Trắc Nghiệm về Linux

1.What is the most popular file system choice? A. ext2 B. bsdf C. jfs D. ext3 Answer:A 2.What steps need to be performed, to make a new disk accessible to users? Select three. A. fdisk B. mkfs C. mount D. stat E. quotaon Answer:A, B, C 3.WhichTHREE of the following commands are used when setting up and accessing a new filesystem on the hard drive? A. fsck B. mkfs C. mount D. fdisk E. format Answer: B, C D 4.The command mkfs -t ext3 /dev/hdb1 -Tlargefile creates what size of inode? A. 4 kilobyte B. 1 megabyte C. 2 megabyte D. 4 megabyte Answer: E 5.Which command will show the number of free and used inodes for your system`s mounted file systems? A. du -i B. df -i C. ls -iR / D. freeinodes Answer: B 6.How many inodes are assigned to a file when it is created? A. 1 B. 2 C. 4 D. 8 Answer:A 7.What command with switches will display the disk utilization for all mounted file systems? A. df B. vmstat C. du D. top E. free Answer:A 8.What command with options will show the currently mounted filesystems usage in kilobytes? A. df -k B. df -h C. du -k D. du -h E. du -s Answer:A 9.Which of the following commands will print the inode usage on each mounted filesystem? A. du -i B. df -i C. lsfs -i D. printfs -i Answer: B 10.You need to create a symbolic link in the current user`s home directory named Certkiller to the file /data/foobar. Choose the command that will accomplish this. A. link . Certkiller /data/foobar B. ln /data/foobar $HOME/ Certkiller C. ln -s /data/foobar ~/ Certkiller D. file --link ./ Certkiller /data/foobar E. None of the above Answer: C 11.Which chown command will change the ownership to foo and the group to bar on a file named biglist? A. chown foo/bar biglist B. chown -u foo -g bar biglist C. chown foo:bar biglist D. chown --user foo --group bar biglist Answer: C 12.You have the following file: -rwxrwxr-x 1 foo root 0 Feb 23 07:48 /bin/foo Which of the following commands will change the owner of the file /bin/foofrom the foo userto the bar user without affecting group ownership? A. chown /bin/foo bar B. chown bar /bin/foo C. chown bar.foo /bin/foo D. chown.foo.bar /bin/foo Answer: B 13.Which of the following commands makes /bin/foo executable by everyone but only writable by its owner? A. chmod 557 /bin/foo B. chmod o +rwx, a+rx /bin/foo C. chown 557 /bin/foo D. chmod 755 /bin/foo Answer: D 14.You need to alter the permissions on the directory /home/mrbill and all it`s contents to match the following permissions. drwxr--r--Which of these commands with options and arguments will accomplish this? Choose two. A. chmod 0744 /home/mrbill -R B. chmod 744 /home/mrbill/* C. chmod -R u=rwx,g=r,o=r /home/mrbill D. chmod u+rwx,g+r,o+r /home/mrbill Answer:A, C 15.What umask will set the file permissions on a newly created file to -rw-r--r-- (644)? A. 0002 B. 0022 C. 0224 D. 0246 Answer: B 16.You want the default permissions for your files to be -rw-r----- . HOW must you set umask? A. 037 B. 640 C. 038 D. 027 Answer:A 17.After creating a new file, you notice that the permissions of the new file are -rw-rw-rw-. From this, you know that the value of the umask is what? A. 023 B. 000 C. 112 D. d111 E. 223 Answer: B 18.What are the default permissions for the Red Hat /etc/passwd file? A. 644 B. 640 C. 400 D. 641 E. 440 Answer:A 19.Which of the following are required in the /etc/passwd file when creating a user account? (Choose all that apply) A. login name B. userid C. default group D. password age E. minimum password length Answer:A, B, C 20.Which file contains information about filesystems and their respective mount points? A. /etc/mount B. /etc/fs_mount C. /etc/fstab D. /proc/fstab Answer: C 21.Which of the following programs can be used to the find the foo program in the.PATH and associated man pages, but not list every file containing foo on the system? A. which B. search C. slocate D. where E. whereis Answer: E 22.What command can be used to cause changes to the inittab file to take effect without a system reboot? A. init q B. init r C. inittab r D. inittab q Answer:A 23. Which of the following is a journaling filesystem?A. ext2 B. vfat C. minix D. ext3 Answer: D 24. The first ethernet card on a system is:A. eth0 B. etho0 C. eth1 D. hme0 Answer:A 25. You can find all of the services managed by xinetd by looking at which of the following file or directory? A. /etc/xinetd.d B. /etc/inetd.conf C. /etc/rc.d/init.d D. /etc/xinetd.conf Answer:A 26.What partition number always refers to the first logical partition? A. 0 B. 4 C. 1 D. 5 Answer: D 27.Which of the following files specifies information on what is NFS shared on your system? A. /etc/exports B. /etc/dfs/dfstab C. /etc/fstab D. /etc/sharetab Answer:A 28. What command could be used to find out which package owns the file /etc/aliases? A. rpm -qf /etc/aliases B. rpm -qp /etc/aliases C. rpm -e /etc/aliases D. rpm -qil /etc/aliases Answer:A 29. Which of these commands will list PCI devices? A. lsdevices B. lspci C. lsdev D. pcidev Answer: B 30. What command could be used to find all packages with the string `mail` within the package name? A. find / -name `*mail*` B. rpm -qf /usr/bin/mail C. rpm -qa | grep mail D. locate mail Answer: C 31. On a system with 16MB RAM, the minimum size of your swap partition should be equal to how many MBs? A. 16 B. 32 C. 64 D. 100 Answer: B 32. On a new Linux installation, the partition mounted on where contains the operating system kernel?A. /boot B. /dev C. /kernel D. /bin Answer:A 33. A Linux server installation requires how many GB of free space for a minimal installation where no graphical display is ever needed?A. 0.8 B. 0.5 C. 1.1 D. 1.5 Answer: D 34. When init starts, it first runs which of the following scripts? A. /etc/rc.d/rc.sysinit B. /etc/rc.d/rc.sysinit0 C. /etc/rc.d/rc.sysinit1 D. /etc/rc.d/sysinit0 Answer:A 35. What file contains the default environment variables when using the bash shell? A. ~/.profile B. /bash C. /etc/profile D. ~/bash Answer: C 36. What is the usual mode for the /tmp directory?A. 0777 B. 0755 C. 7777 D. 1777 Answer: D 37. The netstat –r command produces the following output: 192.168.10.0 * 255.255.255.0 U 40 0 0 eth1 Which of the following best describes this line? A. 192.168.10.0 ISAGateway (G) to all external (*) networks. B. the host, 192.168.10.0, is currently up (U). C.There are currently 40 packets waiting for transmission over this route. D. The network, 192.168.10, is accessible through the local NIC configured as eth1. Answer:A 38. All of the following commands can be used to determine openTCPports an localhost EXCEPT:A. lsof B. netstat C. nmap D. fuser E. ifconfig Answer: E 39. How would you display your system’s currentARP cache? A. arp –a B. netstat –a C. netstat –arp D. cat /ect/arp Answer:A 40.Your organization has opened a new office on a different floor, and the computers that will be installed there will be on a new network, 192.168.1.0/24. ALinux gateway having the address 192.168.0.2 on your local network will route traffic between the two subnets. Which invocation of the ‘route’ command will properly reconfigure your firewall (address 192.168.0.1) so that it can communicate with the new subnet? A. route add 192.168.1.0/24 192.168.0.2 B. route add .net 192.168.1.0 netmask 255.255.255.0 gw 192.168.0.2 C. route add 192.168.1.0 netmask 24 gw 192.168.0.2 D. route add –net 192.168.1.0/24 192.168.0.2/32 E. route add 192.168.1.0/255.255.255.0 gw 192.168.0.2 Answer: E 41.You have created special configuration files that you want copied to each user’s home directories when creating a new user accounts.You copy the files to /etc/skel. Which of the following commands will make this happen? A. useradd –m username B. useradd –mk username C. useradd –k username D. useradd –Dk username Answer: B 41.You have entered the following cronjob.When will it run? 15 * * * 1. 3. 5 myscript A. At 15 minutes after every hour on the 1st, 3rd and 5th of each month. B.At 1:15 am, 3:15 am, and 5:15 am every day. C.At 3:pm on the 1st, 3rd, and 5th of each month. D. At 15 minutes after every hour every Monday, Wednesday, and Friday. Answer: D 42. You need to search the entire directory structure to locate a specific file. How could you do this and still be able to run other commands while the find command is still searching for you file?A. find / -name filename & B. find / -name filename C. bg find / -name filename D. &find / -name filename & Answer:A 43. To allow a user to mount a CD and read from it, which entry should be put into /etc/fstab? A. /dev/cdrom /mnt/cdrom iso9660 noauto,usermap,ro 0 0 B. /dev/cdrom /mnt/cdrom iso9660 noauto,uid=user,gid=group,ro 0 0 C. /dev/cdrom /mnt/cdrom iso9660 noauto,User,ro 0 0 D. /dev/cdrom /mnt/cdrom iso9660 noauto,user,ro 0 0 Answer: D 44.You have to mount the /data filesystem from an NFS server (srv 1) that does not support locking. Which of the following mount commands should you use? A. mount –a –t nfs B. mount –o locking=off srv1:/data /mnt/data C. mount –o nolock srv1:/data /mnt/data D. mount –o nolock/data@srv1 /mn/data Answer: C 45.You want to check what shares are offered by aWindows system. Which of the following commands could you use to perform this task? A. mmblookup B. showshares C. smbclient D. smbstatus E. listshares Answer: C 46. How can you determine who has scheduled at jobs? A. at –l B. at –q C. at –d D. atwho Answer:A 47. Using command substitution, how would you display the value of the present working directory? A. echo $(pwd) B. echo pwd C. $pwd D. pwd | echo Answer:A 48.Which of the following environment variables determines your working directory at the completion of a successful login?A. HOME B. BASH_ENVC. PWD D. BLENDERDIR Answer:A 49.Which of the following daemons must be running on an NFS server? A. portmap B. nfsiod C. nfsd D. xinetd E. mountd Answer:AC 50. Which process had the Process ID number 1? A. bash B. kernel C. init D. none Answer: C 51.You issue the command jobs and receive the following output: [1]- Stopped (tty output) pine [2]+ Stopped (tty output) MyScript How would you bring the MyScript process to the foreground? A. fg %2 B. ctrl-c C. fg MyScript D. ctrl-z Answer:A 52. On a system with separate partitions for /, /usr, /var, /tmp which filesystem[s] can safely be mounted read-only? A. /var, /usr B. /var C. /usr, /, /tmp D. /usr E. /tmp Answer: D 53. What file will show you the IRQs being used by different hardware devices? A. /proc/interrupts B. /proc/irqs C. /proc/irq D. /proc/int E. /proc/ints ... - tailieumienphi.vn