Python Sets Quiz

Question 1

Question 1: What is the output of the following program?

sets = {1, 2, 3, 4, 4} 
print(sets) 

• A. {1, 2, 3}
• B. {1, 2, 3, 4}
• C. {1, 2, 3, 4, 4}
• D. Error

Answer: (B)

Duplicate values are not allowed in sets. Hence, the output of the code shown above will be a set containing the duplicate value only once. Hence output will be {1, 2, 3, 4}.

Question 2

Question 2: What is the output of the following program?

sets = {3, 4, 5} 
sets.update([1, 2, 3]) 
print(sets) 

• A. {1, 2, 3, 4, 5}
• B. {3, 4, 5, 1, 2, 3}
• C. {1, 2, 3, 3, 4, 5}
• D. Error

Answer: (A)

The method update adds elements to a set.

Question 3

Question 3: What is the output of the following program?

set1 = {1, 2, 3} 
set2 = set1.copy() 
set2.add(4) 
print(set1) 

• A. {1, 2, 3, 4}
• B. {1, 2, 3}
• C. Invalid Syntax
• D. Error

Answer: (B)

In the above piece of code, set2 is barely a copy and not an alias of set1. Hence any change made in set2 isn’t reflected in set1.

Question 4

Question 4: What is the output of the following program?

set1 = {1, 2, 3} 
set2 = set1.add(4) 
print(set2) 

• A. {1, 2, 3, 4}
• B. {1, 2, 3}
• C. Invalid Syntax
• D. None

Answer: (D)

The add method doesn’t return anything. Hence there will be no output.

Question 5

Question 5: What is the output of the following program?

set1 = {1, 2, 3} 
set2 = {4, 5, 6} 
print(len(set1 + set2)) 

• A. 3
• B. 6
• C. Unexpected
• D. Error

Answer: (D)

The unsupported operand type(s) for +: ‘set’ and ‘set’.

Question 6

Question 6: What is the output of the following program?

A = {0, 2, 4, 6, 8}; 
B = {1, 2, 3, 4, 5}; 

print(A | B) 

• A. {0, 1, 2, 3, 4, 5}
• B. {0, 1, 2, 3, 4, 5, 6, 8}
• C. { 6, 8}
• D. None

Answer: (B)

The \"|\" operator is used for union.

Question 7

Question 7: What is the output of the following program?

A = {0, 2, 4, 6, 8}; 
B = {1, 2, 3, 4, 5}; 


print(A & B) 

• A. {0, 1, 2, 3, 4, 5, 6, 8}
• B. {0, 1, 3, 5, 6, 8}
• C. {2, 4}
• D. {0, 8, 6}

Answer: (C)

The \"&\" operator is used for intersection.

Question 8

Question 8: What is the output of the following program?

A = {0, 2, 4, 6, 8}; 
B = {1, 2, 3, 4, 5}; 

print( A - B)

• A. {0, 1, 2, 3, 4, 5, 6, 8}
• B. {0, 8, 6}
• C. {2, 4}
• D. {0, 1, 3, 5, 6, 8}

Answer: (B)

The \"-\" operator is used to get the difference between two iterable.

Question 9

Question 9: What is the output of the following program?

A = {0, 2, 4, 6, 8}; 
B = {1, 2, 3, 4, 5}; 

print( A ^ B) 

• A. {0, 1, 2, 3, 4, 5, 6, 8}
• B. {2, 4}
• C. {0, 8, 6}
• D. {0, 1, 3, 5, 6, 8}

Answer: (D)

The \"^\" operator is used to get the Symmetric difference.

Question 10

Question 10: What is the output of the following program?

set1 = set([1, 2, 4, 4, 3, 3, 3, 6, 5]) 

print(set1) 

• A. {1, 2, 4, 4, 3, 3, 3, 6, 5}
• B. {1, 2, 3, 4, 5, 6}
• C. [1, 2, 3, 4, 5, 6]
• D. [1, 2, 4, 4, 3, 3, 3, 6, 5]

Answer: (B)

All the elements in sets must be unique.