Very long, complex expressions in program are difficult to write correctly and difficult to().
A、defend
B、detect
C、default
D、debug
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
You need to control SSH, HTTP, and Telnet access to an MX240 router through any interface.You have decided to use a firewall filter.How should you apply the firewall filter?()
A、as an outbound filter on interface fxp0
B、as an outbound filter on interface lo0
C、as an inbound filter on interface fxp0
D、as an inbound filter on interface lo0
ARP协议的功能是()。
A、由目标的IP地址求目标的MAC地址
B、由目标的MAC地址求目标的IP地址
C、由源的IP地址求源的MAC地址
D、由源的MAC地址求源的IP地址
In your database, the flash recovery area (FRA) is configured as the default for RMAN backups. You executed the following commands to configure the settings in RMAN: Which statement is true about the outcome?()
A、 Only one channel is allocated and the backup is created in the flash recovery area
B、 Only one channel is allocated and the backup is created in the destination specified for channel
C、 Two channels are allocated and backup sets are created in the destinations specified for channels 1 and 2
D、 Three channels are allocated and backup sets are created in the destinations specified for channels 1, 2, and FRA
有如下类模板定义:已知b1、b2是BigNumber的两个对象,则下列表达式中错误的是( )。
A、b1+b2
B、b1+3
C、3+b1
D、3+3