网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
Which object may be used during query optimization to improve the performance for a subset of SELECT queries?（）
- A、MQT
- B、Trigger
- C、Read Only Cursor
- D、Stored Procedure
参考答案
更多 “Which object may be used during query optimization to improve the performance for a subset of SELECT queries?（）A、MQTB、TriggerC、Read Only CursorD、Stored Procedure” 相关考题
考题
Which of the listed devices may be used as a digital device?A.variable resistorB.diodeC.strain gaugeD.thermistor
考题
Coast Guard approved buoyant work vests ______．A.may be substituted for 10 percent of the required life preserversB.should be stowed adjacent to lifeboats and emergency stationsC.may be used by boat crews and line handlers during lifeboat drillsD.should be used when carrying out duties near a weather deck's edge
考题
Which statement is TRUE concerning buoyant work vests aboard tankers ________．A.They may be worn while working on deck but not while working over the sideB.They must be used only under supervision of a designated ship's officerC.They will be accepted for up to 10% of the required life preserversD.They may be worn during drills
考题
The operation of which aids to navigation may be suspended during war or national emergency ________．A.Navigational satellitesB.LoranC.OmegaD.Any of the above
考题
Even for one single connection, the retransmission time should not be fixed.A connection may be able to send segments and receive （74）faster during nontraffic period than during congested periods. TCP uses the dynamic retransmission time,a transmission time is different for each connection and which may be changed during the same connection.
A.connections
B.requests
C.acknowledgments
D.datagrams
考题
Which two statements are true about the hashCode method？（）A、 The hashCode method for a given class can be used to test for object equality and object inequality for that class.B、 The hashCode method is used by the java.util.SortedSet collection class to order theelements within that set.C、 The hashCode method for a given class can be used to test for object inequality， but NOT object equality， for that class.D、 The only important characteristic of the values returned by a hashCode method is that the distribution of values must follow a Gaussian distribution.E、 The hashCode method is used by the java.util.HashSet collection class to group the elements within that set into hash buckets for swift retrieval.
考题
Which statements concerning the value of a member variable are true， when no explicit assignments have been made？（） A、The value of an int is undetermined.B、The value of all numeric types is zero.C、The compiler may issue an error if the variable is used before it is initialized.D、The value of a String variable is "" （empty string）.E、The value of all object variables is null.
考题
Which two are valid locking levels that are used by transactions in an Oracle database？（）A、row levelB、block levelC、object levelD、schema levelE、database level
考题
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.
考题
Which two commands are used during the password recovery process?（）A、clear system loginB、boot -sC、recoveryD、delete system root-authentication
考题
Which of the following OSPF messages contains entire complete LSAs used during the database exchange process?（）A、LSRB、LSAckC、LSUD、DDE、Hello
考题
Which command can be used to display information from the PvDv object class in the ODM？（） A、odmlistB、odmshowC、lsdev -PD、lsattr -El
考题
Which statement is true about the database and database-user used during installation of IMS Server？（）A、A preexisting database user may be used but a new database has to be created during installation.B、A preexisting database may be used but a new database user has to be created during installation.C、A preexisting database and user may be used or a new database and user are created during installation.D、A preexisting database and user cannot be used； a new database and user are created during installation.
考题
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.
考题
Which is an example of a dynamic SELECT statement? （）A、A query whose object names change during its execution. B、A query whose object names are not known until run time. C、A query whose bind variables values change during execution. D、A query whose bind variable values are not known until run time.
考题
单选题Which of the following OSPF messages contains entire complete LSAs used during the database exchange process?（）A
LSRB
LSAckC
LSUD
DDE
Hello
考题
单选题（）is a property of object-oriented software by which an abstract operation may be performed in different ways in different classes.A
MethodB
PolymorphismC
InheritanceD
Encapsulation
考题
单选题Which class is used to specify a set of features to support on the XrnlReader object created by the Create method？（）A
XmlReaderSettingsB
XmlSecureResolverC
XmlValidatingReaderD
XmlTextReaderSelectMany（c = c.CustomerAddresses）.Count（）
考题
多选题Which statements concerning the value of a member variable are true， when no explicit assignments have been made？（）AThe value of an int is undetermined.BThe value of all numeric types is zero.CThe compiler may issue an error if the variable is used before it is initialized.DThe value of a String variable is （empty string）.EThe value of all object variables is null.
考题
单选题The operation of which aids to navigation may be suspended during war or national emergency（）.A
Navigational satellitesB
LoranC
OmegaD
Any of the above
考题
多选题Which the two are true about the JSTL core iteration custom tags？（）AIt may iterate over arrays， collections， maps and strings.BThe body of the tag may contain EL code， but not scripting code.CWhen looping over collections， a loop status object may be used in the tag body.DIt may iterate over a map， but only the key of the mapping may be used in the tag body.EWhen looping over integers （for example begin1=’1’ end=’10’）， a loop status object may not be used in the tag body.
考题
单选题Which is an example of a dynamic SELECT statement? （）A
A query whose object names change during its execution. B
A query whose object names are not known until run time. C
A query whose bind variables values change during execution. D
A query whose bind variable values are not known until run time.
考题
单选题Which object may be used during query optimization to improve the performance for a subset of SELECT queries?（）A
MQTB
TriggerC
Read Only CursorD
Stored Procedure
考题
单选题Which statement is true about the database and database-user used during installation of IMS Server？（）A
A preexisting database user may be used but a new database has to be created during installation.B
A preexisting database may be used but a new database user has to be created during installation.C
A preexisting database and user may be used or a new database and user are created during installation.D
A preexisting database and user cannot be used； a new database and user are created during installation.
考题
单选题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.
考题
多选题Which two statements are true about the hashCode method？（）AThe hashCode method for a given class can be used to test for object equality and object inequality for that class.BThe hashCode method is used by the java.util.SortedSet collection class to order theelements within that set.CThe hashCode method for a given class can be used to test for object inequality， but NOT object equality， for that class.DThe only important characteristic of the values returned by a hashCode method is that the distribution of values must follow a Gaussian distribution.EThe hashCode method is used by the java.util.HashSet collection class to group the elements within that set into hash buckets for swift retrieval.
考题
单选题When the engine room is put in standby condition, the engineer in charge of the watch need not to（）A
ensure all machinery which may be used during maneuvering is in readyB
ensure an adequate reserve of power is available for steering gear and other requirementsC
keep the main propulsion unit controls continuously attended when in the manual mode of operationD
ensure all machinery which may be used during maneuvering is running stably
考题
单选题Seawater may be used for drinking（）.A
under no conditionsB
at a maximum rate of two ounces per dayC
if gathered during or immediately after a hard rainD
after mixing with an equal quantity of fresh water
热门标签
最新试卷
