名词解释题Unique Users
名词解释题
Unique Users
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以下关于PRIMARYKEY和UNIQUE的描述中,错误的是() A、UNIQUE约束只能定义在表的单个列上B、一个表上可以定义多个UNIQUE，只能定义一个PRIMARYKEYC、在空值列上允许定义UNIQUE，不能定义PRIMARYKEYD、PRIMARYKEY和UNIQUE都可以约束属性值的唯一性
()指在单位时间内访问某一站点的所有不同用户的数量。 A、Click Throughs(点击次数)B、Click—Through Rate(点进率)C、User Sessions(访客量)D、Unique Users(单独用户)
Which two steps are needed when configuring multiple RPs using MSDP within a single PIM domain? () A. Configure a non-unique address on the loopback interface for use by the PIM RP.B. Configure MSDP with the unique address (router ID) as the local address of the peer.C. Configure MSDP with the non-unique address (router ID) as the local address of the peer.D. Configure a unique address on the loopback interface, used as the PIM RP.
Which of the following is true of an index used to support a UNIQUE constraint?() A.It must have the UNIQUE attribute.B.It cannot be created explicitly by the user.C.It must have the UNIQUE and CLUSTER attributes.D.It must have the UNIQUE WHERE NOT NULL attribute.
How many users are supported on the Cisco Unified Communications models 540 and 560 platforms？（）A、 16 users on the UC540 and 64 users on the UC560B、 32 users on the UC540 and 64 users on the UC560C、 32 users on the UC540 and 104 users on the UC560D、 16 users on the UC540 and 104 users on the UC560
Examine the command that is used to create a table： SQL CREATE TABLE orders（oid NUMBER（6） PRIMARY KEY， odate DATE， ccode NUMBER （6）， oamtNUMBER（10，2）） TABLESPACE users； Which two statements are true about the effect of the above command（）A、A CHECK constraint is created on the OID column.B、A NOT NULL constraint is created on the OID column.C、The ORDERS table is the only object created in the USERS tablespace.D、The ORDERS table and a unique index are created in the USERS tablespace.E、The ORDERS table is created in the USERS tablespace and a unique index is created on the OID columnin the SYSTEM tablespace.
For which two constraints does the Oracle Server implicitly create a unique index? （）A、NOT NULLB、PRIMARY KEYC、FOREIGN KEYD、CHECKE、UNIQUE
下面哪些可以将john添加到users数组中？（）A、$users[]=‘john’；B、array_add（$users，’john’）；C、array_push（$users，‘john’）；D、$users[“name”]=‘john’；
在数据表设计时，UNIQUE与PRIMAR YKEY两者的区别是（）A、UNIQUE要求数据表中至少存在一行数据，必须在建表后创建，而PRIMARY KEY无该限制B、UNIQUE允许空值存在，而PRIMARYKEY不允许C、创建UNIQUE后，该数据行允许被修改，而PRIMARYKEY则不允许D、UNIQUE列不能创建外键，而PRIMARYKEY可以创建外键
A company has a corporate office building that is used by 50 to 100 unique visitors each day for meetings. Users routinely report that they are unable to access the network with their laptops when visiting this location. The help desk reports that these users are not getting IP addresses automatically assigned. After an investigation， the server administrator has determined that the DHCP service is functioning， but a minimal number of addresses are available for lease. The building is on its own class Csubnet and has 250 addresses in the scope. Which of the following represents a long term solution tothe problem？（）A、 Manually delete address leases from DHCP.B、 Create reservations in DHCP for users frequently visiting this location.C、 Assign static IP addresses to visiting laptops.D、 Reduce the lease duration in the DHCP scope options to one day.
When choosing a hostname， which of the following naming conventions is most important to consider？（）A、The name is unique globallyB、The name is unique in a specified domainC、The name is not named after a person， place or thingD、The name has special meaning to the machine’s function
Which two statements are true about constraints? （）A、The UNIQUE constraint does not permit a null value for the column.B、A UNIQUE index gets created for columns with PRIMARY KEY and UNIQUE constraints.C、The PRIMARY KEY and FOREIGN KEY constraints create a UNIQUE index.D、The NOT NULL constraint ensures that null values are not permitted for the column.
Which pseudocolumn could you use to identify a unique row in a Flashback Versions Query？（）A、 XIDB、 VERSIONS_PKC、 VERSIONS_XIDD、 VERSIONS_UNIQUE
Which of the following is true of an index used to support a UNIQUE constraint?（）A、It must have the UNIQUE attribute.B、It cannot be created explicitly by the user.C、It must have the UNIQUE and CLUSTER attributes.D、It must have the UNIQUE WHERE NOT NULL attribute.
单选题Which pseudocolumn could you use to identify a unique row in a Flashback Versions Query？（）A XIDB VERSIONS_PKC VERSIONS_XIDD VERSIONS_UNIQUE
单选题Which of the following is true of an index used to support a UNIQUE constraint?（）AIt must have the UNIQUE attribute.BIt cannot be created explicitly by the user.CIt must have the UNIQUE and CLUSTER attributes.DIt must have the UNIQUE WHERE NOT NULL attribute.
多选题Which two steps are needed when configuring multiple RPs using MSDP within a single PIM domain? （）AConfigure a non-unique address on the loopback interface for use by the PIM RP.BConfigure MSDP with the unique address (router ID) as the local address of the peer.CConfigure MSDP with the non-unique address (router ID) as the local address of the peer.DConfigure a unique address on the loopback interface, used as the PIM RP.
多选题Which three statements describe user authentication in Cisco DCNM-LAN？ （）ACisco DCNM-LAN server users are local to the Cisco DCNM-LAN server. Creating， changing， and removing Cisco DCNM-LAN server users has no effect on user accounts on managed devices.BA Cisco DCNM-LAN server user that has Administrator privileges can push out changes to managed devices even if the Cisco NX-OS role that is used on the discovered device has the network operator role.CCisco DCNM-LAN user roles restrict the ability of users to make changes to Cisco DCNM-LAN server settings. Cisco NX-OS user roles enforce read/write privileges on the discovered devices.DCisco DCNM-LAN allows you to configure unique credentials for each discovered device or use default credentials when you do not configure unique credentials for a device.ECisco DCNM-LAN can use AAA servers to authenticate users. Only TACACS servers are supported.
多选题Examine the command that is used to create a table： SQL CREATE TABLE orders（oid NUMBER（6） PRIMARY KEY， odate DATE， ccode NUMBER （6）， oamtNUMBER（10，2）） TABLESPACE users； Which two statements are true about the effect of the above command（）AA CHECK constraint is created on the OID column.BA NOT NULL constraint is created on the OID column.CThe ORDERS table is the only object created in the USERS tablespace.DThe ORDERS table and a unique index are created in the USERS tablespace.EThe ORDERS table is created in the USERS tablespace and a unique index is created on the OID columnin the SYSTEM tablespace.
多选题Which two statements are true about constraints? （）AThe UNIQUE constraint does not permit a null value for the column.BA UNIQUE index gets created for columns with PRIMARY KEY and UNIQUE constraints.CThe PRIMARY KEY and FOREIGN KEY constraints create a UNIQUE index.DThe NOT NULL constraint ensures that null values are not permitted for the column.
单选题How many users are supported on the Cisco Unified Communications models 540 and 560 platforms？（）A 16 users on the UC540 and 64 users on the UC560B 32 users on the UC540 and 64 users on the UC560C 32 users on the UC540 and 104 users on the UC560D 16 users on the UC540 and 104 users on the UC560
多选题下面哪些可以将john添加到users数组中？（）A$users[]=‘john’；Barray_add（$users，’john’）；Carray_push（$users，‘john’）；D$users[“name”]=‘john’；
单选题A company has a corporate office building that is used by 50 to 100 unique visitors each day for meetings. Users routinely report that they are unable to access the network with their laptops when visiting this location. The help desk reports that these users are not getting IP addresses automatically assigned. After an investigation， the server administrator has determined that the DHCP service is functioning， but a minimal number of addresses are available for lease. The building is on its own class Csubnet and has 250 addresses in the scope. Which of the following represents a long term solution tothe problem？（）A Manually delete address leases from DHCP.B Create reservations in DHCP for users frequently visiting this location.C Assign static IP addresses to visiting laptops.D Reduce the lease duration in the DHCP scope options to one day.