Python Quiz

251. What is the output of:

print(bool('False'))

False

True

None

Error

252. Which of these data structures is best for fast membership testing?

List

Tuple

Set

Dictionary

253. What will be the output of:

x = [1, 2, 3]
y = x[:]
x.append(4)
print(y)

[1, 2, 3]

[1, 2, 3, 4]

[4]

Error

254. What is the output of:

print('2' + '3' * 2)

'232'

'233'

'26'

'2' + 6

255. Which of these methods modifies the original list?

sorted()

reversed()

sort()

all()

256. Which of the following exceptions is raised when a variable is not defined?

KeyError

TypeError

NameError

ValueError

257. Which operator is used to unpack function arguments from a list or tuple?

**

&

*

//

258. What is the output of:

print(list(map(lambda x: x*2, [1, 2, 3])))

[2, 4, 6]

[1, 2, 3]

[1, 4, 9]

[2, 3, 4]

259. Which file mode is used to create a new file or overwrite if it exists?

'a'

'x'

'w'

'r+'

260. What will be the output of:

print({1, 2, 3} - {2})

{1, 3}

[1, 3]

(1, 3)

{2, 3}