Computer Science Class 12

Teachers and Examiners (CBSESkillEduction) collaborated to create the MCQ on Data Visualization in Python Class 12. All the important Information are taken from the NCERT Textbook Computer Science (083) class 12.

MCQ on Data Visualization in Python Class 12

1. _________ basically refers to the graphical or visual representation of information and data using visual elements like chart, graphs, and maps etc.
a. Data Visualization
b. Matplotlib
c. PyPlot
d. None of the above

2. _________ is a Python library that provided many interfaces and functionality for 2D-graphics.
a. Data Visualization
b. Matplotlib
c. PyPlot
d. None of the above

3. __________ is a collection of mathods within matplotlib which allow user to construct 2D plots easily and interactively.
a. Data Visualization
b. Matplotlib
c. PyPlot
d. None of the above

4. In order to use PyPlot on your computers for data visulization, you need to first import it in your Python environment by issuing _________ command for matplotlib pyplot.
a. Insert
b. Import
c. Retrive
d. None of the above

5. _________ is a Python library that offer many functions for creating and manipulating arrays, which come handy while plotting.
a. NumPy
b. Matplotlib
c. PyPlot
d. None of the above

6. NumPy arrary are also called ________.
a. MatArrarys
b. NdArrays
c. NumPyArrays
d. None of the above

7. Which type of chart are available in data visulization.
a. Line chart
b. bar chart
c. Pie chart & Scatter chart
d. All of the above

8. ________ is a type of chart which displays information as a series of data points called ‘markers’ connected by straight line segments.
a. Line chart
b. Line graph
c. Both a) and b)
d. None of the above

9. You can create line charts by using PyPlot’s _______ fucntion
a. Myplot()
b. Plot()
c. Both a) and b)
d. None of the above

10. You can change line color, width, line-style, marker-type using ________ function.
a. Myplot()
b. Plot()
c. Both a) and b)
d. None of the above

11. A _________ is a graphical display of data using bars of different heights.
a. Bar Graph or Bar Chart
b. Line Chart
c. Pie Chart
d. None of the above

12. You can create a bar chart using pyplot’s ________ function.
a. pie()
b. bar()
c. line()
d. None of the above

13. You can change colors of the bars, widths of the bars in ________ function.
a. bar()
b. pie()
c. line()
d. None of the above

14. The _________ is a type of graph in which a circle is diveded into sectors that each represent a proporation of the whole.
a. Pie chart
b. Bar chart
c. Line chart
d. None of the above

15. By default, the pie chart is _________ in shaper but you can change to circular shaper by giving command.
a. Oval
b. Square
c. Circle
d. All of the above

16. The axes can be labelled using _________ and _________ function.
a. xlabel() and ylabel()
b. labelx() and labely()
c. Both a) and b)
d. None of the above

17. The tick marks for axes values can be defined using _______ and ________ functions.
a. ticks() and ticks()
b. xticks() and yticks()
c. ticksx() and ticksy()
d. None of the above

18. Using __________ function, one can add legends to a plot where multiple data ranges have been plotted, but before that the data ranges must have their label argument defined in plot() or bar() function.
a. legend()
b. legends()
c. leg()
d. None of the above

Computer Science Class 12 Notes

1. Python Revision tour – 1 Class 12 Notes
2. Python Revision tour – 2 Class 12 Notes Notes
3. Working with Functions Class 12 Notes
4. Using Python Libraries Class 12 Notes
5. File Handling Class 12 Notes
6. Recursion Class 12 Notes
7. Idea of Algorithmic Efficiency Class 12 Notes
8. Data Visualization using Pyplot Class 12 Notes
9. Data Structure Class 12 Notes
10. Computer Network Class 12 Notes
11. More on MySQL Class 12 Notes

MCQ for Class 12 Computer Science Python

1. Python Revision tour – 1 Class 12 MCQs
2. Python Revision tour – 2 Class 12 MCQs
3. Working with Functions Class 12 MCQs
4. Using Python Libraries Class 12 MCQs
5. File Handling Class 12 MCQs
6. Recursion Class 12 MCQs
7. Data Visualization using Pyplot Class 12 MCQs
8. Data Structure Class 12 MCQs
9. Computer Network Class 12 MCQs
10. More on MySQL Class 12 MCQs

Computer Science Class 12 Questions and Answers

1. Python Revision tour – 1 Class 12 Questions and Answers
2. Working with Functions Class 12 Questions and Answers
3. Using Python Libraries Class 12 Questions and Answers
4. File Handling Class 12 Questions and Answers
5. Recursion Class 12 Questions and Answers
6. Idea of Algorithmic Efficiency Class 12 Questions and Answers
7. Data Structure Class 12 Questions and Answers
8. More on MySQL Class 12 Questions and Answers
9. Computer Network Class 12 Questions and Answers
10. More on MySQL Class 12 Questions and Answers 

Teachers and Examiners (CBSESkillEduction) collaborated to create the Idea of Algorithm Efficiency in Python Class 12 Solutions. All the important Information are taken from the NCERT Textbook Computer Science (083) class 12.

Idea of Algorithm Efficiency in Python Class 12 Solutions

1. An ___________ is a sufficiently precise method or procedur for accomplishing a specific tast, which can be programmed on computer.
a. Algorithm 
b. Complexity
c. Big-O
d. None of the above

2. ________ referes to the measure of the performace of an algorithm.
a. Algorithm
b. Complexity 
c. Big-O
d. None of the above

3. __________ can be related to time (temporal complexity) or to space (space complexity).
a. Algorithm
b. Complexity 
c. Big-O
d. None of the abve

4. ________ notation is used to depict an algorithm’s growth rate i.e. change in algorithm performance when its input size grows.
a. Algorithm
b. Complexity
c. Big-O 
d. None of the abve

5. __________ term is the one which affects the most, an algorithm’s performance.
a. Algorithm
b. Complexity
c. Big-O
d. Dominant 

6. Only the ________ term is inclued in Big-O notation.
a. Algorithm
b. Complexity
c. Big-O
d. Dominant 

7. The Worst case complexity provides an _________ on running time.
a. Upper-bound 
b. Lower-bound
c. Middle-bound
d. All of the above

8. ___________ complexity provieds expected running time.
a. Algorithm
b. Complexity
c. Best-Case
d. Average-Case 

9. _________ complxity provides the time of optimal performace.
a. Algorithm
b. Complexity
c. Best-Case 
d. Average-Case

10. Define Big ‘O’ notation. State the two factors which determine the complexity of an algorithm.
Answer – Big O notation, which provides the measurement of the time while an algorithm operates with the worst input it can receive, typically specifies the worst case complexity. The two factors that affect an algorithm’s complexity are time and space.

11. Distinguish between worst-case and best-case complexity of an algorithm.
Answer – The function with the fewest steps taken on input data with n elements is the best case. The worst-case scenario is the function that goes through the most steps with input data of size n. The function that goes through the most steps on input data with n elements is called the average case.

12. What is an algorithm? What do you understand by alogrithm performance?
Answer – A set of instructions called an algorithm is what a computer must follow in order to conduct calculations or other problem-solving tasks. A formal definition of an algorithm is that it is a finite set of instructions that are carried out in a particular order to complete a specified task.

13. What is computationl complexity?
Answer – The task is to determine how many times each letter appears in an N-letter string. The entire string is iterated over by a crude algorithm once for each potential letter. The procedure is linear in N since the size of the alphabet is fixed

14. Is linear search or binary search faster?
Answer – When compared to a linear search, a binary search is faster in finding an element. In contrast to linear search, which works with both sorted and unsorted arrays, binary search just requires that an array be in sorted order.

15. Which factors affect an algorithm’s performance?
Answer – One of the most important factors in assessing an algorithm’s potential is speed. The effectiveness of an algorithm is also affected by other elements including usability, security, maintainability, and utilisation space. Complexity measures for space and time are used to assess parameters.

16. Which complexity is more O(n) or O(log n)?
Answer – An algorithm of O(n) will execute steps proportional to n for an input of size n, while an algorithm of O(log(n)) will execute steps roughly log(n). Since log(n) is obviously smaller than n, an algorithm with an O(log(n)) complexity is preferable.

17. What are different types of complexities that are considered?
Answer – The complexity can take on any shape, including linear, n*log(n), quadratic, cubic, exponential, and more. It is nothing more than the number of steps necessary to complete a specific algorithm, whether they are constant, logarithmic, linear, or another type.

18. What do you understand by Big-O notation? What is its significance?
Answer – Big O Notation is a technique for expressing how time-consuming an algorithm is. As the input increases, it calculates how long it will take to perform an algorithm. In other words, it determines an algorithm’s worst-case time complexity. The maximum runtime of an algorithm is expressed using the Big O Notation in data structures.

19. What do you understand by best-case, worst-case and average-case complexitites? When are they considered?
Answer – The function with the fewest steps taken on input data with n elements is the best case. The worst-case scenario is the function that goes through the most steps with input data of size n. The function that goes through the most steps on input data with n elements is called the average case.

Computer Science Class 12 Notes

1. Python Revision tour – 1 Class 12 Notes
2. Python Revision tour – 2 Class 12 Notes Notes
3. Working with Functions Class 12 Notes
4. Using Python Libraries Class 12 Notes
5. File Handling Class 12 Notes
6. Recursion Class 12 Notes
7. Idea of Algorithmic Efficiency Class 12 Notes
8. Data Visualization using Pyplot Class 12 Notes
9. Data Structure Class 12 Notes
10. Computer Network Class 12 Notes
11. More on MySQL Class 12 Notes

MCQ for Class 12 Computer Science Python

1. Python Revision tour – 1 Class 12 MCQs
2. Python Revision tour – 2 Class 12 MCQs
3. Working with Functions Class 12 MCQs
4. Using Python Libraries Class 12 MCQs
5. File Handling Class 12 MCQs
6. Recursion Class 12 MCQs
7. Data Visualization using Pyplot Class 12 MCQs
8. Data Structure Class 12 MCQs
9. Computer Network Class 12 MCQs
10. More on MySQL Class 12 MCQs

Computer Science Class 12 Questions and Answers

1. Python Revision tour – 1 Class 12 Questions and Answers
2. Working with Functions Class 12 Questions and Answers
3. Using Python Libraries Class 12 Questions and Answers
4. File Handling Class 12 Questions and Answers
5. Recursion Class 12 Questions and Answers
6. Idea of Algorithmic Efficiency Class 12 Questions and Answers
7. Data Structure Class 12 Questions and Answers
8. More on MySQL Class 12 Questions and Answers
9. Computer Network Class 12 Questions and Answers
10. More on MySQL Class 12 Questions and Answers 

Teachers and Examiners (CBSESkillEduction) collaborated to create the Recursion in Python Class 12 Questions and Answers. All the important Information are taken from the NCERT Textbook Computer Science (083) class 12.

Recursion in Python Class 12 Questions and Answers

1. What is recursion?
Answer – Python also permits function recursion, allowing defined functions to call one another. A frequent idea in math and programming is recursion. It denotes that a function makes a call to itself. This has the advantage of allowing you to loop through data to arrive at a conclusion.

2. What are base case and recursive case?
Answer – Recursive functions are ones that make calls to themselves. The base case and the recursive case are its two main components. The prerequisite for stopping the recursion is the base case. When a function calls on itself, it is said to be in a recursive case.

3. Why is base case so important in a recursive function?
Answer – The basic case of a suitable recursive function must always exist: A method of returning without performing a recursive call is the basic case. In other words, it is the mechanism that puts an end to this cycle of recursive calls that keep getting bigger and bigger while a stack of function calls waits for other function calls to return.

4. When does infinite recursion occur?
Answer – A recursion will continue to make recursive calls indefinitely if it never hits a base case, and the programme will never come to an end. This is referred to as infinite recursion, and it is typically not recommended. A programme with infinite recursion won’t typically run forever in most programming environments.

5. Compare iteration and recursion.
Answer – Iteration and recursion are two alternative approaches to repeatedly carrying out a set of instructions. The key distinction between the two is that whereas in iteration we use loops like “for” and “while,” in recursion we utilise function calls to continually execute the statements inside the function body.

Computer Science Class 12 Notes

1. Python Revision tour – 1 Class 12 Notes
2. Python Revision tour – 2 Class 12 Notes Notes
3. Working with Functions Class 12 Notes
4. Using Python Libraries Class 12 Notes
5. File Handling Class 12 Notes
6. Recursion Class 12 Notes
7. Idea of Algorithmic Efficiency Class 12 Notes
8. Data Visualization using Pyplot Class 12 Notes
9. Data Structure Class 12 Notes
10. Computer Network Class 12 Notes
11. More on MySQL Class 12 Notes

MCQ for Class 12 Computer Science Python

1. Python Revision tour – 1 Class 12 MCQs
2. Python Revision tour – 2 Class 12 MCQs
3. Working with Functions Class 12 MCQs
4. Using Python Libraries Class 12 MCQs
5. File Handling Class 12 MCQs
6. Recursion Class 12 MCQs
7. Data Visualization using Pyplot Class 12 MCQs
8. Data Structure Class 12 MCQs
9. Computer Network Class 12 MCQs
10. More on MySQL Class 12 MCQs

Computer Science Class 12 Questions and Answers

1. Python Revision tour – 1 Class 12 Questions and Answers
2. Working with Functions Class 12 Questions and Answers
3. Using Python Libraries Class 12 Questions and Answers
4. File Handling Class 12 Questions and Answers
5. Recursion Class 12 Questions and Answers
6. Idea of Algorithmic Efficiency Class 12 Questions and Answers
7. Data Structure Class 12 Questions and Answers
8. More on MySQL Class 12 Questions and Answers
9. Computer Network Class 12 Questions and Answers
10. More on MySQL Class 12 Questions and Answers 

Teachers and Examiners (CBSESkillEduction) collaborated to create the Recursion in Python Class 12 MCQ. All the important Information are taken from the NCERT Textbook Computer Science (083) class 12.

Recursion in Python Class 12 MCQ

1. A function is said to be __________ if it calls itself.
a. Recursive
b. Calling function
c. Default function
d. None of the above

2. There are two cases in each recursive functions – the __________ case and the ________ case.
a. Recursive case and base case
b. Default case and Recursive case
c. Base case and Default case
d. None of the above

3. The _________ case is the case whose solution is pre-known and is used without computation.
a. Default case
b. Recursive case
c. Base case
d. None of the above

4. The ___________ case is more general case of problem, which is being solved.
a. Default case
b. Recursive case
c. Base case
d. None of the above

5. An __________ recursion is when a recursive function calls its self endlessly.
a. Default case
b. Recursive case
c. Base case
d. Infinite Recursive

6. If there is no __________, or if the _________ is never executed, infinite recursion occurs.
a. Default case
b. Recursive case
c. Base case
d. Infinite Recursive

7. ____________ uses some memory space for each pass contrary to recursion where fresh memory is allocated for each successive call.
a. Iteration
b. Recursive case
c. Base case
d. Infinite Recursive

8. ________ function are relatively slower than theier eterative counterparts.
a. Iteration
b. Recursive
c. Successive
d. None of the above

9. Some commonly used recursive algorithms are _________ .
a. Factorial & GCD
b. Fibonacci Series
c. Binary Search
d. All of the above

Computer Science Class 12 Notes

1. Python Revision tour – 1 Class 12 Notes
2. Python Revision tour – 2 Class 12 Notes Notes
3. Working with Functions Class 12 Notes
4. Using Python Libraries Class 12 Notes
5. File Handling Class 12 Notes
6. Recursion Class 12 Notes
7. Idea of Algorithmic Efficiency Class 12 Notes
8. Data Visualization using Pyplot Class 12 Notes
9. Data Structure Class 12 Notes
10. Computer Network Class 12 Notes
11. More on MySQL Class 12 Notes

MCQ for Class 12 Computer Science Python

1. Python Revision tour – 1 Class 12 MCQs
2. Python Revision tour – 2 Class 12 MCQs
3. Working with Functions Class 12 MCQs
4. Using Python Libraries Class 12 MCQs
5. File Handling Class 12 MCQs
6. Recursion Class 12 MCQs
7. Data Visualization using Pyplot Class 12 MCQs
8. Data Structure Class 12 MCQs
9. Computer Network Class 12 MCQs
10. More on MySQL Class 12 MCQs

Computer Science Class 12 Questions and Answers

1. Python Revision tour – 1 Class 12 Questions and Answers
2. Working with Functions Class 12 Questions and Answers
3. Using Python Libraries Class 12 Questions and Answers
4. File Handling Class 12 Questions and Answers
5. Recursion Class 12 Questions and Answers
6. Idea of Algorithmic Efficiency Class 12 Questions and Answers
7. Data Structure Class 12 Questions and Answers
8. More on MySQL Class 12 Questions and Answers
9. Computer Network Class 12 Questions and Answers
10. More on MySQL Class 12 Questions and Answers 

Teachers and Examiners (CBSESkillEduction) collaborated to create the File Handling in Python Class 12 NCERT Solutions. All the important Information are taken from the NCERT Textbook Computer Science (083) class 12.

File Handling in Python Class 12 NCERT Solutions

1. Differentiate between:
a) text file and binary file
Answer – Data files primarily come in two flavours: text files and binary files. Any text editor can open a text file since it is made up of characters that are human readable. Binary files, on the other hand, contain non-human readable characters and symbols and need special software to retrieve its information.

b) readline() and readlines()
Answer – When called, the readline() function in Python returns a line from the file. The readlines() method will return every line in a file as a list with each item representing a line in the file.

c) write() and writelines()
Answer – A string is passed as an argument to the write() method, which writes it to a text file. To write several strings to a file, use the writelines() method. To use the writelines() method, we must supply an iterable object (such as a list, tuple, etc.) that contains strings.

2. Write the use and syntax for the following methods:
a) open()
Answer – open(file_name, mode)
b) read()
Answer – file_object.read()
c) seek()
Answer – f.seek(offset, from_what)
d) dump()
Answer – dump(data_object, file_object)

3. Write the file mode that will be used for opening the following files. Also, write the Python statements to open the following files:
a) a text file “example.txt” in both read and write mode
b) a binary file “bfile.dat” in write mode
c) a text file “try.txt” in append and read mode
d) a binary file “btry.dat” in read only mode.
Answer –
a) file = open( “example.txt”, “w+” )
b)file = open(“bfile.dat” , “wb” )
c) file = open ( “try.txt” , “a+” )
d) file = open( “btry.dat” , “rb” )

4. Why is it advised to close a file after we are done with the read and write operations? What will happen if we do not close it? Will some error message be flashed?
Answer – As Python ensures that any unwritten or unsaved data is flushed off (written to the file) before the file is closed, the main reason to close a file after read and write operations is to prevent the application from slowing down. So, once we’re done with it, it’s always a good idea to close the file.

5. What is the difference between the following set of statements (a) and (b):
a) P = open(“practice.txt”,”r”)
P.read(10)
b) with open(“practice.txt”, “r”) as P:
x = P.read()
Answer – File P will read 10 characters in part “a” but won’t print anything; in part “b,” however, it will read every character in the practise file and save it in the variable “x.”

6. Write a command(s) to write the following lines to the text file named hello.txt. Assume that the file is opened in append mode.
“ Welcome my class”
“It is a fun place”
“You will learn and play”
Answer –
f = open(“hello.txt”,”a”)
f.write(“Welcome my class”)
f.write(“It is a fun place”)
f.write(“You will learn and play”)
f.close()

7. Write a Python program to open the file hello.txt used in question no 6 in read mode to display its contents. What will be the difference if the file was opened in write mode instead of append mode?
Answer –
f = open(“hello.txt”,”r”)
x = f.read()
print(x)

8. Write a program to accept string/sentences from the user till the user enters “END” to. Save the data in a text file and then display only those sentences which begin with an uppercase alphabet.
Answer –
f = open(“example.txt”,”w”)
while True :
sen = input(“Enter something ( Enter END for quit ) :-“)
if sen == “END” :
break
else :
f.write(sen + “\n”)
f.close()
print()
print(“Lines started with Capital letters :-“)
f = open(“example.txt”,”r”)
print()
data = f.readlines()
for i in data :
if i[0].isupper() :
print(i)
f.close()

9. Define pickling in Python. Explain serialization and deserialization of Python object.
Answer – When serialising and deserializing a Python object structure, pickle is primarily employed. It involves transforming a Python object into a byte stream in order to store it in a file or database, keep programme state consistent across sessions, or send data over the network.

10. Write a program to enter the following records in a binary file:
Item No integer
Item_Name string
Qty integer
Price float
Number of records to be entered should be accepted from the user. Read the file to display the records in the following format:
Item No:
Item Name :
Quantity:
Price per item:
Amount: ( to be calculated as Price * Qty
Answer –
import pickle

file = open(“Pathwalla.dat”,”wb”)

while True :
dic = { }
Item_No = int(input(“Enter Item no.”))
Item_Name = input(“Enter Item name :-“)
Qty = int(input(“Enter Quantity :- “))
Price = float(input(“Enter price :-“))

dic[ “Item_No” ] = Item_No
dic[ “Item_Name” ] = Item_Name
dic[ “Qty” ] = Qty
dic[ “Price” ] = Price
pickle.dump( dic , file )
print()
ans = input(“Do you want to quit Enter [ Y/N ] :-“)
if ans == “y” or ans == “Y” :
break
print()

file.close()
print()
file = open(“Pathwalla.dat”,”rb”)

try :
while True :
dic = pickle.load(file)
print( “Item No. :”,”\t”, dic[ “Item_No” ] )
print( “Item Name :”,”\t”, dic[ “Item_Name” ] )
print( “Quantity :”,”\t”, dic[ “Qty” ] )
print( “Price of one :”,”\t”,dic[ “Price” ] )
print( “Amount :”, “\t” , dic[ “Qty” ] * dic[ “Price” ] )
print()
except :
file.close()

Computer Science Class 12 Notes

1. Python Revision tour – 1 Class 12 Notes
2. Python Revision tour – 2 Class 12 Notes Notes
3. Working with Functions Class 12 Notes
4. Using Python Libraries Class 12 Notes
5. File Handling Class 12 Notes
6. Recursion Class 12 Notes
7. Idea of Algorithmic Efficiency Class 12 Notes
8. Data Visualization using Pyplot Class 12 Notes
9. Data Structure Class 12 Notes
10. Computer Network Class 12 Notes
11. More on MySQL Class 12 Notes

MCQ for Class 12 Computer Science Python

1. Python Revision tour – 1 Class 12 MCQs
2. Python Revision tour – 2 Class 12 MCQs
3. Working with Functions Class 12 MCQs
4. Using Python Libraries Class 12 MCQs
5. File Handling Class 12 MCQs
6. Recursion Class 12 MCQs
7. Data Visualization using Pyplot Class 12 MCQs
8. Data Structure Class 12 MCQs
9. Computer Network Class 12 MCQs
10. More on MySQL Class 12 MCQs

Computer Science Class 12 Questions and Answers

1. Python Revision tour – 1 Class 12 Questions and Answers
2. Working with Functions Class 12 Questions and Answers
3. Using Python Libraries Class 12 Questions and Answers
4. File Handling Class 12 Questions and Answers
5. Recursion Class 12 Questions and Answers
6. Idea of Algorithmic Efficiency Class 12 Questions and Answers
7. Data Structure Class 12 Questions and Answers
8. More on MySQL Class 12 Questions and Answers
9. Computer Network Class 12 Questions and Answers
10. More on MySQL Class 12 Questions and Answers 

Teachers and Examiners (CBSESkillEduction) collaborated to create the File Handling in Python Class 12 MCQ. All the important Information are taken from the NCERT Textbook Computer Science (083) class 12.

File Handling in Python Class 12 MCQ

1. A text file stores information is __________ characters.
a. ASCII
b. Unicode
c. Both a) and b) 
d. None of the above

2. In text files, each line of text is terminated, with a special character known as ___________.
a. EOL 
b. EOF
c. EEF
d. All of the above

3. Which one of the following is correct for carriage-return and newline combination.
a. \r\n 
b. /r/n
c. \r/n
d. /r\n

4. A _________ file is just a file that contains information in the same format in which the information is held in memory.
a. Text file
b. Binary file 
c. Word file
d. None of the above

File Handling in Python Class 12 MCQ

5. _________file format are faster and easier for a prgram to read and write than other file format.
a. Text file
b. Binary file 
c. Doc file
d. None of the above

6. The command for opening a file in Python file handling is ____________.
a. open() 
b. update()
c. both a) and b)
d. None of the above

7. The command for closing a file in Python file handling is ____________.
a. close() 
b. closing()
c. object()
d. None of the above

8. _________ text file mode is used to read data from file.
a. ‘r’
b. ‘rb’
c. ‘r+’
d. None of the above

9. _________ text file mode is used to apped data in the file using file handling.
a. ‘w’
b. ‘ab’
c. ‘a’ 
d. None of the above

File Handling in Python Class 12 MCQ

10. _________ binary file mode is used to append data in the file using file handling.
a. ‘ab’ 
b. ‘w’
c. ‘a’
d. None of the above

11. Which of the following option is correct for ‘a+’ text file mode.
a. File is create if does not exit
b. If file exist, file’s existing data is retained; new data is appended
c. Both reading and writing operation can take palce.
d. All of the above 

12. ___________ function is used to read the data from the file.
a. read()
b. readline()
c. readlines()
d. All of the above 

13. Which function is used to write data onto a file.
a. write()
b. writelines()
c. Both a) and b) 
d. None of the above

14. Python holds everything to write in the file in buffer. if you want to force python to write the contents of buffer onto storage, you can use ________ function.
a. flush() 
b. push()
c. clear()
d. None of the above

File Handling in Python Class 12 MCQ

15. Which function is used to remove whitespace after reading a file in file handling.
a. write()
b. read()
c. strip() 
d. None of the above

16. _________ removes the given character from trailing end or from the right end.
a. strip()
b. rstrip() 
c. lstrip()
d. None of the above

17. A text file can be opened in ________ file modes.
a. ‘r’ and ‘w’
b. ‘a’ and ‘r+’
c. ‘w+’ and ‘a+’
d. All of the above 

18. A binary file can be opend in ________ file mode.
a. ‘rb’ and ‘wb’
b. ‘ab’ and ‘r+b’
c. (‘rb+’), ‘w+b'(wb+’), ‘a+b'(‘ab+’)
d. All of the above 

19. ________ are the standard streams in file handling.
a. stdin (standard input)
b. stdout (standard output)
c. stderr (standard error)
d. All of the above 

File Handling in Python Class 12 MCQ

20. The input and output devices are implemented as file, also called __________.
a. Standard streams 
b. Standard Binary
c. Standar Text
d. None of the above

21. In python directory denonted as a dot(.) while its parent directory is denoted with ________.
a. Three dots(…)
b. Two dots(..) 
c. Both a) and b)
d. None of the above

Computer Science Class 12 Notes

1. Python Revision tour – 1 Class 12 Notes
2. Python Revision tour – 2 Class 12 Notes Notes
3. Working with Functions Class 12 Notes
4. Using Python Libraries Class 12 Notes
5. File Handling Class 12 Notes
6. Recursion Class 12 Notes
7. Idea of Algorithmic Efficiency Class 12 Notes
8. Data Visualization using Pyplot Class 12 Notes
9. Data Structure Class 12 Notes
10. Computer Network Class 12 Notes
11. More on MySQL Class 12 Notes

MCQ for Class 12 Computer Science Python

1. Python Revision tour – 1 Class 12 MCQs
2. Python Revision tour – 2 Class 12 MCQs
3. Working with Functions Class 12 MCQs
4. Using Python Libraries Class 12 MCQs
5. File Handling Class 12 MCQs
6. Recursion Class 12 MCQs
7. Data Visualization using Pyplot Class 12 MCQs
8. Data Structure Class 12 MCQs
9. Computer Network Class 12 MCQs
10. More on MySQL Class 12 MCQs

Computer Science Class 12 Questions and Answers

1. Python Revision tour – 1 Class 12 Questions and Answers
2. Working with Functions Class 12 Questions and Answers
3. Using Python Libraries Class 12 Questions and Answers
4. File Handling Class 12 Questions and Answers
5. Recursion Class 12 Questions and Answers
6. Idea of Algorithmic Efficiency Class 12 Questions and Answers
7. Data Structure Class 12 Questions and Answers
8. More on MySQL Class 12 Questions and Answers
9. Computer Network Class 12 Questions and Answers
10. More on MySQL Class 12 Questions and Answers