Consider the following code (assume that comments are replaced with real code that works as speciied): public class TestExceptions {
static void e() {
// Might cause any of the following unchecked exceptions to be
// thrown:
// Ex1, Ex2, Ex3, Ex4
}
static void April() { try {
e();
} catch (Ex1 ex) { System. out. println("April caught Ex1");
}
}
static void March() {
try {
April();
} catch (Ex2 ex) { System. out. println("March caught Ex2");
// now cause exception Ex1 to be thrown
}
}
static void February() {
try {
March();
} catch (Ex1 ex) { System. out. println("February caught Ex1");
} catch (Ex3 ex) { System. out. println("February caught Ex3");
}
}
static void a() { try {
February();
} catch (Ex4 ex) {
System. out. println("January caught Ex4");

// now cause exception Ex1 to be thrown
} catch (Ex1 ex) { System. out. println("January caught Ex1");
}
}
public static void main(String[] args) { January();
}
}

Assume now that this program is run four times. The first time, method throws exception Ex1, the second time, it throws exception Ex2, etc.

What are the results of the four runs (a or b)?

a.
1. The program prints: April caught Ex1
2. The program prints: March caught Ex2 February caught Ex1
3. The program prints: February caught Ex3
4. The program prints: January caught Ex4
And execution stops due to an uncaught exception Ex1 thrown in
main()

b.
1. The program prints: April caught Ex3
2. The program prints: March caught Ex2 February caught Ex2
3. The program prints: March caught Ex3
4. The program prints: January caught Ex4
And execution stops due to an uncaught exception Ex1 thrown in
main()