Python Practice Questions & Solutions Day 4 of Learning Python for Data Science

by
Python Practice Questions & Solutions Day 4 of Learning Python for Data Science
Python Practice Questions & Solutions Day 4 of Learning Python for Data Science

Welcome back to Day 4 of Learning Python for Data Science! In the last article, we explored:

✅ Comparison Operators
✅ Logical Operators
✅ Loops in Python
✅ Loop Control Statements

Now, it’s time to solve the practice questions given in the previous article.
Each question is followed by a detailed explanation and output.

What will be the output of this code?

python
print(10 == 10)

Solution:
This checks if 10 is equal to 10, which is True.

Output:

True

Write a Python program that checks whether a number is positive, negative, or zero.

Solution:

num = int(input("Enter a number: "))

if num > 0:
    print("Positive Number")
elif num < 0:
    print("Negative Number")
else:
    print("Zero")

Example Input/Output:

Enter a number: 5
Positive Number

What will be the output?

print(5 > 3 and 10 > 5)

Solution:
Both conditions 5 > 3 and 10 > 5 are True, so the result is True.

Output:

True

Write a program to check if a number is divisible by both 2 and 5 using logical operators.

Solution:

num = int(input("Enter a number: "))

if num % 2 == 0 and num % 5 == 0:
    print("Divisible by both 2 and 5")
else:
    print("Not divisible by both")

Example Input/Output:

Enter a number: 10
Divisible by both 2 and 5

What will be the output of this while loop?

x = 1
while x < 5:
    print(x)
    x += 1

Solution:
The loop runs while x is less than 5, printing 1, 2, 3, 4.

Output:

1
2
3
4

Modify the code below to use a for loop instead of while:

Solution:

for x in range(1, 6):
    print(x)

Output:

1
2
3
4
5

What happens if the break statement is removed from the following loop?

for i in range(1, 6):
    if i == 4:
        break
    print(i)

Solution:
Without break, the loop prints all numbers from 1 to 5 instead of stopping at 4.

Output without break:

1
2
3
4
5

Write a program that prints all even numbers from 1 to 20 using a loop.

Solution:

for i in range(1, 21):
    if i % 2 == 0:
        print(i, end=" ")

Output:

2 4 6 8 10 12 14 16 18 20

What will be the output of the following?

for i in range(1, 6):
    if i == 3:
        continue
    print(i)

Solution:
The continue statement skips printing 3.

Output:

1
2
4
5

Write a Python program that skips all numbers divisible by 3 in a loop from 1 to 10 using continue.

Solution:

for i in range(1, 11):
    if i % 3 == 0:
        continue
    print(i, end=" ")

Output:

1 2 4 5 7 8 10

Write a for loop that prints numbers from 1 to 10 but stops when it reaches 7.

Solution:

for i in range(1, 11):
    if i == 7:
        break
    print(i)

Output:

1
2
3
4
5
6

What will be the output?

x = 5
y = 10
print(x > 2 and y < 15)

Solution:
Both conditions are True, so the result is True.

Output:

True

Write a program that calculates the sum of numbers from 1 to 100 using a for loop.

Solution:

total = 0
for i in range(1, 101):
    total += i
print("Sum:", total)

Output:

Sum: 5050

Modify the following loop to stop execution when x is greater than 50.

Solution:

x = 1
while x < 100:
    if x > 50:
        break
    print(x, end=" ")
    x += 5

Output:

1 6 11 16 21 26 31 36 41 46

Write a program that counts how many even numbers exist between 1 and 50.

Solution:

count = 0
for i in range(1, 51):
    if i % 2 == 0:
        count += 1
print("Total even numbers:", count)

Output:

Total even numbers: 25

Modify the following loop to use pass when x == 5.

Solution:

for x in range(10):
    if x == 5:
        pass  # Placeholder
    else:
        print(x)

Output:

0
1
2
3
4
6
7
8
9

Print even numbers from 1 to 20 using a for loop.

for i in range(1,21):
    if i % 2 == 0:
        print(i)
    else:
        continue

Output

2
4
6
8
10
12
14
16
18
20

Print the sum of numbers from 1 to 50 using a while loop.

num = 1
sum = 0
while num <=50:
    sum += num
    num += 1
print(sum)

Output

1275

Print the reverse of a given string using a loop.

name = 'Vishal'
rev = ''
for i in name:
    rev = i + rev
print(rev)

Output

lahsiV

Explanation In this code when loop is accesing the first charecter from name it gets 'V' and stores in rev. in the next iteration it get i and since condition to store is defined to prepend as i + rev it stores as 'iV' similarly in the next iteration it gets 's' and store as 'siV' and so on.

Use a loop to find the factorial of a number.

num = 5
fac = 1
for i in range(1,num+1):
    fac*=i
print(fac)

Output

120

Generate the Fibonacci series up to 10 terms using a while loop

# Initialize first two terms
a, b = 0, 1

# Number of terms to generate
count = 0
n = 10  # Total terms

while count <= n:
    print(a, end=", ")  # Print the current term
    a, b = b, a + b  # Update values for the next iteration
    count += 1

Output

0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55,

Use a for loop to check if a number is prime.

num = int(input('Enter a number: '))

if num <= 1:
    print(f'{num} is not prime.')
else: 
    for i in range(2,num):
        if num % i == 0:
            print(f'{num} is not prime.')
            break
    else:
        print(f'{num} is prime.')

We hope this article was helpful for you and you learned a lot about data analyst interview from it. If you have friends or family members who would find it helpful, please share it to them or on social media.

Join our social media for more.

Join us on Telegram
Follow our WhatsApp Channel

Python for Data Science Python for Data Science Python for Data Science Python for Data Science Python for Data Science Python for Data Science Python for Data Science Python for Data Science

Also Read:

Spread the love