Exam Paper Print – Computer Sir Ki Class

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Exam Paper: CBSE-Class 12th-Comp. Sc.-2018-All India (Python) No. of Q.28
Q.B01A 2

Differentiate between Syntax Error and Run-Time Error? Also, write a suitable example in Python to illustrate both.



Q.B01A 1

Name the Python Library modules which need to be imported to invoke the following functions:

(i) sin() (ii) search ()



Q.B01C 2

Rewrite the following code in python after removing all syntax error(s). Underline each correction done in the code.

Val = int(rawinput("Value:"))
Adder = 0

for C in range(1,Val,3)
    Adder+=C
    if C%2=0:
        Print C*10
    Else:
        print C*
print Adder


Q.B01D 2

Find and write the output of the following python code:

Data  = ["P",20,"R",10,"S",30]
Times = 0
Alpha = ""
Add   = 0
for C in range(1,6,2):
    Times= Times + C
    Alpha= Alpha + Data[C-1]+"$"
    Add = Add + Data[C]
    print Times,Add,Alpha


Q.B01E 3

Find and write the output of the following python code:

class GRAPH:
    def __init__(self,A=50,B=100):
        self.P1=A
        self.P2=B
    def Up(self,B):
        self.P2 = self.P2 - B
    def Down(self,B):
        self.P2 = self.P2 + 2*B
    def Left(self,A):
        self.P1 = self.P1 - A
    def Right(self,A):
        self.P1 = self.P1 + 2*A
    def Target(self):
        print "(",self.P1.":",self.P2,")"
G1=GRAPH(200,150)
G2=GRAPH()
G3=GRAPH(100)
G1.Left(10)
G2.Up(25)
G3.Down(75)
G1.Up(30)
G3.Right(15)
G1.Target()
G2.Target()
G3.Target()


Q.B01F 2

What possible outputs(s) are expected to be displayed on screen at the time of execution of the program from the following code? Also specify the maximum values that can be assigned to each of the variables BEGIN and LAST.

import random
POINTS=[20,40,10,30,15];
POINTS=[30,50,20,40,45];
BEGIN=random.randint(1,3)
LAST=random.randint(2,4)
for C in range(BEGIN,LAST+1):
print POINTS[C],”#”,

(i) 20#50#30#           (ii) 20#40#45#
(iii) 50#20#40#         (iv) 30#50#20#


Q.B02A 2

What is the advantage of super() function in inheritance? Illustrate the same with the help of an example in Python.



Q.B02B 2

class Vehicle:                        #Line 1
    Type = 'Car'                      #Line 2
    def __init__(self, name):         #Line 3
        self.Name = name              #Line 4
    def Show(self):                   #Line 5
        print self.Name,Vehicle.Type  #Line 6

V1=Vehicle("BMW")                     #Line 7
V1.Show()                             #Line 8
Vehicle.Type="Bus"                    #Line 9
V2=Vehicle("VOLVO")                   #Line 10
V2.Show()                             #Line 11

(i) What is the difference between the variable in Line 2 and Line 4 in the above Python code?

(ii) Write the output of the above Python code.



Q.B02C 4

Define a class CONTAINER in Python with following specifications

Instance Attributes
- Radius,Height   # Radius and Height of Container
- Type            # Type of Container
- Volume          # Volume of Container

Methods
- CalVolume()     # To calculate volume
                  # as per the Type of container
                  # With the formula as given below:
Type Formula to calculate Volume
1 3.14 * Radius * Height
3 3.14 * Radius * Height/3
- GetValue()       # To allow user to enter values of
                   # Radius, Height and Type.
                   # Also, this method should call
                   # CalVolume() to calculate Volume
- ShowContainer()  # To display Radius, Height, Type
                   # Volume of the Container


Q.B02D 4

Answer the questions (i) to (iv) based on the following:

Class Top1(object):
    def __init__(self,tx): #Line 1
        self.X=tx              #Line 2
    def ChangeX(self,tx):
        self.X=self.X+tx
    def ShowX(self):
        print self.X
Class Top2(object):
    def __init__(self,ty): #Line 3
        self.Y=ty              #Line 4
    def ChangeY(self,ty):
        self.Y=self.Y+ty
    def ShowY(self):
        print self.Y,
class Bottom(Top1,Top2):
    def __init__(self,tz): #Line 5
        self.Z = tz #Line 6
        Top2.__init__(self,2*tz) #Line 7
        Top1.__init__(self,3*tz) #Line 8
    def ChangeZ(self,tz):
        self.Z=self.Z+tz
        self.ChangeY(2*tz)
        self.ChangeX(3*tz)
    def ShowZ(self):
        print self.Z,
        self.ShowY()
        self.ShowX()
    B=Bottom(1)
    B.ChangeZ(2)
    B.ShowZ()

(i) Write the type of the inheritance illustrated in the above.

(ii) Find and write the output of the above code.

(iii) What are the methods shown in Line 1, Line 3 and Line 5 are known as?

(iv) What is the difference between the statements shown in Line 6 and Line 7?



Q.B03A 3

Consider the following randomly ordered numbers stored in a list
786, 234, 526, 132, 345, 467,
Show the content of list after the First, Second and Third pass of the bubble sort method used for arranging in ascending order ?
Note: Show the status of all the elements after each pass very clearly underlining the changes.



Q.B03B 3

Write definition of a method ZeroEnding(SCORES) to add all those values in the list of SCORES, which are ending with zero (0) and display the sum.
For example,
If the SCORES contain [200,456,300,100,234,678]
The sum should be displayed as 600



Q.B03C 4

Write AddClient(Client) and DeleteCleint(Client) methods in python to add a new Client and delete a Client from a List of Client Names, considering them to act as insert and delete operations of the queue data structure.



Q.B03D 2

Write definition of a Method COUNTNOW(PLACES) to find and display those place
names, in which there are more than 5 characters.
For example:
If the list PLACES contains
[“DELHI”,”LONDON”,”PARIS”,”NEW YORK”,”DUBAI”]
The following should get displayed
LONDON
NEW YORK



Q.B03E 2

Evaluate the following Postfix notation of expression:
22,11,/,5,10,*,+,12,-



Q.B04A 1

Write a statement in Python to open a text file STORY.TXT so that new contents can be added at the end of it.



Q.B04B 2

Write a method in python to read lines from a text file INDIA.TXT, to find and display the occurrence of the word “India”.
For example:
If the content of the file is

“India is the fastest growing economy. 
India is looking for more investments around the globe.
The whole world is looking at India as a great market. 
Most of the Indians can foresee the heights that India is
capable of reaching.”

The output should be 4



Q.B04C 3

Considering the following definition of class MULTIPLEX, write a method in python to search and display all the content in a pickled file CINEMA.DAT, where MTYPE is matching with the value ‘Comedy’.

class MULTIPLEX:
    def __init__(self,mno,mname,mtype):
        self.MNO = mno
        self.MNAME = mname
        self.MTYPE = mtype
    def Show(self):
        print self.MNO:"*",self.MNAME,"$",self.MTYPE


Section-C

Q. 05A 2

Observe the following tables VIDEO and MEMBER carefully and write the name of the RDBMS operation out of (i) SELECTION (ii) PROJECTION (iii) UNION (iv) CARTESIAN PRODUCT, which has been used to produce the output as shown below, Also, find the Degree and Cardinality of the final result.
TABLE: VIDEO

VNO VNAME TYPE
F101 The Last Battle Fiction
C101 Angels and Devils Comedy
C102 Daredevils Adventure

TABLE: MEMBER

MNO MNAME
M101 Namish Gupta
M102 Sana Sheikh
M103 Lara James

FINAL RESULT

VNO VNAME TYPE MNO MNAME
F101 The Last Battle Fiction M101 Namish Gupta
F101 The Last Battle Fiction M102 Sana Sheikh
F101 The Last Battle Fiction M103 Lara James
C101 Angels and Devils Comedy M101 Namish Gupta
C101 Angels and Devils Comedy M102 Sana Sheikh
C101 Angels and Devils Comedy M103 Lara James
A102 Daredevils Adventure M101 Namish Gupta
A102 Daredevils Adventure M102 Sana Sheikh
A102 Daredevils Adventure M103 Lara James


Q. 05B 6

Write SQL queries for (i) to (iv) and find outputs for SQL queries (v) to (viii), which are based on the tables.
Table: ACCOUNT

ANO ANAME ADDRESS
101 Nirja Singh Bangalore
102 Rohan Gupta Chennai
103 Ali Reza Hyderabad
104 Rishabh Jain Chennai
105 Simran Kaur Chandigarh

Table: TRANSACT

TRNO ANO AMOUNT TYPE DOT
T001 101 2500 Withdraw 2017-12-21
T002 103 3000 Deposit 2017-06-01
T003 102 2000 Withdraw 2017-05-12
T004 103 1000 Deposit 2017-10-22
T005 101 12000 Deposit 2017-11-06

(i) To display details of all transactions of TYPE Deposit from Table TRANSACT.

(ii) To display the ANO and AMOUNT of all Deposits and Withdrawals done in the month of October 2017 from table TRANSACT.

(iii) To display the last date of transaction (DOT) from the table TRANSACT for the Accounts having ANO as 103.

(iv) To display all ANO, ANAME and DOT of those persons from tables ACCOUNT and TRANSACT who have done transactions less than or equal to 3000.

(v) SELECT ANO, ANAME FROM ACCOUNT
WHERE ADDRESS NOT IN (‘CHENNAI’, ‘BANGALORE’);

(vi) SELECT DISTINCT ANO FROM TRANSACT;

(vii) SELECT ANO, COUNT(*), MIN(AMOUNT) FROM TRANSACT
GROUP BY ANO HAVING COUNT(*)> 1;

(viii) SELECT COUNT(*), SUM(AMOUNT) FROM TRANSACT
WHERE DOT <= ‘2017-06-01’;



Q. 06A 2

State any one Absorption Law of Boolean Algebra and verify it using truth table.



Q. 06B 2

Draw the Logic Circuit of the following Boolean Expression:
(U’+V).(V’+W’)



Q. 06C 1

Derive a Canonical POS expression for a Boolean function FN, represented by the following truth table:

X Y Z FN(X,Y,Z)
0 0 0 1
0 0 1 1
0 1 0 0
0 1 1 0
1 0 0 1
1 0 1 0
1 1 0 0
1 1 1 1


Q. 06D 3

Reduce the following Boolean Expression to its simplest form using K-Map:

G(U,V,W,Z) = Σ (3,5,6,7,11,12,13,15)

 



Q. 07A 2

Differentiate between Bus Topology and Star Topology of Networks. What are the advantages and disadvantages of Star Topology over Bus Topology?



Q. 07B 2

Classify each of the following Web Scripting as Client Side Scripting and Server Side Scripting:
(i) JavaScripting (ii) ASP (iii) VB Scripting (iv) JSP



Q. 07C 2

Write the expanded names for the following abbreviated terms used in Networking and Communications:
(i) SMTP (ii) VoIP (iii) GSM (iv) WLL



Q. 07D 4

CASE STUDY BASED QUESTION:

Ayurveda Training Educational Institute is setting up its centre in Hyderabad with four specialised departments for Orthopedics, Neurology and Pediatrics along with an administrative office in separate buildings. The physical distances between these department buildings and the number of computers to be installed in these departments and administrative office as given as follows. You as a network expert have to answer the queries as raised by them in (i) to (iv).

Shortest distances between various locations in metres:

Administrative Office to Orthopedics Unit 55
Neurology Unit to Administrative Office 30
Orthopedics Unit to Neurology Unit 70
Pediatrics Unit to Neurology Unit 50
Pediatrics Unit to Administrative Office 40
Pediatrics Unit to Orthopedics Unit 110

Number of Computers installed at the various locations are as follows:

Pediatrics Unit 40
Administrative Office 140
Neurology 50
Orthopedics Unit 80

(i) Suggest the most suitable location to install the main server of this institution to get efficient connectivity.

(ii) Suggest the best cable layout for effective network connectivity of the building having server with all the other buildings.

(iii) Suggest the devices to be installed in each of these buildings for connecting computers installed within the building out of the following:
-Gateway
-Modem
-Switch

(iv) Suggest the topology of the network and network cable for efficiently connecting each computer installed in each of the buildings out of the following:
Topologies : Bus topology, Star Topology
Network Cable: Single Pair Telephone Cable, Coaxial Cable, Ethernet Cable