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单选题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
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

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相似问题和答案

第1题：

He wouldn’t have been saved even if he ____ to hospital at once.

A.has been sent

B.was sent

C.had been sent

D.was being sent


参考答案：B

第2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3题：

Not only the switches but also the old wiring ______ changed.

A. have

B. are

C. have been

D. has been


正确答案：D
     13．遇到 not only … but also的句型时，谓语动词的单复数与靠近它的名词一致。Old wiring是单数，谓语动词为单数。选项 D 是正确的。句子大意：不光是开关，就连旧的线也换了

第4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5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6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.


参考答案：C

第7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8题：

The boy_____ to school right now.

A、has been taken

B、has been taking

C、is taken

D、is being taken


正确答案：D

第9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10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

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