Analyze the following code:

Question

```
class Test {
private double i;

public Test(double i) {
this.t();
this.i = i;
}

public Test() {
System.out.println("Default constructor");
this(1);
}

public void t() {
System.out.println("Invoking t");
}
}
```
a. this.t() may be replaced by t().
b. this.i may be replaced by i.
c. this(1) must be called before System.out.println("Default constructor").
d. this(1) must be replaced by this(1.0).

Answer 1

a. this.t() may be replaced by t().
c. this(1) must be called before System.out.println("Default constructor").