Java Exception MCQ - Quiz

Q: Which keyword is used to explicitly throw an exception?

Q: Exception generated in try block is caught in ........... block.

Q: Which keyword is used to specify the exception thrown by the method?

Q: Which of the following blocks execute compulsorily whether an exception is caught or not.

Q: What happen in case of multiple catch blocks?

Q: Given the following piece of code:

class SalaryCalculationException extends Exception{}
class Person{
        public void calculateSalary() throws SalaryCalculationException{
                //...
                throw new SalaryCalculationException();
                //...
        }
}
class Company{
        public void paySalaries(){
                new Person().calculateSalary();
        }
}

Which of the following statements is correct?
1. This code will compile without any problems.
2. This code will compile if in method paySalaries() we return a boolean in stead of void.
3. This code will compile if we add a try-catch block in paySalaries().
4. This code will compile if we add throws SalaryCalculationException in the signature of method paySalaries().

Q:

try{
      File f = new File("a.txt");
}catch(Exception e){
}catch(IOException io){
}

Q: Which of the below statement is/are true about Error?

A. An Error is a subclass of Throwable.
B. An Error is a subclass of Exception.
C. Error indicates serious problems that a reasonable application should not try to catch.
D. An Error is a subclass of IOException.

Q: What will be the result after the class Test execution?

class A{
      public void doA(){
            B b = new B();
            b.dobB();
            System.out.print("doA");
      }
}
class B{
      public void dobB(){
            C c = new C();
            c.doC();
            System.out.print("doB");
      }
}
class C{
      public void doC(){
            if(true)
            throw new NullPointerException();
            System.out.print("doC");
      }
}
public class Test{
      public static void main(String args[]){
            try{
                  A a = new A();
                  a.doA();
            }catch(Exception ex){
                  System.out.print("error");
            }
      }
}

Q: Given the code. What is the result when this program is executed?

public class Test{
      static int x[];
    
      static{
            x[0] = 1;
      }
    
      public static void main(String args[]){
      }
}