In this scenario， assume that you archive logs 101 to 104 to two archiving destinations， /log1 and /log2. The control file contains archived log records as follows： Sequence Filename 101 /log1/log_1_101.arc 101 /log2/log_1_101.arc 102 /log1/log_1_102.arc 102 /log2/log_1_102.arc 103 /log1/log_1_103.arc 103 /log2/log_1_103.arc 104 /log1/log_1_104.arc 104 /log2/log_1_104.arc You accidentally delete logs 102 and 104 from log 1. You run this command： BACKUP ARCHIVELOG FROM SEQUENCE 101 UNTIL SEQUENCE 105； What happens？（）
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Given： What is the result？（）
A. The value "4" is printed at the command line.
B. Compilation fails because of an error in line 5.
Compilation fails because of an error in line 9.
D. A NullPointerException occurs at runtime.
E. A NumberFormatException occurs at runtime.
F. An IllegalStateException occurs at runtime.
对企事业而言，呼叫中心作用体现在（）。
A. 提高服务质量，让顾客满意；
B. 降低成本，通过呼叫中心可增加企业直销，降低中间周转；
C. 宣传并改善企业形象，扩大企业影响；
D. 可以从客户服务中心收集到大量信息和数据的分析，为企业在发展和决策提供依据；
Which two， independently， will allow Sub to compile？（）
A. Change line 2 to：public int a；
B. Change line 2 to：protected int a；
Change line 13 to：public Sub（）{this（5）；}
D. Change line 13 to：public Sub（）{super（5）；}
E. Change line 13 to：public Sub（）{super（a）；}
Which two characteristics apply to a CAS T1 interface?（）
A. signaling travels in-band
B. up to 24 voice channels
C. up to 32 voice channels
D. signaling travels in time slot 17
E. uses
F. 931 signaling protocol in a common channel
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