单项选择题Which code determines the int value foo closest to a double value bar?()  

A. Int foo = (int) Math.max(bar);
B. Int foo = (int) Math.min(bar);
C. Int foo = (int) Math.abs(bar);
D. Int foo = (int) Math.ceil(bar);
E. Int foo = (int) Math.floor(bar);
F. Int foo = (int) Math.round(bar);


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1.单项选择题

public class Test {  
public static void main (String args) { 
string foo = “blue”; 
string bar = foo;  
foo = “green”;  
System.out.printIn(bar);  
}  
}  
What is the result?()  

A. An exception is thrown.
B. The code will not compile.
C. The program prints “null”
D. The program prints “blue”
E. The program prints “green”

2.单项选择题Which can be used to decode charS for output?()  

A. Java.io.InputStream.
B. Java.io.EncodedReader.
C. Java.io.InputStreamReader.
D. Java.io.InputStreamWriter.
E. Java.io.BufferedInputStream.

3.单项选择题Which constructs a DataOutputStream?()  

A. New dataInputStream(“in.txt”);
B. New dataInputStream(new file(“in.txt”));
C. New dataInputStream(new writer(“in.txt”));
D. New dataInputStream(new FileWriter(“in.txt”));
E. New dataInputStream(new InputStream(“in.txt”));
F. New dataInputStream(new FileInputStream(“in.txt”));

4.单项选择题

public class Foo implements Runnable ( 
public void run (Thread t) {  
system.out.printIn(“Running.”);  
}  
public static void main (String args) {  
new thread (new Foo()).start();  
}  
)  
What is the result?()  

A. An exception is thrown.
B. The program exists without printing anything.
C. An error at line 1 causes compilation to fail.
D. An error at line 6 causes the compilation to fail.
E. “Running” is printed and the program exits.

5.多项选择题Which two can directly cause a thread to stop executing?() 

A. Exiting from a synchronized block.
B. Calling the wait method on an object.
C. Calling the notify method on an object.
D. Calling the notifyAll method on an object.
E. Calling the setPriority method on a thread object.

6.单项选择题

public class ForBar {  
public static void main(String args) {  
int i = 0, j = 5;  
tp: for (;;) {  
i ++;  
for(;;)  
if(i > --j) break tp;  
}  
system.out.printIn(“i = ” + i + “, j = “+ j);  
}  
}  
What is the result? () 

A. The program runs and prints “i=1, j=0”
B. The program runs and prints “i=1, j=4”
C. The program runs and prints “i=3, j=4”
D. The program runs and prints “i=3, j=0”
E. An error at line 4 causes compilation to fail.
F. An error at line 7 causes compilation to fail.

7.多项选择题Which four types of objects can be thrown using the throw statement?()

A. Error
B. Event
C. Object
D. Exception
E. Throwable
F. RuntimeException

10.多项选择题Which two create an instance of an array?() 

A. int ia = new int [15];
B. float fa = new float [20];
C. char ca = “Some String”;
D. Object oa = new float[20];
E. Int ia = (4, 5, 6) (1, 2, 3)