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class 12 computer science practical paper with solution 2023

AISSCE Practical Examination 2021

COMPUTER SCIENCE (083)

Time : 3 Hours M.M. 30

Q1. 8

(i) Write a user defined function countvowels() in Python to count and display the number of vowels in a text file “data.txt”.
(ii) A binary file “employee.dat” has structure [Empid, EName, Designation ].
a) Write a user defined function Create() to input data for a record and add it to employee.dat .
b) Write a user defined function Display() in Python to display those records from “employee.dat” where Empid is more than 101.

Q2. 4

The code given below inserts the following record in the table Student:

RollNo – integer
Name – string
Clas – integer
Marks – integer
Note the following to establish connectivity between Python and MYSQL:

Username is root
Password is root
The table exists in a MYSQL database named school.
The details (RollNo, Name, Clas and Marks) are to be accepted from the

Write the following missing statements to complete the code: 2+3

Statement 1 – to form the cursor object
Statement 2 – to execute the command that inserts the record in the table Student.
Statement 3- to add the record permanently in the database
Statement 4- to close the database connection.

import mysql.connector as mysql
def sql_data():
con1=mysql.connect(host=”localhost”,user=”root”, password=”root”, database=”school”)
mycursor= #Statement 1
RollNo=int(input(“Enter Roll Number :: “))
Name=input(“Enter name :: “)
Cas=int(input(“Enter class :: “))
Marks=int(input(“Enter Marks :: “))
querry=”insert into student values({},'{}’,{},{})”.format(rno,name,clas,marks)
____________________________ #Statement 2
_____________________________ # Statement 3
print(“Data Added successfully”)

____________________________ #Statement 4

Q3.Practical File 7

Q4.Project File 8

Q5.Viva-Voce 3

Solution:

def countvowels():
f=open(“data.txt”,”r”)
count=0
data=f.read()
for d in data:
if d in [‘a’,’e’,’i’,’o’,’u’]:
count+=1
f.close()

print(‘Number of vowels=’,count)

(a) import pickle

def Create():
    f=open(“employee.dat”,”ab”)
Empid=int(input(“Enter Empid: “))
EName=input(“Enter Name of employee:”)
Designation = input(“Enter Designation: “)
    record=[Empid, EName,Designation]
    pickle.dump(record, f)
    f.close()

(b)

def Display():
    f=open(“employee.dat”,”rb”)
    try:
        while True:
            record=pickle.load(f)
if record[0]>101:
print(record)
    except:
        f.close()