Match core methods: 1. Len: p. Char count 2. CharAt: q. Pos char 3. Trim: r. Strip
A1-p, 2-q, 3-r
B1-p, 2-r, 3-q
C1-q, 2-p, 3-r
D1-r, 2-p, 3-q
Answer & Solution
Correct answer: A. 1-p, 2-q, 3-r
The length method measures character count, charAt selects a character at an index, and trim strips surrounding whitespace.
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