Add fresher-qa module: 50 Java interview questions for freshers, one runnable demo each, asserted transcripts, javac error captures

Co-Authored-By: Claude Sonnet 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_017ic4b5DfjBGLBr7F5km2AN

fresher-qa/output/05-exceptions.txt

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+=== Q39 Checked vs unchecked exceptions ===
+checked:   NoSuchFileException (is an IOException: true)
+unchecked: ArithmeticException: / by zero
+NoSuchFileException is checked: true
+=== Q40 try, catch, finally and return ===
+finally runs before the method actually returns
+returned 1
+primitiveSnapshot = 10
+finallyOverrides = 7
+=== Q41 throw vs throws, and custom exceptions ===
+withdrawal refused <- cause: balance 100 < 500
+=== Q42 try-with-resources and suppressed exceptions ===
+open first
+open second
+close second
+close first
+caught: body failed
+suppressed: close failed: second
+=== Q43 Error vs Exception, and multi-catch ===
+Error, not Exception: Requested array size exceeds VM limit
+multi-catch caught ClassCastException