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4 Types of Algorithms For Interview

In this article we are going to see 4 types of algorithms that are important for and software engineering and are asking in interviews.

Searching

Searching Algorithms are designed to check for an element or retrieve an element from any data structure where it is stored.

Below are the types of Searching Algorithms

  • Binary Search
  • Linear Search
  • Breadth-First Search
  • Depth-First Search

Sorting

A Sorting Algorithm is used to rearrange a given array or list of elements according to comparison operator on the elements.

Here are the types of Searching Algorithms

  • Bubble Sort
  • Merge Sort
  • Quick Sort

Divide and Conquer

This algorithm can be divided in three parts:

  • Divide: This involves dividing the problem into smaller sub-problems.
  • Conquer: Solve sub-problems by calling recursively until solved.
  • Combine: Combine the sub-problems to get the final solution of the whole problem.

Dynamic Programming!

Dynamic Programming is mainly an optimization over plain recursion. Wherever we see a recursive solution that has repeated calls for same inputs, we can optimize it using Dynamic Programming. The idea is to simply store the results of sub problems, so that we do not have to re-compute them when needed later. For example, if we write simple recursive solution for Fibonacci Numbers, we get exponential time complexity and if we optimize it by storing solutions of sub problems, time complexity reduces to linear.

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