Page 190 - Computer Science V2.0 Class 11

9. What is the difference between a list and a tuple
Ans. (i) A list is enclosed in [] while a tuple is enclosed in ()
(ii) A list is mutable while a tuple is immutable
10. What is the difference between unary and binary operators?
Ans. A unary operator takes one operand while a binary operator takes two operands.
11. What will be the output when the following expressions are evaluated?
(i) 33 * 5/6 + 1
(ii) 2 * (22//7) * 5
(iii) 10 ** 2 - 45 / 6
(iv) "SUN" + "MOON"
(v) 45 % 3 > 8 and 23 // 6
(vi) (90 - 3 // 5) > 5 or 2 ** 3 > 5
(vii) not True or False and True
(viii) "TOWER" * 3
Ans. (i) 28.5
(ii) 30
(iii) 92.5

(iv) 'SUNMOON'
(v) False
(vi) True
(vii) False

(viii) 'TOWERTOWERTOWER'
12. Identify the errors in the given code:
radius = input("Enter a number")
area = 3.14*Radius**2
PRINT("The area is" + area)
Ans. radius = int(input("Enter a number") ) ………int() should be used
area = 3.14*radius**2 ………wrong variable name
print("The area is " , area) ………wrong function name and usage
13. Write a program that takes the temperature in Celsius and displays it in Fahrenheit.
Ans. #Objective: Given temperature in degree Celcius. Display in fahrenheit.
celcius = float(input("Enter temperature in degree Celcius : "))
F = celcius * 9 / 5 + 32
print("The temperature in degree Fahrenheit is : ", F)

Assertion and Reasoning Based Questions

The following questions are assertion(A) and reasoning(R) based. Mark the correct choice as
a. Both A and R are true and R is the correct explanation of A
b. Both A and R are true and R is not the correct explanation of A
c. A is true but R is false
d. A is false but R is true
1. Assertion(A): 0x876 is a hexadecimal number
Reasoning(R): The computer understands only hexadecimal number system.

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