selfstudys_com_file (4).pdfjsjdcjjsjxjdnxjj

Time Allowed: 3 hours Maximum Marks: 70
General Instructions:

This question paper contains 37 questions.
All questions are compulsory. However, internal choices have been provided in
some questions. Attempt only one of the choices in such questions.
The paper is divided into 5 Sections- A, B, C, D and E.
Section A consists of 21 questions (1 to 21). Each question carries 1 Mark.
Section B consists of 7 questions (22 to 28). Each question carries 2 Marks.
Section C consists of 3 questions (29 to 31). Each question carries 3 Marks.
Section D consists of 4 questions (32 to 35). Each question carries 4 Marks.
Section E consists of 2 questions (36 to 37). Each question carries 5 Marks.
All programming questions are to be answered using Python Language only.
In case of MCQ, text of the correct answer should also be written.
Section A
1. State true or false:
Like while, the for loop also works with conditions and truth values.
[1]
a)Attributes b)Tuples
c)Keys d)Relations
2. A relational database consists of a collection of ________. [1]
a)The data types of all data in all
files.
b)The names of all fields in all
files.
c)All of these d)The widths of all fields in all
files.
3. What does the special file called data dictionary contains? [1]
4. Given a function that does not return any value, what value is thrown by default
when executed in shell?
[1]
SAMPLE QUESTION PAPER - 4
Computer Science (083)
Class XII (2024-25)

a)void b)None
c)bool d)int
5. Out of the following, find those identifiers, which cannot be used for naming
Variables or Functions in a Python program:
Price*Qty, class, For, do, 4thCol, totally, Row31, _Amount
[1]
a)accepted b)resend
c)rejected d)sent back
6. If value of checksum is 0, then message is [1]
a)dump(myfile.obj1) b)write(obj1.myfile)
c)dump(obj1.myfile) d)load(myfile.obj1)
7. Raghav is trying to write an object obj1 = (1,2,3,4,5) on a binary file “test.bin”.
Consider the following code written by him.
import pickle
obj1 = (1,2,3,4,5) myfile = open(“test.bin”.‘wb’)
pickle.________ #Statement 1
myfile.close()
Identify the missing code in Statement 1.
[1]
a)Insert b)Read
c)Update d)Delete
8. ________ operation is required when you want to create your records into a
database table.
[1]
a)Dept b)ID
c)Total credits d)Name
9. Consider the table with structure as:
Student(ID, name, dept name, tot_cred)
Which attribute will form the primary key?
[1]
10. What is the use of mkdir() method? [1]

11. State true or false:
Default parameters cannot be skipped in the function call.
[1]
a)push b)insert
c)top d)pop
12. The insertion operation in the stack is called ________. [1]
13. What is data redundancy? What are the problems associated with it? [1]
a)internet relay chat b)routing information protocol
c)network time protocol d)domain name system
14. The ________ translates internet domain and hostnames to IP address. [1]
a)A, C b)B, D
c)A, D d)C, D
15. Which two lines of code are valid strings in Python?
A. This is a string
B. 'This is a string'
C. (This is a string)
D. "This is a string"
[1]
a)IS b)BETWEEN
c)IN d)LIKE
16. Which of the following clauses in SQL is most appropriate to use to select
matching tuples in a specific range of values?
[1]
a)frequency modulation b)amplitude modulation
c)modulation d)demodulation
17. In computer, process of superimposing a low frequency signal over a high
frequency signal is called
[1]
18. An eight wired connector that is used to connect computers on a local area
network?
[1]

Section B
a)RJ-45 b)Ethernet Card
c)Switch d)Modem
a)Both A and R are true and R is
the correct explanation of A.
b)Both A and R are true but R is
not the correct explanation of
A.
c)A is true but R is false. d)A is false but R is true.
19. Assertion (A): When the comparison operator is directly applied to a series object,
it returns a filtered result containing the value that returns true.
Reason (R): Applying comparison operator on series works in vectorized way.
[1]
A.
20. Assertion (A): Python provides the remove() method which is used to remove the
file pointer.
Reason (R): The mkdir() method is used to create the directories in the current
working directory.
[1]
A.
21. Assertion (A): The enumerate() function takes a collection (e.g. a tuple) and
returns it as an enumerate object.
Reason (R): The enumerate() adds a counter as the key of the enumerated object.
[1]
22. What is collision in a network? How does it impact the performance of a network? [2]
23. Write the code to create a table Product in database Inventory with following fields:
Fields Datatype
PID varchar(5)
[2]

PName char(30)
Price float
Rank varchar(2)
24. In the below given code fragments, indicate the data type of each bold part by
choosing the correct type of data from the following type.
a. int
b. float
c. bool
d. str
e. function
f. list of int
g. list of str
i. L = inputline.split( )
while L != ( ) :
print(L)
L = L[1 :]
ii. L = ['Hiya', 'Zoya', 'Preet']
print(L[0] + L[1])
[2]
OR
Underline the run-time error in the following program.
a = int(input("Enter a : "))
b = 0
c = a/b
25. What are data types? What are the main objectives of datatypes? [2]

26. Find the errors in following code and write the correct code.
if v < 5:
for j in range(v):
print "ABC"
else:
print "XYZ"
i. Underline the corrections
ii. Write the reason!error next to it in comment form.
[2]
OR
Write the suitable method's name for the below conditions.
i. Adds an element in the end of list.
ii. Returns the index of first occurrence.
iii. Adds contents of list2 to the end of list1.
27. What is the output produced by following code?
obj = open("New.txt", "w")
obj.write("A poem by Paramhansa Yogananda")
obj.write("Better than Heaven or Arcadia")
obj.write("I love thee, O my India !")
obj.write("And thy love I shall give")
obj.write("To every brother nation that lives.")
obj.close()
obj1 = open("New.txt", "r")
s1 = obj1.read(48)
print(sl)
obj1.close()
[2]
OR
Read the code given below and answer the question:
fh = open ("main, txt", "w")
fh.write("Bye")
fh.close()
If the file contains "GOOD" before execution, what will be the contents of the file after
execution of this code?
28. Predict the output of the following code:
def first (s, i):
[2]

Section C
return s * second(i)
def second(n):
return n * 3
print(first('*', 2))
29. What is the difference between a local variable and a global variable? Also, give a
suitable Python code to illustrate both.
[3]
OR
Trace the flow of execution for following programs:
i. 1 def power(b., p):
2 r = b ** p
3 return r
4
5 def cpower(a):
6 a = a + 2
7 a = power(a, 0.5)
8 return a
9
10 n = 5
11 result = cpower(n)
12 print (result)
ii. 1. def increment(x)
2. x = x + 1
3.
4. # main program
5. x = 3
6. print(x)
7. increment(x)
8. print(x)
iii. 1. def increment(x):
2. z = 45
3. x = x + 1
4. return x
5.
6. # main

7. y = 3
8. print(y)
9. y = increment(y)
10. print(y)
11. q = 77
12. print(q)
13. increment(q)
14. print(q)
15. print(x)
16. print(z)
30. Give a suitable example of a table with sample data and illustrate Primary and
Alternate Keys in it.
[3]
OR
Write the output of the SQL queries (a) and (b) based on the following two tables
FLIGHT and PASSENGER belonging to the same database:
Table: FLIGHT
FNO DEPART ARRIVE FARE
F101 DELHI CHENNAI 4500
F102 DELHI BENGALURU 4000
F103 MUMBAI CHENNAI 5500
F104 DELHI MUMBAI 4500
F105 MUMBAI BENGALURU 5000
Table: FLIGHT
PNO NAME FLIGHTDATE FNO
P1 PRAKASH 2021-12-25 F101
P2 NOOR 2021-11-20 F103
P3 HARMEET 2020-12-10 NULL
P$ ANNIE 2019-12-20 F105
a. SELECT NAME, DEPART FROM FLIGHT
NATURAL JOIN PASSENGER;
b. SELECT NAME, FARE
FROM PASSENGER P, FLIGHT F

Section D
WHERE F.FNO = P.FNO AND F.DEPART = 'MUMBAI';
31. Write definition of a method OddSum(NUMBERS) to add those values in the list
of NUMBERS, which are not even.
[3]
OR
What are different types of arguments/parameters that a function can have?
32. A linear stack called status contains the following information:
Phone number of Employee
Name of Employee
Write the following methods to perform given operations on the stack status:
i. Push_element () To Push an object containing Phone number of Employee and
Name of Employee into the stack.
ii. Pop_element () To Pop an object from the stack and to release the memory.
[4]
OR
Write a program that depends upon the user's choice, either pushes or pops an element
in a stack.
33. Write a program with method countand() to count the word 'and' or 'And as an
independent word in a text file "status.txt". e.g. if the content of the file "status, txt"
is as follows:
Welcome to your one-step solutions for all your study, practice and assessment
needs for various competitive & recruitment examinations and school segment. We
have been working tirelessly for over a decade to make sure that you have best in
class study resources because you deserve SUCCESS AND NOTHING LESS...
Then the output of the program should be:
Count of _and_ in file is/are: 3
[4]
34. Write SQL queries for (i) to (iv) and find outputs for SQL queries (v) to (viii),
which are based on the table.
TABLE: ACCOUNT
ANO ANAME ADDRESS
101 Nirja Singh Bangalore
102 Rohan Gupta Chennai
[4]

103 Ali Reza Hyderabad
104 Rishabh Jain Chennai
105 Simian 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 2017-06-12
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'
OR
Give output for following SQL queries as per given table(s) :
Table : Books
Book_Id Book_Name Author_Name Publishers Price Type Qty.
F0001 The Tears
William
Hopkins
First publ. 750 Fiction 10

Section E
F0002 Thunderbolts
: Anna Roberts
i
Fist Publ. 700 Fiction 5
T0001 My first C++
Brian and
Brooke
EPB 250 Text 10
T0002
C++
Brainworks
A.W. Rossaine TDH 325 Text 5
C0001 Fast cook Lata Kapoor EPB 350 Cookery 8
Table : Issued
Book_Id Quantity_Issued
F0001 3
T0001 1
C0001 5
i. SELECT COUNT (DISTINCT Publishers) FROM Books.
ii. SELECT SUM(Price) FROM Books WHERE Quantity > 5.
iii. SELECT Book_Name, Author_Name FROM Books WHERE Price < 500.
iv. SELECT COUNT (*) FROM Books.
35. Consider the table product and client with structures as follows:
Product client
ProductName ClientName
Manufacturer City
Price P_ID
Write Python codes for the following:
i. To display the details of those clients whose city is Delhi.
ii. To display the details of products whose price is in range of 50 to 100 (Both
values included)
iii. To display the Client Name, City from table Client.
iv. To display the price of all the items by the manufacturer ABC.
v. To display the product name and 4 items its price from the product table.
[4]

36. Great Studies University is setting up its Academic schools at Sunder Nagar and
planning to set up a network. The university has 3 academic schools and one
administration centre as shown in the diagram below:
Center to center distances between various buildings is as follows:
Law School to Business School 60 m
Law School to Technology School 90 m
Law School to Admin Center 115 m
Business School to Technology School 40 m
Business School to Admin Center 45 m
Technology School to Admin Center 25 m
Number of Computers in each of the Schools/Center is as follows:
Law School 25
Technology School 50
Admin Center 125
Business School 35
i. Suggest the most suitable place (i.e., Schools/Center) to install the server of this
university with a suitable reason.
ii. Suggest the most efficient connecting medium for connecting these
Schools/center for wired connectivity.
iii. Which device you will suggest to be placed/installed in each of these Schools!
center to efficiently connect all the computers within these Schools/center?
iv. The university is planning to connect its admission office in the closest big city,
which is more than 350 km from the university. Which type of network out of
LAN, MAN or WAN will be formed? Justify your answer.
[5]
37. Write SQL commands for the queries (i) to (iv) and output for (v) to (viii) based on
the tables 'Watches' and Sale given below.
Watches
[5]

Watchid WatchName Price Type Qty_Store
W001 High Time 10000 Unisex 100
W002 Life Time 15000 Ladies 150
W003 Wave 20000 Gents 200
W004 High Fashion 7000 Unisex 250
W005 Golden Time 25000 Gents 100
Sale
Watchid Qty_Sold Quarter
W001 10 1
W003 5 1
W002 20 2
W003 10 2
W001 15 3
W002 20 3
W005 10 3
W003 15 4
i. TO DISPLAY ALL THE DETAILS OF THOSE WATCHES WHOSE NAME
ENDS WITH TIME.
ii. TO DISPLAY WATCH'S NAME AND PRICE OF THOSE WATCHES WHICH
HAVE PRICE RANGE IN BETWEEN 5000-15000.
iii. TO DISPLAY TOTAL QUANTITY IN-STORE OF UNISEX TYPE WATCHES.
iv. TO DISPLAY WATCH NAME AND THEIR QUANTITY SOLD IN the FIRST
QUARTER.
v. SELECT MAX (PRICE), MIN(QTY_STORE) FROM WATCHES;
vi. SELECT QUARTER, SUM(QTY_SOLD) FROM SALE GROUP BY
QUARTER;
vii. SELECT WATCHNAME, PRICE, TYPE FROM WATCHES W, SALE S
WHERE W. WATCHID!= S.WATCHID;
viii. SELECT WATCHNAME, QTYSTORE, SUM (QTYSOLD), QTY_STORE -
SUM (QTY_SOLD) "STOCK" FROM WATCHES W, SALE S WHERE W.
WATCHID = S.WATCHID GROUP BY S.WATCHID;

OR
Write SQL queries for (i) to (iv) and find outputs for SQL queries (v) to (viii), which
are based on the tables:
DVD
DCODE DTITLE DTYPE
F101 Henry Martin Folk
Cl 02 Dhrupad Classical
C101 The Planets Classical
F102 Universal Soldier Folk
R102 A day in the life Rock
MEMBER
MID NAME DCODE ISSUEDATE
101 AGAM SINGH R102 2017-11-30
103 ARTH JOSEPH F102 2016-12-13
102 NISHA HANS C101 2017-07-24
i. To display all details from the table MEMBER in descending order of ISSUEDATE.
ii. To display the DCODE and DTITLE of all Folk Type DVDs from the table DVD.
iii. To display the Dtype and number of DVDs in each DTYPE from the table DVD.
iv. To display all NAME and ISSUEDATE of those members from the table MEMBER
who have DVDs issued (i.e., ISSUEDATE) in the year 2017.
v. SELECT MIN (ISSUEDATE) FROM MEMBER;
vi. SELECT DISTINCT DTYPE FROM DVD;
vii. SELECT D.DCODE. NAME, DTITLE: FROM DVD D, MEMBER M WHERE
D.DCODE=M.DCODE;
viii. SELECT DTITLE FROM DVD WHERE DTYPE NOT IN ("Folk", "Classical");

Section A
1.
(b) False
Explanation:
False
2.
(d) Relations
Explanation:
Fields are the column of the relations
3.
(c) All of these
Explanation:
The data dictionary is structured in tables and views just like other database data.
4.
(b) None
Explanation:
When no value is returned by function in Python, it returns None object by default.
5. Price*Qty, class, 4thCol cannot be used for naming variables/functions in a Python
program:
6. (a) accepted
Explanation:
A checksum is a value used to verify the integrity of a file or a data transfer. In other
words, it is a sum that checks the validity of data. Checksums are typically used to
compare two sets of data to make sure they are the same.
7.
(c) dump(obj1.myfile)
Explanation:
The pickle.dump(obj1, myfile) line serializes the tuple obj1 and writes it to the file.
8. (a) Insert
Explanation:
Insert
9.
(b) ID
Solution
SAMPLE QUESTION PAPER - 4
Computer Science (083)
Class XII (2024-25)

Explanation:
ID, A primary key is a key that is unique for each record.
10. mkdir() method of the OS module is used to create a directory in the current directory. We
pass an argument to this method which contains the name of the directory to be created.
mkdir() method raise FileExistsError if the directory to be created already exists.
11.
(b) False
Explanation:
We can skip default parameters in the function call. They will take the default value
assigned to them in the function definition.
12. (a) push
Explanation:
The insertion operation in the stack is called push operation.
13. Data redundancy means having multiple copies of the same data in the database. It leads to
problems like wastage of space and data inconsistency.
14.
(d) domain name system
Explanation:
The domain names systems matches the name of website to ip addresses of the website.
15.
(b) B, D
Explanation:
B, D, In Python string is the collection of the characters surrounded by single quotes,
double quotes, or triple quotes.
16.
(b) BETWEEN
Explanation:
BETWEEN
17. (a) frequency modulation
Explanation:
frequency modulation is process of superimposing a low frequency signal over a high
frequency signal.
18. (a) RJ-45
Explanation:
Registered Jack 45 is an eight wired connector that is used to connect computers on a local
area network(LAN), especially Ethernet.

19.
(d) A is false but R is true.
Explanation:
Applying comparison operator on series works in vectorized way i.e applies this check on
each element and then return true/ false for each element.
20.
(d) A is false but R is true.
Explanation:
The os module provides the remove() method which is used to remove the specified file,
not the file pointer. The mkdir() method is used to create the directories in the current
working directory.
21.
(b) Both A and R are true but R is not the correct explanation of A.
Explanation:
The enumerate() is a buit-in function available with the Python that takes a collection (e.g.
a tuple) and returns it as an enumerated object. The enumerate() function adds a counter as
the key of the enumerated object.
Example :
students = ['X', 'Y' ,'Z']
students_list = enumerate(students)
print(list(students_list))
will print [(0, 'X'), (1, 'Y'), (2, 'Z')]
Section B
22. In a computer network, collision is a specific condition that occurs when two or more
nodes on a network transmit data at the same time. For example, if two computers on an
Ethernet network send data at the same moment, the data will "collide" and not finish
transmitting. In case of a collision, the data gets garbled and cannot be read. Also, it may
hamper the overall performance of the network as collisions often lead to more
retransmissions which clog the network and deteriorate the overall performance of the
network.
23. import mysql.connector
mycon = mysql.connector.connect(host = "localhost", user = "system",passwd = "hello",dat
cur = mycon.cursor()
db = cur.execute("CREATE TABLE Production(PID varchar (5) Primary key, PName char
mycon.close()
24. i. List

ii. String
OR
a = int(input("Enter a : "))
b = 0
c = a/b # Division by zero
Here, a/b will generate the run-time error.
25. Data types are the classification of data items. Data types represent a kind of value which
determines what operations can be performed on that data. Some common data types are
Integer, Float, Varchar, Char, String, etc.
Main objectives of datatypes are:
i. Optimum usage of storage space
ii. Represent all possible values
iii. Improve data integrity
26. v = 3 # v must be defined before being used
if v < 5:
for j in range(v):
print('ABC") # () missing for print()
else: # wrong indentation; else clause can either be for if
# or for for loop
print ( "XYZ” ) # () missing for print()
OR
i. append()
ii. index()
iii. extend()
27. The output produced by above code will be:
A poem by Paramhansa Yogananda Better than Heaven
OR
The content in the file will be "Bye" string only because when an existing file is opened in
write mode ("w"), the existing data in the file is truncated. So, "GOOD" string is truncated
when the file is opened in write mode.
28. Output of the code is:
******
first('*', 2) calls function first(), which calls second(2) function, then it returns 6 to first()
function. Therefore, prints * 6 times as output.
Section C
29. The differences between a local variable and a global variable are as given below :

Local Variable Global Variable
1. It is a variable which is declared within a
function or within a block
1. It is a variable which is declared
outside all the functions
2. It is accessible only within a function/block in
which it is declared
2. It is accessible throughout the
program
3.Local variables are created when the function
has started execution and are lost when the
function terminates.
3.Global variable is created as
execution starts and is lost when the
program ends.
For example, in the following code, x, xCubed are global variables and n and cn are local
variables.
def cube(n):
cn = n * n * n
return cn
x = 10
xCubed = cube(x)
print(x, "cubed is", xCubed)
OR
i. 1 5 10 11 5 6 7 1 2 3 7 8 11 12
ii. 1 5 6 7 1 2 8
[Control did not return to function call statement (7) as no value is being returned by
increment()]
iii. 1 7 8 9 1 2 3 4 9 10 11 12 13 1 2 3 4
14 15 16
[Control did not return to function call statement (13) as its result is not being stored
anywhere.]
30. Primary Key. It is the set of one or more attributes that can uniquely identify tuples
within a relation..
Alternate Key. It is a candidate key which is not the primary key.
Example:
Table : Class 11
AdmNo RollNo Name Marks
1011 1 Rahat 85
1083 2 Irfan 75
2011 3 Maya 63
1000 4 Shaun 60
→ → → → → → → → → → → → →
→ → → → → →
→ → → → → → → → → → → → → → → →
→ → →

999 5 Sukhi 92
1200 6 Zoya 86
In the above table, columns AdmNo and RollNo have unique values for each row, so both
are candidates to become primary keys. Hence both of these columns are Candidate keys.
Out of these two, we can assign one as Primary key and the other one will become
Alternate key.
Candidate keys: AdmNo, RollNo
Primary key: RollNo
Alternate key: AdmNo
OR
a. SELECT NAME, DEPART FROM FLIGHT
NATURAL JOIN PASSENGER;
NAME DEPART
PRAKASH DELHI
NOOR MUMBAI
ANNIE MUMBAI
b. SELECT NAME, FARE
FROM PASSENGER P, FLIGHT F
WHERE F.FNO = P.FNO AND F.DEPART = 'MUMBAI';
NAME FARE
NOOR 5500
ANNIE 5000
31. def OddSum(NUMBERS) :
odd_sum = 0
for num in range (len(NUMBERS)):
if (NUMBERS[num] % 2 != 0:
odd_sum = odd_sum + NUMBERS [num]
print odd_sum
OR
A function can have following types of arguments/parameters:
i. Positional (regular) arguments: These are the passed argument values in the actual
arguments, which are copied to formal arguments by their position in the function call.
That is, 1st argument value is given to the 1st parameter, 2nd argument's value is given
to the 2nd parameter and so on, e.g., in the following code, argument 5 will be given to
the parameter a and argument 7 will be given to the parameter b.

def add(a, b):
return a + b
add(5, 7)
ii. Default Arguments: These are the default values defined in the function definition for
a parameter. Python uses these defaults if corresponding actual arguments are not
passed in the function call, e.g., in the following code, the third argument is passed and
hence its default value 3 will be taken by the function for the third parameter c:
def add(a, b, c = 3):
return a + b + c
add(5, 7)
iii. Keyword Arguments: Also called named arguments, the Keyword arguments are
passed by it's name instead of their position as opposed to positional arguments in the
function call and the position of arguments is irrelevant when calling a function, e.g.,
def add(a, b):
return a + b
add(b = 5, a = 7)
Section D
32. def Push_element(Status, Top):
phone_no = int(input("Enter phone number:"))
emp_name = input("Enter employee name:")
St = (phone_no, emp_name)
Status.append(St)
Top = Top + 1
return Top
def Pop_element(Status, Top):
Slen = len(Status)
if (Slen <= 0):
print("Status is empty")
else:
phone_no, emp_name = Status.Pop()
Top = Top-1
print("Phone number %s and name %s deleted"%(phone_no, emp_name))
return Top
OR
push and pop operation into the stack:-

MAX_SIZE = 1000
stack = [0 for i in range(MAX_SIZE)] -
top = 0
def push():
global stack, top
x = int( input ("Enter element to push into stack: " ))
if top >= MAX_SIZE:
print("Cannot push. Stack is full. Overflow!")
else:
stack[top] = x
top += 1
def pop():
global stack, top
if top == 0:
print("Cannot pop. Stack is empty. Underflow!")
else:
top -= 1
def printStack():
print(stack[:top])
# __main__
while True:
print("Please choose operation")
print("1. Push")
print("2. Pop")
print("3. Print")
print("4. Exit")
choice = int(input("Please enter 1/2/3 : " ))
if choice == 4:
break
elif choice == 3:
printStack()
elif choice == 2:
pop( )
elif choice == 1:

push()
else:
print("Please give a correct input")
33. import os
def countand():
if os.path.isfile("status.txt"):
fob=open("status.txt", 'r')
c=0
while True:
Str=fob.readline()
if not Str:
break
Str=Str.rstrip().lower().split()
for i in range(len(Str)):
if(Str[i]=='and' or Str[i]== 'AND'):
c=c+1
print("Count of_and_in file is/are: ", c)
else:
print("File does not exist")
countand()
34. i. SELECT * FROM TRANSACT WHERE TYPE = 'Deposit' ;
ii. SELECT ANO , AMOUNT FROM TRANSACT WHERE DOT > = ' 2017-10-01 'AND
DOT < = '2017-10-31'
iii. SELECT DOT FROM TRANSACT WHERE ANO = 103 ORDER BY DOT DESC
LIMIT =1;
iv. SELECT A.ANO, ANAME, DOT FROM ACCOUNT A, TRANSACT T
WHERE A.ANO = T.ANO AND AMOUNT <= 3000;
v. ANO ANAME
103 Ali Reza
105 Simran Kaur
vi. DISTINCT ANO
101
102
103
vii. ANO COUNT(*) MIN(AMOUNT)

101 2 2500
103 2 1000
viii. COUNT (*) SUM(AMOUNT)
2 5000
OR
i. COUNT (DISTINCT Publishers)
3
ii. SUM(Price)
1350
iii. Book_Name Author_Name
My first C++ Brian and Brooke
C++Brainworks A.W. Rossaine
Fast cook Lata Kapoor
iv. COUNT (*)
5
35. i. import MySQLdb
db= MySQLdb.connect('localhost', 'Admin','Admin@pwd', 'cosmetics')
cursor=db.cursor()
sql= """Select*from client where city=%s"""
city_query= ('Delhi')
try:
cursor.execute (sql, city_query)
results = cursor.fetchall()
print "Client ID, Name City Product"
For row in results:
CID = row[0]
CName = row[1]
CCity = row[2]
CProd = row[3]
prints "%s %s %s %s" % (CID, CName, CCity, CProd)
except
print "Error: unable to fetch data"
cursor.close()
db. close ()

ii. import MySQLdb
db=MySQLdb.connect('localhost', 'Admin', 'Admin@pwd', 'cosmetics')
cursor= db.cursor()
sql= ""select * from Product where Price BETWEEN %F to %F"""
value = (50,100)
try:
cursor.execute(sql, value)
results = cursor.fetchall()()
print "ID Product Name Manufacturer Price"
For row in results:
PID = row[0]
PName = row[1]
PManu = row [2]
PPrice = row [3]
print " %s %s %s %s", % (PID, PName, PManu, PPrice)
print (cursor.rowcount; "Records Found")
except:
print ( "Error unable to Fetch data")
cursor.close()
db.close()
iii. import MySQLdb
db = MySQLdb.connect('localhost', 'Admin', 'Admin@pwd', 'cosmetics')
cursor= db.cursor()
sql= """select ClientName, City From Client"""
try:
cursor.execute(sql)
results = cursor.fetchall()
print "ClientName","City"
For row in results:
print "%s %s", % (row[0], row[1])
print (cursor.rowcount, "Records Found")
except:
print ("Error unable to Fetch data")
cursor. close()
db.close()
iv. import MySQLdb
db = MySQLdb.connect('localhost', Admin', Admin@pwd', 'cosmetics')

cursor= db. cursor (buffered= TRUE)
sql=""" select price From Product where
Manufacturer = %s"""
query_value= ('ABC',)
try:
cursor.execute(sql, query_value)
results — cursor.fetchall()
print "Price of Items by %s", % (query_value)
For row in results:
print rowT[0]
print (cursor.rowcount, "Items listed")
except:
print "Error unable to Fetch data"
cursor.close()
db.close()
v. import MySQLdb
db = MySQLDb.connect(Tocalhost', 'Admin', 'Admin@pwd', 'cosmetics')
cursor = db.cursor()
sql = """Select ProductName, Price *4 From Product"""
try:
cursor.execute(sql)
results = cursor. fetchall()
print "ProductName",''Price"
For row in results:
print "%s %s" % (row[0], row[1])
print (cursor.rowcount "Records found")
except:
print ("Unable to fetch data")
cursor. close()
db.close()
Section E
36. i. The most suitable place to install the server is Admin Centre because it has maximum
number of computers. (using 80-20 rule).
ii. Fibre optic cable
iii. Switch
iv. WAN because LAN and MAN cannot span more than 100 km.
37. i. SELECT * FROM WATCHES WHERE WATCHNAME LIKE '%TIME';

ii. SELECT WATCHNAME, PRICE FROM WATCH WHERE PRICE BETWEEN 5000
AND 15000;
iii. SELECT SUM (QTY STORE) FROM WATCHES WHERE TYPE LIKE 'Unisex';
iv. SELECT WATCHNAME, QTY SOLD FROM WATCHES W, SALE S WHERE
W.WATCHID = S.WATCHID AND QUARTER = 1;
v. max (price) min(qty_store)
25000 100
vi. quarter sum(qty_sold)
1 15
2 30
3 45
4 15
vii. watchname price type
HighFashion 7000 Unisex
viii. watchname qty_store qty_sold Stock
HighTime 100 25 75
Wave 200 30 170
LifeTime 150 40 110
Golden time 100 10 90
OR
i. SELECT * FROM MEMBER ORDER BY ISSUEDATE DESC
ii. SELECT DCODE, DTITLE FROM DVD WHERE DTYPE = 'Folk'
iii. SELECT DTYPE, COUNT(*) FROM DVD GROUP BY DTYPE
iv. SELECT NAME, ISSUEDATE FROM MEMBER, WHERE ISSUEDATE LIKE
'2017%'
v. MIN (ISSUEDATE) 2016-12-13
vi. DISTINCT (DTYPE)
Folk
Classical
Rock
vii. DCODE name DTITLE
R102 AGAM SINGH A day in the life
F102 ARTH JOSEPH Universal Soldier

C101 NISHA HANS The Planets
viii. DTITLE
A day in the life

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