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题目
题目

CSE 1223 SP2025 (37178) Quiz: Week 06

多重下拉选择题

What should be substituted for WWW, XXX, YYY, and ZZZ in the following piece of code? This code prompts the user for a string and then uses a loop to print the characters of the string on the odd indices in reverse order. Example: Enter a String: Goodbye ydo WWW:          [ Select ] 0 str.length() - 1 1 str.length() XXX:              [ Select ] idx < str.length() idx <= str.length() idx > 0 idx >= 0 YYY:               str.charAt (idx) ZZZ:               idx = idx - 1

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The problem asks us to fill four placeholders WWW, XXX, YYY, and ZZZ in a code snippet that prompts for a string and then uses a loop to print characters at odd indices in reverse order. Option by option reasoning: WWW options: - 'str.length() - 1': This is a common choice for initializing an index to the last valid position in a string, since indices range from 0 to str.length() - 1. Using this as the starting index allows traversal from the end toward the front. - 'str.length()': This would set the starting index to one past the final valid index (since valid last index is str.length() - 1). Accessing str.charAt(str.length()) would typically ca......Login to view full explanation

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