PCEP-30-02 3.1 Collect and Process Data Using Lists PCEP-30 Practice Questions (Page 1)

Questions 1–5

1. 1foundation · easy

   Which of the following expressions creates an empty list?

   • ANone
   • B()
   • C{}
   • D[]
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2. 2foundation · easy

   What is the result of the following code? ```python items = ['a', 'b', 'c'] items.insert(1, 'x') print(items) ```

   • A['a', 'b', 'x', 'c']
   • B['x', 'a', 'b', 'c']
   • C['a', 'b', 'c', 'x']
   • D['a', 'x', 'b', 'c']
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4. 3expert · medium

   A developer has `data = [10, 20, 30]` and needs to find the index of the value 25. If 25 is not present, the program should print 'Not found' instead of raising an error. Which code accomplishes this?

   • A`try: print(data.index(25)) except IndexError: print('Not found')`
   • B`if 25 in data: print(data.index(25)) else: print('Not found')`
   • C`print(data.index(25))`
   • D`print(data[data.index(25)])`
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5. 4foundation · easy

   Which method adds a single element to the end of a list?

   • Aextend()
   • Badd()
   • Cappend()
   • Dinsert()
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6. 5expert · hard

   A list `tasks = ['review', 'test', 'deploy', 'review', 'document']` contains duplicate values. A developer must remove ALL occurrences of 'review' from the list, resulting in `['test', 'deploy', 'document']`. Which approach correctly accomplishes this?

   • A`tasks.pop(tasks.index('review'))`
   • B`tasks.remove('review')`
   • C`while 'review' in tasks: tasks.remove('review')`
   • D`for task in tasks: tasks.remove('review')`
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