单选题public class ArrayTest {  public static void main(String[] args) {  float fl[], f2[];  fl = new float[10];  f2 = f1;  System.out.println(“f2[0]= “ + f2[0]);  }  }  What is the result?()AIt prints f2[0] = 0.0.BIt prints f2[0] = NaN.CAn error at line 5 c

题目
单选题
public class ArrayTest {  public static void main(String[] args) {  float fl[], f2[];  fl = new float[10];  f2 = f1;  System.out.println(“f2[0]= “ + f2[0]);  }  }  What is the result?()
A

 It prints f2[0] = 0.0.

B

 It prints f2[0] = NaN.

C

 An error at line 5 causes compile to fail.

D

 An error at line 6 causes compile to fail.

E

 An error at line 6 causes an expectation at runtime.


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更多“单选题public class ArrayTest {  public static void main(String[] args) {  float fl[], f2[];  fl = new float[10];  f2 = f1;  System.out.println(“f2[0]= “ + f2[0]);  }  }  What is the result?()A  It prints f2[0] = 0.0.B  It prints f2[0] = NaN.C  An error at li”相关问题
  • 第1题:

    以下程序的输出结果是( )。 include void main() {int f,f1,f2,i; f1=0;f2=1; printf("%

    以下程序的输出结果是( )。 include<stdio.h> void main() {int f,f1,f2,i; f1=0;f2=1; printf("%d%d",f1,f2); for(i=3;i<=5;i++) {f=-f1+f2,printf("%d",f); f2=f1;f1=f; } printf("\n"); }


    正确答案:0 1 112
    0 1 112 解析:在主函数中定义了整型变量f1和f2,并把其值赋为0和1,在屏幕上输出。然后在第一次运行for循环语句时,变量f的值等于1,把其值输出,把变量f1的值0赋给变量f2,变量f的值1赋给n,在执行第二次for循环语句时,变量f的值等于1,把此值输出。然后再把变量f1的值1赋给变量f2,变量f的值1赋给f1,在执行第三次for循环语句时,变量f的值等于2,把此值输出。所以程序运行后的结果为0 1 112。

  • 第2题:

    public class ArrayTest {  public static void main(String[] args) {  float fl[], f2[];  fl = new float[10];  f2 = f1;  System.out.println(“f2[0]= “ + f2[0]);  }  }  What is the result?()  

    • A、 It prints f2[0] = 0.0.
    • B、 It prints f2[0] = NaN.
    • C、 An error at line 5 causes compile to fail.
    • D、 An error at line 6 causes compile to fail.
    • E、 An error at line 6 causes an expectation at runtime.

    正确答案:A

  • 第3题:

    class Super {  public int i = 0;  public Super(String text) {  i = 1; }  }  public class Sub extends Super {  public Sub(String text) {  i = 2;  }   public static void main(String args[]) {  Sub sub = new Sub(“Hello”);  System.out.println(sub.i);  }  }  What is the result?()  

    • A、 0
    • B、 1
    • C、 2
    • D、 Compilation fails.

    正确答案:C

  • 第4题:

    public class X {   public static void main (Stringargs) {   int a = new int [1]   modify(a);   System.out.printIn(a[0]);   }   public static void modify (int a) {   a[0] ++;    }    }   What is the result?()  

    • A、 The program runs and prints “0”
    • B、 The program runs and prints “1”
    • C、 The program runs but aborts with an exception.
    • D、 An error “possible undefined variable” at line 4 causes compilation to fail.
    • E、 An error “possible undefined variable” at line 9 causes compilation to fail.

    正确答案:B

  • 第5题:

     public class X {   public static void main (String[]args)   {   string s = new string (“Hello”);   modify(s);   System.out.printIn(s);   }   public static void modify (String s)  {   s += “world!”;      }   }      What is the result?()    

    • A、 The program runs and prints “Hello”
    • B、 An error causes compilation to fail.
    • C、 The program runs and prints “Hello world!”
    • D、 The program runs but aborts with an exception.

    正确答案:A

  • 第6题:

     public class Test {  public static void replaceJ(string text)  {  text.replace (‘j’, ‘l’);  }  public static void main(String args[])  {  string text = new String (“java”)  replaceJ(text);  system.out.printIn(text);  }  }      What is the result?()  

    • A、 The program prints “lava”
    • B、 The program prints “java”
    • C、 An error at line 7 causes compilation to fail.
    • D、 Compilation succeeds but the program throws an exception.

    正确答案:B

  • 第7题:

    public class test {   public static void add3 (Integer i){  int val = i.intValue ( );   val += 3;   i = new Integer (val);    }     public static void main (String args [ ] )  { Integer i = new Integer (0);    add3 (i);   system.out.printIn (i.intValue ( ) );   }    }   What is the result?()

    • A、 Compilation will fail.
    • B、 The program prints “0”.
    • C、 The program prints “3”.
    • D、 Compilation will succeed but an exception will be thrown at line 3.

    正确答案:B

  • 第8题:

    单选题
    public class Test {  private static float[] f = new float[2];  public static void main(String args[]) {  System.out.println(“f[0] = “ + f[0]);  }  }   What is the result?()
    A

     f[0] = 0

    B

     f[0] = 0.0

    C

     Compilation fails.

    D

     An exception is thrown at runtime.


    正确答案: A
    解析: 暂无解析

  • 第9题:

    单选题
    public class ArrayTest {  public static void main(String[] args) {  float fl[], f2[];  fl = new float[10];  f2 = f1;  System.out.println(“f2[0]= “ + f2[0]);  }  }  What is the result?()
    A

     It prints f2[0] = 0.0.

    B

     It prints f2[0] = NaN.

    C

     An error at line 5 causes compile to fail.

    D

     An error at line 6 causes compile to fail.

    E

     An error at line 6 causes an expectation at runtime.


    正确答案: B
    解析: 暂无解析

  • 第10题:

    单选题
    1. public class ArrayTest {  2. public static void main (String[]args)  {  3. float f1[], f2[];  4. f1 = new float [10];  5. f2 = f1;  6. System.out.printIn (“f2[0]=” + f2[0]);  7.  }  8. }   What is the result?()
    A

     It prints f2[0] = 0.0

    B

     It prints f2[0] = NaN

    C

     An error at line 5 causes compile to fail.

    D

     An error at line 6 causes compile to fail.

    E

     An error at line 6 causes an exception at runtime.


    正确答案: A
    解析: 暂无解析

  • 第11题:

    单选题
    public class test (      private static int j = 0;  private static boolean methodB(int k) (  j += k;  return true;  )  public static void methodA(int  i)(  boolean b:     b = i < 10 | methodB (4);  b = i < 10 || methodB (8);  )  public static void main (String args[])(   methodA (0);  system.out.printIn(j);  )  )   What is the result?()
    A

     The program prints “0”

    B

     The program prints “4”

    C

     The program prints “8”

    D

     The program prints “12”

    E

     The code does not complete.


    正确答案: B
    解析: 暂无解析

  • 第12题:

    单选题
    public class X {   public static void main (Stringargs) {   int a = new int [1]   modify(a);   System.out.printIn(a[0]);   }   public static void modify (int a) {   a[0] ++;    }    }   What is the result?()
    A

     The program runs and prints “0”

    B

     The program runs and prints “1”

    C

     The program runs but aborts with an exception.

    D

     An error “possible undefined variable” at line 4 causes compilation to fail.

    E

     An error “possible undefined variable” at line 9 causes compilation to fail.


    正确答案: C
    解析: 暂无解析

  • 第13题:

     public class ArrayTest {   public static void main (Stringargs) {   float f1, f2;   f1 = new float [10];  f2 = f1;   System.out.printIn (“f2[0]=” + f2[0]);   }  }   What is the result?()

    • A、 It prints f2[0] = 0.0
    • B、 It prints f2[0] = NaN
    • C、 An error at line 5 causes compile to fail.
    • D、 An error at line 6 causes compile to fail.
    • E、 An error at line 6 causes an exception at runtime.

    正确答案:A

  • 第14题:

    1. public class X {  2. public static void main (String[]args)   {  3. int [] a = new int [1]  4. modify(a);  5. System.out.printIn(a[0]);  6. }  7.    8. public static void modify (int[] a)  {  9.   a[0] ++;  10.    } 11. }       What is the result?()

    • A、 The program runs and prints “0”
    • B、 The program runs and prints “1”
    • C、 The program runs but aborts with an exception.
    • D、 An error “possible undefined variable” at line 4 causes compilation to fail.
    • E、 An error “possible undefined variable” at line 9 causes compilation to fail.

    正确答案:B

  • 第15题:

    public class Test {  private static float[] f = new float[2];  public static void main(String args[]) {  System.out.println(“f[0] = “ + f[0]);  }  }   What is the result?()  

    • A、 f[0] = 0
    • B、 f[0] = 0.0
    • C、 Compilation fails.
    • D、 An exception is thrown at runtime.

    正确答案:B

  • 第16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.

    正确答案:A

  • 第17题:

    public class test (      private static int j = 0;  private static boolean methodB(int k) (  j += k;  return true;  )  public static void methodA(int  i)(  boolean b:     b = i < 10 | methodB (4);  b = i < 10 || methodB (8);  )  public static void main (String args[])(   methodA (0);  system.out.printIn(j);  )  )   What is the result?()  

    • A、 The program prints “0”
    • B、 The program prints “4”
    • C、 The program prints “8”
    • D、 The program prints “12”
    • E、 The code does not complete.

    正确答案:B

  • 第18题:

    1. public class ArrayTest {  2. public static void main (String[]args)  {  3. float f1[], f2[];  4. f1 = new float [10];  5. f2 = f1;  6. System.out.printIn (“f2[0]=” + f2[0]);  7.  }  8. }   What is the result?()  

    • A、 It prints f2[0] = 0.0
    • B、 It prints f2[0] = NaN
    • C、 An error at line 5 causes compile to fail.
    • D、 An error at line 6 causes compile to fail.
    • E、 An error at line 6 causes an exception at runtime.

    正确答案:A

  • 第19题:

    单选题
    1. public class X {  2. public static void main (String[]args)   {  3. int [] a = new int [1]  4. modify(a);  5. System.out.printIn(a[0]);  6. }  7.    8. public static void modify (int[] a)  {  9.   a[0] ++;  10.    } 11. }       What is the result?()
    A

     The program runs and prints “0”

    B

     The program runs and prints “1”

    C

     The program runs but aborts with an exception.

    D

     An error “possible undefined variable” at line 4 causes compilation to fail.

    E

     An error “possible undefined variable” at line 9 causes compilation to fail.


    正确答案: D
    解析: 暂无解析

  • 第20题:

    单选题
    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.


    正确答案: C
    解析: 暂无解析

  • 第21题:

    单选题
    class Super {  public int i = 0;  public Super(String text) {  i = 1; }  }  public class Sub extends Super {  public Sub(String text) {  i = 2;  }   public static void main(String args[]) {  Sub sub = new Sub(“Hello”);  System.out.println(sub.i);  }  }  What is the result?()
    A

     0

    B

     1

    C

     2

    D

     Compilation fails.


    正确答案: B
    解析: This code is perfectly legal and the answer is C. 

  • 第22题:

    单选题
    public class test {  public static void add3 (Integer i)  int val = i.intValue ( );  val += 3;  i = new Integer (val);  } public static void main (String args [ ] )  {  Integer  i = new Integer (0);  add3 (i);  system.out.printIn (i.intValue ( )  );  } What is the result?()
    A

     Compilation will fail.

    B

     The program prints “0”.

    C

     The program prints “3”.

    D

     Compilation will succeed but an exception will be thrown at line 3.


    正确答案: C
    解析: 暂无解析

  • 第23题:

    单选题
    public class ArrayTest {   public static void main (Stringargs) {   float f1, f2;   f1 = new float [10];  f2 = f1;   System.out.printIn (“f2[0]=” + f2[0]);   }  }   What is the result?()
    A

     It prints f2[0] = 0.0

    B

     It prints f2[0] = NaN

    C

     An error at line 5 causes compile to fail.

    D

     An error at line 6 causes compile to fail.

    E

     An error at line 6 causes an exception at runtime.


    正确答案: D
    解析: 暂无解析

  • 第24题:

    单选题
    public class Test {  public static void replaceJ(string text)  {  text.replace (‘j’, ‘l’);  }  public static void main(String args[])  {  string text = new String (“java”)  replaceJ(text);  system.out.printIn(text);  }  }      What is the result?()
    A

     The program prints “lava”

    B

     The program prints “java”

    C

     An error at line 7 causes compilation to fail.

    D

     Compilation succeeds but the program throws an exception.


    正确答案: A
    解析: 暂无解析