Sample Questions and Answers
What is the main benefit of using a UPS with a server?
A) Faster data transfer
B) Redundancy for CPUs
C) Protection from power interruptions
D) Automatic system updates
Answer: C) Protection from power interruptions
Explanation: An Uninterruptible Power Supply (UPS) provides backup power during outages and prevents data loss or hardware damage due to sudden shutdowns. It also gives administrators time to shut down systems gracefully.
What command in Linux is used to change a file’s permissions?
A) sudo
B) passwd
C) chmod
D) mkdir
Answer: C) chmod
Explanation: chmod (change mode) modifies file and directory permissions in Linux. It is critical for server security, ensuring that only authorized users can read, write, or execute files as intended.
Why is air containment important in data centers?
A) Prevents unauthorized access
B) Keeps humidity low
C) Improves cooling efficiency
D) Increases floor space
Answer: C) Improves cooling efficiency
Explanation: Air containment systems (hot aisle/cold aisle) help direct airflow, reducing mixing of hot and cold air. This improves cooling efficiency, lowers energy costs, and extends the life of server hardware.
What is an LTO drive used for?
A) Remote login
B) High-speed internet access
C) Long-term data backup and archiving
D) Running virtual machines
Answer: C) Long-term data backup and archiving
Explanation: LTO (Linear Tape-Open) drives are used for high-capacity, reliable, and cost-effective data backups and archival storage. They are ideal for compliance and disaster recovery scenarios in enterprise environments.
Which port does HTTPS use by default?
A) 20
B) 21
C) 443
D) 80
Answer: C) 443
Explanation: HTTPS (HyperText Transfer Protocol Secure) uses port 443 by default to provide encrypted communication between servers and clients. It ensures secure data transmission over the web.
What is the primary reason to implement server clustering?
A) Minimize hardware
B) Improve system cooling
C) Provide high availability
D) Increase software updates
Answer: C) Provide high availability
Explanation: Server clustering connects multiple servers to function as a single system, ensuring that if one server fails, others can take over. This increases uptime and is crucial for critical applications.
A technician wants to ensure only specific MAC addresses can access the server switch. What should they enable?
A) VLAN tagging
B) Port security
C) SNMP
D) QoS
Answer: B) Port security
Explanation: Port security restricts switch port access based on MAC addresses, preventing unauthorized devices from connecting to the network. It’s an effective method to enhance physical network security in server environments.
Which command in Windows shows active TCP connections?
A) tracert
B) netstat
C) nslookup
D) arp
Answer: B) netstat
Explanation: netstat displays active TCP/UDP connections, listening ports, and network statistics. It’s essential for troubleshooting network performance, detecting unauthorized connections, and verifying open services on servers.
What is the role of a DHCP server?
A) Routes internet traffic
B) Resolves domain names
C) Assigns IP addresses dynamically
D) Encrypts VPN connections
Answer: C) Assigns IP addresses dynamically
Explanation: A DHCP (Dynamic Host Configuration Protocol) server automatically assigns IP addresses and related network configuration to devices on a network. It simplifies management and reduces configuration errors.
What is the purpose of a server’s firmware update?
A) Increases network speed
B) Enhances hardware compatibility and security
C) Replaces the operating system
D) Updates application software
Answer: B) Enhances hardware compatibility and security
Explanation: Firmware updates improve hardware functionality, patch security vulnerabilities, and ensure compatibility with newer operating systems and components. Keeping server firmware current is critical for stability and protection.
What does a POST failure during boot usually indicate?
A) OS not found
B) Application crash
C) Hardware malfunction
D) Driver incompatibility
Answer: C) Hardware malfunction
Explanation: POST (Power-On Self-Test) checks essential hardware during startup. Failures typically point to issues like faulty RAM, CPU, motherboard, or peripheral connections, and often present as beep codes or display errors.
A server consistently shows high CPU usage from a single application. What’s the best solution?
A) Disable firewall
B) Uninstall the OS
C) Analyze and optimize or limit the application
D) Replace the hard drive
Answer: C) Analyze and optimize or limit the application
Explanation: Persistent high CPU usage by one application may indicate a memory leak, inefficient coding, or overutilization. Administrators should investigate logs, update or reconfigure the application, or set CPU limits using process management tools.
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