Class 12 Computer Science: CBSE Marking Scheme (2023-24) | CBSE Sample Papers for Class 12 Humanities - Humanities/Arts PDF Download

 Page 1


[1] 
 
Class XII 
Computer Science (083) 
Marking Scheme 
Time Allowed: 3 hours          MM: 70 
Ques 
No 
Question and Answers 
Distribution 
of Marks 
Total 
Marks 
SECTION A 
1 
False 
1 mark for 
correct 
answer 
1 
2 
Option b 
6,20 
1 mark for 
correct 
answer 
1 
3 
Option c 
-244.0 
1 mark for 
correct 
answer 
1 
4 
PYTHON-is-Fun 
1 mark for 
correct 
answer 
1 
5 
Option b 
8,15 
1 mark for 
correct 
answer 
1 
6 
Option a 
PAN 
1 mark for 
correct 
answer 
1 
7 
Option b 
del D1["Red"] 
1 mark for 
correct 
answer 
1 
8 
Option b 
1 mark for 
correct 
answer 
1 
Page 2


[1] 
 
Class XII 
Computer Science (083) 
Marking Scheme 
Time Allowed: 3 hours          MM: 70 
Ques 
No 
Question and Answers 
Distribution 
of Marks 
Total 
Marks 
SECTION A 
1 
False 
1 mark for 
correct 
answer 
1 
2 
Option b 
6,20 
1 mark for 
correct 
answer 
1 
3 
Option c 
-244.0 
1 mark for 
correct 
answer 
1 
4 
PYTHON-is-Fun 
1 mark for 
correct 
answer 
1 
5 
Option b 
8,15 
1 mark for 
correct 
answer 
1 
6 
Option a 
PAN 
1 mark for 
correct 
answer 
1 
7 
Option b 
del D1["Red"] 
1 mark for 
correct 
answer 
1 
8 
Option b 
1 mark for 
correct 
answer 
1 
[2] 
 
  
ceieP0 
9 
Option d 
Statement 4 
1 mark for 
correct 
answer 
1 
10 
Option b 
WHITE* 
BLACK* 
1 mark for 
correct 
answer 
1 
11 
Option b 
Modulator 
1 mark for 
correct 
answer 
1 
12 
Option c 
global b 
1 mark for 
correct 
answer 
1 
13 
True 
1 mark for 
correct 
answer 
1 
14 
Option c 
A candidate key that is not a primary key is a foreign key. 
1 mark for 
correct 
answer 
1 
15 
Circuit 
1 mark for 
correct 
answer 
1 
16 
Option c 
seek() 
1 mark for 
correct 
answer 
1 
17 
Option d 
A is false but R is True 
1 mark for 
correct 
answer 
1 
Page 3


[1] 
 
Class XII 
Computer Science (083) 
Marking Scheme 
Time Allowed: 3 hours          MM: 70 
Ques 
No 
Question and Answers 
Distribution 
of Marks 
Total 
Marks 
SECTION A 
1 
False 
1 mark for 
correct 
answer 
1 
2 
Option b 
6,20 
1 mark for 
correct 
answer 
1 
3 
Option c 
-244.0 
1 mark for 
correct 
answer 
1 
4 
PYTHON-is-Fun 
1 mark for 
correct 
answer 
1 
5 
Option b 
8,15 
1 mark for 
correct 
answer 
1 
6 
Option a 
PAN 
1 mark for 
correct 
answer 
1 
7 
Option b 
del D1["Red"] 
1 mark for 
correct 
answer 
1 
8 
Option b 
1 mark for 
correct 
answer 
1 
[2] 
 
  
ceieP0 
9 
Option d 
Statement 4 
1 mark for 
correct 
answer 
1 
10 
Option b 
WHITE* 
BLACK* 
1 mark for 
correct 
answer 
1 
11 
Option b 
Modulator 
1 mark for 
correct 
answer 
1 
12 
Option c 
global b 
1 mark for 
correct 
answer 
1 
13 
True 
1 mark for 
correct 
answer 
1 
14 
Option c 
A candidate key that is not a primary key is a foreign key. 
1 mark for 
correct 
answer 
1 
15 
Circuit 
1 mark for 
correct 
answer 
1 
16 
Option c 
seek() 
1 mark for 
correct 
answer 
1 
17 
Option d 
A is false but R is True 
1 mark for 
correct 
answer 
1 
[3] 
 
 
18 
Option b 
Both A and R are true but R is not the correct explanation for A 
1 mark for 
correct 
answer 
1 
SECTION B 
19 
(i)  
POP3 – Post Office Protocol 3 
URL – Uniform Resource Locator 
(ii)  
HTML( Hyper text mark Up language) 
? We use pre-defined tags 
? Static web development language – only focuses on how 
data looks 
? It use for only displaying data, cannot transport data 
? Not case sensistive 
XML (Extensible Markup Language) 
? we can define our own tags and use them 
? Dynamic web development language – as it is used for 
transporting and storing data 
? Case sensitive 
                                          OR 
 
(i) Bandwidth is the maximum rate of data transfer over  
a given transmission medium. / The amount of 
information that can be transmitted over a network.  
½ mark for 
each correct 
expansion 
 
 
 
 
 
 
 
 
 
1 mark for 
any one 
correct 
difference 
No mark to 
be awarded if 
only full form 
is given 
 
1 mark for 
correct 
definition 
 
1+1=2 
Page 4


[1] 
 
Class XII 
Computer Science (083) 
Marking Scheme 
Time Allowed: 3 hours          MM: 70 
Ques 
No 
Question and Answers 
Distribution 
of Marks 
Total 
Marks 
SECTION A 
1 
False 
1 mark for 
correct 
answer 
1 
2 
Option b 
6,20 
1 mark for 
correct 
answer 
1 
3 
Option c 
-244.0 
1 mark for 
correct 
answer 
1 
4 
PYTHON-is-Fun 
1 mark for 
correct 
answer 
1 
5 
Option b 
8,15 
1 mark for 
correct 
answer 
1 
6 
Option a 
PAN 
1 mark for 
correct 
answer 
1 
7 
Option b 
del D1["Red"] 
1 mark for 
correct 
answer 
1 
8 
Option b 
1 mark for 
correct 
answer 
1 
[2] 
 
  
ceieP0 
9 
Option d 
Statement 4 
1 mark for 
correct 
answer 
1 
10 
Option b 
WHITE* 
BLACK* 
1 mark for 
correct 
answer 
1 
11 
Option b 
Modulator 
1 mark for 
correct 
answer 
1 
12 
Option c 
global b 
1 mark for 
correct 
answer 
1 
13 
True 
1 mark for 
correct 
answer 
1 
14 
Option c 
A candidate key that is not a primary key is a foreign key. 
1 mark for 
correct 
answer 
1 
15 
Circuit 
1 mark for 
correct 
answer 
1 
16 
Option c 
seek() 
1 mark for 
correct 
answer 
1 
17 
Option d 
A is false but R is True 
1 mark for 
correct 
answer 
1 
[3] 
 
 
18 
Option b 
Both A and R are true but R is not the correct explanation for A 
1 mark for 
correct 
answer 
1 
SECTION B 
19 
(i)  
POP3 – Post Office Protocol 3 
URL – Uniform Resource Locator 
(ii)  
HTML( Hyper text mark Up language) 
? We use pre-defined tags 
? Static web development language – only focuses on how 
data looks 
? It use for only displaying data, cannot transport data 
? Not case sensistive 
XML (Extensible Markup Language) 
? we can define our own tags and use them 
? Dynamic web development language – as it is used for 
transporting and storing data 
? Case sensitive 
                                          OR 
 
(i) Bandwidth is the maximum rate of data transfer over  
a given transmission medium. / The amount of 
information that can be transmitted over a network.  
½ mark for 
each correct 
expansion 
 
 
 
 
 
 
 
 
 
1 mark for 
any one 
correct 
difference 
No mark to 
be awarded if 
only full form 
is given 
 
1 mark for 
correct 
definition 
 
1+1=2 
[4] 
 
(ii) https (Hyper Text Transfer Protocol Secure) is the 
protocol that uses SSL (Secure Socket Layer) to 
encrypt data being transmitted over the Internet. 
Therefore, https helps in secure browsing while http 
does not.  
1 mark for 
correct 
difference. 
 
 
20 def revNumber(num): 
    rev = 0 
    rem = 0 
    while num > 0: 
        rem =num %10 
        rev = rev*10 + rem 
        num = num//10 
    return rev 
print(revNumber(1234)) 
 
½ mark for 
each 
correction 
made 
2 
21 
 
                                                 OR 
 
½ mark for 
correct 
function 
header 
½ mark for 
correct loop 
½  mark for 
correct if 
statement 
½ mark for 
displaying 
the output 
 
½ mark for 
correct 
function 
header 
½ mark for 
using split() 
2 
Page 5


[1] 
 
Class XII 
Computer Science (083) 
Marking Scheme 
Time Allowed: 3 hours          MM: 70 
Ques 
No 
Question and Answers 
Distribution 
of Marks 
Total 
Marks 
SECTION A 
1 
False 
1 mark for 
correct 
answer 
1 
2 
Option b 
6,20 
1 mark for 
correct 
answer 
1 
3 
Option c 
-244.0 
1 mark for 
correct 
answer 
1 
4 
PYTHON-is-Fun 
1 mark for 
correct 
answer 
1 
5 
Option b 
8,15 
1 mark for 
correct 
answer 
1 
6 
Option a 
PAN 
1 mark for 
correct 
answer 
1 
7 
Option b 
del D1["Red"] 
1 mark for 
correct 
answer 
1 
8 
Option b 
1 mark for 
correct 
answer 
1 
[2] 
 
  
ceieP0 
9 
Option d 
Statement 4 
1 mark for 
correct 
answer 
1 
10 
Option b 
WHITE* 
BLACK* 
1 mark for 
correct 
answer 
1 
11 
Option b 
Modulator 
1 mark for 
correct 
answer 
1 
12 
Option c 
global b 
1 mark for 
correct 
answer 
1 
13 
True 
1 mark for 
correct 
answer 
1 
14 
Option c 
A candidate key that is not a primary key is a foreign key. 
1 mark for 
correct 
answer 
1 
15 
Circuit 
1 mark for 
correct 
answer 
1 
16 
Option c 
seek() 
1 mark for 
correct 
answer 
1 
17 
Option d 
A is false but R is True 
1 mark for 
correct 
answer 
1 
[3] 
 
 
18 
Option b 
Both A and R are true but R is not the correct explanation for A 
1 mark for 
correct 
answer 
1 
SECTION B 
19 
(i)  
POP3 – Post Office Protocol 3 
URL – Uniform Resource Locator 
(ii)  
HTML( Hyper text mark Up language) 
? We use pre-defined tags 
? Static web development language – only focuses on how 
data looks 
? It use for only displaying data, cannot transport data 
? Not case sensistive 
XML (Extensible Markup Language) 
? we can define our own tags and use them 
? Dynamic web development language – as it is used for 
transporting and storing data 
? Case sensitive 
                                          OR 
 
(i) Bandwidth is the maximum rate of data transfer over  
a given transmission medium. / The amount of 
information that can be transmitted over a network.  
½ mark for 
each correct 
expansion 
 
 
 
 
 
 
 
 
 
1 mark for 
any one 
correct 
difference 
No mark to 
be awarded if 
only full form 
is given 
 
1 mark for 
correct 
definition 
 
1+1=2 
[4] 
 
(ii) https (Hyper Text Transfer Protocol Secure) is the 
protocol that uses SSL (Secure Socket Layer) to 
encrypt data being transmitted over the Internet. 
Therefore, https helps in secure browsing while http 
does not.  
1 mark for 
correct 
difference. 
 
 
20 def revNumber(num): 
    rev = 0 
    rem = 0 
    while num > 0: 
        rem =num %10 
        rev = rev*10 + rem 
        num = num//10 
    return rev 
print(revNumber(1234)) 
 
½ mark for 
each 
correction 
made 
2 
21 
 
                                                 OR 
 
½ mark for 
correct 
function 
header 
½ mark for 
correct loop 
½  mark for 
correct if 
statement 
½ mark for 
displaying 
the output 
 
½ mark for 
correct 
function 
header 
½ mark for 
using split() 
2 
[5] 
 
 
Note: Any other correct logic may be marked 
½ mark for 
adding to 
tuple  
½ mark for 
return 
statement 
 
22 
4*L 
33*4 
21*S 
10*6 
½ mark for 
each correct 
line of output 
2 
23 (i) L1.insert(2,200) 
(ii) message.endswith('.') 
 
                          OR 
import statistics 
print( statistics.mode(studentAge) ) 
1 mark for 
each correct 
statement 
 
 
1 mark for 
correct 
import 
statement 
1 mark for 
correct 
command 
with mode() 
and print() 
1+1=2 
24 
SQL Command to add primary key: 
ALTER TABLE Employee ADD EmpId INTEGER 
PRIMARY KEY; 
1 mark for 
correct 
ALTER TABLE 
command 
2