Tools Developer Interview Questions and Answers

Composition allows for flexible code reuse and better separation of concerns compared to inheritance in object-oriented design.

• Flexibility: Composition allows you to change behavior at runtime by swapping out components, unlike inheritance which is static.

• Separation of Concerns: By composing objects, you can keep different functionalities separate, making the codebase easier to manage.

• Example: A Car class can use Engine and Wheel classes through composition instead of inherit...read more

Various methods exist to reverse a string, including built-in functions, loops, recursion, and using data structures.

• Using Python slicing: `reversed_string = original_string[::-1]`

• Using the built-in `reversed()` function: `reversed_string = ''.join(reversed(original_string))`

• Using a loop: `reversed_string = '' for char in original_string: reversed_string = char + reversed_string`

• Using recursion: `def reverse(s): return s[-1] + reverse(s[:-1]) if s else ''`

• Using a stack: `stac...read more

The default keyword is used in C++ for defining default constructors and in switch statements for handling unmatched cases.

• In C++, the default keyword can define a default constructor: `ClassName() = default;`.

• In switch statements, the default case handles any unmatched cases: `switch(x) { case 1: ...; default: ...; }`.

• Using default constructors simplifies class definitions when no custom initialization is needed.

• The default case in switch statements ensures that all possible...read more

Use collections to efficiently remove duplicates from an array of strings.

• Utilize a Set to store unique elements. Example: Set<String> uniqueStrings = new HashSet<>(Arrays.asList(array));

• Convert the Set back to an array if needed. Example: String[] resultArray = uniqueStrings.toArray(new String[0]);

• This method is efficient as Sets do not allow duplicate entries.