OCJP(310-065)章節(jié)練習(xí)(2019.04.30)

A.0
B.1
C.2
D.3
E.4

A.public&ensp；class&ensp；MinMax<；？>；&ensp；{
B.public&ensp；class&ensp；MinMax<；？extends&ensp；Number>；&ensp；{
C.public&ensp；class&ensp；MinMax<；Nextends&ensp；Object>；&ensp；{
D.public&ensp；class&ensp；MinMax<；Nextends&ensp；Number>；&ensp；{
E.public&ensp；class&ensp；MinMax<；？extends&ensp；Object>；&ensp；{
F.public&ensp；class&ensp；MinMax<；Nextends&ensp；Integer>；&ensp；{

A.True
B.Not true
C.An exception is thrown at runtime.
D.Compilation fails because of an error at line 12.
E.Compilation fails because of an error at line 19.

A.ClassCastException
B.NullPointerException
C.NoClassDefFoundError
D.NumberFormatException
E.ArrayIndexOutOfBoundsException

A.It can be any class.
B.No class has access to base.
C.The class must belong to the geometry package.
D.The class must be a subclass of the class Hypotenuse.

A.Inheritance
B.Low cohesion
C.Tight coupling
D.High cohesion
E.Loose coupling
F.Object immutability

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；

A.public int compareTo（Object o）{/*more code here*/}
B.public int compareTo（Score other）{/*more code here*/}
C.public int compare（Score s1，Score s2）{/*more code here*/}
D.public int compare（Object o1，Object o2）{/*more code here*/}

A.When using versions of Java technology earlier than 5.0.
B.When sharing a StringBuffer among multiple threads.
C.When using the java.io class StringBufferInputStream.
D.When you plan to reuse the StringBuffer to build more than one string.

A.foo.notify（）；
B.bar.notify（）；
C.foo.notifyAll（）；
D.Thread.notify（）；
E.bar.notifyAll（）；