Download Sample Paper 2022-23 Computer Science Class 12 Very important

In this article, I am going to discuss Term 1 Sample paper 2022-23 Computer Science Class 12 with a new pattern. You can download a few question papers for the same. So let’s begin!

Sample paper 2022-23 Computer Science Class 12

CBSE has released a circular dated 20.05.2022 wide circular no. 57 for assessment and evaluation practices of the board for session 2022-23.

The Board is initiating further corresponding changes in the Examination and Assessment practices for the year 2022-23 to align assessment to Competency-Based Education. Therefore, in the forthcoming sessions, a greater number of Competency Based Questions or questions that assess the application of concepts in real-life/ unfamiliar situations will be part of the question paper.

New changes for Sample paper 2022-23 Computer Science Class 12 XII (2022-23)

The changes for Sample paper 2022-23 Computer Science Class 12 XII (2022-23) internal year-end/Board Examination are as detailed:

Theory Exam

Board examination (Theory)	Existing (2021-22)	Modified (Annual Scheme 2022-23)
Composition	Term I – Multiple Choice Question including case-based and assertion reasoning type MCQs – 100% ( 20% questions competency-based) Term II – Case-based/ Situation based, Open-ended- short answer/long answer (20% questions competency-based)	Competency Based Questions would be minimum 30%. These can be in the form of Multiple Choice Questions, Case based Questions, Source-based Integrated Questions or any other types. Objective Type Questions will be 20% Remaining 50% Short Answer/Long Answer Questions (as per existing pattern)

Internal Assessment

There is no change in internal assessment and it is the same as prescribed in the CBSE curriculum document released via board vide circular no. 50/2022 on 28th April 2022.

Instructions for paper

Here are the general instructions for Sample paper 2022-23 Computer Science Class 12 as given below:

• This question paper contains five sections, sections A to E.
• All questions are compulsory.
• Section A has 18 questions carrying 01 mark each.
• Section B has 07 Very Short Answer type questions carrying 02 marks each.
• Section C has 05 Short Answer type questions carrying 03 marks each.
• Section D has 03 Long Answer type questions carrying 05 marks each.
• Section E has 02 questions carrying 04 marks each. One internal choice is given in Q35 against part c only.
• All programming questions are to be answered using Python Language only.

Now download the Sample paper 2022-23 Computer Science Class 12 linked in the next section.

Download the Sample paper

Chapter-wise Weightage and Blue Print

Sr. No.	Topic	1 M	2 M	3 M	5 M	4 M	Total	Marks
1	Revision Tour	7	2*	1	–	–	10*	12
2	Function	1	2*	–	2*	–	5*	8
3	File Handling	3	–	2*	2*	1	8*	15
4	Stack	–	–	2*	–	–	2*	3
5	Networking	5	3*	–	1	–	9*	14
6	DBMS	1	3*	2	–	1	7*	12
7	Python Connectivity	1	–	–	2*	–	3*	6
	Total Questions	18*	10*	7*	7*	2	44*	70
	OR	–	4	2	3	–	9
	To be attempted	18	7	5	3	2	35
	Marks	18	14	15	15	8	70

Question Wise Explanation

[1] State True or False: “Variable declaration is implicit in Python.”

[2] Which of the following is an invalid datatype in Python?

• (a) Set
• (b) None
• (c)Integer
• (d)Real

[3] Given the following dictionaries:

dict_exam={"Exam":"AISSCE", "Year":2023}
dict_result={"Total":500, "Pass_Marks":165}

Which statement will merge the contents of both dictionaries?

• a. dict_exam.update(dict_result)
• b. dict_exam + dict_result
• c. dict_exam.add(dict_result)
• d. dict_exam.merge(dict_result)

[4] Consider the given expression:

not True and False or True

Which of the following will be the correct output if the given expression is evaluated?

• (a) True
• (b) False
• (c) NONE
• (d) NULL

[5] Select the correct output of the code:

a = "Year 2022 at All the best"
a = a.split('2')
b = a[0] + ". " + a[1] + ". " + a[3]
print (b)

• (a) Year . 0. at All the best
• (b) Year 0. at All the best
• (c) Year . 022. at All the best
• (d) Year . 0. at all the best

[6] Which of the following mode in file opening statement results or generates an error if the file does not exist?

• (a) a+
• (b) r+
• (c) w+
• (d) None of the above

[7] Fill in the blank:
___________________________ command is used to remove primary key from the table in SQL.

• (a) update
• (b) remove
• (c) alter
• (d) drop

[8] Which of the following commands will delete the table from MYSQL database?

• (a) DELETE TABLE
• (b) DROP TABLE
• (c) REMOVE TABLE
• (d) ALTER TABLE

[9] Which of the following statement(s) would give an error after executing the following code?

S="Welcome to class XII" # Statement 1
print(S) # Statement 2
S="Thank you" # Statement 3
S[0]= '@' # Statement 4
S=S+"Thank you" # Statement 5

(a) Statement 3
(b) Statement 4
(c) Statement 5
(d) Statement 4 and 5

[10] Fill in the blank:
_______________ is a non-key attribute, whose values are derived from the primary key of some other table.

• (a) Primary Key
• (b) Foreign Key
• (c) Candidate Key
• (d) Alternate Key

[11] The correct syntax of seek() is:

• (a) file_object.seek(offset [, reference_point])
• (b) seek(offset [, reference_point])
• (c) seek(offset, file_object)
• (d) seek.file_object(offset)

[12] Fill in the blank:
The SELECT statement when combined with _______________ clause, returns records without repetition.

• (a) DESCRIBE
• (b) UNIQUE
• (c) DISTINCT
• (d) NULL

[13] Fill in the blank:
__________ is a communication methodology designed to deliver both voice and multimedia communications over Internet protocol.

• (a) VoIP
• (b) SMTP
• (c) PPP
• (d)HTTP

[14] What will the following expression be evaluated to in Python?
print(15.0 / 4 + (8 + 3.0))

• (a) 14.75
• (b)14.0
• (c) 15
• (d) 15.5

[15] Which function is used to display the total number of records from table in a database?

• (a) sum(*)
• (b) total(*)
• (c) count(*)
• (d) return(*)

[16] To establish a connection between Python and SQL database, connect() is used. Which of the following arguments may not necessarily be given while calling connect() ?

• (a) host
• (b) database
• (c) user
• (d) password

Q17 and 18 are ASSERTION AND REASONING based questions. Mark the correct choice as

• (a) Both A and R are true and R is the correct explanation for A
• (b) Both A and R are true and R is not the correct explanation for A
• (c) A is True but R is False
• (d) A is false but R is True

[17] Assertion (A):- If the arguments in function call statement match the number and order of arguments as defined in the function definition, such arguments are called positional arguments.
Reasoning (R):- During a function call, the argument list first contains default argument(s) followed by positional argument(s).

[18] Assertion (A): CSV (Comma Separated Values) is a file format for data storage which looks like a text file.
Reason (R): The information is organized with one record on each line and each field is separated by comma.

[19] Rao has written a code to input a number and check whether it is prime or not. His code is having errors. Rewrite the correct code and underline the corrections made.

def prime():
    n=int(input("Enter number to check :: ")
    for i in range (2, n//2):
      if n%i=0:
         print("Number is not prime \n")
         break
      else:
         print("Number is prime \n’)

[20] Write two points of difference between Circuit Switching and Packet Switching.

OR

Write two points of difference between XML and HTML.

[21] (a) Given is a Python string declaration:

myexam="@@CBSE Examination 2022@@"

Write the output of: print(myexam[::-2])
(b) Write the output of the code given below:

my_dict = {"name": "Aman", "age": 26}
my_dict['age'] = 27
my_dict['address'] = "Delhi"
print(my_dict.items())

[22] Explain the use of ‘Foreign Key’ in a Relational Database Management System. Give example to support your answer.

[23] (a) Write the full forms of the following:

• (i) SMTP
• (ii) PPP

(b) What is the use of TELNET?

[24] Predict the output of the Python code given below:

def Diff(N1,N2):
   if N1>N2:
      return N1-N2
   else:
      return N2-N1
NUM= [10,23,14,54,32]
for CNT in range (4,0,-1):
    A=NUM[CNT]
    B=NUM[CNT-1]
    print(Diff(A,B),'#', end=' ')

OR

Predict the output of the Python code given below:

tuple1 = (11, 22, 33, 44, 55 ,66)
list1 =list(tuple1)
new_list = []
for i in list1:
 if i%2==0:
    new_list.append(i)
new_tuple = tuple(new_list)
print(new_tuple)

.

[25] Differentiate between count() and count(*) functions in SQL with appropriate example.

OR

Categorize the following commands as DDL or DML:
INSERT, UPDATE, ALTER, DROP

[26] (a) Consider the following tables – Bank_Account and Branch:

Table: Bank_Account

ACode	Name	Type
A01	Amrita	Savings
A02	Parthodas	Current
A03	Miraben	Current

Table: Branch
What will be the output of the following statement?
SELECT * FROM Bank_Account NATURAL JOIN Branch;

Ans.:

(b) Write the output of the queries (i) to (iv) based on the table, TECH_COURSE given below:
Table : Tech_Course

CID	CNAME	FEES	STARTDATE	TID
C201	Animation and FX	12000	2002-07-02	101
C202	CADD	15000	2021-11-15	NULL
C203	DCA	10000	2020-11-01	102
C204	DDTP	9000	2021-09-15	104
C205	Mobile application and development	18000	2022-11-01	101
C206	Digital Marketing	16000	2022-07-25	103

(i) SELECT DISTINCT TID FROM TECH_COURSE;
(ii) SELECT TID, COUNT(*), MIN(FEES) FROM TECH_COURSE GROUP BY TID HAVING COUNT(TID)>1;
(iii) SELECT CNAME FROM TECH_COURSE WHERE FEES>15000 ORDER BY CNAME;
(iv) SELECT AVG(FEES) FROM TECH_COURSE WHERE FEES BETWEEN 15000 AND 17000;

Ans.:

(i)

(ii)

(iii)

(iv)

15500.00

[27] Write a method COUNTLINES() in Python to read lines from text file ‘TESTFILE.TXT’ and display the lines which are not starting with any vowel.
Example:
If the file content is as follows:
An apple a day keeps the doctor away.
We all pray for everyone’s safety.
A marked difference will come in our country.
The COUNTLINES() function should display the output as:
The number of lines not starting with any vowel – 1

Ans.:

def COUNTLINES() :
   file = open ('TESTFILE.TXT', 'r')
   lines = file.readlines()
   count=0
   for w in lines :
      if (w[0]).lower() not in 'aeoiu'
        count = count + 1
    print ("The number of lines not starting with any vowel: ", count)
    file.close()
COUNTLINES()

OR

Write a function ETCount() in Python, which should read each character of a text file “TESTFILE.TXT” and then count and display the count of occurrence of alphabets E and T individually (including small cases e and t too).

Example:
If the file content is as follows:
Today is a pleasant day.
It might rain today.
It is mentioned on weather sites
The ETCount() function should display the output as:
E or e: 6
T or t : 9

Ans.:

def ETCount() :
 file = open ('TESTFILE.TXT', 'r')
 lines = file.readlines()
 countE=0
 countT=0
 for w in lines :
   for ch in w:
     if ch in 'Ee':
       countE = countE + 1
     if ch in 'Tt':
       countT=countT + 1
print ("The number of E or e : ", countE)
print ("The number of T or t : ", countT)
file.close()

[28] (a) Write the outputs of the SQL queries (i) to (iv) based on the relations between Teacher and Placement given below:
Table : Teacher

Table: Placement

P_ID	Department	Place
1	History	Ahmedabad
2	Mathematoics	Jaipur
3	Computer Sc	Nagpur

(i) SELECT Department, avg(salary) FROM Teacher GROUP BY Department;
(ii) SELECT MAX(Date_of_Join),MIN(Date_of_Join) FROM Teacher;
(iii) SELECT Name, Salary, T.Department, Place FROM Teacher T, Placement P WHERE T.Department = P.Department AND Salary>20000;
(iv) SELECT Name, Place FROM Teacher T, Placement P WHERE Gender =’F’ AND T.Department=P.Department;

Ans.:

(ii)

(iii)

(iv)

(b) Write the command to view all tables in a database.

[29] Write a function INDEX_LIST(L), where L is the list of elements passed as argument to the function. The function returns another list named ‘indexList’ that stores the indices of all Non-Zero Elements of L.
For example:
If L contains [12,4,0,11,0,56]
The indexList will have – [0,1,3,5]

Ans.:

def INDEX_LIST(L):
   indexList=[]
   for i in range(len(L)):
      if L[i]!=0:
         indexList.append(i)
return indexList

[30] A list contains following record of a customer:
[Customer_name, Phone_number, City]
Write the following user defined functions to perform given operations on the stack named ‘status’:
(i) Push_element() – To Push an object containing name and Phone number of customers who live in Goa to the stack
(ii) Pop_element() – To Pop the objects from the stack and display them. Also, display “Stack Empty” when there are no elements in the stack.
For example:
If the lists of customer details are:
[“Gurdas”, “99999999999”,”Goa”]
[“Julee”, “8888888888”,”Mumbai”] [“Murugan”,”77777777777”,”Cochin”]
[“Ashmit”, “1010101010”,”Goa”]
The stack should contain
[“Ashmit”,”1010101010”]
[“Gurdas”,”9999999999”]

The output should be:
[“Ashmit”,”1010101010”]
[“Gurdas”,”9999999999”]
Stack Empty

Ans.:

status=[]
def Push_element(cust):
  if cust[2]=="Goa":
    L1=[cust[0],cust[1]]
    status.append(L1)
def Pop_element ():
   num=len(status)
   while len(status)!=0:
     dele=status.pop()
     print(dele)
     num=num-1
   else:
     print("Stack Empty")

OR

Write a function in Python, Push(SItem) where , SItem is a dictionary containing the details of stationary items– {Sname:price}.
The function should push the names of those items in the stack who have price greater than 75. Also display the count of elements pushed into the stack.
For example:
If the dictionary contains the following data:

Ditem={“Pen”:106,”Pencil”:59,”Notebook”:80,”Eraser”:25}
The stack should contain
Notebook
Pen
The output should be:
The count of elements in the stack is 2

Ans.:

stackItem=[]
def Push(SItem):
   count=0
   for k in SItem:
      if (SItem[k]>=75):
         stackItem.append(k)
         count=count+1
   print("The count of elements in the stack is : ", count)

[31] MakeInIndia Corporation, an Uttarakhand based IT training company, is planning to set up training centres in various cities in next 2 years. Their first campus is coming up in Kashipur district. At Kashipur campus, they are planning to have 3 different blocks for App development, Web designing and Movie editing. Each block has number of computers, which are required to be connected in a network for communication, data and resource sharing. As a network consultant of this company, you have to suggest the best network related solutions for them for issues/problems raised in question nos. (i) to (v), keeping in mind the distances between various blocks/locations and other given parameters.

Distance between various blocks/locations:

Block	Distance
App development to web designing	28 m
App development to Movie Editing	55 m
Web Designing to Movie Editing	32 m
Kashipur Campus to Mussoorie Campus	232 km

No. of computer:

Block	Number of computers
App Development	75
Web Designing	50
Movie Editing	80

(i) Suggest the most appropriate block/location to house the SERVER in the Kashipur campus (out of the 3 blocks) to get the best and effective connectivity. Justify your answer.
(ii) Suggest a device/software to be installed in the Kashipur Campus to take care of data security.
(iii) Suggest the best wired medium and draw the cable layout (Block to Block) to economically connect various blocks within the Kashipur Campus.
(iv) Suggest the placement of the following devices with appropriate reasons:
a. Switch / Hub
b. Repeater
(v) Suggest a protocol that shall be needed to provide Video Conferencing solution between Kashipur Campus and Mussoorie Campus.

Ans.:

Cable Layout for iii:

[32] (a) Write the output of the code given below:

p=5
def sum(q,r=2):
  global p
  p=r+q**2
  print(p, end= '#')
a=10
b=5
sum(a,b)
sum(r=5,q=1)

(b) 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 tiger
• The table exists in a MYSQL database named school.
• The details (RollNo, Name, Clas and Marks) are to be accepted from the user.

Write the following missing statements to complete the code:

• 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

import mysql.connector as mysql
def sql_data():
  con1=mysql.connect(host="localhost",user="root", password="tiger",    database="school")
  mycursor=_____ #Statement 1
  rno=int(input("Enter Roll Number :: "))
  name=input("Enter name :: ")
  clas=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")

OR

(a) Predict the output of the code given below:

s="welcome2cs"
n = len(s)
m=""
for i in range(0, n):
   if (s[i] >= 'a' and s[i] <= 'm'): m = m +s[i].upper() elif (s[i] >= 'n' and s[i]  <= 'z'):
  m = m +s[i-1]
  elif (s[i].isupper()):
    m = m + s[i].lower()
  else:
    m = m +'&'
print(m)

Ans.: sELCcME&Cc

(b) The code given below reads the following record from the table named student and displays only those records who have marks greater than 75:

• RollNo – integer
• Name – string
• Clas – integer
• Marks – integer
• Note the following to establish connectivity between Python and MYSQL:
• Username is root
• Password is tiger
• The table exists in a MYSQL database named school.
• Write the following missing statements to complete the code:
• Statement 1 – to form the cursor object
• Statement 2 – to execute the query that extracts records of those students whose marks are greater than 75.
• Statement 3- to read the complete result of the query (records whose marks are greater than 75) into the object named data, from the table student in the database.

import mysql.connector as mysql
def sql_data():
  con1=mysql.connect(host="localhost",user="root",password="tiger",   database="school")
  mycursor=___ #Statement 1
  print("Students with marks greater than 75 are : ")
  _____________ #Statement 2 
  data=______ #Statement 3
  for i in data:
   print(i)
  print()

Ans.:

Statement 1:
con1.cursor()
Statement 2:
mycursor.execute(“select * from student where Marks>75”)
Statement 3:
mycursor.fetchall()

[33] What is the advantage of using a csv file for permanent storage? Write a Program in Python that defines and calls the following user defined functions:
(i) ADD() – To accept and add data of an employee to a CSV file ‘record.csv’. Each record consists of a list with field elements as empid, name and mobile to store employee id, employee name and employee salary respectively.

(ii) COUNTR() – To count the number of records present in the CSV file named ‘record.csv’.

Ans.:Advantage of a csv file:

• It is human readable – can be opened in Excel and Notepad applications
• It is just like text file

Program:

import csv
def ADD():
   fout=open("record.csv","a",newline="\n")
   wr=csv.writer(fout)
   empid=int(input("Enter Employee id :: "))
   name=input("Enter name :: ")
   mobile=int(input("Enter mobile number :: "))
   lst=[empid,name,mobile] ---------1/2 mark
   wr.writerow(lst) ---------1/2 mark
   fout.close()
def COUNTR():
   fin=open("record.csv","r",newline="\n")
   data=csv.reader(fin)
   d=list(data)
   print(len(d))
   fin.close()
ADD()
COUNTR()

OR

Give any one point of difference between a binary file and a csv file.
Write a Program in Python that defines and calls the following user defined functions:
(i) add() – To accept and add data of an employee to a CSV file ‘furdata.csv’. Each record consists of a list with field elements as fid, fname and fprice to store furniture id, furniture name and furniture price respectively.
(ii) search()- To display the records of the furniture whose price is more than 10000.

Ans.:

Difference between binary file and csv file: (Any one difference may be given)
Binary file:

• Extension is .dat
• Not human readable
• Stores data in the form of 0s and 1s

CSV file

• Extension is .csv
• Human readable
• Stores data like a text file

import csv
def add():
  fout=open("furdata.csv","a",newline='\n')
  wr=csv.writer(fout)
  fid=int(input("Enter Furniture Id :: "))
  fname=input("Enter Furniture name :: ")
  fprice=int(input("Enter price :: "))
  FD=[fid,fname,fprice]
  wr.writerow(FD)
  fout.close()
def search():
  fin=open("furdata.csv","r",newline='\n')
  data=csv.reader(fin)
  found=False
  print("The Details are")
  for i in data:
    if int(i[2])>10000:
      found=True
      print(i[0],i[1],i[2])
    if found==False:
      print("Record not found")
  fin.close()
add()
print("Now displaying")
search()

[34] Navdeep creates a table RESULT with a set of records to maintain the marks secured by students in Sem 1, Sem2, Sem3 and their division. After creation of the table, he has entered data of 7 students in the table.

Based on the data given above answer the following questions:
(i) Identify the most appropriate column, which can be considered as Primary key.

Ans.: ROLL_NO
(ii) If two columns are added and 2 rows are deleted from the table result, what will be the new degree and cardinality of the above table?

Ans.: Degree – 8, Cardinality 5

(iii) Write the statements to:
a. Insert the following record into the table
Roll No- 108, Name- Aadit, Sem1- 470, Sem2-444, Sem3-475, Div – I.
b. Increase the SEM2 marks of the students by 3% whose name begins with ‘N’.

Ans.:

a. INSERT INTO RESULT VALUES (108, ‘Aadit’, 470, 444, 475, ‘I’);
b. UPDATE RESULT SET SEM2=SEM2+ (SEM2*0.03) WHERE SNAME LIKE “N%”;

OR

(Option for part iii only)

(iii) Write the statements to:
a. Delete the record of students securing IV division.
b. Add a column REMARKS in the table with datatype as varchar with 50 characters

a. DELETE FROM RESULT WHERE DIV=’IV’;
b. ALTER TABLE RESULT ADD (REMARKS VARCHAR(50));

[35] Aman is a Python programmer. He has written a code and created a binary file record.dat with employeeid, ename and salary. The file contains 10 records.
He now has to update a record based on the employee id entered by the user and update the salary. The updated record is then to be written in the file temp.dat. The records which are not to be updated also have to be written to the file temp.dat. If the employee id is not found, an appropriate message should to be displayed.
As a Python expert, help him to complete the following code based on the requirement given above:

import #Statement 1
def update_data():
rec={}
fin=open(“record.dat”,”rb”)
fout=open(“__“) #Statement 2
found=False
eid=int(input(“Enter employee id to update their salary :: “))
while True:
try:
rec=__ #Statement 3
if rec[“Employee id”]==eid:
found=True
rec[“Salary”]=int(input(“Enter new salary :: “))
pickle.__ #Statement 4
else:
pickle.dump(rec,fout)
except:
break
if found==True:
print(“The salary of employee id “,eid,” has been updated.”)
else:
print(“No employee with such id is not found”)
fin.close()
fout.close()

(i) Which module should be imported in the program? (Statement 1)
(ii) Write the correct statement required to open a temporary file named temp.dat. (Statement 2)
(iii) Which statement should Aman fill in Statement 3 to read the data from the binary file, record.dat and in Statement 4 to write the updated data in the file, temp.dat?

Ans.:

(i) pickle

(ii) fout=open(‘temp.dat’, ‘wb’)

(iii) Statement 3: pickle.load(fin)
Statement 4: pickle.dump(rec,fout)

Watch this video for more understanding:

If you are looking for a questions chapter wise follow these links:

Objective-type questions have a vital role in making question papers now. So if you are looking for MCQs for the same follow this link:

Computer Science MCQ Questions

This blueprint for a computer science class 12 is prepared by us as per the new pattern to help the community to make a question paper for half yearly exam or term 1 exam. Here we will try to provide you few sample papers for the same.

More Sample Papers for Half yearly/ Mid Term/PT 2/Term 1 Exam

S.No	Sample Paper & Marking Scheme	Answer key	Youtube Video
1	SQP 1	SQP 1 Answer Key	Watch video
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2	SQP 2	SQP 2 Answer Key	Watch Video

More Sample paper 2022-23 Computer Science Class 12 Pre-board/Prelim/Practice

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2	Sample Paper 2	View/Download	Watch Now
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3	Kerala Sahodaya
4	S. S. Mota Singh Sr. Sec. Model School

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Thank you for reading this article Sample paper 2022-23 Computer Science Class 12.