Job Interview Questions and Answers Directory

Ruby Easy technical

Q1. What is the difference between a symbol and a string?

A `Symbol` is an immutable, interned identifier such as `:name`. A `String` is a mutable sequence of characters such as `"name"`. Symbols are stored once, so repeated use...

#symbols #strings #immutability

1 Answer

C# Easy technical

Q2. When should you use StringBuilder instead of string concatenation?

`string` is immutable: every operation such as concatenation or `Replace` allocates a new string. `StringBuilder` is a mutable buffer backed by a resizable array, so appe...

#string #stringbuilder #performance

1 Answer

Rust Easy technical

Q3. What is the difference between String and &str in Rust?

`String` is an owned, growable, heap-allocated UTF-8 string (essentially a `Vec`) that you can mutate and extend. `&str` is a borrowed string slice: a pointer plus a leng...

#string #str #ownership

2 Answer

Python Medium technical

Q4. What Is Docstring In Python?

A docstring is a unique text that happens to be the first statement in the following Python constructs: Module, Function, Class, or Method def inition. A docstring gets a...

#python #strings

0 Answer

Python Medium technical

Q5. How you can convert a number to a string?

In order to convert a number into a string, use the inbuilt function str(). If you want a octal or hexadecimal representation, use the inbuilt function oct() or hex().

#python #strings

2 Answer

Python Medium technical

Q6. Create a unicode string in Python with the string "This is a test string"?

In modern **Python 3**, **all strings are Unicode by default** (`str` type represents Unicode code points encoded in UTF-8): ```python # In Python 3, this is already a na...

#python #strings

0 Answer

Python Medium technical

Q7. How to append to a string in Python?

Because Python strings are **immutable**, you cannot directly append characters to an existing string in memory. Each append creates a new string object: ### 1. The `+=` ...

#python #strings

1 Answer

Python Easy technical

Q8. How to convert a string to lowercase in Python?

Use the `.lower()` or `.casefold()` string method in Python: ```python s = 'MYSTRING' print(s.lower()) # Output: 'mystring' ``` *Tip:* `.casefold()` is recommended for ca...

#python #strings

2 Answer

Python Medium technical

Q9. How to check if string A is substring of string B?

The most readable, pythonic, and performant way to check if substring A exists inside string B is using the **`in` operator**: ```python str_b = "HireXTech Interview Prep...

#python #strings

1 Answer

Python Medium technical

Q10. Find all occurrences of a substring in Python?

There is no simple built­in string function that does what you're looking for, but you could use the more powerful regular expressions: >>>[m.start()forminre.finditer('te...

#python #strings

1 Answer