Where should the GMDSS radio log be kept on board ship（）...

第1题

[单选题] What is the purpose of unicast reverse path forwarding?（）

A、to validate packet receipt on interfaces where the traffic should be received B、to forward packets out the interfaces where the traffic should be received C、to forward packets out the interfaces where the traffic should be sent D、to validate packet receipt on interfaces where the traffic should be sent

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第2题

[单选题] The EMP table contains these columns: You need to display the employees who have not been assigned to any department. You write the SELECT statement: What is true about this SQL statement?（）

A、The SQL statement displays the desired results. B、The column in the WHERE clause should be changed to display the desired results. C、The operator in the WHERE clause should be changed to display the desired results. D、The WHERE clause should be changed to use an outer join to display the desired results.

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第3题

[单选题] The EMP table contains these columns: LAST NAME VARCHAR2(25) SALARY NUMBER(6,2) DEPARTMENT_ID NUMBER(6) You need to display the employees who have not been assigned to any department. You write the SELECT statement: SELECT LAST_NAME, SALARY, DEPARTMENT_ID FROM EMP WHERE DEPARMENT_ID = NULL; What is true about this SQL statement?（）

A、The SQL statement displays the desired results. B、The column in the WHERE clause should be changed to display the desired results. C、The operator in the WHERE clause should be changed to display the desired results. D、The WHERE clause should be changed to use an outer join to display the desired results.

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第4题

[单选题] The EMP table contains these columns: LAST NAME VARCHAR2(25) SALARY NUMBER(6,2) DEPARTMENT_ID NUMBER(6) You need to display the employees who have not been assigned to any department. You write the SELECT statement: SELECT LAST_NAME, SALARY, DEPARTMENT_ID FROM EMP WHERE DEPARMENT_ID = NULL; What is true about this SQL statement? （）

A、The SQL statement displays the desired results. B、The column in the WHERE clause should be changed to display the desired results. C、The operator in the WHERE clause should be changed to display the desired results. D、The WHERE clause should be changed to use an outer join to display the desired results.

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第5题

[单选题] The EMP table contains these columns: LAST_NAME VARCHAR2 (25) SALARY NUMBER (6,2) DEPARTMENT_ID NUMBER (6) You need to display the employees who have not been assigned to any department. You write the SELECT statement: SELECT LAST_NAME, SALARY, DEPARTMENT_ID FROM EMP WHERE DEPARTMENT_ID = NULL; What is true about this SQL statement ?（）

A、The SQL statement displays the desired results. B、The column in the WHERE clause should be changed to display the desired results. C、The operator in the WHERE clause should be changed to display the desired results. D、The WHERE clause should be changed to use an outer join to display the desired results.

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第6题

[] The EMP table contains these columns: LAST_NAME VARCHAR2 (25) SALARY NUMBER (6,2) DEPARTMENT_ID NUMBER (6) You need to display the employees who have not been assigned to any department. You write the SELECT statement: SELECT LAST_NAME, SALARY, DEPARTMENT_ID FROM EMP WHERE DEPARTMENT_ID = NULL; What is true about this SQL statement ?（） The EMP table contains these columns: LAST_NAME VARCHAR2 (25) SALARY NUMBER (6,2) DEPARTMENT_ID NUMBER (6) You need to display the employees who have not been assigned to any department. You write the SELECT statement: SELECT LAST_NAME, SALARY, DEPARTMENT_ID FROM EMP WHERE DEPARTMENT_ID = NULL; What is true about this SQL statement ?（）

A、A.The SQL statement displays the desired results. B、B.The column in the WHERE clause should be changed to display the desired results. C、C.The operator in the WHERE clause should be changed to display the desired results. D、D.The WHERE clause should be changed to use an outer join to display the desired results.

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第7题

[单选题] If the situation arose where it became necessary to tow a disabled vessel，which statement is TRUE concerning the towing line?（）.

A、The towing line between the two vessels should be clear of the water B、The towing line should be taut at all times between the vessels C、There should be a catenary so the line dips into the water D、None of the above

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第8题

[单选题] The term SEAWORTHY TRIM means（）the ship must be in trim to meet the perils of the passage by sea to the next port not only in the sense that she should be left with an adequate amount of cargo to keep her on an even keel，but also that where necessary part of her cargo should be bagged to stop it shifting while out at sea．

A、it B、that C、where D、while

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第9题

[单选题] When launching an open lifeboat by falls，the boathooks should be（）.

A、secured forward and aft where readily available B、secured amidships where they will not hinder the personnel C、used for fending off D、used for picking up survivors in the water

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第10题

[单选题] 船长在哪里?（）

A、Where is the AB? B、Where is the bosun? C、Where is the captain? D、Where is the chief officer?

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Where should the GMDSS radio log be kept on board ship（）.

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