Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Python help. 15) The code for the add method for the ArrayBag class is shown below. What is the missing code? def add(self, item): self.items[len(self)] = item a. self.items +=1 b. self.len = self.items C. self = self + 1 d. self.size += 1 16) What word is best defined as the use of common names for operations on different types of collections? a. anachronism b. polymorphism C. concatenation d. modularization 20) When a programmer calls the next function on an iterator object, what happens if there is no current item in the sequence? a. a Stoplteration exception is raised b. the compiler generates an error C. the previous item is returned d. the None item is returned 22) Consider the following program: class Animal: def __init__(self, name="Dog"): self._name name def getName(self): print(self._name) class Dog(Animal): def __init__(self,name): super().__init__("Cat") dog Dog("Dog") dog.getName() What is displayed when it executes? a. Dog b. ldogl c. Cat d. Nothing is displayed e. The program crashes
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