true -（）_众课帮

（） is true.

A . ISSA stores are numbered in six digits B . IMPA stores are numbered in six digits C . IMPA stores are numbered in seven digits D . both ISSA and IMPA stores are numbered in unique six digit

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Which four statements are true？（）

A . Has-a relationships should never be encapsulated. B . Has-a relationships should be implemented using inheritance. C . Has-a relationships can be implemented using instance variables. D . Is-a relationships can be implemented using the extends keyword. E . Is-a relationships can be implemented using the implements keyword. F . An array or a collection can be used to implement a one-to-many has-a relationship.

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Which four are true？（）

A . Has-a relationships should never be encapsulated. B . Has-a relationships should be implemented using inheritance. C . Has-a relationships can be implemented using instance variables. D . Is-a relationships can be implemented using the extends keyword. E . Is-a relationships can be implemented using the implements keyword. F . An array or a collection can be used to implement a one-to-many has-a relationship. G . The relationship between Movie and Actress is an example of an is-a relationship.

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Which statements are true， given the code new FileOutputStream（"data"， true） for creating an object of class FileOutputStream？（）

A . FileOutputStream has no constructors matching the given arguments. B . An IOExeception will be thrown if a file named "data" already exists. C . An IOExeception will be thrown if a file named "data" does not already exist. D . If a file named "data" exists， its contents will be reset and overwritten. E . If a file named "data" exists， output will be appended to its current contents.

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What is true about sequences? （）

A . Once created, a sequence belongs to a specific schema. B . Once created, a sequence is linked to a specific table. C . Once created, a sequence is automatically available to all users. D . Only the DBA can control which sequence is used by a certain table. E . Once created, a sequence is automatically used in all INSERT and UPDATE statements.

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真两性畸形(true hermaphroditism)

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设a = True ，b = True ，c = False，以下表达式值为False的是（）

A . a or b or c B . （not a or b ）and（ b or c ） C . False or not a and b or not c D . not a and not b and （12 in [1..10] ）

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Image组件可通过设置其（）属性为True使之根据图像自动调整大小；而通过设置其（）属性为True，使其加载的图片能自动调整大小以适应Image。

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在Excel中，公式“=Sum（“3”，2，True）”返回值为6，因为“3”被转换成数字3，而逻辑值True被转换成数字1。

A . 正确 B . 错误

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已知如下代码：booleanm=true；if（m=false）System.out.println（"False"）；elseSystem.out.println（"True"）；执行结果是（）

A . False B . True C . None D . 出错

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Examine the following command; ALTER SYSTEM SET enable_ddl_logging = TRUE; Which statement is true?（）

A . Only the data definition language (DDL) commands that resulted in errors are logged in the alert log file. B . All DDL commands are logged in the alert log file. C . All DDL commands are logged in a different log file that contains DDL statements and their execution dates. D . Only DDL commands that resulted in the creation of new segments are logged. E . All DDL commands are logged in XML format in the alert directory under the Automatic Diagnostic Repository (ADR) home.

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设逻辑变量X为True，Y、Z均为False，以下逻辑表达式值为True的是（）。

A . XOR（YANDZ） B . （XANDY）ORZ C . （NOTX）ORYORZ D . XAND（YORZ）

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class Test2{ public static void main（String [] args）{ boolean x=true； boolean y=false； short z=42； if（（x==true）&&y=true））z++； if（（y==true++z=44））z++； System.out.println（“z=”+z）； } } 结果是什么？（）

A . z=42 B . z=43 C . z=44 D . z=45 E . 编译失败 F . 运行的时候有异常抛出

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int x=9; if(x>8 && x<10) System.out.println(true); 以上语句运行结果显示true 。

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int x=9; if(x>8 && x<10) System.out.println('true'); 以上语句运行结果显示true 。

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True or false. T for true and F for false.1.Tennyson’s In Memoriam is dedicated to his father. ( )

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______ is accepted as true is relatively， and not absolutely， true.

A. It B. That C. What D. That it

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逻辑运算符&&的操作数都是true时,结果为true,否则为false（）