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Python Basics: Lists for Big Data Analysis

20 Questions

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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?

2 (correct)

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

1 (correct)

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

3 (correct)

How are elements in a 2-D list accessed?

Using both a row index and a column index Signup and view all the answers

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

0 to the number of rows minus 1 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?

39 Signup and view all the answers

How is scanning done in a 2-D list?

Using two for loops to scan the rows and columns Signup and view all the answers

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

The number of elements per row in the list Signup and view all the answers

What is a list in Python?

A data structure that holds multiple values Signup and view all the answers

How are list elements accessed in Python?

Using an index value Signup and view all the answers

What is the size of a list referred to as?

Size Signup and view all the answers

In Python, how are lists indexed?

Base-0 indexing Signup and view all the answers

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

Indexing Signup and view all the answers

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

[0, 12] Signup and view all the answers

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

By using an assignment statement with the proper index Signup and view all the answers

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

Adds each element of 'ages' list to 'total_ages' Signup and view all the answers

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

A table or matrix with rows and columns Signup and view all the answers

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

Equal to its number of rows multiplied by number of columns Signup and view all the answers

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

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

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

To determine the position of the element in the list Signup and view all the answers