O-LevelComputer ScienceProgramming2210/22 · May/June 2023 · Q117 Marks

The variables P and Q are used to store data in a program. P stores a string. Q stores a character.

(a)Write pseudocode statements to declare the variables P and Q, store "The world" in P and store 'w' in Q[2]
(b)Write a pseudocode algorithm to: • convert P to upper case • find the position of Q in the string P (the first character in this string is in position 1) • store the position of Q in the variable Position[4]
(c)Give the value of Position after the algorithm has been executed with the data in question 11(a).[1]

Mark scheme

Marking points from the official mark scheme (May/June 2023). The mark or mark type is shown in brackets.

[2] One mark for any two correct lines DECLARE P : STRING P ← "The world" DECLARE Q : CHAR Q ← 'W'
[4] One mark for each point (max four) • converting P to upper case • finding the length of P • using a loop to check for position of Q • using the string operation substring • storing the loop counter in Position if the value is found For example: P ← UCASE (P) Counter ← 1 Position ← 0 REPEAT IF SUBSTRING(P, Counter, 1) = Q THEN Position ← Counter ENDIF Counter ← Counter + 1 UNTIL Position <> 0 OR Counter = LENGTH(P)
[1] 5

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