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单选题
Oracle9i extends the cursor sharing functionality with the new value of SIMILAR for the CURSOR_SHARING parameter. With CURSOR_SHARING = SIMILAR， cursors are shared for safe literals only. What is meant by ‘safe literals only’？（）
A
No literal value is substituted for a shared cursor.
B
Different execution plans are generated for substituted literal values.
C
The substitution of a literal value will produce different execution plans.
D
The substitution of any literal value will produce exactly the same execution plan.
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Oracle9i extends the cursor sharing functionality with the new value of SIMILAR for the CURSOR_SHARING parameter. With CURSOR_SHARING = SIMILAR， cursors are shared for safe literals only. What is meant by ‘safe literals only’？（） A、No literal value is substituted for a shared cursor. B、Different execution plans are generated for substituted literal values. C、The substitution of a literal value will produce different execution plans. D、The substitution of any literal value will produce exactly the same execution plan.
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Given： 1.package test； 2. 3.class Target { 4.public String name = "hello"；5.} What can directly access and change the value of the variable name？（）A、any classB、only the Target classC、any class in the test packageD、any class that extends Target
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单选题Given a method that must ensure that its parameter is not null： 11. public void someMethod（Object value） { 12. // check for null value ... 20. System.out.println（value.getClass（））； 21. } What inserted at line 12， is the appropriate way to handle a null value？（）A
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单选题String foo = “blue”； Boolean[]bar = new Boolean [1]； if （bar[0]） { foo = “green”； } What is the result？ （）A
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Foo has the value of null.C
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单选题package test； class Target { public String name = “hello”； } What can directly access and change the value of the variable name？（）A
any classB
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单选题11. public void someMethod（Object value） { 12. // check for null value .... 20. System.out.println（value.getClass（））； 21. } What， inserted at line 12， is the appropriate way to handle a null value？（）A
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