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Given: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.new Foo() { public int bar() { return 1; }

D.new class Foo { public int bar() { return 1; }


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更多 “ Given: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.new Foo() { public int bar() { return 1; }D.new class Foo { public int bar() { return 1; } ” 相关考题
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考题 Given: 3.public class MyTagHandler extends TagSupport { 4.public int doStartTag() { 5.// insert code here 6.// return an int 7.} 8.// more code here ... 18.} There is a single attribute foo in the session scope. Which three code fragments,inserted independently atline 5,return the value of the attribute?()A、Object o = pageContext.getAttribute("foo");B、Object o = pageContext.findAttribute("foo");C、Object o = pageContext.getAttribute("foo",PageContext.SESSION_SCOPE);D、HttpSession s = pageContext.getSession();Object o = s.getAttribute("foo");

考题 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”

考题 10. public class Bar {  11.static void foo(int...x) {  12. // insert code here  13. }  14. }  Which two code fragments, inserted independently at line 12, will allow the class to compile?()A、 foreach(x) System.out.println(z);B、 for(int z : x) System.out.println(z);C、 while( x.hasNext()) System.out.println( x.next());D、 for( int i=0; i x.length; i++ ) System.out.println(x[i]);

考题 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 constructorB、Code marked with (2) is a constructorC、Code marked with (3) is a constructorD、Code marked with (4) is a constructorE、Code marked with (5) is a Constructor

考题 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; }

考题 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; } }

考题 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);

考题 class One {   public One foo() { return this; }  }  class Two extends One {  public One foo() { return this; }  }  class Three extends Two {   // insert method here  }  Which two methods, inserted individually, correctly complete the Three class?()A、 public void foo() { }B、 public int foo() { return 3; }C、 public Two foo() { return this; }D、 public One foo() { return this; }E、 public Object foo() { return this; }

考题 public class Score implements Comparable {  private int wins, losses;  public Score(int w, int 1) { wins = w; losses = 1; }  public int getWins() { return wins; }  public int getLosses() { return losses; }  public String toString() {  return ““ + wins + “,“ + losses + “”; }  // insert code here  }  Which method will complete this class?() A、 public int compareTo(Object o) {/*mode code here*/}B、 public int compareTo(Score other) {/*more code here*/}C、 public int compare(Score s1,Score s2){/*more code here*/}D、 public int compare(Object o1,Object o2){/*more code here*/}

考题 Given the JSP code: % request.setAttribute("foo", "bar"); %and the Classic tag handler code: 5. public int doStartTag() throws JspException { 6. // insert code here 7. // return int 8. } Assume there are no other "foo" attributes in the web application. Which invocation on the pageContextobject,inserted at line 6,assigns "bar" to the variable x?()A、String x = (String) pageContext.getAttribute("foo")B、String x = (String) pageContext.getRequestScope("foo")C、It is NOT possible to access the pageContext object from within doStartTagD、String x = (String) pageContext.getRequest().getAttribute("foo")E、String x = (String) pageContext.getAttribute("foo", PageContext.ANY_SCOPE)

考题 10. public class Foo implements java.io.Serializable {  11. private int x;  12. public int getX() { return x; }  12.publicFoo(int x){this.x=x; }  13. private void writeObject( ObjectOutputStream s)  14. throws IOException {  15. // insert code here  16. }  17. }  Which code fragment, inserted at line 15, will allow Foo objects to be correctly serialized and deserialized?() A、 s.writeInt(x);B、 s.serialize(x);C、 s.writeObject(x);D、 s.defaultWriteObject();

考题 int index = 1;   int foo = new int ;   int bar = foo [index];   int baz = bar + index;   What is the result?()A、 Baz has the value of 0B、 Baz has the value of 1C、 Baz has the value of 2D、 An exception is thrown.E、 The code will not compile.

考题 10. interface Foo {  11. int bar();  12. }  13.  14. public class Beta {  15.  16. class A implements Foo {  17. public int bar() { return 1; }  18. }  19.  20. public int fubar( Foo foo) { return foo.bar(); }  21.  22. public void testFoo() {  23.  24. class A implements Foo {  25. public int bar() { return 2; }  26. }  27.  28. System.out.println( fubar( new A())); 29. }  30.  31. public static void main( String[] argv) {  32. new Beta().testFoo();  33. }  34. }  Which three statements are true?()A、 Compilation fails.B、 The code compiles and the output is 2.C、 If lines 16, 17 and 18 were removed, compilation would fail.D、 If lines 24, 25 and 26 were removed, compilation would fail.E、 If lines 16, 17 and 18 were removed, the code would compile and the output would be 2.F、 If lines 24, 25 and 26 were removed, the code would compile and the output would be 1.

考题 public class Foo {  public int a;  public Foo() { a = 3; }  public void addFive() { a += 5; }  }  and:  public class Bar extends Foo { public int a;  public Bar() { a = 8; }  public void addFive() { this.a +=5; }  }  invoked with:  Foo foo = new Bar();  foo.addFive();  System.out.println(”Value: “+ foo.a);  What is the result?() A、 Value: 3B、 Value: 8C、 Value: 13D、 Compilation fails.E、 The code runs with no output.F、 An exception is thrown at runtime.

考题 1. public class Blip {  2. protected int blipvert(int x) { return 0; }  3. }  4. class Vert extends Blip {  5. // insert code here  6. }  Which five methods, inserted independently at line 5, will compile?()  A、 public int blipvert(int x) { return 0; }B、 private int blipvert(int x) { return 0; }C、 private int blipvert(long x) { return 0; }D、 protected long blipvert(int x, int y) { return 0; }E、 protected int blipvert(long x) { return 0; }F、 protected long blipvert(long x) { return 0; }G、protected long blipvert(int x) { return 0; }

考题 public class TestFive {  private int x;  public void foo() {  int current = x;  x = current + 1;  }  public void go() {  for(int i=0;i5;i++) {  new Thread() {  public void run() {  foo();  System.out.print(x + “, “);  } }.start();  }}}  Which two changes, taken together, would guarantee the output: 1, 2, 3, 4, 5, ?()A、 Move the line 12 print statement into the foo() method.B、 Change line 7 to public synchronized void go() {.C、 Change the variable declaration on line 3 to private volatile int x;.D、 Wrap the code inside the foo() method with a synchronized( this ) block.E、 Wrap the for loop code inside the go() method with a synchronized block synchronized(this) { // for loop code here }.

考题 Given:   10. class One {   11. void foo() { }   12. }   13. class Two extends One {   14. //insert method here   15. }   Which three methods, inserted individually at line 14, will correctly complete class Two?()A、 public void foo() { /* more code here */ }B、 private void foo() { /* more code here */ }C、 protected void foo() { /* more code here */ }D、 int foo() { /* more code here */ }  E、 void foo() { /* more code here */ }

考题 单选题public class Foo {  public int a;  public Foo() { a = 3; }  public void addFive() { a += 5; }  }  and:  public class Bar extends Foo { public int a;  public Bar() { a = 8; }  public void addFive() { this.a +=5; }  }  invoked with:  Foo foo = new Bar();  foo.addFive();  System.out.println(”Value: “+ foo.a);  What is the result?()A  Value: 3B  Value: 8C  Value: 13D  Compilation fails.E  The code runs with no output.F  An exception is thrown at runtime.

考题 单选题int index = 1;  int [] foo = new int [3];  int bar = foo [index];  int baz = bar + index;   What is the result?()A  Baz has the value of 0B  Baz has the value of 1C  Baz has the value of 2D  An exception is thrown.E  The code will not compile.

考题 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  }Apublic int sum(int a, int b) { return a + b; }Bpublic int sum(long a, long b) { return 0; }Cabstract int sum();Dprivate long sum(long a, long b) { return a + b; }Epublic long sum(long a, int b) { return a + b; }

考题 多选题1. public class Blip {  2. protected int blipvert(int x) { return 0; }  3. }  4. class Vert extends Blip {  5. // insert code here  6. }  Which five methods, inserted independently at line 5, will compile?()Apublic int blipvert(int x) { return 0; }Bprivate int blipvert(int x) { return 0; }Cprivate int blipvert(long x) { return 0; }Dprotected long blipvert(int x, int y) { return 0; }Eprotected int blipvert(long x) { return 0; }Fprotected long blipvert(long x) { return 0; }Gprotected long blipvert(int x) { return 0; }

考题 多选题class One {   public One foo() { return this; }  }  class Two extends One {  public One foo() { return this; }  }  class Three extends Two {   // insert method here  }  Which two methods, inserted individually, correctly complete the Three class?()Apublic void foo() { }Bpublic int foo() { return 3; }Cpublic Two foo() { return this; }Dpublic One foo() { return this; }Epublic Object foo() { return this; }

考题 单选题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);

考题 单选题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”

考题 单选题Given the JSP code: and the Classic tag handler code: 5. public int doStartTag() throws JspException { 6. // insert code here 7. // return int 8. } Assume there are no other "foo" attributes in the web application. Which invocation on the pageContextobject,inserted at line 6,assigns "bar" to the variable x?()A String x = (String) pageContext.getAttribute(foo)B String x = (String) pageContext.getRequestScope(foo)C It is NOT possible to access the pageContext object from within doStartTagD String x = (String) pageContext.getRequest().getAttribute(foo)E String x = (String) pageContext.getAttribute(foo, PageContext.ANY_SCOPE)

考题 单选题int index = 1;   int foo = new int ;   int bar = foo [index];   int baz = bar + index;   What is the result?()A  Baz has the value of 0B  Baz has the value of 1C  Baz has the value of 2D  An exception is thrown.E  The code will not compile.