CHAPTER 4 – VERY ABLE VARIABLES

MULTIPLE CHOICE QUESTIONS

1. What will be the output of the following code?

x = 7
y = 3
x = x + y
y = x - y
x = x - y
print(x, y)

a. 7 3
b. 3 7
c. 10 4
d. Error

2. Consider this code:

a = "5"
b = 2
print(a * b)

What will be the output?
a. 7
b. 10
c. 55
d. 55 (string repeated)

3. If we run the following code:

p = 10
q = 3
print(p / q, p // q, p % q)

What will be displayed?
a. 3.3, 3, 1
b. 3.33, 3, 1
c. 3.3, 3.0, 1.0
d. Error

4. Which of the following variable names is valid in Python?
   a. break
   b. user@name
   c. _totalMarks
   d. my name

5. What will be the output of this program?

x = 2
y = 5
z = x ** y // y
print(z)

a. 32
b. 6
c. 12
d. 10

FILL IN THE BLANKS

1. Variables that are declared inside a function are called __________ variables.
2. The // operator always gives the __________ part of division.
3. In Python, variable names are __________ sensitive.
4. A constant is generally written in __________ letters.
5. The input() function always returns data as __________.

DESCRIPTIVE QUESTIONS

1. Write a program that takes three numbers as input and prints the largest number among them.

2. Predict the output of the following code:

x = 10
y = x
x = x + 5
print(x, y)

3. Explain the difference between mutable and immutable data types in Python with examples.

4. Write a program that accepts two numbers and swaps their values without using a third variable.

5. Why does the following code throw an error? Rewrite it correctly.

1value = 100
print(1value)

a = int(input("Enter first number: "))
b = int(input("Enter second number: "))
c = int(input("Enter third number: "))

if a >= b and a >= c:
    print("Largest =", a)
elif b >= a and b >= c:
    print("Largest =", b)
else:
    print("Largest =", c)

x = 10
y = x
x = x + 5
print(x, y)

lst = [1,2,3]
lst.append(4)   # list changes

x = 5
x = x + 1   # creates new object, old one unchanged

a = int(input("Enter first number: "))
b = int(input("Enter second number: "))
a, b = b, a
print("After swapping: a =", a, "b =", b)

value1 = 100
print(value1)