The Java Basic I/O API contains what types of classes and interfaces
A. Internationalization
B. RMI, JDBC, and JNDI
C. Data streams, serialization, and file system
D. Collection API and data streams
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设某二叉树的前序序列为ABC，中序序列为CBA，则该二叉树的后序序列为
A. BCA
B. CBA
C. ABC
D. CAB
When organizing the elements in a class, which order is preferred
A. Data members, methods, constructors
B. Data members, constructors, methods
Constructors, methods, data members
D. Constructors, data members, methods
E. Methods, constructors, data members
The JCheckBox and JComboBox classes belong to which package
A. java.awt
B. javax.awt
C. java.swing
D. javax.swing
Which is not a type of statement
A. Conditional statement
B. Assignment statement
C. Iteration statement
D. Propagation statement
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