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单选题Which of the following conclusions is most appropriate to draw to describe why du shows fewer blocks used than df?（）AThe df command only counts the number of disk blocks and superblocks. BThe df command ignores space used for inodes, gnodes, and vnodes

题目
单选题
Which of the following conclusions is most appropriate to draw to describe why du shows fewer blocks used than df?（）
A

 The df command only counts the number of disk blocks and superblocks. 

B

 The df command ignores space used for inodes, gnodes, and vnodes.

C

 The du command does not take into account filesystem metadata. 

D

 The du command counts indirect blocks and superblocks in its calculations. 

相似考题

1.Which of the following commands will display, in MB, the total, used, and free blocks of the currently mounted filesystems?()A. df -mB. du -mC. df -vmD. du -vm

2.Which of the following commands will display what space is used in ／tmp filesystem?()A. df -Ik /tmpB. df -fk /tmpC. df -Uk /tmpD. df -Fk /tmp

3.The following configuration command was entered into a router:ip route 172.16.3.0 255.255.255.0 192.168.2.4 Which of the following statements are true regarding this configuration change?()A. The default administrative distance is used.B. The command is used to establish a static route.C. The command is used to configure the router interfaces.D. The command is used to establish a stub network.E. The subnet mask for the source address is 255.255.255.0

4.The man page for command shows the following syntax: The man page for command shows the following syntax: command [ －a | －b ] Which of the following statements is true regarding this entry?()A. Either the -a or flag -b may be used, but not both.B. If the flag -a is used then the flag -b also must be used.C. One of the -a or -b flags must be used, but not both at the same time.D. Both the flags may be used together, but neither are mandatory.

更多“单选题Which of the following conclusions is most appropriate to draw to describe why du shows fewer blocks used than df?（）A  The df command only counts the number of disk blocks and superblocks. B  The df command ignores space used for inodes, gnodes, and vn”相关问题

  • 第1题：

    The following configuration command was issued on router TK1:ip route 172.16.3.0 255.255.255.0 192.168.2.1.Which of the following statements are true regarding this command?()

    A. The command is used to establish a static route.

    B. The default administrative distance is used.

    C. The command is used to configure the default route.

    D. The subnet mask for the source address is 255.255.255.0

    E. The command is used to establish a stub network


    参考答案：A, B

  • 第2题：

    在UNIX中，查看文件的大小，使用的命令是（）

    • A、df -k
    • B、touch
    • C、du -k
    • D、blocks

    正确答案:C

  • 第3题：

    The df command indicates that a filesystem is full， however， the du command indicates that not all space is allocated.  How would the system administrator isolate the discrepancy（）

    • A、Use the fuser command to identify deleted but open files.
    • B、Use the ipcs command to view orphan shared memory segments.
    • C、Use the defrag command to determine if the filesystem is fragmented.
    • D、Use the topas command to identify processes using the most system resources.

    正确答案:A

  • 第4题：

    An AIX system administrator wants to be able to monitor disk usage and to be able to control how much disk space can be used.  Which command is run to obtain the desired output?（）

    • A、 /usr/bin/filemon 
    • B、 /usr/bin/startsrc 
    • C、 /usr/sbin/acct/startup 
    • D、 /usr/bin/df

    正确答案:A

  • 第5题：

    Which of the following tools should be used to display the location of unused physical partitions on a disk drive？（）

    • A、 df -k
    • B、 lsps
    • C、 lslv -p
    • D、 fileplace

    正确答案:C

  • 第6题：

    The man page for command shows the following syntax: The man page for command shows the following syntax: command [ -a | -b ] Which of the following statements is true regarding this entry?（）

    • A、Either the -a or flag -b may be used, but not both.
    • B、If the flag -a is used then the flag -b also must be used.
    • C、One of the -a or -b flags must be used, but not both at the same time.
    • D、Both the flags may be used together, but neither are mandatory.

    正确答案:D

  • 第7题：

    A user tries to telnet into a system that was previously accessible but gets the following error:  "telnetd: 0403-031 fork function failed, there is not enough memory available."  netstat -m shows that 0 mbuf errors have occurred.  Which of the following conclusions is most appropriate to draw about this error?（）

    • A、 The paging space is full.
    • B、 A particular filesystem is full and cannot be allocated to memory.
    • C、 A problem exists with telnetd. 
    • D、 The inetd daemon went down. 

    正确答案:A

  • 第8题：

    单选题
    The man page for command shows the following syntax: The man page for command shows the following syntax: command [ -a | -b ] Which of the following statements is true regarding this entry?（）
    A

    Either the -a or flag -b may be used, but not both.

    B

    If the flag -a is used then the flag -b also must be used.

    C

    One of the -a or -b flags must be used, but not both at the same time.

    D

    Both the flags may be used together, but neither are mandatory.


    正确答案： C
    解析： 暂无解析

  • 第9题：

    多选题
    The following configuration command was issued on router TK1:ip route 172.16.3.0 255.255.255.0 192.168.2.1.Which of the following statements are true regarding this command?（）
    A

    The command is used to establish a static route.

    B

    The default administrative distance is used.

    C

    The command is used to configure the default route.

    D

    The subnet mask for the source address is 255.255.255.0

    E

    The command is used to establish a stub network


    正确答案： D,A
    解析： 暂无解析

  • 第10题：

    单选题
    Which of the following keys are used to access advanced Windows start up options while a computer is booting？（）
    A

    F8

    B

    F6

    C

    F5

    D

    F2


    正确答案： D
    解析： 暂无解析

  • 第11题：

    单选题
    The df command indicates that a filesystem is full， however， the du command indicates that not all space is allocated.  How would the system administrator isolate the discrepancy（）
    A

    Use the fuser command to identify deleted but open files.

    B

    Use the ipcs command to view orphan shared memory segments.

    C

    Use the defrag command to determine if the filesystem is fragmented.

    D

    Use the topas command to identify processes using the most system resources.


    正确答案： C
    解析： 暂无解析

  • 第12题：

    单选题
    Which of the following tools should be used to display the location of unused physical partitions on a disk drive？（）
    A

     df -k

    B

     lsps

    C

     lslv -p

    D

     fileplace


    正确答案： B
    解析： 暂无解析

  • 第13题：

    Which of the following conclusions is most appropriate to draw to describe why du shows fewer blocks used than df?（）

    • A、 The df command only counts the number of disk blocks and superblocks. 
    • B、 The df command ignores space used for inodes, gnodes, and vnodes.
    • C、 The du command does not take into account filesystem metadata. 
    • D、 The du command counts indirect blocks and superblocks in its calculations. 

    正确答案:C

  • 第14题：

    The following configuration command was entered into a router:ip route 172.16.3.0 255.255.255.0 192.168.2.4 Which of the following statements are true regarding this configuration change?（）

    • A、The default administrative distance is used.
    • B、The command is used to establish a static route.
    • C、The command is used to configure the router interfaces.
    • D、The command is used to establish a stub network.
    • E、The subnet mask for the source address is 255.255.255.0

    正确答案:A,B

  • 第15题：

    A system administrator thinks that a filesystem may be full and that is what caused the machine to crash. Which command will show the administrator if they are correct?（）

    • A、 du 
    • B、 df 
    • C、 fsck 
    • D、 ncheck

    正确答案:B

  • 第16题：

    Which of the following commands will display, in MB, the total, used, and free blocks of the currently mounted filesystems?（）

    • A、df -m
    • B、du -m
    • C、df -vm
    • D、du -vm

    正确答案:C

  • 第17题：

    Which of the following commands will display what space is used in /tmp filesystem?（）

    • A、df -Ik /tmp
    • B、df -fk /tmp
    • C、df -Uk /tmp
    • D、df -Fk /tmp

    正确答案:A

  • 第18题：

    Examine the following command used to perform incremental level 0 backup：   RMAN> BACKUP INCREMENTAL LEVEL 0 DATABASE；   To enable the block change tracking， after the incremental level 0 backup you issued the following command：   SQL> ALTER DATABASE ENABLE BLOCK CHANGE TRACKING USING FILE ’/mydir/ rman_change_track.f’；To perform incremental level 1 cumulative backup， you issued the following command：   RMAN> BACKUP INCREMENTAL LEVEL 1 CUMULATIVE DATABASE；   Which two statements are true in the above situation？（）

    • A、 The block change tracking data will be used only from the next incremental 0 backup.
    • B、 The incremental backup will use change tracking data for accomplishing the backup.
    • C、 The incremental backup will not use change tracking data for accomplishing the backup.
    • D、 The block track file will scan all the blocks and create bitmap for all the blocks backed up in the level 0 backup.

    正确答案:A,C

  • 第19题：

    多选题
    Examine the following command used to perform incremental level 0 backup: RMAN> BACKUP INCREMENTAL LEVEL 0 DATABASE; To enable the block change tracking, after the incremental level 0 backup you issued the following command: SQL> ALTER DATABASE ENABLE BLOCK CHANGE TRACKING USING FILE '/mydir/ rman_change_track.f'; To perform incremental level 1 cumulative backup, you issued the following command: RMAN> BACKUP INCREMENTAL LEVEL 1 CUMULATIVE DATABASE; Which two statements are true in the above situation?（）
    A

    The block change tracking data will be used only from the next incremental 0 backup.

    B

    The incremental backup will use change tracking data for accomplishing the backup.

    C

    The incremental backup will not use change tracking data for accomplishing the backup.

    D

    The block track file will scan all the blocks and create bitmap for all the blocks backed up in the level 0 backup.


    正确答案： D,C
    解析： 暂无解析

  • 第20题：

    单选题
    You are managing an Oracle Database 11g instance with ASM storage. The ASM instance is down. To know the details of the disks in the DATA disk group ，you issued the following ASMCMD command：   ASMCMD> lsdsk -I -d DATA   Which statement is true regarding the outcome of this command？（）
    A

     The command succeeds but it retrieves only the disk names.

    B

     The command produces an error because the ASM instance is down.

    C

     The command succeeds but it shows only the status of the ASM instance.

    D

     The command succeeds and retrieves information by scanning the disk headers based on an  ASM_DISKSTRING  value.


    正确答案： B
    解析： 暂无解析

  • 第21题：

    单选题
    A system administrator thinks that a filesystem may be full and that is what caused the machine to crash. Which command will show the administrator if they are correct?（）
    A

     du 

    B

     df 

    C

     fsck 

    D

     ncheck


    正确答案： B
    解析： 暂无解析

  • 第22题：

    单选题
    A user tries to telnet into a system that was previously accessible but gets the following error:  "telnetd: 0403-031 fork function failed, there is not enough memory available."  netstat -m shows that 0 mbuf errors have occurred.  Which of the following conclusions is most appropriate to draw about this error?（）
    A

     The paging space is full.

    B

     A particular filesystem is full and cannot be allocated to memory.

    C

     A problem exists with telnetd. 

    D

     The inetd daemon went down. 


    正确答案： D
    解析： 暂无解析

  • 第23题：

    单选题
    An AIX system administrator wants to be able to monitor disk usage and to be able to control how much disk space can be used.  Which command is run to obtain the desired output?（）
    A

     /usr/bin/filemon 

    B

     /usr/bin/startsrc 

    C

     /usr/sbin/acct/startup 

    D

     /usr/bin/df


    正确答案： C
    解析： 暂无解析

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