|Board||Central Board of Secondary Education [CBSE]|
|Class||12th / XII|
CBSE Class XII Computer Science Question Bank
Central Board of Secondary Education [CBSE] Class 12th Computer Science Question Bank With Answer Key
Download Class 12th Computer Science Question Bank
|Class & Subjects||Question Bank|
|Class XII Computer Science
CBSE Class XII Computer Science Sample Questions
1. Rohit, a student of class 12th, is learning CSV File Module in Python. During examination, he has been assigned an incomplete python code (shown below) to create a CSV File ‘Student.csv’ (content shown below). Help him in completing the code which creates the desired CSV File.
fh = open(_____, _____, newline=”) #Statement-2
stuwriter = csv._____ #Statement-3
data = 
header = [‘ROLL_NO’, ‘NAME’, ‘CLASS’, ‘SECTION’]
for i in range(5):
roll_no = int(input(“Enter Roll Number : “))
name = input(“Enter Name : “)
Class = input(“Enter Class : “)
section = input(“Enter Section : “)
rec = [_____] #Statement-4
stuwriter. _____ (data) #Statement-5
2. Identify the suitable code for blank space in line marked as Statement-1.
a) csv file
Correct Answer : c) csv
ii. Identify the missing code for blank space in line marked as Statement-2?
Correct Answer : b) “Student.csv”,”w”
iii. Choose the function name (with argument) that should be used in the blank space of line marked as Statement-3
Correct Answer : c) writer(fh)
iv. Identify the suitable code for blank space in line marked as Statement-4.
a) ‘ROLL_NO’, ‘NAME’, ‘CLASS’, ‘SECTION’
b) ROLL_NO, NAME, CLASS, SECTION
d) roll_no,name,Class,sectionc) co.connect()
Correct Answer : d) roll_no,name,Class,section
v. Choose the function name that should be used in the blank space of line marked as Statement-5 to create the desired CSV File?
Correct Answer : c) writerows()
2. Amritya Seth is a programmer, who has recently been given a task to write a python code to perform the following binary file operations with the help of two user defined functions/modules:
a. AddStudents() to create a binary file called STUDENT.DAT containing student information – roll number, name and marks (out of 100) of each student.
b. GetStudents() to display the name and percentage of those students who have a percentage greater than 75. In case there is no student having percentage > 75 the function displays an appropriate message. The function should also display the average percent.
He has succeeded in writing partial code and has missed out certain statements, so he has left certain queries in comment lines. You as an expert of Python have to provide the missing statements and other related queries based on the following code of Amritya.
Answer any four questions (out of five) from the below mentioned questions.
____________ #1 statement to open the binary file to
Rno = int(input(“Rno :”))
Name = input(“Name : “)
Percent = float(input(“Percent :”))
L = [Rno, Name, Percent]
____________ #2 statement to write the list L
into the file
Choice = input(“enter more (y/n): “)
if Choice in “nN”:
with open(“STUDENT.DAT”,”rb”) as F:
____________ #3 statement to read
from the file
if R > 75:
print(R, ” has percent =
print(“There is no student who has
percentage more than 75″)
print(“average percent of class = “,average)
i. Which of the following commands is used to open the file “STUDENT.DAT” for writing only in binary format? (marked as #1 in the Python code)
a. F= open(“STUDENT.DAT”,’wb’)
b. F= open(“STUDENT.DAT”,’w’)
c. F= open(“STUDENT.DAT”,’wb+’)
d. F= open(“STUDENT.DAT”,’w+’)
Correct Answer : a. F= open(“STUDENT.DAT”,’wb’)
ii. Which of the following commands is used to write the list L into the binary file, STUDENT.DAT? (marked as #2 in the Python code)
b. pickle.write(f, L)
Correct Answer : c. pickle.dump(L,F)
iii. Which of the following commands is used to read each record from the binary file STUDENT.DAT? (marked as #3 in the Python code)
a. R = pickle.load(F)
c. r= pickle.read(f)
Correct Answer : a. R = pickle.load(F)
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