Given：
What is the result？（）
A.Compilation fails.
B.Cannot add Toppings
C.The code runs with no output.
D.A NullPointerException is thrown in Line 4.
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A team of programmers is involved in reviewing a proposed design for a new utility class. After some discussion， they realize that the current design allows other classes to access methods in the utility class that should be accessible only to methods within the utility class itself.
What design issue has the team discovered？（）
A.Tight coupling
B.Low cohesion
C.High cohesion
D.Loose coupling
E.Weak encapsulation
F.Strong encapsulation
Given：
Which two code fragments， inserted independently at line 13， will compile？（）
A.super（name， baseSalary）；
B.this.commission = commission；
C.super（）； this.commission = commission；
D.this.commission = commission； super（）；
E.super（name， baseSalary）； this.commission = commission；
Given：
What are four valid examples of polymorphic method calls？（）
A.x.a2（）；
B.z.a2（）；
C.z.c1（）；
D.z.a1（）；
E.y.c1（）；
F.x.a1（）；
Given:
What is the result？（）
A.peep
B.bark
C.meow
D.Compilation fails.
E.An exception is thrown at runtime.
Given：
Which change can you make to Target without affecting Client？（）
A.Line 4 of class Target can be changed to return i++；
B.Line 2 of class Target can be changed to private int i = 1；
C.Line 3 of class Target can be changed to private int addOne（）{
D.Line 2 of class Target can be changed to private Integer i = 0；
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.assert value == null；
B.assert value != null， "value is null"；
C.if （value == null） { throw new AssertionException（"value is null"）； }
D.if （value == null） { throw new IllegalArgumentException（"value is null"）； }
A team of programmers is involved in reviewing a proposed design for a new utility class. After some discussion， they realize that the current design allows other classes to access methods in the utility class that should be accessible only to methods within the utility class itself.
What design issue has the team discovered？（）
A.Tight coupling
B.Low cohesion
C.High cohesion
D.Loose coupling
E.Weak encapsulation
Given：
11.double input = 314159.26；
12.NumberFormat nf = NumberFormat.getInstance（Locale.ITALIAN）；
13.String b；
14.//insert code here
Which code， inserted at line 14， sets the value of b to 314.159，26？（）
A.b = nf.parse（ input ）；
B.b = nf.format（ input ）；
C.b = nf.equals（ input ）；
D.b = nf.parseObject（ input ）；
Given：
If an instance of class Beagle is created，then Serialized，then deSerialized， what is the result？（）
A.ad
B.ada
C.add
D.adad
Given：
11.String test = "This is a test"；
12.String[] tokens = test.split（"\s"）；
13.System.out.println（tokens.length）；
What is the result？（）
A.0
B.1
C.4
D.Compilation fails.
最新试题
A team of programmers is involved in reviewing a proposed design for a new utility class. After some discussion， they realize that the current design allows other classes to access methods in the utility class that should be accessible only to methods within the utility class itself.What design issue has the team discovered？（）
Given：What is the result？（）
A programmer has an algorithm that requires a java.util.List that provides an efficient implementation of add（0， object）， but does NOT need to support quick random access.What supports these requirements？（）
Click the Exhibit button.Which graph represents the correct directory structure for a JAR file from which those classes can be used by the compiler and JVM？（）
Given：Which line of code marks the earliest point that an object referenced by intObj becomes a candidate for garbage collection？（）
Click the Exhibit buttonWhich two statements are true if a NullPointerException is thrown on line 3 of class C？（）
Given：What is the result？（）
Click the Exhibit button.What two must the programmer do to correct the compilation errors？（）
Given：Which code fragment， inserted at the end of line 12， produces the output p is 420？（）
Given:What is the result？（）