Which of the following is a sign that a computer has been infected by a worm?（）A、Screensaver changed on its ownB、Unauthorized outgoing emails being sentC、Desktop background changed on its ownD、Left and right mouse buttons have been flipped

题目

Which of the following is a sign that a computer has been infected by a worm?（）

  • A、Screensaver changed on its own
  • B、Unauthorized outgoing emails being sent
  • C、Desktop background changed on its own
  • D、Left and right mouse buttons have been flipped
相似考题

1.Not only the switches but also the old wiring ______ changed.A. haveB. areC. have beenD. has been

2.He wouldn’t have been saved even if he ____ to hospital at once.A.has been sentB.was sentC.had been sentD.was being sent

3.A user is trying to use Remote Desktop to connect to another computer on the LAN. Theconnection fails. The technician opens up a command prompt and types the following: telnetcomputernamE. 3389” and also gets the same error message.Which of the following is the MOSTlikely cause of this error, assuming that the OS firewall has been disabled?（）A. The antivirus software is blocking the incoming connection.B. The ISP is blocking Remote Desktop at their end.C. The RDP connection has been configured to use a non-standard port.D. The telnet service has not been installed.

4.The boy_____ to school right now.A、has been takenB、has been takingC、is takenD、is being taken

更多“Which of the following is a sign that a computer has been infected by a worm?（）A、Screensaver changed on its ownB、Unauthorized outgoing emails being sentC、Desktop background changed on its ownD、Left and right mouse buttons have been flipped”相关问题

  • 第1题：

    Not only the students but also the old teacher ______ been changed. A. was B. were C. has D. have


    正确答案：C

  • 第2题：

    Your customer has deployed a Cisco Wireless Location Appliance within its warehouseenvironment. However， employees there have been experiencing problems when tracking objects using activeRFID tags.The RFID tag data is not being collected. On which device would you verify that RFIDs have been enabled？（）

    • A、access point
    • B、location manager
    • C、wireless controller
    • D、Cisco WCS

    正确答案:C

  • 第3题：

    Companycom has been performing scheduled backups of their data to tape using "tar" in a script for over one year with no problems. Recently, the tar command is returning a non zero return code during the backup phase, causing the script to fail. What is the primary cause of this problem?（）

    • A、The files have grown to over eight gigabytes in size
    • B、The file systems are corrupt, and fsck should be run
    • C、The tape block size has been changed from the default
    • D、The user’s limit has been changed to less than eight gigabytes

    正确答案:A

  • 第4题：

    Your customer has deployed a Cisco Wireless Location Appliance within its warehouse environment. However，employees there have been experiencing problems when tracking objects using active RFIDtags. The RFID tag data is not being collected. On which device would you verify that RFIDs have beenenabled？（）

    • A、Cisco WCS
    • B、access point
    • C、location manager
    • D、wireless controller

    正确答案:D

  • 第5题：

    A computer has been upgraded with a new hard drive and after reassembling the computer and turning the computer on， the drive LED remains lit and an error message during power-on self test （POST） states， ’No Drive Present.’ Which of the following would MOST likely be the cause？（）

    • A、The motherboard was damaged and needs replacing.
    • B、The floppy drive was not reconnected.
    • C、A configuration disk was left in the floppy drive.
    • D、The ribbon cable has been installed incorrectly.

    正确答案:D

  • 第6题：

    Which is the correct description of a pinned buffer in the database buffer cache（）

    • A、The buffer is currently being accessed.
    • B、The buffer is empty and has not been used.
    • C、The contents of the buffer have changed and must be flushed to the disk by the DBWn process. 
    • D、The buffer is a candidate for immediate aging out and its contents are synchronized with the block contents on the disk.

    正确答案:A

  • 第7题：

    单选题
    A computer has been upgraded with a new hard drive and after reassembling the computer and turning the computer on， the drive LED remains lit and an error message during power-on self test （POST） states， ’No Drive Present.’ Which of the following would MOST likely be the cause？（）
    A

    The motherboard was damaged and needs replacing.

    B

    The floppy drive was not reconnected.

    C

    A configuration disk was left in the floppy drive.

    D

    The ribbon cable has been installed incorrectly.


    正确答案： D
    解析： 暂无解析

  • 第8题：

    单选题
    Which of the following is a sign that a computer has been infected by a worm?（）
    A

    Screensaver changed on its own

    B

    Unauthorized outgoing emails being sent

    C

    Desktop background changed on its own

    D

    Left and right mouse buttons have been flipped


    正确答案： A
    解析： 暂无解析

  • 第9题：

    单选题
    Companycom has been performing scheduled backups of their data to tape using "tar" in a script for over one year with no problems. Recently, the tar command is returning a non zero return code during the backup phase, causing the script to fail. What is the primary cause of this problem?（）
    A

    The files have grown to over eight gigabytes in size

    B

    The file systems are corrupt, and fsck should be run

    C

    The tape block size has been changed from the default

    D

    The user’s limit has been changed to less than eight gigabytes


    正确答案： B
    解析： 暂无解析

  • 第10题：

    单选题
    Wrought iron has an inherent resistance to corrosion but is not to be had freely , its place has been taken by the cuprous alloysAccording to the above sentence , which of the following statements is true?（）
    A

    Wrought iron can resist liquids flow

    B

    It is difficult to attain the wrought iron

    C

    Wrought iron should be combined with cuprous alloys

    D

    The cuprous alloys have mere disadvantages than wrought iron


    正确答案： C
    解析： 暂无解析

  • 第11题：

    单选题
    Which is the correct description of a pinned buffer in the database buffer cache（）
    A

    The buffer is currently being accessed.

    B

    The buffer is empty and has not been used.

    C

    The contents of the buffer have changed and must be flushed to the disk by the DBWn process. 

    D

    The buffer is a candidate for immediate aging out and its contents are synchronized with the block contents on the disk.


    正确答案： C
    解析： Every buffer has an access mode:pinnedorfree(unpinned). A buffer is "pinned" in the cache so that it does not age out of memory while a user session accesses it. Multiple sessions cannot modify a pinned buffer at the same time.

  • 第12题：

    单选题
    A user is trying to use Remote Desktop to connect to another computer on the LAN. Theconnection fails. The technician opens up a command prompt and types the following: “telnetcomputernamE. 3389” and also gets the same error message. Which of the following is the MOSTlikely cause of this error, assuming that the OS firewall has been disabled?（）
    A

    The antivirus software is blocking the incoming connection.

    B

    The ISP is blocking Remote Desktop at their end.

    C

    The RDP connection has been configured to use a non-standard port.

    D

    The telnet service has not been installed.


    正确答案： C
    解析： 暂无解析

  • 第13题：

    Which statement about general average is TRUE ________．

    A.Damage to a ship must have been incurred while the ship and/or its machinery was being used for its intended purpose

    B.Property must have been sacrificed or an expenditure of money incurred

    C.The loss or damage to deck cargo due to heavy weather constitutes general average

    D.Of the ship，the freight，and the cargo interests，only one need be involved


    正确答案：B

  • 第14题：

    Your customer has deployed a Cisco Wireless Location Appliance within its warehouseenvironment. However， employees there have been experiencing problems when tracking objects using activeRFID tags.The RFID beacon rate is 10 seconds and you have discovered an issue with the RFID timeoutvalue. Where and how should the RFID value be changed？（）

    • A、on the Cisco WCS， to 95 seconds
    • B、on the wireless controller， to 45 seconds
    • C、on the wireless controller， to 95 seconds
    • D、on the Cisco WCS， to 45 seconds

    正确答案:C

  • 第15题：

    A customer reports the optical drive is no longer responding. Which of the following questionsshould be asked FIRST?（）

    • A、“Did you log in with an administrator account?”
    • B、“Have you been to any inappropriate websites?”
    • C、“What have you changed since the optical drive worked properly?”
    • D、“What has changed since the optical drive worked properly?”

    正确答案:D

  • 第16题：

    Yours truly，customer has deployed a cisco wireless location appliance within its warehouse  environment. however， employees there have been experiencing problems when tracking objects using active rfid tags. the rfid tag data is not being collected. On which device would you verify  that rfids have been enabled？（）

    • A、access point
    • B、location manager
    • C、wireless controller
    • D、cisco wcs

    正确答案:C

  • 第17题：

    A machine has just been installed with AIX, and no system parameters have been changed. In order to enable routing function, which of the following "no" options should be changed?（）

    • A、 set bcastping to 1 
    • B、 set ipforwarding to 1 
    • C、 set rfc1323 to 1 
    • D、 set directed_broadcast to 1

    正确答案:B

  • 第18题：

    Initially， for the Automatic Workload Repository （AWR） statistics， the retention period is set to 7 days， the collection interval is set to 30 minutes and the collection level is set to Typical in your production database.  You have been using the Memory Advisor for the last three months to generate recommendations for tuning memory components. However， when you observe the Memory Advisor on a Friday， you find that the statistics are available only for two days， Thursday and Friday， of that week.  What would have caused the statistics to be removed？（）

    • A、On Wednesday， the statistics have been purged.
    • B、On Wednesday， the retention period has been set to zero.
    • C、On Wednesday， the collection interval has been set to zero.
    • D、On Wednesday， the collection level has been changed to All.
    • E、On Wednesday， the retention period has been set to one day.
    • F、On Wednesday， the retention period has been set to two days.
    • G、On Wednesday， the collection level has been changed to Typical.
    • H、On Wednesday， the collection interval has been set to 1440 minutes.

    正确答案:F

  • 第19题：

    单选题
    Things have been changed by the following EXCEPT______.
    A

    the use of radar systems and automated instruments

    B

    the use of communication satellites and modern computers

    C

    the joint work of meteorologists and computer scientists

    D

    weather information volume is large enough to compile and analyze


    正确答案： A
    解析：

  • 第20题：

    单选题
    A machine has just been installed with AIX, and no system parameters have been changed. In order to enable routing function, which of the following "no" options should be changed?（）
    A

     set bcastping to 1 

    B

     set ipforwarding to 1 

    C

     set rfc1323 to 1 

    D

     set directed_broadcast to 1


    正确答案： B
    解析： 暂无解析

  • 第21题：

    单选题
    A customer reports the optical drive is no longer responding. Which of the following questionsshould be asked FIRST?（）
    A

    “Did you log in with an administrator account?”

    B

    “Have you been to any inappropriate websites?”

    C

    “What have you changed since the optical drive worked properly?”

    D

    “What has changed since the optical drive worked properly?”


    正确答案： D
    解析： 暂无解析

  • 第22题：

    单选题
    Which of the following is the best version of sentences 10 and 11 (reproduced below) ?It is easy to see why this disease has been dismissed and ignored. Its because of it’s vagueness and mystery.
    A

    This disease has been dismissed and ignored because of its vagueness and mystery.

    B

    It is easy to see why this disease has been dismissed and ignored. It’s because of the vagueness and the mystery.

    C

    Vagueness and mystery dismiss and ignore this disease.

    D

    Why this disease has been dismissed and ignored is because of its vagueness and mystery.

    E

    It is easy for you to see why this disease has been dismissed and ignored. It is because of the vagueness and mystery.


    正确答案： C
    解析：
    A项用最简洁的方式将两个句子结合起来。B，D，E项不流畅。C项改变了句子的意思。

  • 第23题：

    单选题
    Initially， for the Automatic Workload Repository （AWR） statistics，the retention period is set to 7 days， the collection interval is set to 30 minutes and the collection level is set to Typical in your production database. You have been using the Memory Advisor for the last three months to generate recommendations for tuning memory components. However，when you observe the Memory Advisor on a Friday，you find that the statistics are available only for two days， Thursday and Friday，of that week. What would have caused the statistics to be removed？（）
    A

    On Wednesday， the statistics have been purged.

    B

    On Wednesday， the retention period has been set to zero.

    C

    On Wednesday， the collection interval has been set to zero.

    D

    On Wednesday， the collection level has been changed to All.

    E

    On Wednesday， the retention period has been set to one day.

    F

    On Wednesday， the retention period has been set to two days

    G

    On Wednesday, the collection level has been changed to Typical.

    H

    On Wednesday, the collection interval has been set to 1440 minutes.


    正确答案： B
    解析： 暂无解析

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