多选题Which three statements about subqueries are true? （）AAsinglerowsubquerycanretrieveonlyonecolumnandonerow.BAsinglerowsubquerycanretrieveonlyonerowbutmanycolumns.CAmultiplerowsubquerycanretrievemultiplerowsandmultiplecolumns.DAmultiplerowsubquerycanbecom

第1题：

Which three statements are true about terms in a policy?（）

• A、The order of the terms in a policy is irrelevant
• B、The action is specified in a then statement
• C、Ters are optional in a policy
• D、The match condition can be identified with a from statement
• E、Every policy must contain at least one term

第2题：

Which three statements are true about Source Specific Multicast？（）

• A、Is best suited for applications that are in the one-to-many category.
• B、SSM uses shortest path trees only.
• C、The use of SSM is recommended when there are many sources and it is desirable to keep the amount of mroute state in the routers in the network to a.
• D、There are no RPs to worry about.

第3题：

Which of these statements is true about ssids configured in cisco adu？（）

• A、ssids are not case-sensitive.
• B、ssids must be listed in the same order in the adu as they are in the access point.
• C、a maximum of three ssids may be configured.
• D、ssids may have a maximum of 16 characters.

第4题：

Which three statements about subqueries are true?（）

• A、A single row subquery can retrieve only one column and one row.
• B、A single row subquery can retrieve only one row but many columns.
• C、A multiple row subquery can retrieve multiple rows and multiple columns.
• D、A multiple row subquery can be compared by using the ">" operator.
• E、A single row subquery can use the IN operator.
• F、A multiple row subquery can use the "=" operator.

第5题：

Which two statements about subqueries are true? （）

• A、A subquery should retrieve only one row.
• B、A subquery can retrieve zero or more rows.
• C、A subquery can be used only in SQL query statements.
• D、Subqueries CANNOT be nested by more than two levels.
• E、A subquery CANNOT be used in an SQL query statement that uses group functions.
• F、When a subquery is used with an inequality comparison operator in the outer SQL statement, the column list in the SELECT clause of the subquery should contain only one column.

第6题：

Which three statements are true regarding subqueries?（）

• A、Subqueries can contain GROUP BY and ORDER BY clauses 
• B、Main query and subquery can get data from different tables 
• C、Main query and subquery must get data from the same tables 
• D、Subqueries can contain ORDER BY but not the GROUP BY clause 
• E、Only one column or expression can be compared between the main query and subquery
• F、 Multiple columns or expressions can be compared between the main query and subquery

第7题：

Which three statements are true about terms in a policy?（）

• A、The order of the terms in a policy is irrelevant.
• B、The action is specified in a then statement.
• C、Terms are optional in a policy.
• D、The match condition can be identified with a from statement.
• E、A from statement is mandatory in a term.

第8题：

Which three statements about Label-Switched Paths （LSPs） are true？ （）

• A、 LSPs are bidirectional.
• B、 LSPs are unidirectional.
• C、 LSPs can be signaled by CAC.
• D、 LSPs can be configured explicitly.
• E、 LSPs can be configured dynamically.

第9题：

Which three statements about subqueries are true? （）

• A、A main query can have more than one subquery.
• B、A subquery can have more than one main query.
• C、The subquery and main query must retrieve data from the same table.
• D、The subquery and main query can retrieve data from different tables.
• E、Only one column or expression can be compared between the subquery and main query.
• F、Multiple columns or expression can be compared between the subquery and main query.

第10题：

Which two statements are true regarding subqueries? （）

• A、A subquery can retrieve zero or more rows 
• B、Only two subqueries can be placed atone level 
• C、A subquery can be used only in SQL query statements 
• D、A subquery can appear on either side of a comparison operator 
• E、There is no limit on the number of subquery levels in the WHERE clause of a SELECT statement