Python Revision Quiz

Dictionaries in Python are mutable but Strings are immutable.

• True

• False

Answer explanation

Dictionaries in Python can be changed after creation (mutable), while strings cannot be altered once created (immutable). Therefore, the statement is true.

str="R and Data Science"

z=str.split()

newstr="=".join([z[2].upper(),z[3],z[2]+z[3],z[1].capitalize()])

newstr is equal to

• 'DATA=Science=DataScience=And'

• 'DATA=DataScience=And'

• 'DATA=Science=And'

• 'DATA=Science==DataScience=And'

Answer explanation

The string is split into words: ['R', 'and', 'Data', 'Science']. The new string is formed by joining the uppercase of 'Data', 'Science', the concatenation of 'Data' and 'Science', and the capitalized 'and', resulting in 'DATA=Science=DataScience=And'.

Consider the given expression:

True and not AAA and not True or True

Which of the following will be correct output if the given expression is evaluated

with AAA as False?

• True

• False

• NONE

• NULL

Answer explanation

Evaluating the expression with AAA as False: True and not False and not True or True simplifies to True and True and False or True, which further simplifies to True or True, resulting in True.

What shall be the output of the following statement?

“TEST”.split(‘T’,1)

• [ ‘ ‘, ’ ES ’ ,’ ‘ ]

• [ ‘T’, ’ ES ’ ,’T’]

• [ ‘ ‘, ‘ EST ’]

• Error

Answer explanation

The statement 'TEST'.split('T', 1) splits the string at the first occurrence of 'T'. It results in [' ', 'EST'], where the first part is before 'T' and the second part is after. Thus, the correct output is [' ', 'EST'].

What shall be the output for the execution of the following statement? “ANTARTICA”.strip(‘A’)

• NTRCTIC

• [‘ ‘, ‘NT’, ‘RCTIC’, ‘ ‘]

• 'NTARTIC'

• Error

Answer explanation

The method strip('A') removes 'A' characters from both ends of the string 'ANTARTICA'. The result is 'NTARTIC', as the leading and trailing 'A's are stripped, making 'NTARTIC' the correct output.

Consider The following: t=(12,13,14,16,[2,3])

What changes will be made in t after the execution of the following statement?

t.append(4)

• t=(12,13,14,16,[2,3],4)

• t= (12,13,14,16,[2,3,4])

• t=(4,12,13,14,16,12,3)

• It will give an error

Answer explanation

The tuple 't' is immutable in Python, meaning you cannot change it after creation. Attempting to use 't.append(4)' will result in an AttributeError, as tuples do not have an 'append' method. Thus, it will give an error.

• 0

• 1

• 2

• Error

Predict the output of following code snippet:

Lst = [10,20,30,40,50,60,70,80,90]

print(Lst[::3])

• [10,40]

• [10, 40, 70]

• [10,40,90]

• [10,30,50]

• Option a

• Option b

• Option b & Option d

• Option c & Option d

• 15\n7\n9\n

• 15@\n7@\n9@\n

• 15@7@9@

• 15@

  7@

  9@