
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
expand_more
expand_more
format_list_bulleted
Concept explainers
Question

Transcribed Image Text:ns the
sa sing
turns t
to and
er
eturns
file. E
he new
C
Question 6
In the following code, what values does the loop index x take in each iteration?
infile = open("filename.txt", "r")
for x in infile:
# more code
Numbers 0, 1, 2, ...
Each line of the file with name "filename.txt"
Each character of the file with name "filename.txt"
1 pts
Each character of the string "filename.txt"
1 pts
Expert Solution

This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution
Trending nowThis is a popular solution!
Step by stepSolved in 2 steps

Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.Similar questions
- What does the following python code do? f = open("sample.txt", "w") Choose all that apply. Select 2 correct answer(s) a. writes "w" to the file called sample.txt b. if the file sample.txt exists, deletes everything in it c. closes a file called sample.txt d. If the file called sample.txt exists, it writes at the bottom of the file e. opens a file called sample.txt for appending f. if the file sample.txt does not exist, it creates the file and opens it for writing g. reads the file called sample.txt starting from the top h. opens a file called sample.txt for readingarrow_forwardUSING C++ PLEASE CREATE THREE FILES! IntCollection.h (or IntCollection.hpp): class definition IntCollection.cpp: class implementation main.cpp, including sample output and your answer to question 6 at the bottom. : main program to run the code The following code creates an IntCollection object named ‘c’. It adds seven integers to ‘c’, then uses a for loop to display the seven integers: int main() { IntCollection c; c.add(45); c.add(-210); c.add(77); c.add(2); c.add(-21); c.add(42); c.add(7); for (int i = 0; i < c.getSize(); i++) { cout << c.get(i) << endl; } } For this assignment you will add a copy constructor, a destructor, and three overloaded operators to the IntCollection class. In the design diagram below, the black member functions represent code that has already been implemented. You will be implementing the green items. Each item that you will be adding to the class is described below the diagram. private: int size // the number of ints currently stored in…arrow_forward6. Write a program that will randomly generate 500 integer numbers in the range -249 to 250. Write thosenumbers in a text file named “in.txt”. Now Sort (in ascending order) all the integer numbers in the file “in.txt”using Buuble Sort. Save the sorted output into another text file named “out.txt”. (Try to write separatefunction for SWAP and BUBBLE_SORT and call them from main function.)arrow_forward
- WAP to read 4 student objects and write them into a file, then print total number of student number in file. After that read an integer and print details of student stored at this number in the file using random access and file manipulators.arrow_forwardAnswer the given question with a proper explanation and step-by-step solution. 1- Write code that does the following: opens an output file with the filename number_list.txt, uses a loop to write the numbers 1 through 100 to the file, then closes the file.arrow_forwardCan you help me write the following C++ program: Add a search command to the file viewer created. Thiscommand asks the user for a string and finds the first line that containsthat string. The search starts at the first line that is currently displayedand stops at the end of the file. If the string is found, then the file willbe scrolled down so that when it is redisplayed, the line that contains thestring is the first line at the top of the window.If the string is not found, the program prints the following error messageat the top of the screen:ERROR: string X was not foundwhere X is replaced by the string entered by the user. In that case, theprogram redisplays the lines that the user was viewing before the searchcommand was executed.Modify the program as little as possible. Make sure you assign new responsibilities to the most appropriate components. Use the C++ string operation find. The file viewer code is given below: // FileViewer.cpp #include "FileViewer.h" using namespace…arrow_forward
- <<Write in Java>> - Challenge 7 File encryption is the science of writing the contents of a file in a secret code. Your encryption program should work like a filter, reading the contents of one file, modifying the data into a code, and then writing the coded contents out to a second file. The second file will be a version of the first file, but written in a secret code. Although there are complex encryption techniques, you should come up with a simple one of your own. For example, you could read the first file one character at a time, and add 10 to the character code of each character before it is written to the second file. - Challenge 8 Write a program that decrypts the file produced by the program in Programming Challenge 7. The decryption program should read the contents of the coded file, restore the data to its original state, and write it to another filearrow_forwardMilestone #1 - Ask Quiz Type In a file called main.py, implement a program that asks the user for a quiz type and prints the file name for that quiz type. The program should have one input prompt: the integer value of the personality quiz number. Your program should print the welcome message and the list of the personality quizzes, ask for the test number, and then print the file name. You are required to use the provided dictionary with the personality quizzes names. The list of the personality quizzes should be printed in alphabetical order. See example below. Welcome to the Personality Quiz! What type of Personality Quiz do you want to run? 1 BabyAnimals 2 Brooklyn99 3 Disney 4 Hogwarts 5 MyersBriggs 6 Sesame Street 7 - StarWars 8 - Vegetablesarrow_forwardCreate a .txt file with 3 rows of various movies data of your choice in the following table format: Movie ID number of viewers rating release year Movie name 0000012211 174 8.4 2017 "Star Wars: The Last Jedi" 0000122110 369 7.9 2017 "Thor: Ragnarok" Create a class Movie which instantiates variables corresponds to the table columns. Implement getters, setters, constructors and toString. ----Important 1. Implement two search methods to search Movies by their rating from unsorted array and by year (first) and a rating (second) from unsorted List. Test your methods and explain their time complexity.arrow_forward
- Project Details: Your program should read in a random word from a file called words.txt (note the lack of capitalization) that you provide. The file should contain one word per line. To read a random word you can generate a random number between 1 and the number of lines, and skip n-1 lines before reading the word. Scramble the word by swapping random pairs of letters a random number of times. Display the scrambled word with character indexes on top. Offer the user a menu with the following choices: • Enter 1 to swap a pair of letters If this option is selected prompt the user to enter two indexes and swap the letters. Print an error message if the indexes are invalid. If the word is unscrambled successfully print a congratulatory message containing the word and the number of steps it took to unscramble. Otherwise display the new word, and offer the menu again. • Enter 2 to solve If this option is selected print the unscrambled word and quit. • Enter 3 to quit If this option is…arrow_forwardThis program asks the user to enter 4 names for a team, storing them in an array of Strings. Then the program asks for one of those names again, and a new name to substitute instead of that one. Finally, the program changes the array, making that substitution. This modified list of names is printed on the screen. You can see sample output at the end of this file.arrow_forward9b_act2. Please help me answer this in python programming.arrow_forward
arrow_back_ios
arrow_forward_ios
Recommended textbooks for you
- Database System ConceptsComputer ScienceISBN:9780078022159Author:Abraham Silberschatz Professor, Henry F. Korth, S. SudarshanPublisher:McGraw-Hill EducationStarting Out with Python (4th Edition)Computer ScienceISBN:9780134444321Author:Tony GaddisPublisher:PEARSONDigital Fundamentals (11th Edition)Computer ScienceISBN:9780132737968Author:Thomas L. FloydPublisher:PEARSON
- C How to Program (8th Edition)Computer ScienceISBN:9780133976892Author:Paul J. Deitel, Harvey DeitelPublisher:PEARSONDatabase Systems: Design, Implementation, & Manag...Computer ScienceISBN:9781337627900Author:Carlos Coronel, Steven MorrisPublisher:Cengage LearningProgrammable Logic ControllersComputer ScienceISBN:9780073373843Author:Frank D. PetruzellaPublisher:McGraw-Hill Education

Database System Concepts
Computer Science
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:McGraw-Hill Education

Starting Out with Python (4th Edition)
Computer Science
ISBN:9780134444321
Author:Tony Gaddis
Publisher:PEARSON

Digital Fundamentals (11th Edition)
Computer Science
ISBN:9780132737968
Author:Thomas L. Floyd
Publisher:PEARSON

C How to Program (8th Edition)
Computer Science
ISBN:9780133976892
Author:Paul J. Deitel, Harvey Deitel
Publisher:PEARSON

Database Systems: Design, Implementation, & Manag...
Computer Science
ISBN:9781337627900
Author:Carlos Coronel, Steven Morris
Publisher:Cengage Learning

Programmable Logic Controllers
Computer Science
ISBN:9780073373843
Author:Frank D. Petruzella
Publisher:McGraw-Hill Education