CompTIA Linux+ Practice Test 9

CompTIA Linux+ Practice Test

1 / 10

A backup script fails because /mnt/backup isn’t mounted at boot. /etc/fstab has the entry, but it’s skipped. What’s the likely fix?

2 / 10

A user reports slow performance. top shows high "wa" (wait) values. Which command identifies the bottleneck?

3 / 10

After updating a kernel parameter in /etc/sysctl.conf, the change isn’t active. Which command applies it without rebooting?

4 / 10

A server’s network drops intermittently. ip addr show eth0 shows "UP," but pings fail. Which command checks for packet loss?

5 / 10

A process is stuck, and kill -15 3456 doesn’t stop it. Logs indicate it’s waiting on I/O. Which command forces termination?

6 / 10

A web server fails to start after a config change to /etc/nginx/nginx.conf. Which command tests the file for syntax errors?

7 / 10

A user’s cron job, 0 2 * * * /backup.sh, isn’t running, and logs show "permission denied." The script permissions are rwxr-xr-x. What’s the fix?

8 / 10

After adding a new disk, /dev/sdb, it’s not visible in lsblk. Which command makes it available without rebooting?

9 / 10

A server’s /var/log/syslog shows repeated "disk full" errors, but df -h indicates 20% free space. What’s the likely issue, and which command investigates?

10 / 10

A junior admin ran chmod -R 777 /etc by mistake, compromising security. Which command restores typical permissions to the /etc directory?

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