Which of the following statements is TRUE regarding automati

题目
单选题
Which of the following statements is TRUE regarding automatic identification systems (AIS) ?()
A

The master may,at his/her discretion,turn off the AIS if he/she believes that it may compromise the safety or security of the vessel

B

Under no circumstances shall AIS be turned off while underway as this could endanger the vessel and those around her

C

AIS is always required to be operating if the vessel is in or in the vicinity of a VTS area

D

AIS is always required to be operating if the vessel is within 100 nautical miles of the coastline

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第1题:

Which two statements are true regarding the starting of the database instance using the following command?()SQL>STARTUP UPGRADE

A. It enables all system triggers.

B. It allows only SYSDBA connections.

C. It ensures that all job queues remain active during the upgrade process.

D. It sets system initialization parameters to specific values that are required to enable database upgrade scripts to be run.


参考答案:B, D

第2题:

The following configuration command was entered into a router:ip route 172.16.3.0 255.255.255.0 192.168.2.4 Which of the following statements are true regarding this configuration change?()

A. The default administrative distance is used.

B. The command is used to establish a static route.

C. The command is used to configure the router interfaces.

D. The command is used to establish a stub network.

E. The subnet mask for the source address is 255.255.255.0


参考答案:A, B

第3题:

Which of the statements regarding benefit-cost analysis in the Special window are true?

A . 1 and 2

B . 2 and 3

C . 1 and 3

D . 1, 2 and 3

E . None of the above.


正确答案:C

第4题:

Which two statements are true regarding the starting of the database instance using the following command?() SQL>STARTUP UPGRADE

  • A、It enables all system triggers.
  • B、It allows only SYSDBA connections.
  • C、It ensures that all job queues remain active during the upgrade process.
  • D、It sets system initialization parameters to specific values that are required to enable database upgrade scripts to be run.

正确答案:B,D

第5题:

Which of the following is true regarding Label Distribution Protocol (LDP)?()

  • A、It is a label distribution protocol for MPLS
  • B、It is a set of procedures and messages by which LSRs establish Label Switch Paths (LSPs) through a network
  • C、Tag distribution Protocol (TDP) was the basis for LDP
  • D、All of the above are true

正确答案:D

第6题:

The man page for command shows the following syntax: The man page for command shows the following syntax: command [ -a | -b ] Which of the following statements is true regarding this entry?()

A. Either the -a or flag -b may be used, but not both.

B. If the flag -a is used then the flag -b also must be used.

C. One of the -a or -b flags must be used, but not both at the same time.

D. Both the flags may be used together, but neither are mandatory.


参考答案:D

第7题:

Which of the following statements is TRUE regarding crane operations ________.

A.Radio communications allow the crane operator to disregard the use of hand signals

B.The crane operators and signalman must be familiar with the correct hand signals

C.The forward cranes can be operated from the bridge

D.The aft cranes can be operated from the aft steering station


正确答案:B

第8题:

Which of the following statements is true? Accounts payable are ______.

A.debts owed to suppliers

B.related to purchases of goods on an open account

C.current liabilities

D.all of the above


正确答案:D
解析:文章第三段提到Accounts payable are debts...on an open account.本题是关于应付账款的表述,应付账款是企业欠供应商的债务,是由于购买商品时进行赊销而形成的应付账款,应付账款属于短期流动债务。

第9题:

Which of the following statements is true regarding the VERSIONS BETWEEN clause?()  

  • A、 The VERSIONS BETWEEN clause may be used in DML statements.
  • B、 The VERSIONS BETWEEN clause may be used in DDL statements.
  • C、 The VERSIONS BETWEEN clause may not be used to query past DDL changes to tables.
  • D、 The VERSIONS BETWEEN clause may not be used to query past DML statements to tables.

正确答案:C

第10题:

Which statement is true regarding the INTERSECT operator?()

  • A、It ignores NULL values 
  • B、Reversing the order of the intersected tables alters the result 
  • C、The names of columns in all SELECT statements must be identical 
  • D、The number of columns and data types must be identical for all SELECT statements in the query 

正确答案:D

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