Python subjective question for competitive exam (27)

Q1.Program to compute polynomial equation.

import math
print("enter the cofficient of the form ax^3+bx^2+cx+d")
l=[]
for i in range(0,4):
    a=int(input("enter cofficient"))
    l.append(a)
x=int(input("enter value of x"))
sum=0
j=3
for i in range(0,3):
    while(j>0):
        sum=sum+(l[i]*math.pow(x,j))
        break
    j=j-1
sum=sum+l[3]
print("the value of polynomial is",sum)

Output
>>> 
=== RESTART: C:/Users/Dell/AppData/Local/Programs/Python/Python37-32/ss.py ===
enter the cofficient of the form ax^3+bx^2+cx+d
enter cofficient1
enter cofficient1
enter cofficient1
enter cofficient1
enter value of x2
the value of polynomial is 15.0

Q2.Program to print identity matrix.

n=int(input("enter size"))
for i in range(0,n):
    for j in range(0,n):
        if(i==j):
            print("1",sep=" ",end=" ")
        else:
            print("0",sep=" ",end=" ")
    print()

  
Output
>>> 
=== RESTART: C:/Users/Dell/AppData/Local/Programs/Python/Python37-32/ss.py ===
enter size4
1 0 0 0 
0 1 0 0 
0 0 1 0 
0 0 0 1                 

Q3.Program to find entered number is perfect or not.

n=int(input("enter number"))
sum=0
for i in range(1,n):
    if(n%i==0):
        sum=sum+i
if(sum==n):
    print("number is perfect number")
else:
    print("the number is not perfect number")
    

=== RESTART: C:/Users/Dell/AppData/Local/Programs/Python/Python37-32/ss.py ===
enter number6
number is perfect number
=== RESTART: C:/Users/Dell/AppData/Local/Programs/Python/Python37-32/ss.py ===
enter number10
the number is not perfect number

Q4.Program to check key present in dictionary or not.

d={1:"ram",2:"sham",3:"ravi"}
key=int(input("enter the key want to search in dictionary"))
if key in d.keys():
    print("key is present")
    print(d[key])
else:
    print("key is not present in dictionary")

Output
>>> 
=== RESTART: C:/Users/Dell/AppData/Local/Programs/Python/Python37-32/ss.py ===
enter the key want to search in dictionary2
key is present
sham
>>> 
=== RESTART: C:/Users/Dell/AppData/Local/Programs/Python/Python37-32/ss.py ===
enter the key want to search in dictionary4
key is not present in dictionary

Q5.Program of transpose a matrix.

a=[[1,2],[3,4]]
for i in range(len(a)):
    for j in range(len(a[0])):
        print(a[i][j],sep=" ",end=" ")
    print()
print("matrix after transpose")
for i in range(len(a)):
    for j in range(len(a[0])):
        print(a[j][i],sep=" ",end=" ")
    print()

Output
>>> 
==================== RESTART: C:/Users/Dell/Desktop/ss.py ====================
1 2 
3 4 
matrix after transpose
1 3 
2 4