1 and 3 are allowed; operation 2 is denied.
Why it's wrong here
Operation 3 is denied, and operation 2 is allowed.
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Last reviewed: Jul 4, 2026
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