PYTHON PATTERN CODING

 PATTERN CODING (PYTHON)

# 1. Pyramid pattern of numbers

rows = 10

for i in range(1, rows + 1):

    for j in range(1, i + 1):

        print(j, end='  ')

    print(' ')

OUTPUT

1   

1  2   

1  2  3   

1  2  3  4   

1  2  3  4  5   

1  2  3  4  5  6   

1  2  3  4  5  6  7   

1  2  3  4  5  6  7  8   

1  2  3  4  5  6  7  8  9   

1  2  3  4  5  6  7  8  9  10   

# 2. Reverse pattern for loop from 7 to 1

rows = 7

n = 0

for i in range(rows, 0, -1):

    n += 1

    for j in range(1, i + 1):

        print(n, end=' ')

    print('\r')

OUTPUT

1 1 1 1 1 1 1 

2 2 2 2 2 2 

3 3 3 3 3 

4 4 4 4 

5 5 5 

6 6 

7 

# 3. Inverted Pyramid pattern with the same digit

rows = 7 #You can use any number like 8, 9, 4 etc.

num = rows

# reverse for loop

for i in range(rows, 0, -1):

    for j in range(0, i):

        print(num, end=' ')

    print("\r")

OUTPUT

7 7 7 7 7 7 7 

7 7 7 7 7 7 

7 7 7 7 7 

7 7 7 7 

7 7 7 

7 7 

7 

# 4. Another reverse number pattern (8 to 1)

rows = 8

for i in range(0, rows + 1):

    for j in range(rows - i, 0, -1):

        print(j, end=' ')

    print()

OUTPUT

8 7 6 5 4 3 2 1 

7 6 5 4 3 2 1 

6 5 4 3 2 1 

5 4 3 2 1 

4 3 2 1 

3 2 1 

2 1 

1 

# 5. Print other reverse number from 10 to 1

start = 1

stop = 2

current_num = stop

for row in range(2, 6):

    for col in range(start, stop):

        current_num -= 1

        print(current_num, end=' ')

    print("")

    start = stop

    stop += row

    current_num = stop

OUTPUT

1 

3 2 

6 5 4 

10 9 8 7 

# 6. Number triangle pattern

rows = 10

for i in range(1, rows):

    num = 1

    for j in range(rows, 0, -1):

        if j > i:

            print(" ", end=' ')

        else:

            print(num, end='  ')

            num += 1

    print(" ")

OUTPUT

                 1   

                1  2   

              1  2  3   

            1  2  3  4   

          1  2  3  4  5   

        1  2  3  4  5  6   

      1  2  3  4  5  6  7   

    1  2  3  4  5  6  7  8   

  1  2  3  4  5  6  7  8  9  

# 7. Pyramid pattern of stars in python

rows = 8

for i in range(0, rows):

    for j in range(0, i + 1):

       print("*", end=' ')

    print("\r")

OUTPUT

* 

* * 

* * * 

* * * * 

* * * * * 

* * * * * * 

* * * * * * * 

* * * * * * * * 

Python Programs

Python Programs

 # 1. Simple Addition, Subtraction, Multiplication and Division in Python by Input Method

a=int(input('Enter the First Number :'))

b=int(input('Enter the Second Number :'))

# For Addition

sum = a + b

print('Sum of two numbers : ', sum)

# For Subtraction

sub = a - b

print('Subtraction :', sub)

# For Multiplication

mul=a*b

print('Multiply a and b :', mul)

# For Division

div = a/b

print('Division :', div)

Output:

Enter the First Number :10

Enter the Second Number :5

Sum of two numbers :  15

Subtraction : 5

Multiply a and b : 50

Division : 2.0

# 2. WAP to obtain three numbers and print their sum.

x = int(input('Enter the first number :'))

y = int(input('Enter the second number :'))

z = int(input('Enter the third number :'))

sum = x+y+z

print('Sum of thre numbers are : ', sum)

Output:

Enter the first number :50

Enter the second number :40

Enter the third number :60

Sum of thre numbers are :  150

# 3. WAP to obtain length and breadth of a rectangle and calculate its area.

length = float(input('Enter the length :'))

breadth = float(input('Enter the breadth :'))

Area = length * breadth

print('Area of Rectangle :', Area)

Output:

Enter the length :5.5

Enter the breadth :7.8

Area of Rectangle : 42.9

# 4.WAP to calculate Body Mass Index (BMI) of a person.

weight = float(input('Enter the person weight in kg. : '))

height = float(input('Enter the person height in meters :'))

#Formula

BMI = weight/(height*height)

print('BMI of a person is :', BMI)

Output:

Enter the person weight in kg. : 50

Enter the person height in meters :1.8

BMI of a person is : 15.432098765432098

# 5. WAP to input a number and print its cube.

a = int(input('Enter any number :'))

cube = a*a*a

print('Cube of', a, 'is :', cube)

Output:

Enter any number :5

Cube of 5 is : 125

# 6. WAP to input two numbers and swap them.

a = int(input('Enter the first number :'))

b= int(input('Enter the second number :'))

print('Your Original number  :', a , b)

a, b = b, a

print('After swapping:', a, b)

Output:

Enter the first number :10

Enter the second number :20

Your Original number  : 10 20

After swapping: 20 10

# 6. WAP to find the average of five numbers.

a = int(input('Enter the first number :'))

b = int(input('Enter the second number :'))

c = int(input('Enter the third number :'))

d = int(input('Enter the fourth number :'))

e = int(input('Enter the fifth number :'))

avg = (a+b+c+d+e)/5

print('Average of five numbers :', avg)

Output:

Enter the first number :60

Enter the second number :65

Enter the third number :70

Enter the fourth number :80

Enter the fifth number :82

Average of five numbers : 71.4

# 7.Print Multiplication Table

def print_multiplication_table(n):

    for i in range(1, 11):

        for j in range(1, n+1):

            print(i*j, end='\t')

        print()

mul = int(input("Enter the number you want the table for :"))

print_multiplication_table(mul)

Output:

Enter the number you want the table for :10

1 2 3 4 5 6 7 8 9 10

2 4 6 8 10 12 14 16 18 20

3 6 9 12 15 18 21 24 27 30

4 8 12 16 20 24 28 32 36 40

5 10 15 20 25 30 35 40 45 50

6 12 18 24 30 36 42 48 54 60

7 14 21 28 35 42 49 56 63 70

8 16 24 32 40 48 56 64 72 80

9 18 27 36 45 54 63 72 81 90

10 20 30 40 50 60 70 80 90 100

INFORMATICS PRACTICES (C-11) 2022-23

 CLASS - XI

INFORMATICS PRACTICES (065)

SAMPLE QUESTION PAPER (2022 – 23)

Max Marks: 70                                                                                                                                                                                  Time: 3 Hrs.

General Instructions:

1. This question paper contains 3 parts A, B and C . Each part is compulsory.
2. Section A contains 25 questions 1 mark each.
3. Section B contains 10 questions 2 mark each.
4. Section C contains 5 questions 5 mark each.

SECTION - A
1	Python use a/an _______ to convert source code to object code. a. Interpreter b. Compiler c. Combination of Interpreter and compiler d. Special virtual engine
Ans	(a) Interpreter
2	Fill in the blanks: __________ refers to the ability of a machine or a computer program to think, learn and evolve. Big Data Grid Computing Artificial Intelligence Blockchain Technology
Ans	Artificial Intelligence
3	Which of the following is not a component of SQL? a.       DDL b.      DML c.       TCL d.      ADL
Ans	ADL
4	Number of attributes in a relation is called ___________. Size degree cardinality weight
Ans	degree
5	________ technology makes users feel as if they truly are in a virtual environment. a.       NLP b.      AR c.       VR d.      ML
Ans	VR
6	Intelligent sensors that can convert and process quantities digital are __________ sensors. a.  Cloud b. AI c. Grid d. Smart
Ans	AI
7	Which of the following is not a cloud service? a. IaaS b. PaaS c. SaaS d. DaaS
Ans	DaaS
8	Extremely large sets of data are________. a. database b. big data c. cloud computers d. None of these
Ans	Big data
9	Which of these is an example of cloud storage? Google Drive Microsoft Azure iCloud All of these
Ans	All of these
10	Data items having fixed value are called_______. Identifiers Functions Keywords Literals
Ans	(d) Literals
11	Which of the following attributes can be considered as a choice for primary key? Name Street Roll No Subject
Ans	Roll No
12	What does DDL stand for? Dynamic Data Language Detailed Data Language Data Definition Language Data Derivation Language
Ans	Data Definition Language
13	What will the following code produce? a=8.6 b=2 print( a / / 2 )   (a) 4.3 (b) 4.0 (c) 4 (d) Compilation error
Ans	(b) 4.0
14	A file based system is also called a. flat file b. serial file c. float database d. unrelational file
Ans	Flat file
15	Which amongst the following is not an example of browser? Firefo Avast Edge Chrome
Ans	Avast
16	SQL stands for _________
Ans	Structured Query Language
17	To remove duplicate rows from the result of a query, specify the SQL qualifier _______ in select list.
Ans	DISTINCT
18	A data _________ is a set of rules that define valid data. a. Constraint b. Data Dictionary c. Query d. All of these
Ans	Constraint
19	Function range(3) is equivalent to: (a) [0, 1, 2] (b) [0, 1, 2, 3] (c) [1, 2, 3] (d) [0, 2]
Ans	(a) [0, 1, 2]
20	The term ________ is used to refer to a row. a. Attribute b. Tuple c. Field d. Instance
Ans	Tuple
21	What is the purpose of the SQL AS clause? a. The AS SQL clause is used to change the name of a column in the result set or to assign a name to a derived column b. The AS clause is used with the JOIN clause only c. The AS clause defines a search condition d. All of the mentioned.
Ans	(a)
22	Which of the following is a legal expression in SQL? a. SELECT NULL FROM SALES ; b. SELECT NAME FROM SALES ; c. SELECT * FROM SALES WHEN PRICE = NULL ; d. SELECT # FROM SALES ;
Ans	b. SELECT NAME FROM SALES ;
23.	The COUNT function in sql returns the number of ________ a. Value b. Distinct Values c. Group By d. Columns
Ans	a. Value
24.	To obtain all columns, use a(n) …………………… instead of listing all the column names in the select list. a. & b. Dollar ($) c. Hash (#) d. Asterisk (*)
Ans	d. Asterisk (*)
25.	Write the output of the following SQL command: SELECT ROUND(49.88) ; a. 49.88 b. 49.8 c. 49.0 d. 50
Ans	d. 50
26	What will be the output of following code?   mysql> SELECT CONCAT (CONCAT (‘Inform’, ‘atics’), ‘Practices’) ;
Ans	Informatics Practices
27	Write commands to display the system date.
Ans	SELECT CURDATE() ;
28	What is the output produced when this code executes? a=0 for i in range(4, 8) :           if i%2:                 a=a+i print(a)
Ans	12
29	Deepika wants to remove all rows from the table BANK. But she needs to maintain the structure of the table. Which command is used to implement the same?
Ans	DELETE FROM BANK ;
30	Create table ‘Employee’ with the following structure:   Name of column ID First_Name Last_Name User_ID Salary Type Integer Varchar(30) Varchar(30) Varchar(10) Float
Ans	Create table employee(ID int(5), First_Name varchar(30), Last_Name varchar(30), User_ID varchar(10), Salary float);
31	Write a program to print the table of a given number. The number has to enter by the user.
Ans	n=int(input(‘Enter number:’)) for i in range(1, 11):        print(n, ‘x’, ‘i', ‘=’, (n*i))
32	Program to obtain three number and print their sum.
Ans	a = int(input("Enter first number:")) b = int(input("Enter Second number:")) c = int(input("Enter Third number:")) sum = a + b + c print("Three numbers are: ", a, b, c) print("Sum is :", sum)
33	Differentiate between CHAR and VARCHAR?
Ans	The difference b/w CHAR and VARCHAR is that of fixed length and variable length. The CHAR datatype specifies a fixed length character string. When a column is given datatype as CHAR(n), then MySQL ensures that all values stored in that column have this length i.e., n bytes. If a value is shorter than this length n then blanks are added, but the size of value remains n bytes. VARCHAR, on the other hand, specifies a variable length string. When a column is given datatype as VARCHAR(n), then the maximum size a value in this column can have is n bytes. Each value that is stored in this column stores exactly as you specify it i.e., no blank are added if the length is shorter than maximum length n. However, if you exceed the maximum length n, then an error message is displayed.
34	Define Data types. What are the main objectives of datatypes?
Ans	Data types is defined as a set of values along with the operations that can be performed on those values. Some common data types are : Integer, float, varchar, char, string etc. Main objectives of data types are: ·         Optimum usage of storage space. ·         Represent all possible values. ·         Improve data integrity.
35	What is foreign key?
Ans	A foreign key is a column or group of columns in a relational database table that provides a link between data in two tables.
36	Program to print elements of a list [‘q’, ‘w’, ‘e’, ‘r’, ‘t’, ‘y’] in separate lines along with element’s both indexes (positive and negative).
Ans	L =  [‘q’, ‘w’, ‘e’, ‘r’, ‘t’, ‘y’] length = leng(L) for a in range(length):      print("At indexes", a,  "and", (a-length), "element:", L[a])
37	Table “Order” is shown below. Write commands in SQL for (i) to (iv) and output for (v). Table: Orders ORDERID ORDERDATE SALESPERSON ORDERAMOUNT O101 2015-09-12 Ravi Kumar 34000 O102 2015—08-15 Rashmi Arora 50000 O103 2015-11-01 Ravi Kumar 55000 O104 2015-12-09 Manjeet Singh 60000 O105 2015-11-10 Rashmi Arora 50000   Solve the following queries:         i.To display names of SalesPersons (without duplicates)         ii. To list orderedID and respective OrderAmont in descending order of OrderAmount.         iii. To count the number of orders booked by SalesPerson with names starting with ‘R’.          iv.   To list order ids, order dates and order amounts that were booked after 1st September 2015.         v.  SELECT ORDERID, ORDERAMOUNT FROM ORDER WHERE ORDERAMOUNT BETWEEN 50000 to 70000.
Ans	Check blog MySQL questions
38	Consider the following table ‘GAMES’. Table : GAMES GCode GameName Type Number PrizeMoney ScheduleDate 101 Carrom Board Indoor 2 5000 23-Jan-2004 102 Badminton Outdoor 2 12000 12-Dec-2003 103 Table Tennis Indoor 4 8000 14-Feb-2004 105 Chess Indoor 2 9000 01-Jan-2004 108 Lawn Tennis Outdoor 4 25000 10-Mar-2004   Write SQL commands to: To display the name of all GAMES with their GCodes. To display the content of the GAMES table in ascending order of ScheduleDate. To display sum of PrizeMoney for each type of GAMES.
Ans	SELECT GAMENAME, GCODE FROM GAMES ; SELECT *  FROM GAMES ORDER BY SCHEDULEDATE ; SELECT SUM(PRIZEMONEY), TYPE FROM GAMES GROUP BY TYPE ;
39	What is cloud computing? Explain.
Ans	Cloud computing describes the act of storing managing and processing data online, as opposed to on a physical computer or network. In other words, cloud computing is the delivery of computing services such as servers, storage, database, networking, software, analytics etc. over the Internet.
40	Write a program to create a phone dictionary for all your friends and print each key value pair in separate lines.
Ans:	PhoneDict = {"Manav" : 548545, "Sumit" : 745856,                    "Dipendra" : 548545, "Ravi" : 549584 } for name in PhoneDict :      print(name, " : ", PhoneDict[name])