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.
Which TWO statements are true about securing a Java application?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
A security policy file can grant specific permissions to code from a particular codebase.
Option A is correct because a Java security policy file can use a codebase URL (e.g., `codeBase "file:/path/to/jar"`) to grant specific permissions, such as `java.io.FilePermission`, to code loaded from that location. This is a core feature of the Java security model, allowing fine-grained access control based on where the code originates.
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.
✓
A security policy file can grant specific permissions to code from a particular codebase.
Read the scenario before looking for a memorised answer.
✗
Enabling the security manager is required for all Java applications.
Why it's wrong here
Security manager is optional; many applications run without it.
✗
The Java Cryptography Extension (JCE) is deprecated and should not be used.
Why it's wrong here
JCE is still part of Java SE and not deprecated.
✗
Using code signing guarantees that the application is secure.
Why it's wrong here
Code signing verifies origin but does not enforce security policy.
✓
The SecurityManager class can be used to set a security policy for the application.
Why this is correct
SecurityManager enforces access controls based on policy.
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 the optional nature of the SecurityManager (thinking it is mandatory) or assume code signing implies security, when in fact it only provides integrity and origin verification, not safety.
Detailed technical explanation
How to think about this question
Under the hood, the SecurityManager works with `AccessController` to check permissions against the effective policy, which can be defined via a policy file using the `-Djava.security.policy` JVM argument. In real-world scenarios, a policy file might grant `java.net.SocketPermission` to a specific codebase to allow network access while denying it to others, enabling sandboxing of untrusted plugins. The deprecation of SecurityManager in Java 17 (JEP 411) means future applications should rely on alternative mechanisms like module system boundaries or container-level security.
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 small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
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: A security policy file can grant specific permissions to code from a particular codebase. — Option A is correct because a Java security policy file can use a codebase URL (e.g., `codeBase "file:/path/to/jar"`) to grant specific permissions, such as `java.io.FilePermission`, to code loaded from that location. This is a core feature of the Java security model, allowing fine-grained access control based on where the code originates.
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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Question Discussion
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