Free 303-200: LPIC-3 Exam 303: Security, version 2.0 Exam Questions and Answers
LPIC-3 Exam 303: Security, version 2.0 (303-200) is an LPI certification exam. This page has free 303-200 practice questions with answers and explanations, set out the way the real exam asks them, plus a timed 303-200 practice test that scores you against the pass mark.
Candidates comparing 303-200 exam dumps, ExamTopics and other 303-200 practice tests use this page for the answers and explanations behind each question. Download the free 303-200 PDF, then sit the timed 303-200 exam simulation before booking with LPI.
Last updated: October 30, 2026
- Exam code
- 303-200
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- LPI
- Questions in our bank
- 1000+
- Free to read
- First 10, with answers
- Our test mode duration & pass mark
- 130 mins · 70%
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Question #1
Which of the following PAM control flags causes the authentication process to fail immediately, without processing any further modules of the stack, when its module returns a failure?
Correct answer: D
Explanation
With requisite, a failing module ends the stack at once and the failure is returned to the application. The flag required also leads to an overall failure, but the remaining modules of the stack are still processed before the result is returned.
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Question #2
Which of the following commands verifies that the certificate in the file client.pem was issued by a CA whose certificate is contained in the file ca.pem?
Correct answer: B
Explanation
openssl verify with -CAfile validates the certificate chain against the trusted CA certificates in the given file. The req subcommand only checks the self-signature of a signing request, and s_verify is not an openssl subcommand.
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Question #3
Which of the following commands generates a 2048 bit RSA key signing key (KSK) for the zone example.org?
Correct answer: B
Explanation
The flag -f KSK sets the key signing key flag, and -n ZONE makes it a key owned by a zone. Without -f KSK the command creates a zone signing key. The option -t selects the key type (AUTH, CONF, NOAUTH, NOCONF), and -n USER creates a key for a user entity.
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Question #4
In case /etc/crypttab contains the following line: secure /dev/sdb1 none luks What is the effect of the value none in the third field?
Correct answer: C
Explanation
The third field of /etc/crypttab names a key file. The value none means there is no key file, so the passphrase is asked for interactively when the mapping is set up. Automatic unlocking is only prevented by the noauto option.
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Question #5
Which command enrolls a host as a client in an existing FreeIPA domain? (Specify ONLY the command without any path or parameters.)
Type your answer, then reveal.
Correct answer: ipa-client-install
Explanation
ipa-client-install configures the local host, including Kerberos, SSSD and the certificate setup, and joins it to the FreeIPA domain. ipa-server-install is its counterpart for creating a FreeIPA server.
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Question #6
Which of the following values of the X.509 extended key usage extension allows a certificate to be used to authenticate a TLS web server?
Correct answer: C
Explanation
The value serverAuth marks a certificate as usable for TLS web server authentication. clientAuth is the value for authenticating a client to a server, and the other values cover signing code, protecting email and time stamping.
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Question #7
Which of the following command lines makes Snort load and validate the configuration file /etc/snort/snort.conf and its rules, report the result and exit without starting to inspect traffic?
Correct answer: D
Explanation
The -T option puts Snort in self-test mode: it parses the configuration and rules, reports whether they are valid and then exits. The -D option starts Snort as a daemon that inspects traffic, -N only turns off packet logging, -q only suppresses banner output, and -V merely prints the version.
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Question #8
Which of the following sysctl keys controls address space layout randomization (ASLR) for the memory mappings of processes?
Correct answer: B
Explanation
kernel.randomize_va_space selects the ASLR mode, where 2 randomizes stack, mmap, VDSO and heap addresses. kptr_restrict hides kernel pointers, ptrace_scope limits process tracing, perf_event_paranoid limits performance events and unprivileged_bpf_disabled restricts BPF for unprivileged users. All are hardening settings but none controls ASLR.
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Question #9
Which of the following values of the NFS mount option sec= provides Kerberos authentication, integrity protection and encryption of the NFS traffic?
Correct answer: A
Explanation
krb5p is the Kerberos privacy flavor, which authenticates users, checks integrity and encrypts the traffic. krb5 only authenticates, krb5i adds integrity checking without encryption, sys relies on client-supplied UIDs and GIDs, and none maps all access to the anonymous user.
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Question #10
Which of the following commands adds a default ACL entry to the directory /srv/share so that objects created within it afterwards grant the group groupa read and write permissions?
Correct answer: C
Explanation
The -d option operates on the default ACL, which new files and directories inherit. Without -d, -m only changes the access ACL, and -R merely applies it recursively to existing objects. The setgid bit from chmod g+s only sets group ownership of new objects, and -x removes an entry.
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FAQ
Learn More: https://www.lpi.org/our-certifications/
- Q1: What is the 303-200: LPIC-3 Exam 303: Security, version 2.0 exam?
- A: 303-200: LPIC-3 Exam 303: Security, version 2.0 is a LPI certification exam. Judging by the questions in our bank, it concentrates on commands, freelpa, openssl, afile and selinux.
- Q2: What topics does the 303-200: LPIC-3 Exam 303: Security, version 2.0 exam cover?
- A: Questions in our 303-200: LPIC-3 Exam 303: Security, version 2.0 bank cluster around commands, freelpa, openssl, afile, selinux, ADDS, certificate and keys. Working through the full set is the quickest way to find which of these you are weakest on.
- Q3: How should I prepare for 303-200: LPIC-3 Exam 303: Security, version 2.0?
- A: Work through the 303-200: LPIC-3 Exam 303: Security, version 2.0 practice questions here, checking your answer on each one, then sit the practice test to rehearse the exam under timed conditions before the real thing.
- Q4: Are these real 303-200: LPIC-3 Exam 303: Security, version 2.0 exam questions?
- A: They are drawn from officially released past questions and from community members who have sat 303-200: LPIC-3 Exam 303: Security, version 2.0. Answers are verified and updated weekly.
- Q5: Where do I register for the 303-200: LPIC-3 Exam 303: Security, version 2.0 exam?
- A: Register through LPI directly. Exampractice is not affiliated with LPI and does not administer the exam.
- Q6: Is there a free 303-200: LPIC-3 Exam 303: Security, version 2.0 sample?
- A: Yes. Every 303-200: LPIC-3 Exam 303: Security, version 2.0 page shows a free sample of real questions. Upgrading opens the full bank and the practice test.