Answer
Boxing converts a value type into an object by allocating memory on the heap.
Frequent boxing/unboxing causes extra allocations, garbage collection pressure, and type-check overhead, which degrade performance.
Quick Answer
Boxing converts a value type into a heap-allocated object. Frequent boxing in loops or large collections causes extra memory allocations, GC pressure, and type-check overhead — all of which degrade performance. Avoid by using generic collections like List instead of ArrayList.
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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