参考答案和解析
标准答案:对
更多“BLER的全称是Block Error Ratio。()”相关问题
  • 第1题:

    Which the statement is true?()

    • A、 The Error class is a Runtime Exception.
    • B、 No exceptions are subclasses of Error.
    • C、 Any statement that may throw an Error must be enclosed in a try block.
    • D、 any statement that may throw an Exception must be enclosed in a try block.
    • E、 Any statement that may throw an Runtime Exception must be enclosed in a try block.

    正确答案:B

  • 第2题:

    传输信道的BLER测量值是否收敛于目标值可以用来衡量外环功控性能的好坏,因此,用正确的方法统计出传输信道的BLER测量值就显得十分重要,在实际网络优化过程中,如何正确获得的BLER测量统计值?并分析一下直接把整个测试过程中的BLER测量值做平均,其结果作为BLER测量的统计值不可行的原因?


    正确答案:通常,将ErrBlockNum累积值除以TotalBlockNum累积值就可以得到正确的BLER测量的统计值。一般情况下,我们把整个测试过程中的BLER测量值做平均,其结果作为BLER测量的统计值。
    但是,这个结果并不是在任何情况下都是正确的。因为每一次的每个传输信道的BLER测量值都是根据本次测量间隔内的传输信道误块数除以总块数得到的。如果总块数为0,则该次BLER测量值依然上报为0。所以,如果在整个测试过程中,如果有传输信道总块数为0的情况,将该传输信道的BLER测试值的均值作为BLER测量的统计值就是错误的,结果会偏小。当然无论实时业务还是非实时业务,无论信令传输信道还是业务传输信道,都会出现传输信道总块数为0的情况。

  • 第3题:

    While working on the database, you receive the following error:        01578: ORACLE data block corrupted (file# 6, block # 54)        ORA-01110 : data file 6: ’u01/oracle/oradata/data1.dbf’   You decide to recover the corrupted data block by using the Block Media Recovery feature. Which option is NOT a disadvantage of using block media recovery?()

    • A、 Block Media Recovery must be used with RMAN.
    • B、 You must perform complete recovery of individual blocks.
    • C、 You must have a full RMAN backup, not an incremental backup.
    • D、 You must use the DBVERIFY utility before using the Block Media Recovery feature.

    正确答案:D

  • 第4题:

    Identify the two situations in which the alert log file is updated with details. ()

    • A、Running a query on a table returns "ORA-600: Internal Error."
    • B、Inserting a value in a table returns "ORA-01722: invalid number."
    • C、Creating a table returns "ORA-00955: name is already used by an existing object."
    • D、Inserting a value in a table returns "ORA-00001: unique constraint (SYS.PK_TECHP) violated."
    • E、Rebuilding an index using ALTER INDEX ...REBUILD fails with an error "ORA-01578: ORACLE data block corrupted (file # 14, block # 50).

    正确答案:A,E

  • 第5题:

    You issued the following command to analyze the SCOTT.EMP table for block corruption:   ANALYZE TABLE SCOTT.EMP VALIDATE STRUCTURE;  You received the following error:   ORA-01578: ORACLE data block corrupted  (file # %s, block # %s)   How will you resolve the block corruption problem?()

    • A、 by using the DBMS_REPAIR package
    • B、 by using the DB_BLOCK_CHECKING parameter
    • C、 by using the DBVERIFY utility
    • D、 will not be completely resolved until the hardware fault is corrected

    正确答案:D

  • 第6题:

    You issue the following statement:   SQL> SELECT FIRSTNAME, LASTNAME FROM HR.EMPLOYEE;  You receive the following error:         01578: ORACLE data block corrupted (file# 6, block # 54)        ORA-01110 : data file 6: ’u01/oracle/oradata/data1.dbf’   How will you resolve this problem of data block corruption by reducing the mean time to recover (MTTR)?()

    • A、 by using the DBMS_REPAIR package
    • B、 by using the DBVERIFY utility
    • C、 by using Block Media Recovery
    • D、 by issuing the ANALYZE TABLE HR.EMPLOYEES VALIDATE STRUCTURE command

    正确答案:C

  • 第7题:

    单选题
    You issue the following statement:   SQL> SELECT FIRSTNAME, LASTNAME FROM HR.EMPLOYEE;  You receive the following error:         01578: ORACLE data block corrupted (file# 6, block # 54)        ORA-01110 : data file 6: ’u01/oracle/oradata/data1.dbf’   How will you resolve this problem of data block corruption by reducing the mean time to recover (MTTR)?()
    A

     by using the DBMS_REPAIR package

    B

     by using the DBVERIFY utility

    C

     by using Block Media Recovery

    D

     by issuing the ANALYZE TABLE HR.EMPLOYEES VALIDATE STRUCTURE command


    正确答案: C
    解析: 暂无解析

  • 第8题:

    填空题
    The ratio of a to b is the same as the ratio of 1.4 to 7. If a=14, what is the value of b?____

    正确答案: 70
    解析:
    因为a÷b=1.4÷7,当a=14时,经计算b=70。

  • 第9题:

    单选题
    For a given fuel, a change in the compression ratio will affect the ignition lag by which of the listed means?()
    A

    An increase in compression ratio will increase the ignition lag

    B

    An increase in compression ratio will decrease the ignition lag

    C

    A decrease in compression ratio will decrease the ignition lag

    D

    A decrease in ignition lag will increase the compression ratio


    正确答案: C
    解析: 暂无解析

  • 第10题:

    单选题
    Which type of PL/SQL construct would you use to automatically correct the error resulting from a statement that was suspended due to a space/x7frelated problem? ()
    A

    function

    B

    package

    C

    procedure

    D

    database trigger

    E

    anonymous PL/SQL block


    正确答案: A
    解析: 暂无解析

  • 第11题:

    单选题
    You received the following error:   ORA-01578: ORACLE data block corrupted   (file # %s, block # %s)   Which file will you check to view additional information regarding the cause of this error?()
    A

    the alert log file and the trace files

    B

     the redo log files

    C

     the control file

    D

     the change tracking file


    正确答案: C
    解析: 暂无解析

  • 第12题:

    单选题
    The ratio of the height of a vessel’s rudder to its width is referred to as the().
    A

    aspect ratio

    B

    constriction ratio

    C

    rudder ratio

    D

    steering ratio


    正确答案: D
    解析: 暂无解析

  • 第13题:

    当RNC发现测量BLER值高于目标BLER值时,会如何调整目标SIR值()


    正确答案:提高

  • 第14题:

    以下对于LTE功率控制描述正确的是()

    • A、功率控制通过调整发射功率,使业务质量刚好满足BLER(Block Error Rate)要求,避免功率浪费
    • B、LTE干扰主要来自邻区,功率控制可减小对邻区的干扰
    • C、上行功率控制减少UE 电源消耗,下行功率控制减少eNodeB 电源消耗
    • D、以上都正确

    正确答案:D

  • 第15题:

    Which type of PL/SQL construct would you use to automatically correct the error resulting from a statement that was suspended due to a space/x7frelated problem? ()

    • A、function
    • B、package
    • C、procedure
    • D、database trigger
    • E、anonymous PL/SQL block

    正确答案:D

  • 第16题:

    Which type of PL/SQL construct would you use to automatically correct the error resulting from a statement that was suspended due to a space-related problem?()

    • A、 functions
    • B、 package
    • C、 procedure
    • D、 database trigger
    • E、 anonymous PL/SQL block

    正确答案:D

  • 第17题:

    You received the following error:   ORA-01578: ORACLE data block corrupted   (file # %s, block # %s)   Which file will you check to view additional information regarding the cause of this error?()

    • A、the alert log file and the trace files
    • B、 the redo log files
    • C、 the control file
    • D、 the change tracking file

    正确答案:A

  • 第18题:

    You are creating a stored procedure that will delete data from the Contact table in a SQL Server 2005 database. The stored procedure includes the following Transact-SQL statement to handle any errors that occur. BEGIN TRY   BEGIN TRANSACTION   DELETE FROM Person.Contact WHERE ContactID = @ContactID COMMIT TRANSACTION END TRY   BEGIN CATCH   DECLARE @ErrorMessage nvarchar(2000) DECLARE @ErrorSeverity int DECLARE @ErrorState int SELECT @ErrorMessage = ERROR MESSAGE(),@ErrorSeverity=ERROR SEVERITY(),@ErrorState = ERROR STATE() RAISERROR (@ErrorMessage, @ErrorSeverity, @ErrorState) END CATCH;      You test the stored procedure and discover that it leaves open transactions. You need to modify the stored procedure so that it properly handles the open transactions. What should you do?()

    • A、Add a COMMIT TRANSACTION command to the CATCH block.
    • B、Remove the COMMIT TRANSACTION command from the TRY block.
    • C、Add a ROLLBACK TRANSACTION command to the CATCH block.
    • D、Add a ROLLBACK TRANSACTION command to the TRY block.

    正确答案:C

  • 第19题:

    问答题
    If there are only red, blue, and green marbles in a jar, what is the ratio of red to blue marbles?  (1) The ratio of red to green marbles is 2:3.  (2) The ratio of green to blue marbles is 6:5.

    正确答案: C
    解析:
    题目中含三个未知量,(1)、(2)条件相结合可以计算红色和蓝色珠子的比例,两个条件无法单独决定,故本题选C项。

  • 第20题:

    多选题
    Identify the two situations in which the alert log file is updated with details. ()
    A

    Running a query on a table returns ORA-600: Internal Error.

    B

    Inserting a value in a table returns ORA-01722: invalid number.

    C

    Creating a table returns ORA-00955: name is already used by an existing object.

    D

    Inserting a value in a table returns ORA-00001: unique constraint (SYS.PK_TECHP) violated.

    E

    Rebuilding an index using ALTER INDEX ...REBUILD fails with an error ORA-01578: ORACLE data block corrupted (file # 14, block # 50).


    正确答案: B,C
    解析: 暂无解析

  • 第21题:

    单选题
    You issued the following command to analyze the SCOTT.EMP table for block corruption:   ANALYZE TABLE SCOTT.EMP VALIDATE STRUCTURE;  You received the following error:   ORA-01578: ORACLE data block corrupted  (file # %s, block # %s)   How will you resolve the block corruption problem?()
    A

     by using the DBMS_REPAIR package

    B

     by using the DB_BLOCK_CHECKING parameter

    C

     by using the DBVERIFY utility

    D

     will not be completely resolved until the hardware fault is corrected


    正确答案: D
    解析: 暂无解析

  • 第22题:

    单选题
    Which the statement is true?()
    A

     The Error class is a Runtime Exception.

    B

     No exceptions are subclasses of Error.

    C

     Any statement that may throw an Error must be enclosed in a try block.

    D

     any statement that may throw an Exception must be enclosed in a try block.

    E

     Any statement that may throw an Runtime Exception must be enclosed in a try block.


    正确答案: E
    解析: 暂无解析

  • 第23题:

    单选题
    Which type of PL/SQL construct would you use to automatically correct the error resulting from a statement that was suspended due to a space-related problem?()
    A

     functions

    B

     package

    C

     procedure

    D

     database trigger

    E

     anonymous PL/SQL block


    正确答案: B
    解析: 暂无解析