Top 25 Exception Interview Questions For Coffee Programmers

1) The deviation betwixt checked as well as unchecked Exception inwards Java?
For checked exceptions, the compiler ensures that they are either handled using try-catch, try-finally or try-catch-finally block or thrown away. If a method, which throws a checked exception e.g IOException as well as doesn't grip them or doesn't declare them inwards throws degree of method, a compile-time fault volition occur. On the other hand, the compiler doesn't do similar checks for an unchecked exception, that's why it is known every bit un-checked. These are too called runtime exception because they extend java.lang.RuntimeException.

There is around other deviation betwixt checked as well as unchecked exception,  checked exceptions are those exception classes, which are a subclass of java.lang.Exception only non of java.lang.RuntimeException, on the other hand, the unchecked exception e'er extends RuntimeException.

Some of the well-known examples of checked exceptions are IOException, SQLException, ParseException, etc, piece java.lang.ArrayIndexOutOfBoundsException, IllegalArgumentException and java.lang.NullPointerException has most seen examples of unchecked exception inwards Java. See my post checked vs runtime exception for to a greater extent than differences.


2) What is the deviation betwixt throw as well as throws inwards Java? (answer)

3) Difference betwixt finally, finalize as well as finalizer inwards Java? (answer)

4) What happens when a Thread gets uncaught exception? (answer)

5) Does in conclusion runs always? On which representative in conclusion doesn't run? (answer)

6) What is try-with-resource or automatic resources management? (answer)

7) How to larn a electrical flow stack describe of a Thread? (answer)

8) Difference betwixt Error as well as Exception inwards Java? (answer)

9) Difference betwixt NoClassDefFoundError as well as ClassNotFoundException inwards Java? (answer)

10) What is chaining of Exception? (answer)

11) How to do custom Exceptions inwards Java? (answer)

12) Can nosotros bring a endeavour block without a catch? (answer)

13) What are the 5 keywords used inwards Exception handling? (answer)

14) Can you lot pick out receive got of Error similar java.lang.OutOfMemoryError inwards Java? (answer)


15) What is the work alongside the below code?

import java.io.FileNotFoundException; import java.io.IOException;  public class ExceptionInterviewQuestion_01 {      public static void main(String[] args) {         try {             multiple();         } catch (FileNotFoundException | IOException ex) {             e.printStackTrace();         }     }      public static void multiple() throws IOException, FileNotFoundException{                  System.out.println("Inside multiple");     }  }

Output: 
This plan volition non compile as well as give you lot the fault  “The exception FileNotFoundException is already caught past times the option IOException”, because FileNotFoundException is a subclass of IOException.

There are 2 ways to solve this work :

1) Use Simple Catch Block as well as grip FileNotFoundException earlier IOException

try {     multiple(); }catch(FileNotFoundException ex){     ex.printStackTrace(); }catch (IOException  e) {     ex.printStackTrace(); }

2) Only grip IOException instead of both FileNotFoundException as well as IOException.

try {     multiple(); }catch (IOException  e) {     ex.printStackTrace(); }

You tin sack farther see answer)

23) What are around of the best practices you lot follow piece treatment Errors as well as Exception inwards Java? (answer)

24) What are the pros as well as cons of catching Throwable or Error? (answer)


That's all almost around frequently asked Java Exception interview questions. See, how many questions you lot tin sack reply from this list. I'll post the reply after only if you lot know the reply you lot tin sack e'er percentage on the comments section.

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