Python File Handling MCQ: Practice with Multiple Choice Questions

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Questions and Answers

When opening a file for reading, what happens if the file does not exist?

A new file is created

An error occurs (correct)

All of the mentioned

The existing file is overwritten with the new file

Which built-in functions are used to read a line of text from standard input in Python?

Input & Scan

Scanner

Raw_input & Input (correct)

Scan & Scanner

What is the output of the program 'str = raw_input("Enter your input: "); print 'Received input is : ', str'?

Enter your input: Hello Python Received input is : Hello

None of the mentioned

Enter your input: Hello Python Received input is : Hello Python (correct)

Enter your input: Hello Python Received input is : Python

What is the output of the program 'str = input("Enter your input: "); print 'Received input is : ', str'?

Enter your input:. Signup and view all the answers

When you open a file for writing and the file already exists, what happens?

The existing file is overwritten with the new file Signup and view all the answers

What is the correct way to open a file c:\scores.txt for reading?

Signup and view all the answers

What is the correct way to open a file c:\scores.txt for writing?

outfile = open(“c:\scores.txt”, “w”) Signup and view all the answers

What is the correct way to open a file c:\scores.txt for appending data?

outfile = open(“c:\scores.txt”, “a”) Signup and view all the answers

What does the 'w' indicate when used to open a file?

Writing mode Signup and view all the answers

Which of the following is the correct way to specify a file path in Python?

'C:\textfile.txt' Signup and view all the answers

Which of the following is considered a primitive data type in computer science?

Floating-point numbers Signup and view all the answers

What type of values are almost always associated with primitive data types?

Value types Signup and view all the answers

Which type of operations on primitive data types is usually quite efficient?

Mathematical operations Signup and view all the answers

What is the one-to-one correspondence that primitive data types native to the processor have with objects in the computer's memory?

Direct mapping Signup and view all the answers

Which type of instructions can some processors offer to process sequences of characters with a single instruction?

Specific instructions Signup and view all the answers

What is the purpose of a boolean data type in programming?

To have either the value 'true' or the value 'false' Signup and view all the answers

What does the 'bool' type typically represent in programming languages?

Logical values true or false Signup and view all the answers

Which type of numbers are stored internally in a format equivalent to scientific notation?

Floating-point numbers Signup and view all the answers

What do signed integers allow in their range of values?

Allowing negative values Signup and view all the answers

Which type of data is typically denoted as 'bool' or 'boolean' in programming?

Logical values true or false Signup and view all the answers

Study Notes

File Input/Output

If a file does not exist when opening it for reading, an error occurs
The built-in functions input() and raw_input() are used to read a line of text from standard input in Python
raw_input() is used for Python 2.x, while input() is used for Python 3.x

Program Output

The output of the program str = raw_input("Enter your input: "); print 'Received input is : ', str is the input provided by the user, printed as a string
The output of the program str = input("Enter your input: "); print 'Received input is : ', str is also the input provided by the user, but it evaluates the input as a Python expression (in Python 2.x, use raw_input() for string input)

File Operations

When opening a file for writing and the file already exists, the file is overwritten
To open a file c:\scores.txt for reading, use open('c:\\scores.txt', 'r')
To open a file c:\scores.txt for writing, use open('c:\\scores.txt', 'w')
To open a file c:\scores.txt for appending, use open('c:\\scores.txt', 'a')
The 'w' indicator when used to open a file means the file will be written to, overwriting any existing content

Primitive Data Types

In computer science, primitive data types include integers, floating-point numbers, and characters
Primitive data types are associated with single values
Operations on primitive data types are usually quite efficient
Primitive data types have a one-to-one correspondence with objects in the computer's memory
Some processors offer instructions to process sequences of characters with a single instruction

Boolean Data Type

The purpose of a boolean data type in programming is to represent true or false values
The 'bool' type typically represents true or false values in programming languages
Boolean data types are typically denoted as 'bool' or 'boolean'

Numeric Data Types

Floating-point numbers are stored internally in a format equivalent to scientific notation
Signed integers allow for negative values in their range of values

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Description

Test your knowledge of file handling in Python with this multiple choice quiz. From opening files for reading and writing to understanding file modes, this quiz covers various aspects of file manipulation in Python.