Set 11

Multiple Choice Question

QID: 
310

What will the following program print when compiled and run?

class Data {
private int x = 0;
private String y = "Y";
public Data(int k){
this.x = k;
}
public Data(String k){
this.y = k;
}
public void showMe(){
System.out.println(x+y);
}
}public class TestClass {
public static void main(String[] args) throws Exception {
new Data(10).showMe();
new Data("Z").showMe();
}
}

Select 1 option

A. 0Z
10Y
B. 10Y
0Z
C. It will not compile.
D. It will throws an exception at run time.

Multiple Choice Question

QID: 
309

Consider the classes shown below:

class A{
public A() { }
public A(int i) { System.out.println(i ); }
}
class B{
static A s1 = new A(1);
A a = new A(2);
public static void main(String[] args){
B b = new B();
A a = new A(3);
}
static A s2 = new A(4);
}

Which is the correct sequence of the digits that will be printed when B is run?

Select 1 option

A. 1 ,2 ,3 4.
B. 1 ,4, 2 ,3
C. 3, 1, 2, 4
D. 2, 1, 4, 3
E. 2, 3, 1, 4

Multiple Choice Question

QID: 
308

Which of the following classes have a default constructor?

class A{  }
class B {  B(){ } }
class C{  C(String s){ } }

Select 1 option

A. A
B. A and B
C. B
D. C
E. B and C

Multiple Choice Question

QID: 
307

Which of the following can be used as a constructor for the class given below?

public class TestClass{
   // lots of code ...
}

Select 2 options

A. public void TestClass() {...}
B. public TestClass() {...}
C. public static TestClass() {...} 
D. public final TestClass() {...}
E. public TestClass(int x) { ...}

Multiple Choice Question

QID: 
306

Which lines contain a valid constructor in the following code?

public class TestClass{
public TestClass(int a, int b) { } // 1
public void TestClass(int a) { } // 2
public TestClass(String s); // 3
private TestClass(String s, int a) { } //4
public TestClass(String s1, String s2) { }; //5
}

Select 3 options

A. Line // 1
B. Line // 2
C. Line // 3
D. Line // 4
E. Line // 5

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