public class X {  public static void main (String[] args)  {  byte b = 127;  byte c = 126;  byte d = b + c;  }  }   Which statement is true?()  A、 Compilation succeeds and d takes the value 253.B、 Line 5 contains an error that prevents compilation.C、 Line

题目

public class X {  public static void main (String[] args)  {  byte b = 127;  byte c = 126;  byte d = b + c;  }  }   Which statement is true?()  

  • A、 Compilation succeeds and d takes the value 253.
  • B、 Line 5 contains an error that prevents compilation.
  • C、 Line 5 throws an exception indicating “Out of range”
  • D、 Line 3 and 4 contain error that prevent compilation.
  • E、 The compilation succeeds and d takes the value of 1.
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相似问题和答案

第1题:

1. class A {  2. public int getNumber(int a) {  3.     return a + 1;  4. }  5. }  6.    7. class B extends A {  8. public int getNumber (int a) {  9. return a + 2  10. }  11.    12. public static void main (String args[])  {  13. A a = new B();  14. System.out.printIn(a.getNumber(0));  15.    } 16. }     What is the result?()  

  • A、 Compilation succeeds and 1 is printed.
  • B、 Compilation succeeds and 2 is printed.
  • C、 An error at line 8 causes compilation to fail.
  • D、 An error at line 13 causes compilation to fail.
  • E、 An error at line 14 causes compilation to fail.

正确答案:B

第2题:

public class test (    public static void main (String args) {    int i = 0xFFFFFFF1;  int j = ~i;   }    )   What is the decimal value of j at line 5?()

  • A、 0
  • B、 1
  • C、 14
  • D、 –15
  • E、 An error at line 3 causes compilation to fail.
  • F、 An error at line 4 causes compilation to fail.

正确答案:D

第3题:

执行下列代码段之后,变量b的值为______。 public class ex40 { public static void main(String[] args) { byte x=5; byte y=5; byte c=10; boolean b; b-c<x<<y; System.out.println (b); } }

A.1

B.0

C.false

D.true


正确答案:D

第4题:

class A {   public byte getNumber () {   return 1;   }   }   class B extends A {   public short getNumber() {   return 2;   }    public static void main (String args) {   B b = new B ();    System.out.printIn(b.getNumber())  }   }   What is the result?()  

  • A、 Compilation succeeds and 1 is printed.
  • B、 Compilation succeeds and 2 is printed.
  • C、 An error at line 8 causes compilation to fail.
  • D、 An error at line 14 causes compilation to fail.
  • E、 Compilation succeeds but an exception is thrown at line 14.

正确答案:C

第5题:

package test1;  public class Test1 {  static int x = 42;  }  package test2;  public class Test2 extends test1.Test1 {  public static void main(String[] args) { System.out.println(“x = “ + x);  }  }  What is the result?() 

  • A、 x = 0
  • B、 x = 42
  • C、 Compilation fails because of an error in line 2 of class Test2.
  • D、 Compilation fails because of an error in line 3 of class Test1.
  • E、 Compilation fails because of an error in line 4 of class Test2.

正确答案:C

第6题:

class A {   public String toString () {   return “4”;   }   }   class B extends A {   8. public String toString () {   return super.toString() + “3”;   }   }   public class Test {   public static void main(Stringargs) {   System.out.printIn(new B());   }   }   What is the result?()  

  • A、 Compilation succeeds and 4 is printed.
  • B、 Compilation succeeds and 43 is printed.
  • C、 An error on line 9 causes compilation to fail.
  • D、 An error on line 14 causes compilation to fail.
  • E、 Compilation succeeds but an exception is thrown at line 9.

正确答案:B

第7题:

1. public class Test {   2. public static void main (String args) {   3. unsigned byte b = 0;   4. b--;   5.   6. }   7. }   What is the value of b at line 5?()  

  • A、 -1
  • B、 255
  • C、 127
  • D、 Compilation will fail.
  • E、 Compilation will succeed but the program will throw an exception at line 4.

正确答案:D

第8题:

下列代码执行之后,输出的结果为______。 public class ex34 { public static void main(String[] args) { byte a=-128; byte b=(a|127)>0?(byte)(~a>>128:(byte)(~a<<128); System. out. Println(b); } }

A.-128

B.128

C.127

D.-127


正确答案:C

第9题:

1. class A {  2. public byte getNumber ()  {  3.   return 1;  4.   }  5. }  6.    7. class B extends A {  8. public short getNumber()  {  9.  return 2;  10. }  11.    12. public static void main (String args[]) {   13.    B  b = new B ();  14.      System.out.printIn(b.getNumber())     15.   }  16. }    What is the result?()  

  • A、 Compilation succeeds and 1 is printed.
  • B、 Compilation succeeds and 2 is printed.
  • C、 An error at line 8 causes compilation to fail.
  • D、 An error at line 14 causes compilation to fail.
  • E、 Compilation succeeds but an exception is thrown at line 14.

正确答案:C

第10题:

package foo;  import java.util.Vector; private class MyVector extends Vector {  int i = 1;  public MyVector() {  i = 2; } }  public class MyNewVector extends MyVector {  public MyNewVector() {  i = 4;  }  public static void main(String args[]) {  MyVector v = new MyNewVector();  }  }  What is the result?()

  • A、 Compilation succeeds.
  • B、 Compilation fails because of an error at line 5.
  • C、 Compilation fails because of an error at line 6.
  • D、 Compilation fails because of an error at line 14.
  • E、 Compilation fails because of an error at line 17.

正确答案:B

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