Which of the following statements accurately describe the characteristics and outcomes of the first$-$fit and best$-$fit memory allocation strategies?

Question $10$ options:

Best$-$fit aims to minimize wasted space by finding the smallest available block that fits the process's requirements, potentially leading to smaller fragments of unused memory.

First$-$fit and best$-$fit strategies both guarantee optimal memory utilization and prevent any form of fragmentation

First$-$fit generally requires less time to scan for a suitable memory block than best$-$fit, as it allocates the first available block that is large enough

Both first$-$fit and best$-$fit can lead to external fragmentation over time as they allocate memory blocks based on different criteria.