The correct answer is `-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005`. This command-line option is required because it loads the Java Debug Wire Protocol (JDWP) agent directly into the JVM, enabling the Oracle Java Platform Debugger Architecture (JPDA) for remote debugging. The `transport=dt_socket` specifies TCP/IP sockets for network communication, `server=y` configures the JVM to listen for an incoming debugger, `suspend=n` allows the application to start without waiting for a debugger attachment, and `address=5005` sets the listening port. On the Oracle Java Foundations 1Z0-811 exam, this tests your understanding of JPDA remote debugging configuration, often appearing as a multiple-choice question where common traps include omitting `server=y` or using the deprecated `-Xdebug` and `-Xrunjdwp` flags. A reliable memory tip is to remember the acronym "TSSA"—Transport, Server, Suspend, Address—to recall the four key parameters in the correct order.
1Z0-811 Exception Handling and Development Tools Practice Question
This 1Z0-811 practice question tests your understanding of exception handling and development tools. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
A developer is using the Oracle Java Platform Debugger Architecture (JPDA) to debug a remote Java application. Which command-line option is required to start the application in debug mode listening on port 5005?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "which command"
Why it matters: Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
Option D is correct because the `-agentlib:jdwp` option is the modern, recommended way to enable the Java Debug Wire Protocol (JDWP) for remote debugging. It specifies the transport as `dt_socket` (TCP/IP sockets), sets the JVM as the debug server (`server=y`), does not suspend the application on startup (`suspend=n`), and listens on port 5005 (`address=5005`). This is the standard JPDA configuration for attaching a debugger to a running Java application.
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.
✗
-javaagent:debug.jar=port=5005
Why it's wrong here
This is used for Java agents, not the JDWP debugger.
This is the correct and current syntax for enabling debugging with JDWP.
Clue confirmation
The clue word "which command" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Oracle often tests the distinction between deprecated `-Xdebug -Xrunjdwp` and the modern `-agentlib:jdwp` syntax, and candidates may mistakenly choose the deprecated option because it was widely used in older Java versions.
Detailed technical explanation
How to think about this question
The `-agentlib:jdwp` option loads the JDWP agent library (libjdwp.so on Linux, jdwp.dll on Windows) which implements the Java Debug Wire Protocol. The `transport=dt_socket` parameter uses TCP sockets for communication, while `dt_shmem` (shared memory) is an alternative for local debugging on Windows. The `suspend=n` parameter is critical in production scenarios to avoid halting the application until a debugger attaches; setting `suspend=y` would pause the JVM at startup until a debugger connects, which is useful for debugging initialization 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.
Exception Handling and Development Tools — This question tests Exception Handling and Development Tools — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005 — Option D is correct because the `-agentlib:jdwp` option is the modern, recommended way to enable the Java Debug Wire Protocol (JDWP) for remote debugging. It specifies the transport as `dt_socket` (TCP/IP sockets), sets the JVM as the debug server (`server=y`), does not suspend the application on startup (`suspend=n`), and listens on port 5005 (`address=5005`). This is the standard JPDA configuration for attaching a debugger to a running Java application.
What should I do if I get this 1Z0-811 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "which command". Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
This 1Z0-811 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 1Z0-811 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.