UNIX SYSTEM ADMINISTRATOR CERTIFICATION EXAM COMPLETE PRACTICE TEST
BANK QUESTIONS AND ANSWERS | VERIFIED SOLUTIONS | UPDATED 2026/2027
STUDY GUIDE
Examiner/Administrator: Industry-Aligned UNIX/Linux Systems Administration
Certification Preparation Framework
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UNIX SYSTEM ADMINISTRATOR CERTIFICATION EXAM
2026/2027 EDITION
━━━━━━━━━━━━━━━━━━━━━━━━━━━━
COMPLETE PRACTICE EXAM
100+ MULTIPLE-CHOICE QUESTIONS
PASSING SCORE: 70%
TESTING TIME: 120 MINUTES
━━━━━━━━━━━━━━━━━━━━━━━━━━━━
TABLE OF CONTENTS
UNIX SYSTEM ARCHITECTURE
FILESYSTEM MANAGEMENT
USER AND GROUP ADMINISTRATION
PROCESS MANAGEMENT
PERMISSIONS AND SECURITY
SHELL ENVIRONMENT AND SCRIPTING
NETWORK CONFIGURATION
SYSTEM STARTUP AND SERVICES
BACKUP AND RECOVERY
SYSTEM MONITORING AND TROUBLESHOOTING
UNIX SYSTEM ADMINISTRATION CERTIFICATION BODY || ALIGNED WITH CURRENT
INDUSTRY BLUEPRINTS || SYSTEM ADMINISTRATION OPERATIONS || PROFESSIONAL
STUDY GUIDE || 100% VERIFIED | GRADED A+ || COMPREHENSIVE EXAM
PREPARATION || PREPARED FOR CERTIFICATION & PROFESSIONAL ASSESSMENT ||
PROFESSIONAL EXAMINATION USE
,UNIX SYSTEM ARCHITECTURE & FILESYSTEM MANAGEMENT
Q1. A UNIX administrator discovers that a production application cannot write to a
mounted filesystem despite sufficient free space being reported by df . Investigation
reveals that all available inodes have been consumed. Which action most directly
resolves the issue?
A. Increase swap allocation
B. Delete unnecessary files and free inodes
C. Remount the filesystem as read-write
D. Rebuild the kernel
Correct Answer: 🔴 B. Delete unnecessary files and free inodes
Explanation: 🔹 Inodes store metadata for files. A filesystem can run out of inodes even
when disk blocks remain available. Removing unnecessary files frees inode entries and
restores file creation capability. Swap allocation, remounting, or kernel rebuilding do
not address inode exhaustion.
Q2. An administrator must determine which filesystem is mounted on /var . Which
command provides this information most reliably?
A. ps -ef
B. who
C. mount
D. uname -a
Correct Answer: 🔴 C. mount
Explanation: 🔹 The mount command displays active mounted filesystems and their
mount points. It allows administrators to identify which device or filesystem
backs /var . The other commands provide process, user, or kernel information.
Q3. A filesystem check is required on a UNIX server after an improper shutdown.
Which utility is commonly used to verify and repair filesystem consistency?
,A. grep
B. tar
C. fsck
D. passwd
Correct Answer: 🔴 C. fsck
Explanation: 🔹 fsck (File System Consistency Check) identifies and repairs filesystem
corruption. It is a standard administrative tool following crashes or unclean shutdowns.
The remaining utilities serve unrelated purposes.
Q4. A storage volume must be mounted automatically at boot. Which configuration
file should be updated?
A. /etc/hosts
B. /etc/fstab
C. /etc/group
D. /etc/profile
Correct Answer: 🔴 B. /etc/fstab
Explanation: 🔹 /etc/fstab contains filesystem mount definitions used during system
startup. Proper entries ensure automatic mounting. The other files manage networking,
groups, and shell environments.
Q5. Which command displays available and used disk space in human-readable
format?
A. df -h
B. ls -l
C. du -a
D. find
Correct Answer: 🔴 A. df -h
, Explanation: 🔹 df -h presents filesystem utilization using readable units such as GB
and MB. It is commonly used for capacity monitoring. ls, du, and find serve different
purposes.
Q6. A mission-critical application stores transaction logs under /logs . To prevent
accidental deletion, the administrator wants a filesystem mounted as read-only
except during maintenance windows. Which mount option should be used?
A. rw
B. exec
C. ro
D. suid
Correct Answer: 🔴 C. ro
Explanation: 🔹 The ro option mounts a filesystem read-only, preventing modifications.
This protects critical data from accidental changes. rw enables writes, while exec and
suid govern execution behavior.
Q7. Which command determines the amount of disk space consumed by a specific
directory tree?
A. du -sh directory
B. pwd
C. whoami
D. cat
Correct Answer: 🔴 A. du -sh directory
Explanation: 🔹 du measures disk usage, and the -sh options summarize results in a
human-readable format. This is ideal for identifying large directories. The other
commands provide unrelated information.
BANK QUESTIONS AND ANSWERS | VERIFIED SOLUTIONS | UPDATED 2026/2027
STUDY GUIDE
Examiner/Administrator: Industry-Aligned UNIX/Linux Systems Administration
Certification Preparation Framework
━━━━━━━━━━━━━━━━━━━━━━━━━━━━
UNIX SYSTEM ADMINISTRATOR CERTIFICATION EXAM
2026/2027 EDITION
━━━━━━━━━━━━━━━━━━━━━━━━━━━━
COMPLETE PRACTICE EXAM
100+ MULTIPLE-CHOICE QUESTIONS
PASSING SCORE: 70%
TESTING TIME: 120 MINUTES
━━━━━━━━━━━━━━━━━━━━━━━━━━━━
TABLE OF CONTENTS
UNIX SYSTEM ARCHITECTURE
FILESYSTEM MANAGEMENT
USER AND GROUP ADMINISTRATION
PROCESS MANAGEMENT
PERMISSIONS AND SECURITY
SHELL ENVIRONMENT AND SCRIPTING
NETWORK CONFIGURATION
SYSTEM STARTUP AND SERVICES
BACKUP AND RECOVERY
SYSTEM MONITORING AND TROUBLESHOOTING
UNIX SYSTEM ADMINISTRATION CERTIFICATION BODY || ALIGNED WITH CURRENT
INDUSTRY BLUEPRINTS || SYSTEM ADMINISTRATION OPERATIONS || PROFESSIONAL
STUDY GUIDE || 100% VERIFIED | GRADED A+ || COMPREHENSIVE EXAM
PREPARATION || PREPARED FOR CERTIFICATION & PROFESSIONAL ASSESSMENT ||
PROFESSIONAL EXAMINATION USE
,UNIX SYSTEM ARCHITECTURE & FILESYSTEM MANAGEMENT
Q1. A UNIX administrator discovers that a production application cannot write to a
mounted filesystem despite sufficient free space being reported by df . Investigation
reveals that all available inodes have been consumed. Which action most directly
resolves the issue?
A. Increase swap allocation
B. Delete unnecessary files and free inodes
C. Remount the filesystem as read-write
D. Rebuild the kernel
Correct Answer: 🔴 B. Delete unnecessary files and free inodes
Explanation: 🔹 Inodes store metadata for files. A filesystem can run out of inodes even
when disk blocks remain available. Removing unnecessary files frees inode entries and
restores file creation capability. Swap allocation, remounting, or kernel rebuilding do
not address inode exhaustion.
Q2. An administrator must determine which filesystem is mounted on /var . Which
command provides this information most reliably?
A. ps -ef
B. who
C. mount
D. uname -a
Correct Answer: 🔴 C. mount
Explanation: 🔹 The mount command displays active mounted filesystems and their
mount points. It allows administrators to identify which device or filesystem
backs /var . The other commands provide process, user, or kernel information.
Q3. A filesystem check is required on a UNIX server after an improper shutdown.
Which utility is commonly used to verify and repair filesystem consistency?
,A. grep
B. tar
C. fsck
D. passwd
Correct Answer: 🔴 C. fsck
Explanation: 🔹 fsck (File System Consistency Check) identifies and repairs filesystem
corruption. It is a standard administrative tool following crashes or unclean shutdowns.
The remaining utilities serve unrelated purposes.
Q4. A storage volume must be mounted automatically at boot. Which configuration
file should be updated?
A. /etc/hosts
B. /etc/fstab
C. /etc/group
D. /etc/profile
Correct Answer: 🔴 B. /etc/fstab
Explanation: 🔹 /etc/fstab contains filesystem mount definitions used during system
startup. Proper entries ensure automatic mounting. The other files manage networking,
groups, and shell environments.
Q5. Which command displays available and used disk space in human-readable
format?
A. df -h
B. ls -l
C. du -a
D. find
Correct Answer: 🔴 A. df -h
, Explanation: 🔹 df -h presents filesystem utilization using readable units such as GB
and MB. It is commonly used for capacity monitoring. ls, du, and find serve different
purposes.
Q6. A mission-critical application stores transaction logs under /logs . To prevent
accidental deletion, the administrator wants a filesystem mounted as read-only
except during maintenance windows. Which mount option should be used?
A. rw
B. exec
C. ro
D. suid
Correct Answer: 🔴 C. ro
Explanation: 🔹 The ro option mounts a filesystem read-only, preventing modifications.
This protects critical data from accidental changes. rw enables writes, while exec and
suid govern execution behavior.
Q7. Which command determines the amount of disk space consumed by a specific
directory tree?
A. du -sh directory
B. pwd
C. whoami
D. cat
Correct Answer: 🔴 A. du -sh directory
Explanation: 🔹 du measures disk usage, and the -sh options summarize results in a
human-readable format. This is ideal for identifying large directories. The other
commands provide unrelated information.
