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 (D)</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 (C)</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 (C)</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 (A)</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 (C)</p> Signup and view all the answers

What is a list in Python?

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

How are list elements accessed in Python?

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

What is the size of a list referred to as?

<p>Size (C)</p> Signup and view all the answers

In Python, how are lists indexed?

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

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

<p>Indexing (D)</p> Signup and view all the answers

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

<p>[0, 12] (B)</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 (A)</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' (B)</p> Signup and view all the answers

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

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

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