[多项选择]Which three statements are true?（）
A. A final method in class X can be abstract if and only if X is abstract.
B. A protected method in class X can be overridden by any subclass of X.
C. A private static method can be called only within other static methods in class X.
D. A non-static public final method in class X can be overridden in any subclass of X.
E. A public static method in class X can be called by a subclass of X without explicitly referencing the class X.
F. A method with the same signature as a private final method in class X can be implemented in a subclass of X.
G. A protected method in class X can be overridden by a subclass of X only if the subclass is in the same package as X.

[多项选择]Which three statements must be true before transporting a tablespace from a database on one platform to a database on another platform?（） (Choose three.)
A. Both source and target database must be the same character set
B. Both source and target database must have the same endian format
C. The COMPATIBLE parameter must be the same in the source and target databases.
D. The minimum compatibility level for both the source and target database must be 10.0.0.
E. All read-only and offline data files that belong to the tablespace to be transported must be platform aware.

[多项选择]Examine these two statements:Which three are true about the MRKT tablespace?（）
A. The MRKT tablespace is created as a small file tablespace, because the file size is less than the minimum required for big file files.
B. The MRKT tablespace may be dropped if it has no contents.
C. Users who were using the old default tablespace will have their default tablespaces changed to the MRKT tablespace.
D. No more data files can be added to the tablespace.
E. The relative file number of the tablespace is not stored in rowids for the table rows that are stored in the MRKT tablespace.

[多项选择]Which three statements are true concerning unplugging a pluggable database (PDB)?（）
A. The PDB must be open in read only mode.
B. The PDB must be dosed.
C. The unplugged PDB becomes a non-cdb.
D. The unplugged PDB can be plugged into the same multitenant container database (CDB)
E. The unplugged PDB can be plugged into another cdb.
F. The PDB data files are automatically removed from disk.

[多项选择]Which three statements are true about using flashback database in a multitenant container database(CDB)?（）
A. The root container can be flashed back without flashing back the pluggable databases (PDBs).
B. To enable flashback database, the CDB must be mounted.
C. Individual PDBs can be flashed back without flashing back the entire cdb.
D. The DB_FLASHBACK RETENTION_TARGET parameter must be set to enable flashback of the cdb.
E. A CDB can be flashed back specifying the desired target point in time or an SCN, but not a restore point.

[多项选择]Which three statements are true concerning the multitenant architecture?（）
A. Each pluggable database (PDB) has its own set of background processes.
B. A PDB can have a private temp tablespace.
C. PDBs can share the sysaux tablespace.
D. Log switches occur only at the multitenant container database (CDB) level.
E. Different PDBs can have different default block sizes.
F. PDBs share a common system tablespace.
G. Instance recovery is always performed at the CDB level.

[多项选择]Which three statements are true of dynamic routing protocols?（）
A. They are scalable.
B. They are Dijkstra based.
C. They share network layer reach ability information among neighbors.
D. They automate next hopdecisions.
E. They are tolerant of configuration errors.

[多项选择]Which three statements are true about persistent configuration?（）
A. A user cannot set privileges on the persistent lightweight jobs
B. Persistent lightweight jobs generate a large amount of metadata
C. It is possible to create fully self-contained persistent lightweight jobs
D. The use of a template is mandatory to create persistent lightweight jobs
E. Persistent lightweight jobs are useful when users need to create a large number of jobs in a short time

[多项选择]Which three statements are true about a registration server in a community?（） (Choose three.)
A. It is a hub device installed in the community.
B. A community can have one or more registration servers.
C. It shows the serial numbers of all devices in the community.
D. It stores network and community information for each device.
E. It is required for tunnel formation between different WX devices in the same community.

[多项选择]Which three statements are true about IP multicast configuration?（）
A. PIM sparse - dense mode and PIM dense mode require an RP on the network.
B. PIM sparse mode and PIM dense mode require an RP on the network.
C. PIM sparse mode interfaces are always added to the multicast routing table in a router.
D. PIM sparse mode and PIM sparse - dense mode require an RP on the network.
E. PIM dense mode interfaces are always added to the multicast routing table in a router.
F. PIM sparse - dense mode acts as PIM dense mode if an RP is not known.

[多项选择]Which three statements are true regarding the Network Time Protocol (NTP) in JUNOS platforms?（）
A. MD5 authentication is supported.
B. A client always synchronizes to a server even when the difference between the server clock and the local clock differs by a large amount.
C. JUNOS software can provide a primary time reference.
D. The boot-server configuration allows a router to synchronize its clock when it boots up, regardless of the offset between the NTP clock source and its internal clock.
E. It is useful to correlate timestamps on log files and other events for troubleshooting and forensics.

[多项选择]Which three statements are true about adaptive SQL plan management?（）
A. It automatically performs verification or evolves non-accepted plans, in COMPREHENSIVE mode when they perform better than existing accepted plans.
B. The optimizer always uses the fixed plan, if the fixed plan exists in the plan baseline.
C. It adds new, bettor plans automatically as fixed plans to the baseline.
D. The non-accepted plans are automatically accepted and become usable by the optimizer if they perform better than the existing accepted plans.
E. The non-accepted plans in a SQL plan baseline are automatically evolved, in COMPREHENSIVE mode, during the nightly maintenance window and a persistent verification report is generated.

[多项选择]Which three statements are true about the Internet Group Management Protocol (IGMP)? （）
A. There are three IGMP modes: dense mode, sparse mode, and sparse - dense mode
B. IGMP is used to register individual hosts with a multicast group
C. IGMP version 3 enables a multicast receiving host to specify to the router which sources it should forward traffic from
D. IGMP messages a re IP datagrams with a protocol value of 2, destination address of 224.0.0.2, and a TTL value of 1
E. IGMP is a multicast routing protocol that makes packet - forwarding decisions independent of other routing protocols such as EIGRP
F. IGMP snooping ru ns on Layer 3 routers

[多项选择]Which three statements are true about memory buffer allocation by a MySQL Server?（）
A. Global buffers such as the InnoDB buffer pool are allocated after the server starts, and are never freed
B. Thread buffers are allocated when a client connects, and are freed when the client disconnects
C. Buffers that are needed for certain operation are allocated when the operation starts, and freed when it ends
D. User buffers are allocated at server startup and freed when the user is dropped
E. All dynamic buffers that are set with a SET GLOBAL statement immediately get allocated globally, and are never freed

[多项选择]Which three statements are true about Flashback Database?（）
A. Flashback logs are written sequentially, and are archived.
B. Flashback Database uses a restored control file to recover a database.
C. The Oracle database automatically creates, deletes, and resides flashback logs in the Fast Recovery Area.
D. Flashback Database can recover a database to the state that it was in before a reset logs operation.
E. Flashback Database can recover a data file that was dropped during the span of time of the flashback.
F. Flashback logs are used to restore to the blocks' before images, and then the redo data may be used to roll forward to the desired flashback time.

[多项选择]Which three statements are true about Oracle Data Pump export and import operations?（）
A. You can detach from a data pump export job and reattach later.
B. Data pump uses parallel execution server processes to implement parallel import.
C. Data pump import requires the import file to be in a directory owned by the oracle owner.
D. The master table is the last object to be exported by the data pump.
E. You can detach from a data pump import job and reattach later.

[多项选择]Which three statements are true about Automatic Workload Repository (AWR)?（）
A. All AWR tables belong to the SYSTEM schema.
B. The AWR data is stored in memory and in the database.
C. The snapshots collected by AWR are used by the self-tuning components in the database
D. AWR computes time model statistics based on time usage for activities, which are displayed in the v$SYS time model and V$SESS_TIME_MODEL views.
E. AWR contains system wide tracing and logging information.

[多项选择]Which three statements are true when working with high-availability clusters? (Choose three.)（）
A. The valid cluster-id range is between 0 and 255.
B. Junos OS security devices can belong to more than one cluster if cluster virtualization is enabled.
C. If the cluster-id value is set to 0 on a Junos security device, the device will not participate in the cluster.
D. A reboot is required if the cluster-id or node value is changed.
E. Junos OS security devices can belong to one cluster only.