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多选题
vara=1；functiontest（）{a++；alert（a）；vara=1；alert（a）；}test（）；分析上面JavaScript代码段，输出结果错误的是（）。
A
NaN1
B
1NaN
C
11
D
NaNNaN
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Javascript中,以下那两个变量的值不是==:()
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以下两个变量a和b,a＋b的哪个结果是NaN?()
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YouareworkingontheCertkillerdatabase.Whatisthedefaultnameofthealertlogfileinthisdatabase?()
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vara=1；functiontest（）{a++；alert（a）；vara=1；alert（a）；}test（）；分析上面JavaScript代码段，输出结果错误的是（）。A、NaN1B、1NaNC、11D、NaNNaN
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分析下面的JavaScript代码段：vara=newArray（"100"，"2111"，"41111"）；for（vari=0；iA、100 2111 41111B、1 2 3C、0 1 2D、1 2 4
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执行下面的代码打印出来的结果，正确的是：vararr=[1，"name"，true，[-1，0，1]]；arr[5]=function（）{alert（"element"）}alert（arr.length）：（）A、6B、7C、8D、9
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执行下面的代码打印出的结果，正确的是：alert（true+1）；alert（"3"+0）；alert（5+"12"）；alert（undefined+11）：（）A、2，30，512，NaNB、NaN，30，17，undefinedC、1，3，17，NaND、NaN，30，512，11
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看以下JavaScript程序：varx=prompt（“请输入1-5的数字！”）；switch（x）{case“1”：alert（“one”）；case“2”：alert（“two”）；case“3”：alert（“three”）；case“4”：alert（“four”）；case“5”：alert（“five”）；default：alert（“none”）；}运行以上程序，在提示对话框中输入“4”，依次弹出的对话框将输出（）。A、four，five，noneB、four，noneC、fiveD、five，none
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You are working on the Certkiller database. What is the default name of the alert log file in this database？（）A、alert_ Certkiller .logB、alertlog_ Certkiller .logC、alert_log_ Certkiller .logD、Certkiller _alert_log.logE、log_alert_： Certkiller .logF、trace_alert_ Certkiller .log
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You are maintaining your OLTP database in Oracle10g. You have not set the warning level and critical level threshold values for space usage of the DATA1 tablespace. What will be the impact？（）A、 No warning level or critical level alert will be generated.B、 A warning level alert will never be generated， but a critical level alert will be generated when 97 percent space of the DATA1 tablespace is used.C、 A critical level alert will never be generated， but a warning level alert will be generated when 85 percent space of the DATA1 tablespace is used.D、 A warning level alert will be generated at 85 percent space usage of the DATA1 tablespace， and a critical level alert is generated at 97 percent space usage of the DATA1 tablespace.
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单选题执行下面的代码打印出的结果，正确的是：alert（true+1）；alert（"3"+0）；alert（5+"12"）；alert（undefined+11）：（）A
2，30，512，NaNB
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单选题分析下面的JavaScript代码段：vara=newArray（"100"，"2111"，"41111"）；for（vari=0；i
A
100 2111 41111B
1 2 3C
0 1 2D
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单选题The warning level threshold value for a tablespace， DATA1， is set to 60% and the critical level threshold value is set to 80%. The tablespace， DATA1， is infrequently used and is not a part of the production environment. You issued the following command： SQL EXECUTE DBMS_SERVER_ALERT.SET_THRESHOLD （dbms_server_alert.tablespace_pct_full， dbms_server_alert.operator_ge，80， dbms_server_alert.operator_ge，90， 1，1，NULL， dbms_server_alert.object_type_tablespace，’DATA’）； What will be the result of the command？（）A
The command will be executed successfully only if the tablespace DATA1 is a dictionary-managed tablespace.B
The total numbers of alerts that you receive every day will be reduced.C
The total number of alerts that you receive every day will be increased.D
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多选题vara=10；functionexample（）{alert（a）；vara=5；}example（）；执行，以下结果错误的是（）。AundefinedB报错C10D5
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