NPTEL The Joy of Computing using Python Assignment Answers Week 4 2023

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NPTEL The Joy of Computing using Python Assignment Answers Week 4

Q1. Which of the following statements are true with regards to magic square?

Answer: a. The sum of each row should be m.
b. The sum of each column should be m.
c. The sum of each diagonal should be m.

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Q2. Which of the following statements hold true about N in the magic square? N denotes the number of rows and columns in the square.

Answer: b. N should be odd.

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Q3. Which of the following statements are true regarding the Magic Squares? (N = Number of rows or columns)

Answer: a. A Magic Square is always a square matrix.
d. The Sum of each row and each column is N(N2+1 )/2.

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Q4. What will be the output of the following code?

'''
This is a sentence
'''

Answer: c. No output

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Q5. Which of the following operator is used to raise the exponent to a number?

Answer: c. **

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Q6. Suppose there is a movie with 3 letters, how many combinations of names are possible?

Answer: c. 17576

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Q7. What should be the value of a, b, c, d respectively?

Answer: c. 1,7,3,9

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Q8. What will be the output of the following code?

L1 = ['harry potter', 'matrix', 'spiderman', 'avengers', 'john wick']
L2= ['drishyam', 'spiderman','bahubali', 'dhoom', 'race', 'matrix']
L = []
for i in range(len(L1)):
flag = 0
for j in range(len(L2)):
if(L1[i]== L2[j]):
flag = 1
	break
else:
	flag = 0
if(flag == 0):
	L.append(L1[i])
print(L)

Answer: a. Print unique movies of list L1

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Q9. What will be the output of the following code?

for i in range(5,20):
if(i%5 == 0):
print(i**2)

Answer: d. Print all perfect squares with square roots between 5-19 and divisible by 5.

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Q10. A perfect number is a positive integer that is equal to the sum of its positive divisors, excluding the number itself. For example, 6 is a perfect number as the sum of its divisors 1,2,3 is equal to 6.
Which function will return True if the number is a perfect number?

Answer: Option A

def perfect_number(num):
ans=0
for i in range(1, num):
if(num%i==0):
ans ans + i
if(ans==num):
return True
else:
return False

Joy of Computing using Python Programming Answers Week 4

Q1.

n=int(input())
ans=0
for i in range(1,n+1):
  ans+=i**2
print(ans,end="")

Q2.

n=int(input())
print(2**n,end="")

Q3.

n=int(input())
max_row=1
max_row1=1

for row in range(1,n+1):
    b=0
    for space in range(1,n-row+1):
        print(" ",end="")

    a=row
    Left=list()
    while(a!=max_row1):
        
        if a>9:
            Left.append(str(b))
            b=b+1
        else:    
            Left.append(str(a))
        a=a+1
    if row==n:    
      print(("".join(Left)+str(max_row)+"".join(Left[::-1])),end="") 
    else:
      print(("".join(Left)+str(max_row)+"".join(Left[::-1]))) 
    if (max_row+2>9):
        max_row=-1
    max_row+=2
    max_row1+=2    

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