评分标准模式

Key Command Words

Command Word	Meaning	Typical Mark
Declare	Create the array variable with size	M1
Initialise	Set initial values (often 0)	A1
Read / Input	Accept values from user or file	M1
Store	Place value into array element	A1
Traverse / Loop	Use iterative statement to access each element	M1
Calculate	Perform arithmetic on array elements	M2
Output / Display	Print or return the result	A1
Search	Find a value in the array	M1
Find max/min	Identify largest/smallest element	M2

Common Mark Scheme Patterns

Pattern 1: Declaration Only (1–2 marks)

• M1 correct array name, correct size, correct data type (implied by initial value)
• A1 all elements initialised correctly

Pattern 2: Input and Store (4–6 marks)

• M1 array declared with correct size
• M2 loop construct (for i in range(N))
• A1 read/accept value inside loop
• B1 store at correct index / correct data conversion

Pattern 3: Processing (2–4 marks)

• M1 correct loop to traverse array
• M2 correct processing logic (sum, comparison, etc.)
• A1 correct result stored and/or output

Pattern 4: 2D Array (3–5 marks)

• M1 correct 2D array declaration (nested list comprehension)
• M2 nested loops with correct bounds
• A1 correct row/column indexing
• B1 correct processing

Mark Allocation Logic

• M marks are for structure/method: loop, condition, function definition
• A marks are for accuracy: correct variable, correct operation, correct output
• B marks are for bonus/alternative: type conversion, file handling, edge cases

Common MS Phrases

"Allow equivalent mark if logic is correct but syntax has minor errors."

"M1 for loop – accept for i in range(10) or equivalent."

"A1 for correct use of array indexing – accept Arr[i]."

"If array not declared, penalise M1 but can still award A1 for correct logic."