Lpi 303-300 Practice Exams
Last updated on Oct 22,2026- Exam Code: 303-300
- Exam Name: LPIC-3 Security
- Certification Provider: Lpi
- Latest update: Oct 22,2026
An X509 certificate contains the following information:
X509v3 Basic Constraints: critical CA:TRUE, pathlen:0
Which of the following statements are true regarding the certificate?
(Choose THREE correct answers.)
- A . This certificate belongs to a certification authority.
- B . This certificate may be used to sign certificates of subordinate certification authorities.
- C . This certificate may never be used to sign any other certificates.
- D . This certificate may be used to sign certificates that are not also a certification authority.
- E . This certificate will not be accepted by programs that do not understand the listed extension.
Which tool can be used to check for rootkits on a Linux system?
- A . chkrootkit
- B . AIDE
- C . OpenSCAP
- D . rpm
Which of the following DNS records are used in DNSSEC?
- A . MX
- B . TXT
- C . RRSIG
- D . PTR
Which of the following DNS record types can the command dnssec-signzone add to a zone?
(Choose THREE correct answers.)
- A . ASIG
- B . NSEC
- C . NSEC3
- D . NSSIG
- E . RRSIG
Which of the following database names can be used within a Name Service Switch (NSS) configuration file?(Choose THREE correct answers).
- A . host
- B . shadow
- C . service
- D . passwd
- E . group
What is the purpose of DNS over TLS and DNS over HTTPS?
- A . To improve DNS performance
- B . To provide secure communication between DNS clients and servers
- C . To reduce DNS query times
- D . To allow DNS servers to communicate securely with each other
Which of the following keywords are built-in chairs for the iptables nat table?
(Choose THREE correct answers.)
- A . OUTPUT
- B . MASQUERADE
- C . PROCESSING
- D . POSTROUTING
- E . PREROUTING
What is the purpose of NSEC3 in DNSSEC?
- A . To provide information about DNSSEC key signing keys
- B . To prevent zone enumeration
- C . To authenticate a DNS server
- D . To sign a DNS zone
What is the difference between a SetUID and SetGID bit?
- A . SetUID applies to files, while SetGID applies to directories
- B . SetUID allows a file to be executed with the permissions of the file owner, while SetGID allows a file to be executed with the permissions of the group owner
- C . SetUID allows a user to change the owner of a file, while SetGID allows a user to change the group owner of a file
- D . There is no difference between SetUID and SetGID
Which file is used to configure rkhunter?
- A . /etc/rkhunter.conf
- B . /etc/audit/auditd.conf
- C . /etc/aide/aide.conf
- D . /etc/maldet.conf