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【单选题】

When Bob, a technician, powers up a desktop PC, the unit will repeat three short beeps and will not POST. Which of the following is MOST likely the problem?（）

A、The memory is failing.

B、The CPU is overheating.

C、The hard drive is not attached properly.

D、The operating system is not installed.

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更多“When Bob, a technician, powers up a desktop PC, the unit will repeat three short beeps and will not POST. Which of the following is MOST likely the problem?（）”相关的问题
第1题
[单选题] 若Bob给Alice发送一封邮件，并想让Alice确信邮件是由Bob发出的，则 Bob应该选用（）对邮件加密。

A、Alice的公钥  B、Alice的私钥  C、Bob公钥  D、Bob的私钥  

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第2题
[单选题] Given that c is a reference to a valid java.io.Console object， and： 11.String pw = c.readPassword（"%s"， "pw： "）； 12.System.out.println（"got " + pw）； 13.String name = c.readLine（"%s"， "name： "）； 14.System.out.println（" got "， name）； If the user types fido when prompted for a password， and then responds bob when prompted for a name，what is the result？（）

A、An exception is thrown at runtime  B、pw： fido got fido name： bob got bob  C、pw： got fido name： bob got bob  D、Compilation fails.  

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第3题
[] 如下图所示，Alice用Bob的密钥加密明文，将密文发送给Bob。Bob再用自己的私钥解密，恢复出明文。以下说法正确的是（） 如下图所示，Alice用Bob的密钥加密明文，将密文发送给Bob。Bob再用自己的私钥解密，恢复出明文。以下说法正确的是（）

A、A.此密码体制为对称密码体制  B、B.此密码体制为私钥密码体制  C、C.此密码体制为单钥密码体制  D、D.此密码体制为公钥密码体制  

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第4题
[单选题] A UNIX user named Bob wants to replace his chess program with a new one, but he is not sure where theold one is installed. Bob is currently able to run a Java chess program starting from his home directory /home/bob using the command: java-classpath /test:/home/bob/downloads/*.jar games.Chess Bob'sCLASSPATH is set (at login time) to/usr/lib:/home/bob/classes:/opt/java/lib:/opt/java/lib/*.jar What is a possible location for the Chess.class file?（）

A、/test/Chess.class  B、/home/bob/Chess.class  C、/test/games/Chess.class  D、/usr/lib/games/Chess.class  E、/home/bob/games/Chess.class  F、inside jarfile /opt/java/lib/Games.jar (with a correct manifest)  H、inside jarfile /home/bob/downloads/Games.jar (with a correct manifest)  

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第5题
[填空题] "在请求消息INVITEsip：bob@acme.comSIP/2.0。。。。。。。中，sip：bob@acme.com被称之为（）"

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第6题
[] A UNIX user named Bob wants to replace his chess program with a new one，but he is hot sure where the old one is in stalled.Bob is currently able to run a Java chess program starting from his home directory/home/bobusingthecommand： java-classpath/test：/home/bob/downloads/*.jargames.ChessBob’sCLASSPATHisset（atlogintime）to： /usr/lib：/home/bob/classes：/opt/java/lib：/opt/java/lib/*.jar What is a possible location for the Chess.class file？（） A UNIX user named Bob wants to replace his chess program with a new one，but he is hot sure where the old one is in stalled.Bob is currently able to run a Java chess program starting from his home directory/home/bobusingthecommand： java-classpath/test：/home/bob/downloads/*.jargames.ChessBob’sCLASSPATHisset（atlogintime）to： /usr/lib：/home/bob/classes：/opt/java/lib：/opt/java/lib/*.jar What is a possible location for the Chess.class file？（）

A、A./test/Chess.class  B、B./home/bob/Chess.class  C、C./test/games/Chess.class  D、D./usr/lib/games/Chess.class  E、E./home/bob/games/Chess.class  F、F.inside jarfile/opt/java/lib/Games.jar（withacorrectmanifest）  H、G.inside jarfile/home/bob/downloads/Games.jar（withacorrectmanifest）  

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第7题
[] Which of the following statements allows BOB to revoke access to the SAMPLE database from user TOM?（）

A、A.REVOKE ACCESS ON DATABASE FROM USER bob  B、B.REVOKE CONNECT ON DATABASE FROM USER tom  C、C.REVOKE tom FROM ACCESS ON DATABASE BY USER bob  D、D.REVOKE tom FROM CONNECT ON DATABASE BY USER bob  

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第8题
[单选题] PHP表达式$foo=1+”bob3”，则$foo的值是（）

A、1  B、1bob3  C、1b  D、92  

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第9题
[单选题] A customer, Bob, needs to be able to access the Internet while traveling. Which of the following could Jill, a technician, recommend to Bob?（）

A、Cellular service with an adapter for Bob’s laptop.  B、USB adapter with 802.11n capabilities for maximum speeds.  C、A Bluetooth card to attach to multiple networks.  D、Enable Wi-Fi so Bob can connect to any open network.  

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第10题
[单选题] A UNIX user named Bob wants to replace his chess program with a new one， but he is not sure where theold one is installed.  Bob is currently able to run a Java chess program starting from his home directory /home/bob using thecommand： java -classpath /test：/home/bob/downloads/*.jar games. Chess Bob’s CLASSPATH is set （at login time） to： /usr/lib：/home/bob/classes：/opt/java/lib：/opt/java/lib/*.jar What is a possible location for the Chess.class file？（）

A、/test/Chess.class  B、/home/bob/Chess.class  C、/test/games/Chess.class  D、/usr/lib/games/Chess.class  E、/home/bob/games/Chess.class  

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