Problem Statement
If a system uses demand paging and the working set of all processes is larger than physical memory, what state might the system enter?
Explanation
When demand-paged processes each keep triggering page faults because their combined working sets exceed available physical memory frames, the system spends more time swapping pages in and out than doing productive work — this is thrashing. Recognising thrashing is a classic advanced OS interview topic. :contentReference[oaicite:0]{index=0}
