The museum archive program is to create a label for each newly scanned photograph. An operator enters the cabinet code BX7 and the photograph number 184. Th...
Question 1 Report
The museum archive program is to create a label for each newly scanned photograph. An operator enters the cabinet code BX7 and the photograph number 184. The main program must display one text message in this format:
BX7:184
The two values are stored as strings. The skeleton program contains the statement:
label ← cabinetCode ... photoNumber
(a) State the string operator that should replace the dots in the statement. [1]
(b) Describe the value stored in label(c) Explain why the program should not use an arithmetic addition operator to combine these two entered values. [3]
(d) Suggest one test value for cabinetCode that would help a programmer check that the displayed message is still clear when a cabinet has a longer code. [2]
Answer Details
(a) Use a concatenation operator, for example + or &, to join the string values. [1]
(b) The value stored in label is one string containing BX7, then a colon, then 184. [1] It is displayed as BX7:184. [1]
(c) The entered values are strings, meaning text data. [1] Arithmetic addition is used for numeric values, not to build text labels. [1] Concatenation joins characters to produce the required label. [1]
(d) A suitable longer test value is BX7WEST or CABINET12. [1] Use it with a photograph number to check that the complete label remains readable and is joined correctly, for example BX7WEST:184. [1]
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