Answer
Generations:
- Gen0: short-lived objects.
- Gen1: buffer generation.
- Gen2: long-lived objects; full GC expensive.
- LOH: >= 85KB, collected only in full GC.
- POH introduced for pinned objects.
- GC modes: Server, Workstation, Concurrent.
Quick Answer
Gen0 collects frequently and cheaply — most objects die here. Gen1 is a buffer between Gen0 and Gen2. Gen2 collects rarely but is expensive — it scans the full heap. The Large Object Heap (LOH, objects >= 85KB) is collected only during full Gen2 GCs and is not compacted by default, leading to fragmentation.
S
SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ