CUET Level - II Computer Science(7/11/2023)
Authored by Bodhi School
Computers
12th Grade
Used 5+ times
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15 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following is a function/method of the pickle module?
reader( )
writer( )
load ( )
read( )
Answer explanation
Explanation: The load () method of python pickle module reads the pickled byte
stream of one or more python objects from a file object. When multiple objects
are expected from the byte steam, the load() method should be called multiple
times.
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following statement is not correct?
We can write content into a text file opened using ’w’ mode.
We can write content into a text file opened using ‘w+’ mode.
We can write content into a text file opened using ‘r ‘ mode.
We can write content into a text file opened using ‘r+’ mode.
Answer explanation
opens the file in read-only mode. So, we can’t write any data to
the file.
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
3. Which of the following option is the correct Python statement to read and display the first 10 characters of a text file “ Notes.txt”?
(a) F= open(‘Notes.txt’); print(F.load(10))
F= open(‘Notes.txt’); print(F.dump(10))
F= open(‘Notes.txt’); print(F.read(10))
F= open(‘Notes.txt’); print(F.write(10))
Answer explanation
read() method in python is used to read at most n bytes from the
file associated with the given file descriptor. If the end of the file has been
reached while reading bytes from the given file descriptor, os.read() method will
return an empty bytes object for all bytes left to be read.
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following is not a correct python statement to open a text file
“Notes.txt” to write content onto it?
F= open(‘Notes.txt’, ‘w’)
F= open(‘Notes.txt’, ‘a’)
F= open(‘Notes.txt’, ‘A+’)
F= open(‘Notes.txt’, ‘w’+)
Answer explanation
Option C is invalid because ‘A ‘ is an invalid mode in python.
‘w’ opens a file for write mode.
‘a’ opens a file for append mode.
‘w+’ opens a file for both writing and reading.
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A text file opened using following statement:
MyFile= open(‘Notes.txt’)
Which of the following is the correct python statement to close it?
MyFile= close(‘Notes.txt’)
MyFile= close(‘Notes.txt’)
Close.MyFile()
MyFile.close()
Answer explanation
Python file method close() closes the opened file. Its syntax is
<file object>.close()
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following option is the correct usage for the tell( ) of a file object?
It places the file pointer at the desired offset in a file.
It returns the entire content of a file.
It returns the byte position of the file pointer as an integer.
It tells the details about the file.
Answer explanation
tell() method can be used to get the position of File Handle. tell()
method returns current position of file object. This method takes no parameters
and returns an integer value. Initially file points to the beginning of the file (if not
opened in append mode).
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following statement is incorrect in the context of pickled binary
file?
csv module is used for reading and writing objects in binary files.
pickle module is used for reading and writing objects in binary file.
load () of the pickle module is used to rad objects.
dump() of the pickle module is used to write objects.
Answer explanation
The csv module implements classes to rad and write tabular data in
CSV format. CSV files are text files so csv module can’t be used to read and write
objects to binary files.
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