a = 1McKinney Chapter 3 - Practice Blank
FINA 6333 for Spring 2024
1 Announcements
2 Practice
2.1 Swap the values assigned to a and b using a third variable c.
b = 22.2 Swap the values assigned to a and b without using a third variable c.
a = 1b = 22.3 What is the output of the following code and why?
1, 1, 1 == (1, 1, 1)(1, 1, False)2.4 Create a list l1 of integers from 1 to 100.
2.5 Slice l1 to create a list of integers from 60 to 50 (inclusive).
Name this list l2.
2.6 Create a list l3 of odd integers from 1 to 21.
2.7 Create a list l4 of the squares of integers from 1 to 100.
2.8 Create a list l5 that contains the squares of odd integers from 1 to 100.
2.9 Use a lambda function to sort strings by the last letter.
strings = ['card', 'aaaa', 'foo', 'bar', 'abab']2.10 Given an integer array nums and an integer k, return the \(k^{th}\) largest element in the array.
Note that it is the \(k^{th}\) largest element in the sorted order, not the \(k^{th}\) distinct element.
Example 1:
Input: nums = [3,2,1,5,6,4], k = 2
Output: 5
Example 2:
Input: nums = [3,2,3,1,2,4,5,5,6], k = 4
Output: 4
I saw this question on LeetCode.
2.11 Given an integer array nums and an integer k, return the k most frequent elements.
You may return the answer in any order.
Example 1:
Input: nums = [1,1,1,2,2,3], k = 2
Output: [1,2]
Example 2:
Input: nums = [1], k = 1
Output: [1]
I saw this question on LeetCode.
2.12 Test whether the given strings are palindromes.
Input: ["aba", "no"]
Output: [True, False]
2.13 Write a function returns() that accepts lists of prices and dividends and returns a list of returns.
prices = [100, 150, 100, 50, 100, 150, 100, 150]
dividends = [1, 1, 1, 1, 2, 2, 2, 2]2.14 Rewrite the function returns() so it returns lists of returns, capital gains yields, and dividend yields.
2.15 Rescale and shift numbers so that they cover the range [0, 1].
Input: [18.5, 17.0, 18.0, 19.0, 18.0]
Output: [0.75, 0.0, 0.5, 1.0, 0.5]
numbers = [18.5, 17.0, 18.0, 19.0, 18.0]