NCERT solutions for Informatics Practices [English] Class 11 chapter 3 - Brief Overview of Python [Latest edition]

Which of the following identifier name are invalid and why?

Serial_no

Which of the following identifier name are invalid and why?

1st_Room

Which of the following identifier name are invalid and why?

Hundred$

Which of the following identifier name are invalid and why?

Total Marks

Which of the following identifier name are invalid and why?

Total_Marks

Which of the following identifier name are invalid and why?

total-Marks

Which of the following identifier name are invalid and why?

_Percentage

Which of the following identifier name are invalid and why?

True

Write the corresponding Python assignment statement:

Assign 10 to variable length and 20 to variable breadth.

Write the corresponding Python assignment statement:

Assign the average of values of the variable's length and breadth to a variable sum.

Write the corresponding Python assignment statement:

Assign a list containing strings ‘Paper’, ‘Gel Pen’, and ‘Eraser’ to variable stationery.

Write the corresponding Python assignment statement:

Assign the strings ‘Mohandas’, ‘Karamchand’, and ‘Gandhi’ to variables first, middle and last.

Write the corresponding Python assignment statement:

Assign the concatenated value of string variables first, middle, and last to variable fullname. Make sure to incorporate blank spaces appropriately between different parts of names.

Which data type will be used to represent the following data values and why?

Number of months in a year

Which data type will be used to represent the following data values and why?

A resident of Delhi or not

Which data type will be used to represent the following data values and why?

Mobile number

Which data type will be used to represent the following data values and why?

Pocket money

Which data type will be used to represent the following data values and why?

Volume of a sphere

Which data type will be used to represent the following data values and why?

Perimeter of a square

Which data type will be used to represent the following data values and why?

Name of the student

Which data type will be used to represent the following data values and why?

Address of the student

Give the output of the following when num1 = 4, num2 = 3, num3 = 2.

num1 += num2 + num3
print (num1)

Give the output of the following when num1 = 4, num2 = 3, num3 = 2.

num1 = num1 ** (num2 + num3)
print (num1)

Give the output of the following when num1 = 4, num2 = 3, num3 = 2.

num1 **= num2 + num3

Give the output of the following when num1 = 4, num2 = 3, num3 = 2.

num1 = '5' + '5'
print(num1)

Give the output of the following when num1 = 4, num2 = 3, num3 = 2.

print(4.00 / (2.0 + 2.0))

Give the output of the following when num1 = 4, num2 = 3, num3 = 2.

num1 = 2 + 9 * ((3 * 12) - 8)/10
print(num1)

Give the output of the following when num1 = 4, num2 = 3, num3 = 2.

num1 = float(10)
print (num1)

Give the output of the following when num1 = 4, num2 = 3, num3 = 2.

num1 = int('3.14')
print (num1)

Give the output of the following when num1 = 4, num2 = 3, num3 = 2.

print(10 != 9 and 20 >= 20)

Give the output of the following when num1 = 4, num2 = 3, num3 = 2.

print(5 % 10 + 10 < 50 and 29 <= 29)

Categorize the following as syntax error, logical error, or runtime error:

25 / 0

Categorize the following as syntax error, logical error, or runtime error:

num1 = 25; num2 = 0; num1/num2

Write a Python program to calculate the amount payable if money has been lent on simple interest. Principal or money lent = P, Rate of interest = R% per annum and Time = T years. Then Simple Interest (SI) = (P × R × T)/100.

Amount payable = Principal + SI.

P, R, and T are given as input to the program.

Write a program to repeat the string ‘‘GOOD MORNING” n times. Here ‘n’ is an integer entered by the user.

Write a program to find the average of three numbers.

Write a program that asks the user to enter their name and age. Print a message addressed to the user that tells the user the year in which they will turn 100 years old.

What is the difference between the else and elif construct of the if statement?

Find the output of the following program segment:

for i in range(20,30,2):
         print(i)

Find the output of the following program segment:

country = 'INDIA'
for i in country:
      print (i)

Find the output of the following program segment:

i = 0; sum = 0
while i < 9:
        if i % 4 == 0:
               sum = sum + i
        i = i + 2
print (sum)

Schools use the “Student Management Information System” (SMIS) to manage student-related data. This system provides facilities for:

• recording and maintaining the personal details of students.
• maintaining marks scored in assessments and computing results of students.
• keeping track of student attendance.
• managing many other student-related data. Let us automate this process step by step.

Identify the personal details of students from your school identity card and write a program to accept these details for all students of your school and display them in the following format.