Python Interview Programs

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Allthe programs below are center indented. Please type it while implementing in py.

1.       Write a program to print a string in Python ?

Ans –  Strings can be printed using double quotes or single quote. Please refer the below example for trying dfferent variables.

a = "Hello World"

print a

Output : python main.py

Hello World

The choice between single and double quotes often comes down to convenience, especially when your string contains quotes. For example:

• If your string contains a single quote, you might use double quotes to avoid escaping:

  print("It's a beautiful day!")
  

• Conversely, if your string contains double quotes, you might use single quotes:

  print('He said, "Hello!"')

2.      Write a program to accept two numbers from user and print their sum?

Ans –

a=int(input("Enter a number\n"))

print(a)

b=int(input("Enter a number\n"))

print(b)

sum=a+b

print("Sum of both the numbers is ",+sum)

Output : python main.py

Enter a number

345

Enter another number

100

Sum of both the numbers is 445

3.       Write a program to accept two strings from user and print their difference?

Ans -

a= int(input('Enter a number\n'))

print(a)

b= int(input("Enter another number\n"))

print(b)

diff=a-b

print("Difference between above numbers is : ",diff)

Output : python main.py

Enter a number

89

Enter another number

90

Difference between both the numbers is -1

4.      Write a program to accept two strings from user and print their product(multiply) and quotient(divide)?

Ans –

a= int(input('Enter a number\n'))

print(a)

b= int(input("Enter another number\n"))

print(b)

product=a*b

quotient=a/b

print("Product of both the numbers is ")

print(product)

print("Quotient of both the numbers is ")

print(quotient)

Output : python main.py

Enter a number

10

Enter another number

10

Product of both the numbers is

100

Quotient of both the numbers is

1

5.     Write a program to print(area of a circle. A(circle)= 3.14 * R * R ?

          Ans –

radius= int(input('Enter radius\n'))

area=3.14*radius*radius

print("Area of the given circle is ")

print(area)

Output : python main.py

Enter radius

2

Area of the given circle is

12.56

6.      Write a program to print(area of a triangle A(Triangle)= 0.5 * B * H

Ans -

B= int(input('Enter Base\n'))

H=int(input("Enter Height\n"))

area=0.5*B*H

print("Area of the given traingle is ")

print(area)

Output : python main.py

Enter Base

2

Enter Height

2

Area of the given triangle is

2.0

7.      Write a program to print(simple interest SI = (PNR)/100

       Ans –

P= int(input('Enter Principal\n'))

R=int(input("Enter Rate\n"))

N=int(input("Enter Time in Months\n"))

SI=(P*N*R)/100

print("Simple Interest is ")

print(SI)

Output : python main.py

Enter Principal

100

Enter Rate

100

Enter Time in months

3

Simple Interest is

300

8.      Write a program to accept two values AND swap them using 3rd variable

     Ans –

a=int(input ("Enter 1st number\n"))

b=int(input("Enter 2nd number\n"))

print("Before swapping value of a and b are", a,"and",b, "respectively")

temp =a

a=b

b=temp

print("After swapping value of a and b are", a,"and",b, "respectively")

Output : python main.py

Enter 1st number

1290

Enter 2nd number

9090

Before swapping value of a and b are 1290 and 9090 respectively

After swapping value of a and b are 9090 and 1290 respectively

Note: Same program using function :

def swap(a,b) :

    var=a

    a=b

    b=var

    print(a,b)

swap(1000,19999)

Output : 19999,1000

9.      Write a program to accept roll and marks of 3 subjects of a student. Calculate total of 3 subjects and average.

Ans –

#Calculate marks of a student

roll=int(input("Enter roll\n"))

mark1=int(input("Enter mark1\n"))

mark2=int(input("Enter mark2\n"))

mark3=int(input("Enter mark3\n"))

total=mark1+mark2+mark3

average=total/3

print("Student Roll Number :",roll)

print("Phy marks = ",mark1,"Math Marks = ",mark2,"Chem Marks = ",mark3)

print("Total Marks In All Subjects = ",total)

print("Average Marks =",average)

Output: python main.py

Enter roll number

122

Enter marks 1

90

Enter marks 2

90

Enter marks 3

90

Student Roll Number : 122

Phy Marks = 90, Math Marks = 90, Chem Marks = 90

Total Marks in all Subjects = 270

Average Marks = 90 

10.  print(following outputs : http://www.google.com using Python)

Ans –

print(“http://www.google.com”)

#Still puzzled ? Please try this again to find the difference

11.  print(largest of 2 numbers)

Ans –

print("largest of two numbers")

a=int(input("Enter 1st number\n"))

b=int(input("Enter 2nd number\n"))

print("Numbers Entered are ",a,b)

if a>b :

    print("Largest number is ",a)

else :

    print("Largest number is ",b)

Output: python main.py

Enter 1st number

8989

Enter 2nd number

9

Numbers Entered are 8989 and 9

Largest number is 8989 

12.  Write a program to find if positive or negative.

Ans –

#Entered positive or negative number?

a=int(input("Enter a number\n"))

print("Numbers Entered is ",a)

if a>0 :

print(a,"is positive")

else :

 print(a,"is negative")

Output: python main.py

Enter a number

90

Number Entered is 90

90 is positive

or

try:
    def pn():
        i=0
        N=int(input("Enter how many numbers you want to check"))
        while i<N-1:
            n=int(input("Enter a number to chk: "))
            if n>0:
                print(n," is a positive number")
            elif n<0:
                print(n," is a negative number")
            else:
                print(n," is a whole number")
    pn()
except Exception as error:

        print("Please enter a valid number ",error)

13.  Write a program to check if it is >10, <10 or equals 10.

Ans –

#Entered number is greater than 10?

a=int(input("Enter a number\n"))

print("Numbers Entered is ",a

if a>10 :

    print(a,"is greater than 10")

elif a<10 :

    print(a,"is less than 10")

else :

    print(a,"is equal to 10")

Output: python main.py

Enter a number

90

Number Entered is 90

90 is greater than 10

14.  Write a program to find if a number is even or odd.

Ans –

#Entered number is even or odd?

a=int(input("Enter a number\n"))

print("Numbers Entered is ",a)

if a%2==0 :

    print(a,"is even")

else :

    print(a,"is Odd")

Output : Enter a number

9

Number Entered is 9

Number is Odd

15.  Write a program to find numbers divisible by 5

Ans –

#Divisible by 5?

a=int(input("Enter a number\n"))

print("Numbers Entered is ",a)

if a%5==0 :

    print(a,"is divisible by 5")

else :

    print(a,"is not divisible by 5")

Output :

Enter a number

90

Number Entered is 90

Number is divisible by 5

within a range of 100 if you are trying to print which ones are divisible by 5 then use the following program.

i=1

while i<=100:

    if i%5==0:

        print(f"{i} is divisible by 5")

    i=i+1

16.  Write a program to accept 2 numbers from user and compare them.

Ans –

#Compare two numbers ?

a=int(input("Enter a number\n"))

b=int(input("Enter another number\n"))

print("Numbers Entered are ",a,b)

if a>b :

    print(a,"is greater than",b)

elif b>a :

    print(b,"is greater than ",a)

else :

    print(a,"and ",b,"are equal")

Output : python main.py

Enter a number

89

Enter another number 9

Numbers Entered are 89 and 9

a is greater than b 

17.  Write a program to accept 3 numbers and print(in ascending Order).

Ans –

#Sort in ascending Order

try:

    a=int(input("Enter a number: "))

    b=int(input("Enter another number: "))

    c=int(input("Enter third number: "))

    listme=[]

    listme.append(a)

    listme.append(b)

    listme.append(c)

    listme.sort()

    print(listme)

except Exception as error: 

    print(error)

Output : python main.py

Enter a number

5

Enter another number

4

Enter third number

3

Ascending Order is:  3 4 5

Accept 100 numbers and print in asc order.

# Initialize an empty list to store the numbers numbers = [] # Loop to accept 100 numbers from the user for _ in range(100): num = int(input("Enter a number: ")) numbers.append(num) # Sort the list in ascending order numbers.sort() # Print the sorted list print("Numbers in ascending order:") for num in numbers: print(num)

18.  Write a Program to accept a number and print(its reverse using while loop)

Ans –

try:

    n=int(input("Enter a number"))

    while n>0:

        rem=int(n%10)

        print(int(rem),end='')

        n=int(n/10)

except Exception as error:

   print(error)

Output: python main.py

Enter a number890

098

Note: Above program using function:

def reverse(num) :

    while num>0 :

        rem=num%10

        print(rem)

        num=num/10

num=int(input("enter a number"))

reverse(num)

19.  Write a Program to accept a number and print(sum of its digits)

Ans –

try:

    n=int(input("Enter a number "))

    sum=0

    while n>0:

        rem=int(n%10)

        sum=int(sum+rem)

        n=int(n/10)

    print("sum of the numbers is: ",sum)

except Exception as error:

    print(error)

Output : python main.py

Enter a number 921224

sum of the numbers is:  20

   

20.  Write a program to check if it is Armstrong number – 153=1^3 + 5^3 + 3^3

Ans -

n=int(input("Enter a number\n"))

sum=0

i=2

temp=n

while n>0 :

    rem=n%10

    sum=sum+(rem*rem*rem)

    n=n/10

if temp==sum :

    print("It is an Armstrong Number")

else :

    print("It is not an Armstrong Number")

Output : python main.py

Enter a number

153

It is an Armstrong Number

21.   Write a program to check if its vowel.

Ans –

a = input("Enter any alphabet\n")

alphabet=['a','e','i','o','u',"A","E","I","O","U"]

if a in alphabet :

    print(a,": is vowel")

else :

    print(a,": is Consonant, not vowel")

Output :

Enter any alphabet

“a”

a: is vowel

#or use below func

import re 

def is_vowel(char): 

    if re.match(r'[aeiouAEIOU]', char): 

        return True

    return False

  

print(is_vowel('a'))  # Output: True  

print(is_vowel('b'))  # Output: False 

22.  Check if a year is leap year or not

Ans –

#Leap Year

year=int(input("Enter a year\n"))

excep=[1800,1900,2100,2200,2300]

if year%4==0 and year not in excep :

    print(year," is leap year")

else :

    print(year," is not leap year")

Output :

Enter a year

1800

1800 is not a leap year

23.  Find out the factorial of a number.

Ans –

#Factorial

num=int(input("Enter a number\n"))

fact=1

for i in range (1,num+1) :

    fact=fact*i

print(fact)

Output :

Enter a number

5

120

24.  Find HCF of a number

Highest number divisible by both the given numbers if HCF or Highest Common Factor or GCD or Greatest Common Divisor

Ans –

#HCF

num1=int(input("Enter a number\n"))

num2=int(input("Enter another number\n"))

for i in range (1,num1+1) :

    for i in range (1,num2+1) :

        if num1%i==0 and num2%i==0 :

            hcf=i

print(hcf)

Output :

Enter a number

100

Enter another number

500

100

Note : Another approach of same program using built-in function

#HCF

from itertools import chain ; #built-in

num1=int(input("Enter a number\n"))

num2=int(input("Enter another number\n"))

for i in chain (range(1,num1+1),range(1,num2+1)) :

    if num1%i==0 and num2%i==0 :

        hcf=i

print(hcf)

Output :

Same as above

25.   Find out the LCM of a number.

Ans –

#Multiple of both given numbers by HCF gives us LCM of the number.

from itertools import chain ; #built-in

num1=int(input("Enter a number\n"))

num2=int(input("Enter another number\n"))

for i in chain (range(1,num1+1),range(1,num2+1)) :

    if num1%i==0 and num2%i==0 :

        hcf=i

lcm=(num1*num2)/hcf

print(“LCM is ”,lcm)

Output :

Enter a number

100

Enter another number

500

LCM is 500

26.  Decimal to Binary, Octal, Hexadecimal, Decimal conversions

Ans –

a=int(input("Enter a number\n"))

print("Binary form of above number is ",bin(a))

print("Hexa-Decimal form of above number is ",hex(a))

print("Octal form of above number is ",oct(a))

print("Decimal form of above number is ",int(bin(a),2))

Output :

Enter a number                                                                                                                                                                  

25                                                                                                                                                                             

Binary form of above number is  0b11001                                                                                                                                         

Hexa-Decimal form of above number is  0x19                                                                                                                                      

Octal form of above number is  031                                                                                                                                             

Decimal form of above number is  25

27.  Check if a number is Palindrome

Ans –

#Palindrome

def Palindrome_Number():

    n = int(input('Enter Number to check for palindrome'))

    m=n

    a = 0

    while(m!=0):

        a = m % 10 + a * 10

        m = m / 10

    if( n == a):

        print('%d is a palindrome number' %n)

    else:

        print('%d is not a palindrome number' %n)

Palindrome_Number()

Output :

Enter Number to check for palindrome213                                                                                                                                        

213 is not a palindrome number

28. Convert a word to UpperCase if it is in LowerCase and ViceVersa.

print('Case changer(Capital to small and vice versa)')

line1 = input('Enter here: ')

g = ""

for ch in line1 :

    if ord(ch) >=ord('A') and ord(ch) <=ord('Z') :

        low=ord(ch)+32

        print(chr(low),end=""),

    else:

        print(ch,end="")

print("\n")

line2=input("Enter another word : ")

for ch in line2 :

    if ord(ch) >=ord('a') and ord(ch) <=ord('z') :

        high=ord(ch)-32

        print(chr(high),end=""),

    else:

        print(ch,end="")

Output :

Case changer(Capital to small and vice versa)

Enter here: SuCHi

suchi

Enter another word : KauR

KAUR

Process finished with exit code 0

29. Write a program to accept two values AND swap them without using 3rd variable

try:

    a=int(input("Enter a number"))

    b=int(input("Enter another number"))

    print("Value of a and b is",a,b)

    b=a+b

    a=b-a

    b=b-a

    print("Swapped Value of a and b is",a,b)

except Exception as error:

    print("Enter a valid number",error)

Same program using function :

try:

    a=int(input("Enter a no."))

    b=int(input("Enter another number"))

    print("Value of a and b is ",a,b)

    def swap(a,b):

            a=a+b

            b=a-b

            a=a-b

            print("Swapped Value of a and b is",a,b)

    swap(a,b)

except Exception as error:

    print("Please enter a valid number : ",error)

30. Write a program to accept n values AND find largest

largest of n numbers

n_max=""

def largenum(n_max):

    i=0

    N=int(input("Enter how many numbers you want to check?"))

    n_max=int(input("Enter first number :"))

    while i<N-1:

        n=int(input("Enter another number: "))

        if n>n_max:

            n_max=n

        i+=1

    print("max value is",n_max)

    return n_max

largenum(n_max)

31. Smallest of n numbers

n_min=""

def smallest(n_min):

    i=0

    N=int(input("Enter how many numbers you want?"))

    n_min=int(input("Enter first number: "))

    while i<N-1:

        n=int(input("Enter another number: "))

        if n<n_min:

            n_min=n

        i+=1

    print("The smallest number is ",n_min)

    return n_min

smallest(n_min)

#or use this function in case of list

num=[1,2,90,80,800]

print(max(num))

print(min(num))

32. Write a program to print fibonacci series upto n terms in python

num = 10

n1, n2 = 0, 1

print("Fibonacci Series:", n1, n2, end=" ")

for i in range(2, num):

    n3 = n1 + n2

    n1 = n2

    n2 = n3

    print(n3, end=" ")

print()

Output :

Fibonacci Series: 0 1 1 2 3 5 8 13 21 34 

33. print 12345 in pattern

n=5 #no. of rows

for i in range(0,n+1):

    for j in range(i):

        print(i,end="")

    print()

""" Output is

1

22

333

4444

55555

"""

34. Palindrome

num=int(input("Enter a number to check palindrome: "))

temp=num

rem=0

while num>0:

    n=int(num%10)

    #print(n)

    rem=int(n+(rem*10))

    print(rem)

    num=int(num/10)

    #print(num)

if temp==rem:

    print("palindrome")

Enter a number to check palindrome: 123

3

32

321 

35. IPaddress

import ipaddress

def validate(ip_string):

    ip_object=ipaddress.ip_address(ip_string)

    print("IP Address",ip_string," is valid")

    

validate("2001:db8:3333:4444:5555:6666:7777:8888")

validate("192.168.10.1")

Output - 

IP Address 2001:db8:3333:4444:5555:6666:7777:8888  is valid

IP Address 192.168.10.1  is valid

36. List slicing

a=[1,2,3,4]

print(a[-1])

Output :

4

37. create,read,write,append file

#create new file if doesnt exist

#f = open("myfile.txt", "x")

f = open("demofile2.txt", "a")

f.write("Now the file has more content!")

f.close()

#open and read the file after the appending:

f = open("demofile2.txt", "r")

print(f.read())

import os

os.remove("demofile2.txt")

Output:

Now the file has more content!