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 bef

It is used only for directly connected subnets or aggregate routes.

It can only be used with LDP.

It is only used when two or more labels are stacked.

It enables the Edge LSR to request a label pop operation from its upstream neighbors.

It is requested through TDP using a special label value that is also called the implicit-null value.

It is requested through LDP using a special label value that is also called the implicit-null value.

The CoS value is trusted for 802.1p or 802.1q tagged traffic.

The voice VLAN feature is disabled by default.

The IP phone accepts the priority of all tagged and untagged traffic and sets the CoS value to 4.

When the voice VLAN feature is enabled， all untagged traffic is sent according to the default CoS priority of the port.

PortFast is automatically disabled when a voice VLAN is configured.

The default CoS value for incoming traffic is set to 0.

The modified data are not available on disk.

The modified data have been flushed out from memory.

The modified rows of the SupportCenter STAFF table have been locked.

Jack has not committed the changes after modifying the value.

Both users are accessing the database from two different machines.

The value of b is 2.

The value of a is 3.14.

The value of b is 2.00.

The value of a is 3.141.

The value of a is 3.1415.

The value of a is 3.1416.

The value of b is 2.0000.

The MTTR advisor will be disabled.

Automatic checkpoint tuning will be enabled.

The value for the LOG_CHECKPOINT_INTERVAL initialization parameter will be override the value forFAST_START_MTTR_TARGET.

The time taken to recover the instance after the crash is always exactly the same as the value given for theinitialization parameter.

The BID is made up of the bridge priority value（two bytes） and bridge MAC address （six bytes）.

The BID is made up of the bridge priority （four bits）， the system ID （12 bits）， and a bridge MAC address （48 bits）.

The BID is made up of the system ID （six bytes） and bridge priority value （two bytes）.

The system ID value is the VLAN ID （VID）.

The system ID value is a unique MAC address allocated from a pool of MAC addresses assigned to the switch or module.

The system ID value is a hex number used to measure the preference of a bridge in the spanning-tree algorithm.

All switch statements must have a default label.

There must be exactly one label for each code segment in a switch statement.

The keyword continue can never occur within the body of a switch statement.

No case label may follow a default label within a single switch statement.

A character literal can be used as a value for a case label.

The value of an int is undetermined.

The value of all numeric types is zero.

The compiler may issue an error if the variable is used before it is initialized.

The value of a String variable is  （empty string）.

The value of all object variables is null.

It is used only for directly connected subnets or aggregate routes

It can only be used with LDP.

It is only used when two or more labels are stacked.

It enables the Edge LSR to request a label pop operation from Its upstream neighbors

It is requested through TDP using a special label value that is also called the implicit-null value.

It is requested through LDP using a special label value that is also called the implicit-null value.

For non-negative values of the left operand， the >> and >>> operators will have the same effect.

The result of （-1 >> 1） is 0.

The result of （-1 >>> 1） is -1.

The value returned by >>> will never be negative as long as the value of the right operand is equal     to or greater than 1.

When using the >> operator， the leftmost bit of the bit representation of the resulting value will    always be the same bit value as the leftmost bit of the bit representation of the left operand.

The variable can be used to pass data to and from subflows.  

The value for that variable can be supplied via Application Configuration in Application Administration.  

The value for that variable is defined by the calling application.  

The variable can be used in conditional steps.  

The variable can be used to pass data to and from VoiceXML applications.

 public int MAX_LENGTH=100；

 final int MAX_LENGTH=100；

 final public int MAX_LENGTH=100；

 public final int MAX_LENGTH=100；

A value of 4 represents the Implicit NULL Label.

A value of 0 represents the IPv4 Explicit NULL Label.

A value of 1 represents the Router Alert Label. The use of this label is analogous to the use of theRouter Alert Option in IP packets （for example， ping with record route option）

A value of 2 represents the IPv6 Explicit NULL Label

A value of 1 represents the IPv1 Explicit NULL Label

A value of 3 represents the Implicit NULL Label

You use a NEXTVAL pseudo column to look at the next possible value that would be generated from a sequence, without actually retrieving the value.

You use a CURRVAL pseudo column to look at the current value just generated from a sequence, without affecting the further values to be generated from the sequence.

You use a NEXTVAL pseudo column to obtain the next possible value from a sequence by actually retrieving the value from the sequence.

You use a CURRVAL pseudo column to generate a value from a sequence that would be used for a specified database column.

If a sequence starting from a value 100 and incremented by 1 is used by more then one application, then all of these applications could have a value of 105 assigned to their column whose value is being generated by the sequence.

You use REUSE clause when creating a sequence to restart the sequence once it generates the maximum value defined for the sequence.