Data Handling || Sumita Arora || Class 11 || Practical || Computer Science || Solution

Data Handling || Sumita Arora || Class 11 || Practical || Computer Science || Solution

PIP 3.1: -

Q1. Using value 12, create data (that contains 12 in it) of following types. Give at least two examples for each type of data. Check type of each of your example using type () function, e.g., to check the type of 3.0, you can type on Python prompt: type (3.0).

(Hint: 3 is integer but 3.0 is floating point number.)

(a) Integer

(b) Floating point number

(c) Complex number

Q2. In a Python Shell, (on the Python prompt) assign the following data to different variables namely var1, var2, var3, var4 and so on respectively.

(DO NOT ADD OR REMOVE QUOTES FROM THE DATA GIVEN BELOW)

True, 'True', False, 'False', 'true', true, 'false', false

Log in the following table the result returned by Python after each assignment.

(Note: First try in a Python Shell and then fill the following table.)

S.No Value Assignment Statement to assign the value to a variable What Python returned?

1. True

2. 'True'

3. False

4. 'False'

5. "true"

6. true

7. 'false'

8. false

Q3. For each of the following data value, find the type, id and value (the three internal key-attributes of an object).

Q4. Type the following statements and give the output in the space given below.

[You should be able to explain to your teacher about why some statements are yielding the same result and why some are giving different result?]

Statements Result Returned by Python Shell

1. a = 18

2. b = 7

3. c = b + 11

4. d = c - 11

5. id (7)

6. id (18)

7. id (a)

8. id (b)

9. id (c)

10. id(d)

11. d = 25 - b

12. id(d)

13. string1 = ‘Python’

14. string2 = string

15. id (string)

16. id (string2)

17. type (string1)

18. type (string2)

19. string3 = 'hello'

20. id (string3)

21. num1 = 1 + 0j

22. num2 = 1

23. type(num1)

24. type(num2)

25. id(num1)

26. id(num2)

P.I.P: - 3.2

Perform questions 1, 2, 3 in INTERACTIVE MODE and questions 4, 5, 6 in SCRIPT MODE.

Assign the given values to variable names shown here:

Q1. Arithmetic Operators' practice: (Interactive mode)

x = 29.0, y = 13, z = 2, p = 0.5, q = 12.79, i = 13, j = 29.0, k = y - 11

S. No. Reason Result Reason

1 x  / y

2 x // 4

3 y - i + p

4 y ** z

5 y ** p

6 y  %  z

7 x / j

8 q  %  p

9 y + z % 4

10 (y + z) % 4

11 y + (z * 4)

12 y * x / z

13 y / x * z

14 R = p + z - x / y * y **z // x % (p + z)

15 4** 3 ** z

Q2. Relational Operators' practice: (Interactive mode)

x = 29.0, y = 13, z = 2, p = 0.5, q = 12.79, i = 13, j = 29.0, k = y - 11, a = ''(empty string), b = '', c = 'great', d = 'Great', e = 'GREAT', f = 'Great', g = 'GREAT', h = 'great', l = (3 + 4.5j), m = (3 + 4.5j)

S. No. Expression Result Reason

1 y > p * 26

2 (y > p) * 26

3 x <= y < x + y

4 x // y < p * 20

5 x != y * z + 3

6 x == y * z+3

7 x - 3 != y * 2

8 x - (3 != y) * 2

9 a == b

10 c == d

11 d == g

12 f == d

13 e == g

14 h == c

Q3. Identify Operators Practice (Interactive mode)

x = 29.0, y = 13, z = 2, p = 0.5, q = 12.79, i = 13, j = 29.0, k = y - 11, a = ''(empty string), b = '', c = 'great', d = 'Great', e = 'GREAT', f = 'Great', g = 'GREAT', h = 'great', l = (3 + 4.5j), m = (3 + 4.5j)

S. No. Expression Result Reason

1 y == 13

2 y == i

3 y is i

4 g == e

5 g == e

6 e is not g

7 k == z

8 z is not k

9 l == m

10 l is m

Q4. Logical Operators' practice (Interactive mode)

x = 29.0, y = 13, z = 2, p = 0.5, q = 12.79, i = 13, j = 29.0, k = y - 11, a = ''(empty string), b = '', c = 'great', d = 'Great', e = 'GREAT', f = 'Great', g = 'GREAT', h = 'great', l = (3 + 4.5j), m = (3 + 4.5j)

S. No. Expression Result Reason

1 x > y and y > z

2 x > y or y > z

3 not x > y

4 not x > y or y > z

5 not (x > y or y > z)

6 x - y * 2 > y * 2 or y * p > y

7 x - y * 2 > y * 2 and y * p > y

8 not x - y * 2 > y *2 and y * p > y

9 not (x - y * 2 > y *2 and y * p > y)

10 x - y * 2 > y * 2 and not y * p > y

11 x - y * 2 > y * 2 or not y * p > y

12 x > y > z

13 i < j > k

14 y & z

15 y | z

16 y ^ z

17 ~ y

Q5. Create two more variables r and s as r = 0 and s = 0.0 and practice the following expressions.

x = 29.0

y = 13

z = 2

p = 0.5

q = 12.79

S. No. Expression Result Reason

1 r and p

2 p and r

3 p and q

4 q and p

5 r or p

6 p or r

7 p or z

8 z or p

9 p or q

10 q or p

11 not q or p

12 a and not q

13 s and x

14 not s and x

15 z or s

16 s or z

17 z - 2 or s

18 s or z - 2

19 z + 2 or s

20 s or z + 2

Q6. Practice the following expressions:

a = ''(empty string), b = '', c = 'great', d = 'Great', e = 'GREAT', f = 'Great', g = 'GREAT', h = 'great'

S. No. Expression Result Reason

1 a or c

2 c or a

3 a and c

4 c and a

5 f == g or f == d

6 f or g

7 f or d

8 d or f

9 c == h and e == g

10 a and g

11 c or g

12 g or c

13 g and a

14 a or g

15 g or a

Q7. What is the difference between , a + 1 and a += 1 and a = a + 1 ? To find out, execute the following code fragments and write your answer below:

Fragment 1

a = 20

a + 1

print (a)

Fragment 2

a = 20

a += 1

print (a)

Fragment 3

a = 20

a = a + 1

print ()

Q8. Predict the output of following code:

num = 20.5

z = 3

result = 2 + z * z ** 3 + num // z

print (result)

(a) Firstly, determine the answer without running the code and write.

(b) Now type the above code in script mode and test-run the program. Write below the result given by Python.

Q9. Write a program to read a floating point number n. Print n, n2, n3, n4 and n5.

Q10. Write a program that calculates the volume and surface area of a sphere. The program must first ask the user to key in a radius value, r, before it performs the calculations. The program should display the result of the calculations. Save the program as "sphere.py".

P.I.P: - 3.3

Q2. Evaluate the following expression (stepwise) on paper first. Then execute it in Python shell.

Compare your result with Python's. State reasons

4 * len ("Problem1") / (len ("Python") % 3) + 2.0

Find out the final output and its type.

Q3. Evaluate the following expression (stepwise) on paper first. Then execute it in Python shell. Compare your result with Python's. State reasons; find out the final output and its type.

Q4. Write a short program that asks for your height in centimeters and then converts your height to feet and inches. (1 foot -12 inches, 1 inch = 2.54 cm)

Q5. Write a program to find the area of a triangle using formula 1 / 2 * base * height.

Q6. Write a program to read two numbers and print their quotient and remainder.

Q7. Write a program to compute simple interest and compound interest.