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Which three statements concerning the use of the java.io.Serializable interface are true？（）
- A、Objects from classes that use aggregation cannot be serialized
- B、An object serialized on one JVM can be successfully deserialized on a different JVM
- C、The values in fields with the volatile modifier will NOT survive serialization and deserialization
- D、The values in fields with the transient modifier will NOT survive serialization and deserialization
- E、It is legal to serialize an object of a type that has a supertype that does NOT implement java.io.Serializable
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更多 “Which three statements concerning the use of the java.io.Serializable interface are true？（）A、Objects from classes that use aggregation cannot be serializedB、An object serialized on one JVM can be successfully deserialized on a different JVMC、The values in fields with the volatile modifier will NOT survive serialization and deserializationD、The values in fields with the transient modifier will NOT survive serialization and deserializationE、It is legal to serialize an object of a type that has a supertype that does NOT implement java.io.Serializable” 相关考题
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Which two statements are true regarding the return values of property written hashCode and equals methods from two instances of the same class？（）A、 If the hashCode values are different， the objects might be equal.B、 If the hashCode values are the same， the object must be equal.C、 If the hashCode values are the same， the objects might be equal.D、 If the hashCode values are different， the objects must be unequal.
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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.
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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.
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Which three statements concerning the use of the java.io.Serializable interface are true？（）A、Objects from classes that use aggregation cannot be serialized.B、An object serialized on one JVM can be successfully deserialized on a different JVM.C、The values in fields with the volatile modifier will NOT survive serialization and deserialization.D、The values in fields with the transient modifier will NOT survive serialization and deserialization.E、It is legal to serialize an object of a type that has a supertype that does NOT implement java.io.Serializable.
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Which two statements are true regarding transactions in an Oracle database（）A、Multiple transactions can use the same undo segment.B、A transaction is assigned an undo segment when it is started.C、More than one transaction cannot share the same extent in the undo tablespace.D、The transactions use system undo segment to store undo data if all the segments in the undo tablespaceare used.
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Which two statements are true regarding single row functions?（）A、They accept only a single argument B、They can be nested only to two levels C、Arguments can only be column values or constants D、They always return a single result row for every row of a queried table E、They can return a data type value different from the one that is referenced
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多选题Which statements are valid for a local SPAN configuration？ （）ASource and destination interface must be on the same hostBSource and destination interfaces can be on different hostsCDestination vEthernet interface can be on a different VLAN than the sourceDDestination interface can be a physical portEDestination interface cannot be a physical port
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多选题Which three concerning the use of the java.io.Serializable interface are true？（）AObjects from classes that use aggregation cannot be serialized.BArt object serialized on one JVM can be successfully deserialized on a different JVM.CThe values in fields with the volatile modifier will NOT survive serialization anddeserialization.DThe values in fields with the transient modifier will NOT survive serialization anddeserialization.EIt is legal to serialize an object of a type that has a supertype that does NOT implement java.io.Serializable.
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多选题Which two statements are true regarding transactions in an Oracle database（）AMultiple transactions can use the same undo segment.BA transaction is assigned an undo segment when it is started.CMore than one transaction cannot share the same extent in the undo tablespace.DThe transactions use system undo segment to store undo data if all the segments in the undo tablespaceare used.
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多选题Which three statements concerning the use of the java.io.Serializable interface are true？（）AObjects from classes that use aggregation cannot be serializedBAn object serialized on one JVM can be successfully deserialized on a different JVMCThe values in fields with the volatile modifier will NOT survive serialization and deserializationDThe values in fields with the transient modifier will NOT survive serialization and deserializationEIt is legal to serialize an object of a type that has a supertype that does NOT implement java.io.Serializable
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多选题You want to make use of the object features available in the database for the form module you are developing. Which three statements about object types are true? （）AAn object type is a user-defined composite data type.BThe attributes of an object type can be those of other object types.CA PL/SQL table of records is an example of a nested object type.DAn object type must be declared as a type before the actual object itself can be declared.
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多选题Which three statements concerning the use of the java.io.Serializable interface are true？（）AObjects from classes that use aggregation cannot be serialized.BAn object serialized on one JVM can be successfully deserialized on a different JVM.CThe values in fields with the volatile modifier will NOT survive serialization and deserialization.DThe values in fields with the transient modifier will NOT survive serialization and deserialization.EIt is legal to serialize an object of a type that has a supertype that does NOT implement java.io.Serializable.
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多选题Which three statements are true regarding subqueries?（）ASubqueries can contain GROUP BY and ORDER BY clausesBMain query and subquery can get data from different tablesCMain query and subquery must get data from the same tablesDSubqueries can contain ORDER BY but not the GROUP BY clauseEOnly one column or expression can be compared between the main query and subqueryFMultiple columns or expressions can be compared between the main query and subquery
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