Deck 8: More About Strings

Question 1

You cannot use a for loop to iterate over the characters in a string.

Answer 1

False

Question 2

The strip()method returns a copy of the string with all the leading whitespace characters removed but does not remove trailing whitespace characters.

Answer 2

False

Question 3

What is the first negative index in a string?

A) 0
B) -1
C) -0
D) the size of the string minus one

Answer 3

B

Question 4

What are the valid indexes for the string 'New York'?

A) 0 through 7
B) 0 through 8
C) -1 through -8
D) -1 through 6

Question 5

The index -1 identifies the last character of a string.

Question 6

What will be assigned to the variable s_string after the following code executes?
Special = '1357 Country Ln.'
S_string = special[ :4]

A) '7'
B) '1357'
C) 5
D) '7 Country Ln.'

Question 7

If the start index is __________ the end index,the slicing expression will return an empty string.

A) equal to
B) less than
C) greater than
D) less than or equal to

Question 8

Indexing works with both strings and lists.

Question 9

What will be assigned to the variable some_nums after the following code executes?
Special = '0123456789'
Some_nums = special[0:10:2]

A) '0123456789'
B) '24682468'
C) '02468'
D) '02020202020202020202'

Question 10

When accessing each character in a string,such as for copying purposes,you would typically use a while loop.

Question 11

If a whole paragraph is included in a single string,the split()method can be used to obtain a list of the sentences in the paragraph.

Question 12

What will be displayed after the following code executes?
Mystr = 'yes'
Yourstr = 'no'
Mystr += yourstr * 2
Print(mystr)

A) yes + no * 2
B) yes + no yes + no
C) yesnono
D) yesnoyesno

Question 13

In slicing,if the end index specifies a position beyond the end of the string,Python will use the length of the string instead.

Question 14

The following expression is valid:
string[i] = 'i'

Question 15

What will be assigned to the variable s_string after the following code executes?
Special = '1357 Country Ln.'
S_string = special[4:]

A) ' Country Ln.'
B) '1357'
C) 'Coun'
D) '57 C'

Question 16

What is the return value of the string method lstrip()?

A) the string with all whitespaces removed
B) the string with all leading whitespaces removed
C) the string with all leading tabs removed
D) the string with all leading spaces removed

Question 17

If the + operator is used on strings,it produces a string that is a combination of the two strings used as its operands.

Question 18

Indexing of a string starts at 1 so the index of the first character is 1,the index of the second character is 2,and so forth.

Question 19

What will be assigned to the variable s_string after the following code executes?
Special = '1357 Country Ln.'
S_string = special[-3:]

A) '135'
B) '753'
C) 'Ln.'
D) 'y Ln'

Question 20

The following code will display 'yes + no':
mystr = 'yes'
yourstr = 'no'
mystr += yourstr
print(mystr)

Question 21

Which method would you use to determine whether a certain substring is present in a string?

A) endswith(substring)
B) find(substring)
C) replace(string, substring)
D) startswith(substring)

Question 22

The __________ operator can be used to determine whether one string is contained in another string.

Question 23

Which method would you use to determine whether a certain substring is the suffix of a string?

A) endswith(substring)
B) find(substring)
C) replace(string, substring)
D) startswith(substring)

Question 24

When the operand on the left side of the * symbol is a string and the operand on the right side is an integer,the * becomes the ___________ operator.

Question 25

What will be the value of the variable string after the following code executes?
String = 'abcd'
String.upper()

A) 'abcd'
B) 'ABCD'
C) 'Abcd'
D) Nothing; this code is invalid

Question 26

Each character in a string has a(n)__________ which specifies its position in the string.

Question 27

What list will be referenced by the variable list_strip after the following code executes?
My_string = '03/07/2018'
List_strip = my_string.split('/')

A) ['3', '7', '2018']
B) ['03', '07', '2018']
C) ['3', '/', '7', '/', '2018']
D) ['03', '/', '07', '/', '2018']

Question 28

What will be the value of the variable string after the following code executes?
String = 'Hello'
String += ' world!'

A) 'Hello'
B) ' world!'
C) 'Hello world!'
D) Nothing; this code is invalid

Question 29

The third number in string slicing brackets represents the ___________ value.

Question 30

The __________ method returns True if the string contains only numeric digits.

Question 31

A(n)__________ is a span of characters that are taken from within a string.

Question 32

The __________ method returns the list of the words in a string.

Question 33

What will be assigned to the string variable pattern after the following code executes?
I = 3
Pattern = 'z' * (5 * i)

A) 'zzzzzzzzzzzzzzz'
B) 'zzzzz'
C) 'z * 15'
D) Nothing; this code is invalid

Question 34

What will display after the following code executes?
Password = 'ILOVEPYTHON'
If password.isalpha():
Print('Invalid,must contain one number.')
Elif password.isdigit():
Print('Invalid,must have one non-numeric character.')
Elif password.isupper():
Print('Invalid,cannot be all uppercase characters.')
Else:
Print('Your password is secure!')

A) Invalid, must contain one number.
B) Invalid, must have one non-numeric character.
C) Invalid, must contain one number.
Invalid, cannot be all uppercase characters.
D) Your password is secure!

Question 35

A(n)__________ exception will occur if you try to use an index that is out of range for a particular string.

Question 36

The isalpha()method returns __________ if the string contains only alphabetic characters and is at least one character in length.

Question 37

The __________ method returns a copy of the string with all the alphabetic letters converted to lower case.