Which of the following requires a hard fork? (check all that apply)
Hard fork happens only if invalid block becomes valid. Only in case 3 this happens.
Disabling an instruction will make valid block invalid, not vice-versa
Require sorting will make valid block invalid, not vice-versa
Increasing the block size limit from, say, 100 to 120 will make block of size 110 valid which was invalid before, that's a hard fork.
Decreasing block size will make valid block invalid, not vice-versa
| Disabling the OP_SHA1 instruction | Wrong |
| A requirement that each transaction have its outputs sorted by value in ascending (or non-decreasing) order | Wrong |
| Increasing the maximum permitted size of blocks | Correct |
| Decreasing the maximum permitted size of blocks | Wrong |
Hard fork happens only if invalid block becomes valid. Only in case 3 this happens.
Disabling an instruction will make valid block invalid, not vice-versa
Require sorting will make valid block invalid, not vice-versa
Increasing the block size limit from, say, 100 to 120 will make block of size 110 valid which was invalid before, that's a hard fork.
Decreasing block size will make valid block invalid, not vice-versa
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