多选题Given the following class, which statements can be inserted at position 1 without causing the code to fail compilation?()   public class Q6db8 {   int a;   int b = 0;   static int c;   public void m() {   int d;   int e = 0;   // Position 1   }   }Aa++

题目
多选题
Given the following class, which statements can be inserted at position 1 without causing the code to fail compilation?()   public class Q6db8 {   int a;   int b = 0;   static int c;   public void m() {   int d;   int e = 0;   // Position 1   }   }
A

a++;

B

b++;

C

c++;

D

d++;

E

e++;


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更多“多选题Given the following class, which statements can be inserted at position 1 without causing the code to fail compilation?()   public class Q6db8 {   int a;   int b = 0;   static int c;   public void m() {   int d;   int e = 0;   // Position 1   }   }Aa++”相关问题
  • 第1题:

    以下程序的输出结果为:

    public class test {

    public static void main(String args[]) {

    int s=0;

    for (int k=0;k<=10;k++)

    s+=method(2,k)-1;

    System.out.println(s);

    }

    public static int method(int n,int m) {

    if (m==0)

    return 1;

    else

    return n*method(n,m-1、;

    }

    }

    A. 2048

    B. 1024

    C. 2036

    D.2000


    正确答案:C

  • 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:

    Which statements can be inserted at the indicated position in the following code to make the program write 1 on the standard output when run?()  public class Q4a39 {  int a = 1;   int b = 1;   int c = 1;   class Inner {   int a = 2;  int get() {   int c = 3;   // insert statement here  return c;   }   }  Q4a39() {   Inner i = new Inner();   System.out.println(i.get());  }   public static void main(String args[]) {   new Q4a39();   }   }  

    • A、c = b;
    • B、c = this.a;
    • C、c = this.b;
    • D、c = Q4a39.this.a;
    • E、c = c;

    正确答案:A,D

  • 第4题:

    Which line contains a constructor in this class definition?()   public class Counter { // (1)   int current, step;   public Counter(int startValue, int stepValue) { // (2)   set(startValue);   setStepValue(stepValue);  }   public int get() { return current; } // (3)   public void set(int value) { current = value; } // (4)   public void setStepValue(int stepValue) { step = stepValue; } // (5)  }  

    • A、Code marked with (1) is a constructor
    • B、Code marked with (2) is a constructor
    • C、Code marked with (3) is a constructor
    • D、Code marked with (4) is a constructor
    • E、Code marked with (5) is a Constructor

    正确答案:B

  • 第5题:

    10. interface Foo { int bar(); }  11. public class Sprite {  12. public int fubar( Foo foo) { return foo.bar(); }  13. public void testFoo() {  14. fubar(  15. // insert code here  16.);  17. }  18. }  Which code, inserted at line 15, allows the class Sprite to compile?() 

    • A、 Foo { public int bar() { return 1; } }
    • B、 new Foo { public int bar() { return 1; } }
    • C、 newFoo() { public int bar(){return 1; } }
    • D、 new class Foo { public int bar() { return 1; } }

    正确答案:C

  • 第6题:

    Given the following class, which statements can be inserted at position 1 without causing the code to fail compilation?()   public class Q6db8 {   int a;   int b = 0;   static int c;   public void m() {   int d;   int e = 0;   // Position 1   }   } 

    • A、a++;
    • B、b++;
    • C、c++;
    • D、d++;
    • E、e++;

    正确答案:A,B,C,E

  • 第7题:

    Given the following code:     public class Person{     int arr[] = new int[10];  public static void main(String a[]) {     System.out.println(arr[1]);     }     }  Which statement is correct?() 

    • A、 When compilation some error will occur.
    • B、 It is correct when compilation but will cause error when running.
    • C、 The output is zero.
    • D、 The output is null.

    正确答案:A

  • 第8题:

    class A {   public int getNumber(int a) {   return a + 1;   }   }    class B extends A {   public int getNumber (int a) {   return a + 2   }    public static void main (String args) {   A a = new B();   System.out.printIn(a.getNumber(0));   }   }   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9题:

    多选题
    Given the following code, which method declarations, when inserted at the indicated position, will not cause the program to fail compilation?()   public class Qdd1f {   public long sum(long a, long b) {  return a + b;  }   // insert new method declaration here  }
    A

    public int sum(int a, int b) { return a + b; }

    B

    public int sum(long a, long b) { return 0; }

    C

    abstract int sum();

    D

    private long sum(long a, long b) { return a + b; }

    E

    public long sum(long a, int b) { return a + b; }


    正确答案: B,C
    解析: 暂无解析

  • 第10题:

    多选题
    Which statements can be inserted at the indicated position in the following code to make the program write 1 on the standard output when run?()  public class Q4a39 {  int a = 1;   int b = 1;   int c = 1;   class Inner {   int a = 2;  int get() {   int c = 3;   // insert statement here  return c;   }   }  Q4a39() {   Inner i = new Inner();   System.out.println(i.get());  }   public static void main(String args[]) {   new Q4a39();   }   }
    A

    c = b;

    B

    c = this.a;

    C

    c = this.b;

    D

    c = Q4a39.this.a;

    E

    c = c;


    正确答案: A,C
    解析: 暂无解析

  • 第11题:

    单选题
    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: C
    解析: 暂无解析

  • 第12题:

    多选题
    public abstract class Shape {  private int x;  private int y;  public abstract void draw();  public void setAnchor(int x, int y) {  this.x = x;  this.y = y;  }  }  Which two classes use the Shape class correctly?()
    A

    public class Circle implements Shape { private int radius; }

    B

    public abstract class Circle extends Shape { private int radius; }

    C

    public class Circle extends Shape { private int radius; public void draw(); }

    D

    public abstract class Circle implements Shape { private int radius; public void draw(); }

    E

    public class Circle extends Shape { private int radius;public void draw() {/* code here */} }

    F

    public abstract class Circle implements Shape { private int radius;public void draw() { / code here */ } }


    正确答案: B,F
    解析: 暂无解析

  • 第13题:

    class A {  protected int method1(int a, int b) { return 0; }  }  Which two are valid in a class that extends class A?() 

    • A、 public int method1(int a, int b) { return 0; }
    • B、 private int method1(int a, int b) { return 0; }
    • C、 private int method1(int a, long b) { return 0; }
    • D、 public short method1(int a, int b) { return 0: }
    • E、 static protected int method1(int a, int b) { return 0; }

    正确答案:A,C

  • 第14题:

    1. public class Target {  2. private int i = 0;  3. public int addOne() {  4. return ++i;  5. }  6. }  And:  1. public class Client {  2. public static void main(String[] args) {  3. System.out.println(new Target().addOne());  4. }  5. }  Which change can you make to Target without affecting Client?() 

    • A、 Line 4 of class Target can be changed to return i++;
    • B、 Line 2 of class Target can be changed to private int i = 1;
    • C、 Line 3 of class Target can be changed to private int addOne() {
    • D、 Line 2 of class Target can be changed to private Integer i = 0;

    正确答案:D

  • 第15题:

    What will be the result of attempting to compile and run the following code?()   public class Q6b0c {   public static void main(String args[]) {  int i = 4;  float f = 4.3;   double d = 1.8;   int c = 0;   if (i == f) c++;   if (((int) (f + d)) == ((int) f + (int) d))  c += 2;   System.out.println(c);   }   }  

    • A、The code will fail to compile.
    • B、0 will be written to the standard output.
    • C、1 will be written to the standard output.
    • D、2 will be written to the standard output.
    • E、3 will be written to the standard output.

    正确答案:A

  • 第16题:

    Given the following code, which method declarations, when inserted at the indicated position, will not cause the program to fail compilation?()   public class Qdd1f {   public long sum(long a, long b) {  return a + b;  }   // insert new method declaration here  }  

    • A、public int sum(int a, int b) { return a + b; }
    • B、public int sum(long a, long b) { return 0; }
    • C、abstract int sum();
    • D、private long sum(long a, long b) { return a + b; }
    • E、public long sum(long a, int b) { return a + b; }

    正确答案:A,E

  • 第17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18题:

    public class test(    public int aMethod()[   static int i=0;   i++;   return I;   )    public static void main (String args){   test test = new test();    test.aMethod();   int j = test.aMethod();   System.out.printIn(j);   ]  }   What is the result?()

    • A、 Compilation will fail.
    • B、 Compilation will succeed and the program will print “0”
    • C、 Compilation will succeed and the program will print “1”
    • D、 Compilation will succeed and the program will print “2”

    正确答案:D

  • 第19题:

    Given the following code:     public class Person{ static int arr[] = new int[10];  public static void main(String a[]) {     System.out.println(arr[1];)     }     }  Which statement is correct?()   

    • A、 When compilation some error will occur.
    • B、 It is correct when compilation but will cause error when running.
    • C、 The output is zero.
    • D、 The output is null.

    正确答案:C

  • 第20题:

    public abstract class Shape {  private int x;  private int y;  public abstract void draw();  public void setAnchor(int x, int y) {  this.x = x;  this.y = y;  }  }  Which two classes use the Shape class correctly?()

    • A、 public class Circle implements Shape { private int radius; }
    • B、 public abstract class Circle extends Shape { private int radius; }
    • C、 public class Circle extends Shape { private int radius; public void draw(); }
    • D、 public abstract class Circle implements Shape { private int radius; public void draw(); }
    • E、 public class Circle extends Shape { private int radius;public void draw() {/* code here */} }
    • F、 public abstract class Circle implements Shape { private int radius;public void draw() { / code here */ } }

    正确答案:B,E

  • 第21题:

    多选题
    Given the following class, which statements can be inserted at position 1 without causing the code to fail compilation?()   public class Q6db8 {   int a;   int b = 0;   static int c;   public void m() {   int d;   int e = 0;   // Position 1   }   }
    A

    a++;

    B

    b++;

    C

    c++;

    D

    d++;

    E

    e++;


    正确答案: A,D
    解析: 暂无解析

  • 第22题:

    单选题
    Given the following code:     public class Person{ static int arr[] = new int[10];  public static void main(String a[]) {     System.out.println(arr[1];)     }     }  Which statement is correct?()
    A

     When compilation some error will occur.

    B

     It is correct when compilation but will cause error when running.

    C

     The output is zero.

    D

     The output is null.


    正确答案: C
    解析:  int型数组是类对象,它在类被加载时完成初始化,在前面题目中已经有叙述,由于是原始数据类型int,其初始值为0。

  • 第23题:

    单选题
    Given the following code:     public class Person{     int arr[] = new int[10];  public static void main(String a[]) {     System.out.println(arr[1]);     }     }  Which statement is correct?()
    A

     When compilation some error will occur.

    B

     It is correct when compilation but will cause error when running.

    C

     The output is zero.

    D

     The output is null.


    正确答案: D
    解析: 实例变量在类的一个实例构造时完成初始化,而且在类的静态方法中不能直接访问类的非静态成员而只能访问类成员(像上题中一样),类的普通方法可以访问类的所有成员和方法,而静态方法只能访问类的静态成员和方法,因为静态方法属于类,而普通方法及成员变量属于类的实例,类方法(静态方法)不能使用属于某个不确定的类的实例的方法和变量,在静态方法里面没有隐含的this,而普通方法有。

  • 第24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