Python strings an ordered collection of characters used to store and represent information based on text and bytes. In this article, I’ll introduce you to some important Python interview questions on strings.
What are Strings? Why are they used?
Functionally, strings can be used to represent just about anything that can be encoded as text or bytes. In the text department, this includes symbols and words (for example, a name), the contents of text files loaded into memory, internet addresses, Python source code, etc.
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Strings can also be used to contain raw bytes used for media files and network transfers, as well as encoded and decoded forms of non-ASCII Unicode text used in internationalized programs.
Strings are available in all programming languages. Strings in Python have the same role as arrays in other programming languages such as C and C ++, but they are a bit higher tool than arrays. Unlike C and C ++, in Python strings come with a powerful set of processing tools. Unlike other programming languages, Python does not have a distinct type for individual characters; instead, you just use single-character strings.
Python Interview Questions on Strings
Now in this section, I will take you through some important Python interview questions on Strings. I am not saying that these are the only important questions but they are enough to get an idea what kind of interview questions you can get as a Python developer based on strings.
Can the “find” string method be used to find a list?
No, because the methods are always type-specific; that is, they only work on one type of data. Expressions like X + Y and built-in functions like len(X), however, are generic and can work on a variety of types. In this case, for example, the membership expression has a similar effect to the string find method, but it can be used to search for both strings and lists.
Can a string slice expression be used in a list?
Yes, unlike methods, expressions are generic and apply to many types. In this case, the slice expression is a sequence operation, it works on any type of sequence object, including strings, lists, and tuples. The only difference is that when you break up a list, you get a new one.
How would you convert a character to its integer ASCII code? How would you convert the reverse, from an integer to a character?
The built-in ord(S) function converts from a one-character string to an integer character code; chr(I) converts the entire code to a string. Keep in mind, however, that these integers are only ASCII codes for text whose characters are only drawn from the ASCII character set. In the Unicode model, text strings are sequences of Unicode code points identifying integers, which may fall outside the 7-bit range of numbers reserved by ASCII.
How can you change a string in Python?
Strings cannot be changed as they are immutable, unlike lists. However, you can achieve a similar effect by creating a new string, concatenating, slicing, running formatting expressions, or using a method call like replace, and then assigning the result to the variable name of origin.
So these were some important Python interview questions on Strings. I hope you liked this article, Feel free to ask your valuable questions in the comments section below.