- A
System.setProperty("java.security.policy", "policy.url") loads a new policy.
Why wrong: Only sets the property; explicit Policy refresh needed.
- B
The SecurityManager class is deprecated in Java 17.
Deprecated since Java 18? Actually Java 17 already marks it deprecated.
- C
By default, Java 17 applications run with a SecurityManager installed.
Why wrong: No default SecurityManager; must be enabled manually.
- D
A security policy file can contain grant entries for code sources.
Policy files define permissions per code source.
- E
AccessController.doPrivileged() allows code to temporarily escalate privileges.
Enables privileged code blocks with limited permissions.
Question 79 of 519
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. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
Which THREE statements about the SecurityManager and security policies in Java 17 are true? (Choose three.)
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 SecurityManager class is deprecated in Java 17.
The SecurityManager class is deprecated for removal in Java 17 (JEP 411). This deprecation means that while the class still exists for compatibility, it is no longer recommended for use and may be removed in a future release. The core reasoning is that the SecurityManager architecture is considered legacy and difficult to maintain, so Oracle has deprecated it to encourage developers to adopt alternative security mechanisms.
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.
- ✗
System.setProperty("java.security.policy", "policy.url") loads a new policy.
Why it's wrong here
Only sets the property; explicit Policy refresh needed.
- ✓
The SecurityManager class is deprecated in Java 17.
Why this is correct
Deprecated since Java 18? Actually Java 17 already marks it deprecated.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
By default, Java 17 applications run with a SecurityManager installed.
Why it's wrong here
No default SecurityManager; must be enabled manually.
- ✓
A security policy file can contain grant entries for code sources.
Why this is correct
Policy files define permissions per code source.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
AccessController.doPrivileged() allows code to temporarily escalate privileges.
Why this is correct
Enables privileged code blocks with limited permissions.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse setting a system property with actually loading a policy, and they assume the SecurityManager is active by default in modern Java versions, when in fact it is deprecated and disabled by default since Java 17.
Detailed technical explanation
How to think about this question
The SecurityManager works with the AccessController and Policy classes to enforce sandbox security. The AccessController.doPrivileged() method (option E) allows a privileged code block to temporarily bypass the current security context's permissions, which is useful when trusted code needs to access a protected resource on behalf of untrusted code. The security policy file uses grant entries (option D) to specify permissions for code sources based on codebase URLs, signers, or principal names, following the syntax defined in the Java Security Architecture specification.
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
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FAQ
Questions learners often ask
What does this 1Z0-829 question test?
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: The SecurityManager class is deprecated in Java 17. — The SecurityManager class is deprecated for removal in Java 17 (JEP 411). This deprecation means that while the class still exists for compatibility, it is no longer recommended for use and may be removed in a future release. The core reasoning is that the SecurityManager architecture is considered legacy and difficult to maintain, so Oracle has deprecated it to encourage developers to adopt alternative security mechanisms.
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.
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Last reviewed: Jun 25, 2026
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