Python Basics: Lists for Big Data Analysis
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Questions and Answers

How many nested for loops are used to scan a 2D list?

  • 3
  • 2 (correct)
  • N
  • 1

    • When scanning a 1D list, how many nested for loops are recommended?

  • N
  • 1 (correct)
  • 3
  • 2

    • For scanning a 3D list, how many nested for loops are suggested?

  • 2
  • 3 (correct)
  • 1
  • N

    • How are elements in a 2-D list accessed?

    <p>Using both a row index and a column index</p> Signup and view all the answers

    What is the range for the row index in a 2-D list?

    <p>0 to the number of rows minus 1</p> Signup and view all the answers

    In the given example, what value is assigned to the element with row index 3 and column index 1?

    <p>39</p> Signup and view all the answers

    How is scanning done in a 2-D list?

    <p>Using two for loops to scan the rows and columns</p> Signup and view all the answers

    What does the variable 'num_cols' represent when scanning a 2-D list?

    <p>The number of elements per row in the list</p> Signup and view all the answers

    What is a list in Python?

    <p>A data structure that holds multiple values</p> Signup and view all the answers

    How are list elements accessed in Python?

    <p>Using an index value</p> Signup and view all the answers

    What is the size of a list referred to as?

    <p>Size</p> Signup and view all the answers

    In Python, how are lists indexed?

    <p>Base-0 indexing</p> Signup and view all the answers

    Which term is used to refer to accessing one entry within a list?

    <p>Indexing</p> Signup and view all the answers

    What is the correct range of index values for a list with 13 elements?

    <p>[0, 12]</p> Signup and view all the answers

    How can an element of a list be set to a new value?

    <p>By using an assignment statement with the proper index</p> Signup and view all the answers

    What is the result of the expression 'total_ages += ages' in Python?

    <p>Adds each element of 'ages' list to 'total_ages'</p> Signup and view all the answers

    What does a two-dimensional (2D) list resemble?

    <p>A table or matrix with rows and columns</p> Signup and view all the answers

    How many memory locations are reserved for a 2-D list?

    <p>Equal to its number of rows multiplied by number of columns</p> Signup and view all the answers

    What does a for loop do in the context of a list?

    <p>It prints each element of the list on a new line</p> Signup and view all the answers

    What is the purpose of using an index when setting elements in a list?

    <p>To determine the position of the element in the list</p> Signup and view all the answers

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