PCEP Data Structures 5

Question 1

What is the output of `a = [1, 2]; b = a; b.append(3); print(a)`?

Accepted Answer

[1, 2, 3]

Answer

[1, 2]

Answer

[3]

Answer

Error

Question 2

What is the correct way to delete a key from a dictionary?

Accepted Answer

del dict['key']

Answer

dict.remove('key')

Answer

dict.pop_key('key')

Answer

dict.delete('key')

Question 3

What is the output of `print((1, 2) * 2)`?

Accepted Answer

(1, 2, 1, 2)

Answer

(2, 4)

Answer

((1, 2), (1, 2))

Answer

Error

Question 4

Which method returns and removes an arbitrary element from a set?

Accepted Answer

pop()

Answer

remove()

Answer

discard()

Answer

delete()

Question 5

What is the result of `list({'a': 1, 'b': 2})`?

Accepted Answer

['a', 'b']

Answer

[1, 2]

Answer

[('a', 1), ('b', 2)]

Answer

['a', 1, 'b', 2]

Question 6

What is the output of `nested = [[1,2],[3,4]]; print(nested[1][0])`?

Accepted Answer

3

Answer

1

Answer

2

Answer

4

Question 7

What does `{1, 2, 3} | {3, 4, 5}` evaluate to?

Accepted Answer

{1, 2, 3, 4, 5}

Answer

{3}

Answer

{1, 2, 4, 5}

Answer

Error