1
2
3
4
第1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 }
第2题:
现有: 1. class Synapse { 2. protected int gap() { return 7; } 3. } 4. 5. class Creb extends Synapse { 6. // insert code here 7. } 分别插入到第 6 行,哪三行可以编译?()
第3题:
1. public class Test { 2. public
第4题:
1. class SuperFoo { 2. SuperFoo doStuff(int x) { 3. return new SuperFoo(); 4. } 5. } 6. 7. class Foo extends SuperFoo { 8. //insert code here 9. } 下面哪三项分别插入到第8行,可以编译?()
第5题:
现有: 1.class SuperFoo{ 2.SuperFoo doStuff (int x) { 3.return new SuperFoo(); 4. } 5. } 6. 7. class Foo extends SuperFoo { 8. //insert code here 9. } 和四个声明: Foo doStuff (int x) { return new Foo(); } Foo doStuff (int x) { return new SuperFoo(); } SuperFoo doStuff(int x) { return new Foo(); } SuperFoo doStuff(int y) { return new SuperFoo(); } 分别插入到第8行,有几个可以通过编泽?()
第6题:
int doStuff() { return 42; }
int doStuff(int x) { return 42; }
Foo doStuff(int x) { return new Foo(); }
SuperFoo doStuff(int x) { return new Foo(); }
第7题:
1
2
3
4
5
第8题:
protected int blipvert(long x) { return 0; }
protected long blipvert(int x) { return 0; }
private int blipvert(long x) { return 0; }
private int blipvert(int x) { return 0; }
public int blipvert(int x) { return 0; }
protected long blipvert(long x) { return 0; }
protected long blipvert(int x, int y) { return 0; }
第9题:
public int method1(int a, int b) { return 0; }
private int method1(int a, int b) { return 0; }
private int method1(int a, long b) { return 0; }
public short method1(int a, int b) { return 0: }
static protected int method1(int a, int b) { return 0; }
第10题:
int gap() { return 7; }
public int gap() { return 7; }
private int gap(int x) { return 7; }
protected Creb gap() { return this; }
public int gap() { return Integer.getInteger (42); }
第11题:
Check() can never return true.
Check() can return true when setXY is called by multiple threads.
Check() can return true when multiple threads call setX and setY separately.
Check() can only return true if SyncTest is changed to allow x and y to be set separately.
第12题:
2
3
4
0
1
第13题:
1. class Over{ 2. int doIt(long x) { return 3;} 3. } 4. 5. class Under extends Over{ 6. //insert code here 7. } 和四个方法: short doIt(int y) {return 4;} int doIt(long x,long y){return 4;} private int doIt(Short y){ return 4;} protected int doIt(long x){return 4;} 分别插入到第6行,有几个可以通过编译?()
第14题:
现有: 1.class Over { 2.int dolt (long x) { return 3; } 3. } 4. 5. class Under extends Over { 6.//insert code here 7. } 和四个方法: short dolt (int y) { return 4; } int dolt(long Xr long y) { return 4; } private int dolt(short y) { return 4; } protected int dolt (long x) { return 4; } 分别插入到第6行,有几个可以通过编译?()
第15题:
1. class Synapse { 2. protected int gap() { return 7; } 3. } 4. 5. class Creb extends Synapse { 6. // insert code here 7. } 分别插入到第 6 行,哪三行可以编译?()
第16题:
现有: 1. abstract class Color { 2.protected abstract String getRGB(); 3. } 4. 5. public class Blue extends Color { 6. //insert code here 7. } 和四个声明: public String getRGB() { return "blue"; } String getRGB() { return "blue"; ) private String getRGB() { return "blue"; } protected String getRGB() { return "blue"; ) 分别插入到第6行,有几个可以通过编译?()
第17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?()
第18题:
public int sum(int a, int b) { return a + b; }
public int sum(long a, long b) { return 0; }
abstract int sum();
private long sum(long a, long b) { return a + b; }
public long sum(long a, int b) { return a + b; }
第19题:
int gap() { return 7; }
public int gap() { return 7; }
private int gap(int x) { return 7; }
protected Creb gap() { return this; }
public int gap() { return Integer.getInteger (42); }
第20题:
public int blipvert(int x) { return 0; }
private int blipvert(int x) { return 0; }
private int blipvert(long x) { return 0; }
protected long blipvert(int x, int y) { return 0; }
protected int blipvert(long x) { return 0; }
protected long blipvert(long x) { return 0; }
protected long blipvert(int x) { return 0; }
第21题:
1
2
3
4
第22题:
float getVar() { return x; }
public float getVar() { return x; }
public double getVar() { return x; }
protected float getVar() { return x; }
public float getVar(float f) { return f; }
第23题:
0
1
2
3