What happens when the following code segment executes if test.txt does not exist? infile = open("test.txt", "r") Select one: The file test.txt is created as a new empty file The program raises an exception All attempts to read from the file return an empty string All attempts to read from the file return random values

What happens when the following code segment executes if test.txt does not exist? infile = open("test.txt", "r") Select one: The file test.txt is created as a new empty file The program raises an exception All attempts to read from the file return an empty string All attempts to read from the file return random values

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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Concept explainers

Stack operations

A stack is a linear data structure that follows certain order to perform the operation; the order will be LIFO (Last In First Out) data structure. In the stack data structure elements/items are removed and added only from the top. The topmost stack item/element is pointed by the top pointer and the element which is added to the stack first will get deleted at the last.

Question

What happens when the following code segment
executes if test.txt does not exist?
infile = open("test.txt", "r")
Select one:
The file test.txt is created as a new empty
file
The program raises an exception
All attempts to read from the file return an
empty string
All attempts to read from the file return
random values

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