Oracle 1Z0-409 問題集

質問 1：
The user smith is asked to replace all occurrences of the letter "e" with the letter "y" in file1.txt and save the output to fix.txt. Which command would let the user smith do so? (Choose all that apply.)
A. sed s/e/y file1.txt > fix.txt
B. sed s/e/y/g file1.txt > fix.txt
C. sed /y/e/g file1.txt > fix.txt
D. sed /y/e/g file1.txt > ./fix.txt
E. sed s/e/y/g < file1.txt > ./fix.txt
正解：B,E

質問 2：
Which statement is true about the command shown below?
[r1@server1 ~]$ head -15 /etc/passwd | tail -5
A. It will display the last five lines of the /etc/passwd file.
B. It will display the first 15 lines of the /etc/passwd file.
C. It will display the lines between 5 and 15 in the /etc/passwd file.
D. It will display the lines 11 through 15 in the /etc/passwd file.
正解：D

質問 3：
The root user tries to create the hard link link1 to /root/textfile in /boot and receives the error:
[root@server1 ~]# ln textfile /boot/link1
ln: creating hardlink `/boot/link' to `textfile': Invalid cross-device link
Which two statements are true? (Choose two.)
A. Hard links cannot span file systems.
B. Hard link is supposed to be another physical presence of a file on the same file system.
C. /boot can occupy files that are required at boot time only.
D. /boot file system does not exist or it is not mounted.
E. Hard links cannot be created to the nonexistent file /root/textfile.
正解：A,B

質問 4：
Which three statements are true about Local Shell variables? (Choose three.)
A. set by the shell
B. user modifiable
C. passed to programs started by the shell
D. accessible by child processes
E. value restricted to a single shell
正解：A,B,E

質問 5：
View the Exhibit.
What are the privileges granted to the user smith on the /tmp/backup directory?

A. He can only change to and from the /tmp/backup directory but cannot list its contents.
B. He can change to and copy contents from the /tmp/backup directory.
C. He can only navigate to the /tmp/backup directory.
D. He can only list the contents of /tmp/backup.
正解：D