Computer Science (AS & A Level) · Oct / Nov 2023 · Paper 23 · Question 5

A global 1D array of integers contains four elements, which are assigned values as shown: Mix[1] ← 4 Mix[2] ← 2 Mix[3] ← 3 Mix[4] ← 5 A procedure Process() manipulates the values in the array. The procedure is written in pseudocode as follows: PROCEDURE Process(Start : INTEGER) DECLARE Value, Index, Total : INTEGER Index ← Start Total ← 0 WHILE Total < 20 Value ← Mix[Index] Total ← Total + Value IF Index < 4 THEN Mix[Index] ← Mix[Index] + Mix[Index+1] ELSE Mix[Index] ← Mix[Index] + Mix[1] ENDIF Index ← (Value MOD 4) + 1 ENDWHILE Mix[1] ← Total * Index ENDPROCEDURE Complete the trace table on the opposite page by dry running the procedure when it is called as follows: CALL Process(2) 11 Index Value Total Mix[1] Mix[2] Mix[3] Mix[4] [6]

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