Altimetrik Interview Questions, Process, and Tips

Decorators are functions that modify the behavior of other functions without changing their source code.

• Decorators are denoted by the '@' symbol followed by the decorator function name.

• They can be used to add functionality to a function, such as logging or timing.

• Decorators can also be used to modify the behavior of a class or method.

• They are commonly used in web frameworks like Flask and Django.

• Examples of built-in de...read more

Namespace is a container that holds identifiers (names) used to avoid naming conflicts.

• Namespace is created at different moments and has different lifetimes.

• Python implements namespaces as dictionaries.

• There are four types of namespaces in Python: built-in, global, local, and non-local.

• Namespaces can be accessed using the dot (.) operator.

• Example: 'import math' creates a namespace 'math' that contains all the functions

Algorithm to solve Sudoku puzzle

• Create a 9x9 grid to represent the puzzle

• Fill in known numbers

• For each empty cell, try numbers 1-9 until a valid number is found

• Backtrack if no valid number can be found

• Repeat until all cells are filled

Backtracking is a technique to solve problems by trying out different solutions and undoing them if they fail.

• Backtracking is used when we need to find all possible solutions to a problem.

• It involves trying out different solutions and undoing them if they fail.

• It is often used in problems involving permutations, combinations, and graph traversal.

• Examples include solving Sudoku puzzles, finding all possible paths in a m...read more

Minimum swaps needed to arrange all similar elements together in an array of strings.

• Count the frequency of each element in the array.

• Find the maximum frequency element and its index.

• Calculate the number of swaps needed to move all similar elements together.

• Repeat the above steps for all unique elements in the array.

• Add up the number of swaps needed for each unique element to get the total number of swaps needed.