网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
单选题
A marine sextant has the index arm set at zero and the reflected image of the horizon forms a continuous line with the actual image. When the sextant is rotated about the line of sight the images separate. The sextant has（）.
A
error of perpendicularity
B
side error
C
prismatic error
D
centering error
参考答案
参考解析
解析：
暂无解析
更多 “单选题A marine sextant has the index arm set at zero and the reflected image of the horizon forms a continuous line with the actual image. When the sextant is rotated about the line of sight the images separate. The sextant has（）.A error of perpendicularityB side errorC prismatic errorD centering error” 相关考题
考题
Which two initialization parameters would you set to enable Automatic Shared Memory Management?()
A. set SHARED_POOL_SIZE to zeroB. set STATISTICS_LEVEL to BASICC. set SGA_TARGET to a non-zero valueD. set DB_CACHE_SIZE to a non-zero valueE. set STATISTICS_LEVEL to TYPICAL or ALL
考题
Consider the query:Mysql＞ SET @run = 15;Mysql＞ EXPLAIN SELECT objective, stage, COUNT (stage)FROM iteminformationWHERE run=@run AND objective=’7.1’GROUP BY objective,stageORDER BY stage;The iteminformation table has the following indexes;Mysql＞ SHOW INDEXES FROM iteminformation:This query is run several times in an application with different values in the WHERE clause in a growing data set.What is the primary improvement that can be made for this scenario?（）A.Do not pass a user variable in the WHERE clause because it limits the ability of the optimizer to use indexesB.Add an index on the objective column so that is can be used in both the WHERE and GROUP BY operationsC.Drop the run_2 index because it has caused a conflict in the choice of key for this queryD.Execute the run_2 index because it has caused a conflict in the choice of key for this queryE.Add a composite index on (run,objective,stage) to allow the query to fully utilize an index
考题
A sextant having an index error that is "off the arc" has a ______.A.positive correctionB.dip errorC.negative correctionD.semidiameter error
考题
The Great Barrier Reef is included on the World Heritage list because（）Ait has the most beautiful seascape in the worldBit has the greatest number of islands in the worldCit has the most diverse and complex marine life in the worldDit has the longest coast in the world
考题
int index = 1； String test = new String； String foo = test[index]； What is the result？（）A、 Foo has the value “”B、 Foo has the value nullC、 An exception is thrownD、 The code will not compile
考题
The Great Barrier Reef is included on the World Heritage list because（）A、it has the most beautiful seascape in the worldB、it has the greatest number of islands in the worldC、it has the most diverse and complex marine life in the worldD、it has the longest coast in the world
考题
int index = 1； boolean test = new Boolean； boolean foo= test [index]； What is the result？（）A、 Foo has the value of 0.B、 Foo has the value of null.C、 Foo has the value of true.D、 Foo has the value of false.E、 An exception is thrown.F、 The code will not compile.
考题
int index = 1； int foo = new int ； int bar = foo [index]； int baz = bar + index； What is the result？（）A、 Baz has the value of 0B、 Baz has the value of 1C、 Baz has the value of 2D、 An exception is thrown.E、 The code will not compile.
考题
int index = 1； String [] test = new String[3]； String foo = test[index]； What is the result？（） A、 Foo has the value “”B、 Foo has the value nullC、 An exception is thrownD、 The code will not compile
考题
Which two initialization parameters would you set to enable Automatic Shared Memory Management？（）A、 set SHARED_POOL_SIZE to zeroB、 set STATISTICS_LEVEL to BASICC、 set SGA_TARGET to a non-zero valueD、 set DB_CACHE_SIZE to a non-zero valueE、 set STATISTICS_LEVEL to TYPICAL or ALL
考题
Initially， for the Automatic Workload Repository （AWR） statistics，the retention period is set to 7 days， the collection interval is set to 30 minutes and the collection level is set to Typical in your production database. You have been using the Memory Advisor for the last three months to generate recommendations for tuning memory components. However，when you observe the Memory Advisor on a Friday，you find that the statistics are available only for two days， Thursday and Friday，of that week. What would have caused the statistics to be removed？（）A、On Wednesday， the statistics have been purged.B、On Wednesday， the retention period has been set to zero.C、On Wednesday， the collection interval has been set to zero.D、On Wednesday， the collection level has been changed to All.E、On Wednesday， the retention period has been set to one day.F、On Wednesday， the retention period has been set to two daysG、On Wednesday, the collection level has been changed to Typical.H、On Wednesday, the collection interval has been set to 1440 minutes.
考题
单选题int index = 1； int foo = new int ； int bar = foo [index]； int baz = bar + index； What is the result？（）A
Baz has the value of 0B
Baz has the value of 1C
Baz has the value of 2D
An exception is thrown.E
The code will not compile.
考题
单选题Users in your PROD database complain about the slow response of the transactions. While investigating the reason， you find that the transactions are waiting for the undo segments to be available， and undo retention has been set to zero. What would you do to overcome this problem？（）A
increase the undo retentionB
create more undo segmentsC
create another undo tablespaceD
increase the size of the undo tablespace
考题
单选题int index = 1； int [] foo = new int [3]； int bar = foo [index]； int baz = bar + index； What is the result？（）A
Baz has the value of 0B
Baz has the value of 1C
Baz has the value of 2D
An exception is thrown.E
The code will not compile.
考题
单选题int index = 1； boolean test = new Boolean； boolean foo= test [index]； What is the result？（）A
Foo has the value of 0.B
Foo has the value of null.C
Foo has the value of true.D
Foo has the value of false.E
An exception is thrown.F
The code will not compile.
考题
单选题You work in a company which uses SQL Server 2008. You are the administrator of the company database. Now you are in charge of a SQL Server 2008 instance. There is a database named named Dworks in the instance. The Dworks table has a table named BillDetails which has a clustered primary key named BillId on the BillId column. The BillDetails table has a single XML column named GoodsDetails. The XML column has an XML index and XML data are stored in this XML column. A new column named GoodsID is added to the BillDetails table. GoodsID must be included in the primary key. So what action should you perform to achieve this goal？（）A
You should drop the XML index on the table. Modify the primary key. Recreate the XML index B
You should alter the XML index and set the ALLOW_ROW_LOCKS = OFF option. Alter the primary key and set the ALLOW_ROW_LOCKS = ON option. C
You should move the XML data to a temporary table. Clear the XML data from the original table by setting the GoodsDetails column to NULL. Modify the primary key. Repopulate the ProductSpecs column. D
You should disable the XML index on the GoodsDetails column. Modify the primary key.Enable the XML index on the ProductSpecs column.
考题
单选题int index = 1； String test = new String； String foo = test[index]； What is the result？（）A
Foo has the value “”B
Foo has the value nullC
An exception is thrownD
The code will not compile
考题
单选题int index = 1； String [] test = new String[3]； String foo = test[index]； What is the result？（）A
Foo has the value “”B
Foo has the value nullC
An exception is thrownD
The code will not compile
考题
单选题Initially， for the Automatic Workload Repository （AWR） statistics，the retention period is set to 7 days， the collection interval is set to 30 minutes and the collection level is set to Typical in your production database. You have been using the Memory Advisor for the last three months to generate recommendations for tuning memory components. However，when you observe the Memory Advisor on a Friday，you find that the statistics are available only for two days， Thursday and Friday，of that week. What would have caused the statistics to be removed？（）A
On Wednesday， the statistics have been purged.B
On Wednesday， the retention period has been set to zero.C
On Wednesday， the collection interval has been set to zero.D
On Wednesday， the collection level has been changed to All.E
On Wednesday， the retention period has been set to one day.F
On Wednesday， the retention period has been set to two daysG
On Wednesday, the collection level has been changed to Typical.H
On Wednesday, the collection interval has been set to 1440 minutes.
考题
单选题A sextant having an index error that is off the arc has a（）.A
positive correctionB
dip errorC
negative correctionD
semidiameter error
考题
单选题The Great Barrier Reef is included on the World Heritage list because（）A
it has the most beautiful seascape in the worldB
it has the greatest number of islands in the worldC
it has the most diverse and complex marine life in the worldD
it has the longest coast in the world
热门标签
最新试卷
