String

Question 1

What is the use of ascii_only method?

Answer 1

Returns true for a string which has only ASCII characters.

Question 2

Is there any method called “b” in string?

Answer 2

yes.Returns a copied string whose encoding is ASCII-8BIT.

Question 3

Which methods returns an array of the Integer ordinals of the characters in string?

Answer 3

codepoints

Question 4

Where we can use “ord” method

Answer 4

to print integer ordinals of the string

Question 5

differentiate - “hex’ and “oct” methods

Answer 5

hex - Treats leading characters from str as a string of hexadecimal digits

oct-Treats leading characters of str as a string of octal digits

Question 6

Which method searches pattern (regexp) in the string and returns the part before it, the match, and the part after it.?

Answer 6

Partition method

Question 7

How to remove invalid byte sequence in a string?

Answer 7

scrub method

“abc\u3042\x81”.scrub(“”) #=> “abc\u3042”

Question 8

a = “ 3”
How you will get this string?(no concatenation)

“Ruby 3”

Answer 8

a.prepend(“Ruby”)

Question 9

Which methods returns a new string where runs of the same character that occur in this set are replaced by a single character?

Answer 9

squeeze

Question 10

What is the use of “to_c” method in String?

Answer 10

Returns a complex which denotes the string form.