# Questions by nilamd

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Please provide codes for 0-9 decimal using 4311 code..i am little bit confused in it..I know the property that addition 9 makes it self complemetory..but how m nt understanding..plz help..
Consider the following Two Transactions. A) How many recoverable schedules can be formed over $T_{1}$ & $T_{2}$ ? $51$ $52$ $55$ $56$ B) How many cascadeless recoverable schedules can be formed over $T_{1}$ & $T_{2}$ ? $41$ $42$ $45$ $50$