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单选题
Assume a JavaBean com.example.GradedTestBean exists and has two attributes. The attribute name is oftype java.lang.String and the attribute score is of type java.lang.Integer. An array of com.example. GradedTestBean objects is exposed to the page in a request- scoped attribute called results. Additionally，an empty java.util.HashMap called resultMap is placed in the page scope. A JSP page needs to add the firstentry in results to resultMap， storing the name attribute of the bean as the key and the score attribute of thebean as the value. Which code snippet of JSTL code satisfies this requirement？（）
A
${resultMap[results[0].name] = results[0].score}
B
<c：set var=${resultMap} key=${results[0].name} value=${results[0].score} />
C
<c：set var=resultMap property=${results[0].name}> ${results[0].value}</c：set>
D
<c：set var=resultMap property=${results[0].name} value=${results[0].score} />
E
<c：set target=${resultMap} property=${results[0].name} value=${results[0].score} />
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考题
单选题A technician is troubleshooting a host connectivity problem. The host is unable to ping a server connected to Switch_A. Based on the results of the testing, what could be the problem（）。A
A remote physical layer problem exists.B
The host NIC is not functioning.C
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A local physical layer problem exists.
考题
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单选题Which statements are true， given the code new FileOutputStream（"data"， true） for creating an object of class FileOutputStream？（）A
FileOutputStream has no constructors matching the given arguments.B
An IOExeception will be thrown if a file named data already exists.C
An IOExeception will be thrown if a file named data does not already exist.D
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考题
单选题Assume a JavaBean com.example.GradedTestBean exists and has two attributes. The attribute name is oftype java.lang.String and the attribute score is of type java.lang.Integer. An array of com.example. GradedTestBean objects is exposed to the page in a request- scoped attribute called results. Additionally，an empty java.util.HashMap called resultMap is placed in the page scope. A JSP page needs to add the firstentry in results to resultMap， storing the name attribute of the bean as the key and the score attribute of thebean as the value. Which code snippet of JSTL code satisfies this requirement？（）A
${resultMap[results[0].name] = results[0].score}B
c：set var=${resultMap} key=${results[0].name} value=${results[0].score} /C
c：set var=resultMap property=${results[0].name} ${results[0].value}/c：setD
c：set var=resultMap property=${results[0].name} value=${results[0].score} /E
c：set target=${resultMap} property=${results[0].name} value=${results[0].score} /
考题
单选题A vessel hearing a fog signal forward of her beam has not determined if risk of collision exists. She shall reduce speed to（）.A
moderate speedB
safe speedC
half speedD
bare steerageway
考题
单选题Which determines if “prefs” is a directory and exists on the file system？（）A
Boolean exists=Directory.exists （“prefs”）；B
Boolean exists=（new File（“prefs”））.isDir（）；C
Boolean exists=（new Directory（“prefs”））.exists（）；D
Boolean exists=（new File（“prefs”））.isDirectory（）；E
Boolean exists=true； Try{ Directory d = new Directory（“prefs”）； } catch （FileNotFoundException e） { exists = false； }
考题
单选题You are approaching another vessel and are not sure whether danger of collision exists. You must assume（）.A
there is a risk of collisionB
you are the give-way vesselC
the other vessel is the give-way vesselD
there is no risk of collision
考题
问答题什么是JavaBean组件？使用JavaBean组件有什么优点？
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