Given that:

What expression involving the variable things_to_fetch reduces to 'T'?

Question

Given that: 
  
What expression involving the variable things_to_fetch reduces to 'T'?

BlackTom AI · Accepted Answer

The prompt provides a short-answer question involving nested indexing with the variable things_to_fetch. To understand how the expression behaves, break down the indexing step by step using typical language constructs like lists or strings in a zero-based indexing scheme.

Step 1: Evaluate things_to_fetch[1]. In most languages with zero-based indexing, [1] selects the second element of the top-level collection things_to_fetch. So after this step you have the value that sits at index 1 of things_to_fetch.

Step 2: Take the result from Step 1 and apply [1] again: (things_to_fetch[1])[1]. This selects the second element of the previously selected value. If the previously selected value is itself a list (or a string, or similar sequence), [1] picks its second element.

Step 3: Apply [2] to the outcome of Step 2: ((things_to_fetch[1])[1])[2]. This selects the third element of the second-level item obtained in Step 2. If that innermost item is a string, this could be either a character at position 2 (if treated as a string/sequence) or the third element of a nested list.

Given the problem statement that the expression reduces to 'T', the innermost value at that position must be the character or element 'T'. In other words, the third element of the second-level item within the second element of things_to_fetch is the symbol 'T'. This is consistent with how nested indexing would yield a single-character string 'T' when the innermost container exposes that character at index 2.

If any part of this reasoning seems abstract, you can sanity-check with concrete structure expectations: things_to_fetch is a collection; things_to_fetch[1] picks its second item; [1] on that picks its second sub-item; [2] then accesses the third item of that sub-item. The final value being 'T' confirms the innermost element is indeed 'T' at that position.

Combined CS-126 sections - (1257-4967) COMPUTER SCIENCE I (Fall 2025 M16) 002 Module 2 - Midterm Exam | Quiz

Given that: What expression involving the variable things_to_fetch reduces to 'T'?

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