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| Section | Objectives |
|---|
| DevOps and Development Basics | - Version control concepts (Git basics) - CI/CD and automation fundamentals
|
| Linux Fundamentals | - File permissions and ownership - Basic Linux commands and filesystem navigation
|
| Security Fundamentals | - Authentication and authorization concepts - Basic firewall and system security practices
|
| System Administration Basics | - User and group management - Package management and software installation
|
| Cloud Computing Basics | - Basic cloud deployment concepts - Introduction to cloud service models (IaaS, PaaS, SaaS)
|
| Networking Fundamentals | - DNS, routing, and network troubleshooting - TCP/IP basics and common protocols
|
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Linux Foundation Certified IT Associat Sample Questions (Q86-Q91):
NEW QUESTION # 86
A Linux administrator is creating a limited-privilege environment for the user alice, who is part of the devops team. Their only job responsibility is to restart the nginx service on a web server, which of the following configurations best applies the principle of least privilege?
- A. echo 'alice ALL=(ALL) NOPASSWD:/bin/systemctl restart nginx' >> /etc/sudoers
- B. chmod +s /bin/systemctl
- C. usermod -aG sudo alice
- D. echo 'alice ALL=(ALL) NOPASSWD:ALL' >> /etc/sudoers
Answer: A
Explanation:
Granting the user explicit sudo permission for only systemctl restart nginx applies the principle of least privilege. Alice can perform her required task without gaining full administrative access or unnecessary privileges on the system, reducing security risks.
NEW QUESTION # 87
A Linux Administrator is reviewing a technical architecture diagram for a Linux-based web application deployed in a cloud environment. The diagram shows:
- A public subnet with a load balancer.
- Two Linux web servers in a private subnet, behind the load balancer.
- A database server in a separate private subnet, accessible only from
the web servers.
- Security groups applied to restrict traffic:
- Load balancer allows inbound traffic on port 80 and 443.
- Web servers allow inbound traffic only from the load balancer on
port 80.
- Database server allows inbound traffic only from the web servers
on port 3306.
Based on this architecture, which of the following statements is most accurate?
- A. The web servers are isolated from the internet and receive HTTP requests only through the load balancer.
- B. All components reside in the public subnet for easier access and scalability.
- C. Users on the internet can directly SSH into the web servers for administration.
- D. The database server is directly exposed to the internet to allow remote backups.
Answer: A
Explanation:
The web servers are deployed in a private subnet and their security group allows inbound traffic only from the load balancer on port 80. This means they are not directly reachable from the internet. External users connect to the load balancer in the public subnet, which forwards HTTP requests to the web servers, providing both security and scalability.
NEW QUESTION # 88
An administrator needs to list all listening TCP sockets and their associated port numbers without performing DNS resolution. Which command is most appropriate?
- A. ss -tuln
- B. dig -x 127.0.0.1
- C. traceroute localhost
- D. ping -c 4 localhost
Answer: A
Explanation:
The ss command with -t and -u displays TCP and UDP sockets, -l restricts output to listening sockets, and -n prevents name resolution so that numeric addresses and ports are shown. The remaining options test reachability or perform DNS lookups.
NEW QUESTION # 89
An organization wants to eliminate password-based SSH logins on its Linux servers. Which authentication method should be implemented?
- A. Kerberos ticket caching in /tmp
- B. Public key authentication with keys stored in ~/.ssh/authorized_keys
- C. Challenge-response authentication using PAM passwords
- D. Host-based authentication using /etc/hosts.allow
Answer: B
Explanation:
Public key authentication stores the user's public key in ~/.ssh/authorized_keys on the server while the private key remains protected on the client. This removes the need to transmit or store passwords and is significantly more resistant to brute-force attacks.
NEW QUESTION # 90
A script called backup.sh must run on a Linux server to perform a backup operation. The script should continue running even if the terminal session is closed. Which command will achieve this?
- A. nohup ./backup.sh &
- B. ./backup.sh
- C. ./backup.sh > /dev/null
- D. sudo ./backup.sh
Answer: A
Explanation:
nohup ./backup.sh & runs the script in the background and prevents it from receiving the hangup signal when the terminal session closes. This allows the backup process to continue running even after the user logs out or disconnects from the terminal.
NEW QUESTION # 91
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