1. Which one of the following takes a positive integer n and returns the sum of the squares of all the even positive integers smaller than n? Group of answer choices a) total = sum(j*j for j in range(1, n+1, 2)) b) total = sum(j*j for j in range(0, n, 2)) c) total = sum(j for j in range(0, n+1, 2)) 2. Given a statement in the following, which options are correct? (Select all that applies.) portfolio = {'GOOGL': 100, 'META': 123, 'MSFT': 254, 'AAPL': 147, 'AMZN': 94} Group of answer choices a) "portfolio" is a dictionary. b) portfolio['PNC'] = 164 # This command adds the new item as the last item of "portfolio". c) len(portfolio) = 12 after adding the (PNC, 164) key-value pair. d) del(portfolio['PNC']) # This command removes the specified item from "portfolio". 3. Here is the Python’s list comprehension syntax to produce the list of this 26 characters ['a', 'b', 'c', ..., 'z']: [chr(k) for k in range(97, 123)] Group of answer choices a) True b) False
1. Which one of the following takes a positive integer n and returns the sum of the squares of all the even positive integers smaller than n? Group of answer choices a) total = sum(j*j for j in range(1, n+1, 2)) b) total = sum(j*j for j in range(0, n, 2)) c) total = sum(j for j in range(0, n+1, 2)) 2. Given a statement in the following, which options are correct? (Select all that applies.) portfolio = {'GOOGL': 100, 'META': 123, 'MSFT': 254, 'AAPL': 147, 'AMZN': 94} Group of answer choices a) "portfolio" is a dictionary. b) portfolio['PNC'] = 164 # This command adds the new item as the last item of "portfolio". c) len(portfolio) = 12 after adding the (PNC, 164) key-value pair. d) del(portfolio['PNC']) # This command removes the specified item from "portfolio". 3. Here is the Python’s list comprehension syntax to produce the list of this 26 characters ['a', 'b', 'c', ..., 'z']: [chr(k) for k in range(97, 123)] Group of answer choices a) True b) False
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Question
1. Which one of the following takes a positive integer n and returns the sum of the squares of all the even positive integers smaller than n?
Group of answer choices
a) total = sum(j*j for j in range(1, n+1, 2))
b) total = sum(j*j for j in range(0, n, 2))
c) total = sum(j for j in range(0, n+1, 2))
2. Given a statement in the following, which options are correct? (Select all that applies.)
portfolio = {'GOOGL': 100, 'META': 123, 'MSFT': 254, 'AAPL': 147, 'AMZN': 94}
Group of answer choices
a) "portfolio" is a dictionary.
b) portfolio['PNC'] = 164 # This command adds the new item as the last item of "portfolio".
c) len(portfolio) = 12 after adding the (PNC, 164) key-value pair.
d) del(portfolio['PNC']) # This command removes the specified item from "portfolio".
3. Here is the Python’s list comprehension syntax to produce the list of this 26 characters ['a', 'b', 'c', ..., 'z']:
[chr(k) for k in range(97, 123)]
Group of answer choices
a) True
b) False
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