Does fragmentation occur at all time in memory partition?

Yes, fragmentation can occur at all times in memory partitioning. It arises when free memory blocks are scattered throughout the partition, making it difficult to allocate larger contiguous memory segments, even if the total free memory is sufficient. Over time, as processes are allocated and deallocated, both internal and external fragmentation can increase, leading to inefficient memory use. Regular memory management techniques, like compaction, can help mitigate fragmentation issues.