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
2026-11-11 19:48:45 +05:30
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+=== Q44 Lambdas and functional interfaces ===
+180.0 true 6 hello 5
+=== Q45 Streams: map, filter, collect, laziness ===
+[ASHA, ARJUN]
+{4=2, 5=2}
+nothing visited yet: no terminal operation
+visited asha
+first = asha
+reuse -> stream has already been operated upon or closed
+=== Q46 Optional ===
+expensive() called
+orElse    : value
+orElseGet : value
+nothing here
+=== Q47 Records ===
+Point[x=1, y=2] equals Point[x=1, y=2]: true, x() = 1
+rejected: negative coordinate
+=== Q48 var, switch expressions and text blocks ===
+{"name": "asha",
+ "grade": "A"}
+=== Q49 Method references and default methods ===
+abc
+walk and swim
+=== Q50 Threads: start() vs run(), and virtual threads ===
+running on: main
+running on: worker-1
+virtual: true