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Which two statements about SCSI are true？ （）
A . The bus is limited to 32 devices
B . It is a full duplex serial standard
C . It is a half-duplex serial standard
D . It allows up to 320 MB/s of shared channel bandwidth
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Which two statements about zoning are correct? （）
A . Zoning increases security.
B . DNS queries are used for software zoning.
C . Software zoning is more secure than hardware zoning.
D . When using zones and VSANs together, the zone is created first.
E . Zoning requires that VSANs be established before it becomes operational.
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Which two statements are correct about database transportation?（） (Choose two.)
A . The source and target platforms must be the same
B . Redo logs, control files and temp files are also transported
C . The transported database must have the same database identifier (DBID) as the source database and cannot be changed
D . The COMPATIBLE parameter must be set to 10.0.0.0 or higher and the database must be opened in readonly mode before being transported
E . Recovery Manager (RMAN) is used to convert the necessary data files of the database if the target platform is different and has different endian format
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Which two statements about subqueries are true? （）
A . A single row subquery can retrieve data from only one table.
B . A SQL query statement cannot display data from table B that is referred to in its subquery, unless table B is included in the main query's FROM clause.
C . A SQL query statement can display data from table B that is referred to in its subquery, without including table B in its own FROM clause.
D . A single row subquery can retrieve data from more than one table.
E . A single row subquery cannot be used in a condition where the LIKE operator is used for comparison.
F . A multiple-row subquery cannot be used in a condition where the LIKE operator is used for comparison.
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Which two statements are true regarding views?（）
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
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Which two statements about WRED are true？ （）
A . WRED can selectively discard lower priority traffic when the interface becomes congested and can provide differentiated performance characteristics for different classes of service.
B . Resource Reservation Protocol （RSVP） and WRED cannot be configured on the same interface.
C . WRED will throttle back voice traffic only as a last resort.
D . If the average queue length is greater than the minimum threshold but less than the maximum threshold， then based on the drop probability， WRED will either queue the packet or perform a random drop.
E . WRED statistically drops more packets from low-bandwidth users than high-bandwidth users. Therefore， traffic sources that generate the least traffic are more likely to be slowed down than traffic sources that generate the most traffic.
F . WRED treats non-IP traffic as precedence 4.
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Which two statements are true about alerts（）
A . Clearing an alert sends the alert to the alert history.
B . Response actions cannot be specified with server-generated alerts.
C . The nonthreshold alerts appear in the DBA_OUTSTANDING_ALERTS view.
D . Server-generated alerts notify the problems that cannot be resolved automatically and requireadministrators to be notified.
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Which two statements best describe EtherChannel？（）
A . EtherChannel technology helps aggregate traffic grouping multiple，full-duplex point-to-point linkstogether
B . EtherChannel technology is based on the 802.1 IEEE stand
C . EtherChannel can aggregate up to 800 Mbps，8 Gbps，or Gbps of aggregate bandwidth for a Fast EtherChannel，Gigabit EtherChannel，or 10 Gigabit EtherChannel connection respectively
D . EtherChannel is defined for Rapid Spanning Tree for faster convergence
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Which two statements are true about checkpointing（）
A . The checkpoint frequency decreases with the smaller redo log file size.
B . It ensures that all committed data is written to the data files during normal shutdown.
C . The frequent full checkpoint in a database can cause the overall degradation of the database performance.
D . It prompts the Checkpoint （CKPT） process to write data to the data files and redo information to the online redo log files.
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Which two statements are true regarding listeners（）
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.
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Which two statements are true about constraints? （）
A . The UNIQUE constraint does not permit a null value for the column.
B . A UNIQUE index gets created for columns with PRIMARY KEY and UNIQUE constraints.
C . The PRIMARY KEY and FOREIGN KEY constraints create a UNIQUE index.
D . The NOT NULL constraint ensures that null values are not permitted for the column.
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Which two statements about zoning are correct？（）
A . Zoning increases security.
B . DNS queries are used for software zoning.
C . Software zoning is more secure than hardware zoning.
D . When using zones and VSANs together， the zone is created first.
E . Zoning requires that VSANs be established before it becomes operational.
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Which two statements correctly describe VTP？（）
A . Transparent mode always has a configuration revision number of 0.
B . Transparent mode cannot modify a VLAN database.
C . Client mode cannot forward received VTP advertisements.
D . Client mode synchronizes its VLAN database from VTP advertisements.
E . Server mode can synchronize across VTP domains.
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Which two statements are true？（）
A . It is possible for more than two threads to deadlock at once.
B . The JVM implementation guarantees that multiple threads cannot enter into a deadlocked state.
C . Deadlocked threads release once their sleep（） method’s sleep duration has expired.
D . Deadlocking can occur only when the wait（）， notify（）， and notifyAll（） methods are used incorrectly.
E . It is possible for a single-threaded application to deadlock if synchronized blocks are used incorrectly.
F . If a piece of code is capable of deadlocking， you cannot eliminate the possibility ofdeadlocking by insertinginvocations of Thread.yield（）.
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Which two statements describe traffic policing？（）
A . Traffic bursts are smoothed out by queuing the excess traffic to produce a steadier flow of data
B . Excess traffic is buffered so that the traffic remains within the desired rate.
C . Packets that conform to traffic policies are not delayed.
D . Packet marking is available and allows excess packets to be re-marked with a lower priorit
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Which two statements best describe CBWFQ？（）
A . The CBWFQ scheduler provides a guaranteed minimum amount of bandwidth to each class.
B . CBWFQ services each class queue using a strict priority scheduler.
C . The class-default queue only supports WFQ.
D . Inside a class queue， processing is always FIFO， except for the class-default queue.
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Which two multicast protocol statements are true？ （Choose two.） （）
A . Dense mode multicast requires explicit join messages from their members.
B . Dense mode multicast uses a push model to flood traffic throughout the network and then prunes the unwanted traffic.
C . Sparse mode multicast uses a pull model to send multicast traffic to where it is requested.
D . Sparse mode uses reverse path forwarding （RPF） to prune off redundant flows.
E . The primary use of sparse mode multicast is for test labs and router performance testing.
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Which two statements complete a transaction? （）
A . DELETE employees;
B . DESCRIBE employees;
C . ROLLBACK TO SAVEPOINT C;
D . GRANT SELECT ON employees TO SCOTT;
E . ALTER TABLE employees SET UNUSED COLUMN sal;
F . SELECT MAX(sal) FROM employees WHERE department_id = 20
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Which two statements are true?（）
A . It is possible for more than two threads to deadlock at once.
B . The JVM implementation guarantees that multiple threads cannot enter into a deadlocked state.
C . Deadlocked threads release once their sleep() method's sleep duration has expired.
D . Deadlocking can occur only when the wait(), notify(), and notifyAll() methods are used incorrectly.
E . It is possible for a single-threaded application to deadlock if synchronized blocks are used incorrectly.
F . If a piece of code is capable of deadlocking, you cannot eliminate the possibility of deadlocking by inserting invocations of Thread.yield().
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Which two of statements are true？（）
A . It is possible to synchronize static methods.
B . When a thread has yielded as a result of yield（）， it releases its locks.
C . When a thread is sleeping as a result of sleep（）， it releases its locks.
D . The Object.wait（） method can be invoked only from a synchronized context.
E . The Thread.sleep（） method can be invoked only from a synchronized context.
F . When the thread scheduler receives a notify（） request， and notifies a thread， that thread immediately releases its lock.
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Which two statements are correct? Choose two answers.
