Comets are still regarded with awe by some people.（）

A . The use of discontiguous subnets is not allowed B . The use of variable length subnet masks is permitted C . RIP v1 is a classless routing protocol D . IGRP supports classless routing within the same autonomous system E . RIP v2 supports classless routing

A . Only a single partitioning key column can be specified. B . All DML statements must use partition-extended syntax. C . The same physical attributes must be specified for each partition. D . Unique local indexes cannot be created on a system-partitioned table. E . Traditional partition pruning and partitionwise joins are not supported on these tables.

A . A subquery that defines a view cannot include the GROUP BY clause  B . A view that is created with the subquery having the DISTINCT keyword can be updated  C . A view that is created with the subquery having the pseudo column ROWNUM keyword cannot be updated  D . A data manipulation language (DML) operation can be performed on a view that is created with the subquery having all the NOT NULL columns of a table

A .  When a table is dropped， the corresponding indexes are automatically dropped. B .  For each DML operation performed， the corresponding indexes are automatically updated. C .  Indexes should be created on columns that are frequently referenced as part of an expression. D .  A non-deferrable PRIMARY KEY or UNIQUE KEY constraint in a table automatically creates a uniqueindex.

A . Each B channel can transmit up to 64 kbps B . The ISDN B channel carries voice or data C . The ISDN D channel transmits control information. D . The D channel transmission rate varies depending on the service used. E . HDLC or PPP can be used to encapsulate D channel information.

A .  An interface can belong to multiple Flex Links. B .  Flex Links operate only over single pairs of links. C .  Flex Link pairs must be of the same interface type D .  Flex Links automatically disable STP so no BPDUs are propagated E .  Failover from active to standby on Flex Links takes less than a second

A .  It requires relinking of the Oracle binary. B .  It does not require database instance shutdown. C .  It can detect conflicts between two online patches. D .  It is available for installing all patches on all platforms.  E .  It works only in a single database instance environment.

A . They acknowledge receipt of TCP segments. B . They guarantee datagram delivery. C . They can provide hosts with information about network problems. D . They are encapsulated within IP datagrams. E . They are encapsulated within UDP datagrams.

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

A . Listeners use only the TCP/IP protocol. B . Multiple listener processes can run simultaneously on a host. C . Multiple database instances can be registered with a single listener. D . The listener-related errors can be traced only at the administrative level. E . Only one database instance can be registered with a single listener at any time

A . Listeners use only the TCP/IP protocol. B . Multiple listener processes can run simultaneously on a host. C . Multiple database instances can be registered with a single listener. D . The listener-related errors can be traced only at the administrative level. E . Only one database instance can be registered with a single listener at any time.

A . The database can have more than one undo tablespace. B . The UNDO_TABLESPACE parameter is valid in both automatic andmanualundo management. C . Undo segments automatically grow and shrink as needed， acting as circular storage buffer for their assigned transactions. D . An undotablespaceis automatically created if the UNDO_TABLESPACEparameter is not set and the UNDO_MANAGEMENT parameter is set to AUTO during the database instance start up.

A . Yes, they do. B . Yes, they are. C . No, there aren‘t. D . No, they don‘t.

A . Passive routes are in the process of being calculated by DUAL. B . EIGRP supports VLSM，route summarization，and routing update authentication. C . EIGRP exchanges full routing table information with neighboring routers with every update. D . If the feasible successor has a higher advertised distance than the successor route，it becomes theprimary route. E . A query process is used to discover a replacement for a failed route if a feasible successor is not identified from the current routing information.

A . External tables can be updated.  B . External tables are read-only tables.  C . Indexes can be created on external tables.  D . Indexes cannot be created on external tables.

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&e

A . It requires relinking of the Oracle binary. B . It does not require database instance shutdown. C . It can detect conflicts between two online patches. D . It is available for installing all patches on all platforms. E . It works only in a single database instance environment.

A .  indexes are maintained by cache entry ownes B .  an application should not suggest an index that another aplication had suggested C .  indexes cannot be sorted D .  each application using Coherence may suggest the same set of indexes when it start

A . few B . a few C . little D . a little

A .  It saves disk space and reduces memory usage. B .  It saves disk space but has no effect on memory usage. C .  It incurs extra CPU overhead during DML as well as direct loading operations. D .  It incurs extra CPU overhead during DML but not direct loading operations. E .  It requires uncompress operation during I/O.

A . Passiveroutes are in the process of being calculated by DUAL. B . EIGRP supports VLSM, route summarization, and routing update authentication. C . EIGRP exchanges full routing table information with neighboring routers with every update. D . If the feasible successor has a higher advertised distance than the successor route, it becomes the primary route. E . A query process is used to discover a replacement for a failed route if a feasible successor is not identified from the current routing information.

A . Legacy DDR can use port information to define interesting traffic. B . Legacy DDR can configure multiple dialer configurations on the same interface. C . Legacy DDR can use ACLs to define interesting traffic. D . HDLC or PPP can be used to encapsulate ISDN D channel information. E . The BRI interfaces on ISDN routers with dialer profiles configured cannot belong to multiple dialer pools. F . Dialer profiles cannot use extended ACLs to define interesting traffic.

A .  The amount of undo retained is user controlled. B .  SecureFile LOBs can be used only for nonpartitioned tables. C .  Fragmentation is minimized by using variable-sized chunks dynamically. D .  SecureFile encryption allows for random reads and writes of the encrypted data. E .  It automatically detects duplicate LOB data and conserves space by storing only one copy.