名词解释题first buffer
名词解释题
first buffer
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（ 18 ） 下列语句中，错误的是A ） const int buffer=256;B ） const double *point;C ） int const buffer=256;D ） double * const point;
以下指令中与LEA BX, BUFFER功能等价的是A.MOV BX, BUFFERB.MOV BX, SEG BUFFERC.MOV BX, [BUFFER]D.MOV BX, OFFSET BUFFER
fwrite函数的一般调用形式是A．fwrite(buffer,count,size,fp);B．fwrite(fp,size,count,buffer);C．fwrite(fp,count,size,buffer);D．fwrite(buffer,size,count,fp);
Giventhismethodinaclass:publicStringtoString(){StringBufferbuffer=newStringBuffer();buffer.append(??);buffer.append(this.name);buffer.append(??);returnbuffer.toString();}Whichistrue?() A.ThiscodeisNOTthread-safe.B.TheprogrammercanreplaceStringBufferwithStringBuilderwithnootherchanges.C.ThiscodewillperformwellandconvertingthecodetouseStringBuilderwillnotenhancetheperformance.D.Thiscodewillperformpoorly.Forbetterperformance，thecodeshouldberewritten：return““+this.name+“”；
In a recent Automatic Workload Repository (AWR) report for your database, you notice a high number of buffer busy waits. The database consists of locally managed tablespaces with free list managed segments.On further investigation, you find that buffer busy waits is caused by contention on data blocks.Which option would you consider first to decrease the wait event immediately?（）A. Decreasing PCTUSEDB. Decreasing PCTFREEC. Increasing the number of DBWN processD. Using Automatic Segment Space Management (ASSM)E. Increasing db_buffer_cache based on the V$DB_CACHE_ADVICE recommendation
Which statement describes queue and buffer managment in the E－series router?() A. Buffer memory is managed dynamically in the I/O module.B. Buffer memory is managed dynamically in the switch fabric.C. Buffer memory is managed dynamically on egress line modules.D. Buffer memory is managed dynamically on ingress line modules
Lossless Ethernet for FCoE is achieved through the use of which features？（）A、 Priority flow controlB、 Buffer-to-buffer creditsC、 TCP retransmissionD、 Ethernet checksumE、 QoS policies
Which statement describes queue and buffer managment in the E-series router?（）A、Buffer memory is managed dynamically in the I/O module.B、Buffer memory is managed dynamically in the switch fabric.C、Buffer memory is managed dynamically on egress line modules.D、Buffer memory is managed dynamically on ingress line modules
You noticed that large memory allocations for the Oracle backup and restore operations are causing a performance overhead on the shared pool. Which memory structure would you configure to avoid this performance overhead？（）A、 recycle buffer cacheB、 large poolC、 streams poolD、 keep buffer cacheE、 redo log buffer
fwrite函数的一般调用形式是（）。A、fwrite（buffer，count，size，fp）B、fwrite（fp，size，count，buffer）C、fwrite（fp，count，size，buffer）D、fwrite（buffer，size，count，fp）
以下fread函数的调用形式中，参数类型正确的是（）A、fread（unsignedsize，unsignedn，char*buffer，FILE*fp）B、fread（char*buffer，unsignedsize，unsignedn，FILE*fp）C、fread（unsignedsize，unsignedn，FILE*fp，char*buffer）D、fread（FILE*fp，unsignedsize，unsignedn，char*buffer）
Given this method in a class： public String toString（） { StringBuffer buffer = new StringBuffer（）； buffer.append（‟‟）； buffer.append（this.name）； buffer.append（‟‟）； return buffer.toString（）； } Which is true？（） A、 This code is NOT thread-safe.B、 The programmer can replace StringBuffer with StringBuilder with no other changes.C、 This code will perform well and converting the code to use StringBuilder will not enhance the performance.D、 This code will perform poorly. For better performance， the code should be rewritten： return ““+ this.name + “”；
Which is the correct description of a pinned buffer in the database buffer cache（）A、The buffer is currently being accessed.B、The buffer is empty and has not been used.C、The contents of the buffer have changed and must be flushed to the disk by the DBWn process. D、The buffer is a candidate for immediate aging out and its contents are synchronized with the block contents on the disk.
You are creating an undo buffer that stores data modifications.You need to ensure that the undo functionality undoes the most recent data modifications first.You also need to ensure that the undo buffer permits the storage of strings only.Which code segment should you use？（）A、Stackstring undoBuffer=new Stackstring（）；B、Stack undoBuffer=new Stack（）；C、Queuestring undoBuffer=new Queuestring（）；D、Queue undoBuffer=new Queue（）；
单选题An application accesses a small lookup table frequently. You notice that the required data blocks are getting aged out of the default buffer cache. How would you guarantee that the blocks for the table never age out?（）AConfigure the KEEP buffer pool and alter the table with the corresponding storage clause.BIncrease the database buffer cache size.CConfigure the RECYCLE buffer pool and alter the table with the corresponding storage clause.DConfigure Automata Shared Memory Management.EConfigure Automatic Memory Management
单选题You noticed that large memory allocations for the Oracle backup and restore operations are causing a performance overhead on the shared pool. Which memory structure would you configure to avoid this performance overhead？（）A recycle buffer cacheB large poolC streams poolD keep buffer cacheE redo log buffer
单选题Which is the correct description of a pinned buffer in the database buffer cache（）AThe buffer is currently being accessed.BThe buffer is empty and has not been used.CThe contents of the buffer have changed and must be flushed to the disk by the DBWn process. DThe buffer is a candidate for immediate aging out and its contents are synchronized with the block contents on the disk.
单选题在文件中用来写一组数据，buffer：是一个指针，size：是要写的字节，count：是要写多少个数据项，fp：文件型指针，一般调用形式是（）Awrite（buffer，size，count，fp）Bfprinff（buffer，size，count，fp）Cfwrite（buffer，size，count，fp）Dfwrite（buffer，size，count，p）
单选题能够在页面中关闭缓存的是（）。A%@Transaction=TRUE%BResponse.Buffer=TrueCResponse.Buffer=falseDRequest.Querystring
单选题You are designing a Windows Azure application. The application will use a Windows Azure AppFabric Service Bus message buffer. You need to recommend an approach for ensuring that only authorized users can discover and use the message buffer. What should you recommend？（）A Make the message buffer discoverable to listeners and require authorization.B Make the message buffer discoverable to managers and do not require authorization.C Make the message buffer publicly discoverable. Include a Simple Web Token （SWT） in each message.D Make the message buffer discoverable to managers. Include a Simple Web Token （SWT） in each message.
单选题In a recent Automatic Workload Repository (AWR) report for your database, you notice a high number of buffer busy waits. The database consists of locally managed tablespaces with free list managed segments. On further investigation, you find that buffer busy waits is caused by contention on data blocks. Which option would you consider first to decrease the wait event immediately?（）ADecreasing PCTUSEDBDecreasing PCTFREECIncreasing the number of DBWN processDUsing Automatic Segment Space Management (ASSM)EIncreasing db_buffer_cache based on the V$DB_CACHE_ADVICE recommendation