JNCIA-JUNOS Junos Configuration Basics Practice Question
This JNCIA-JUNOS practice question tests your understanding of junos configuration basics. 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.
Which TWO statements about configuration storage in Junos are true?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The rescue configuration is stored in /config/rescue.conf.gz.
Option A is correct because the rescue configuration is stored as a compressed file at /config/rescue.conf.gz on Junos devices. This configuration is saved using the 'request system configuration rescue save' command and can be loaded with 'rollback rescue' to recover from a configuration that prevents the device from booting properly.
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.
✓
The rescue configuration is stored in /config/rescue.conf.gz.
Why this is correct
Rescue configuration is a special saved configuration.
Related concept
Read the scenario before looking for a memorised answer.
✗
The rollback configurations are stored in /config/juniper.conf.0.gz, .1.gz, etc.
Why it's wrong here
Rollback files are in /var/db/config/rollback-*.
✓
The active configuration is stored in /config/juniper.conf.gz.
Why this is correct
This is the file for the committed configuration.
Related concept
Read the scenario before looking for a memorised answer.
✗
The candidate configuration is stored in /config/.
Why it's wrong here
Candidate is stored in /var/db/config.
✗
The factory default configuration is stored in /etc/config/.
Why it's wrong here
Factory default is in /etc/config/, but the rescue config is different.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse the numbering of rollback files (thinking .0.gz is a rollback instead of the active configuration) or assume the candidate configuration is stored persistently on disk rather than existing only in memory until committed.
Detailed technical explanation
How to think about this question
Junos maintains up to 50 previous committed configurations as rollback files (juniper.conf.1.gz through .50.gz) in the /config/ directory, each compressed with gzip. The active configuration is always stored as /config/juniper.conf.gz, and when a commit occurs, the previous active configuration is shifted to .1.gz, and so on. The rescue configuration is a special saved state that survives even if all rollback files are cleared, making it a critical recovery tool for scenarios like a misconfigured management interface.
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 practitioner preparing for the JNCIA-JUNOS exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
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.
Junos Configuration Basics — This question tests Junos Configuration Basics — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The rescue configuration is stored in /config/rescue.conf.gz. — Option A is correct because the rescue configuration is stored as a compressed file at /config/rescue.conf.gz on Junos devices. This configuration is saved using the 'request system configuration rescue save' command and can be loaded with 'rollback rescue' to recover from a configuration that prevents the device from booting properly.
What should I do if I get this JNCIA-JUNOS 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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This JNCIA-JUNOS practice question is part of Courseiva's free Juniper Networks 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 JNCIA-JUNOS exam.
Question Discussion
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