Question 1

How does binary search work and what are its requirements?

Accepted Answer

# How Binary Search Works and What It Requires (Python)

**Target Audience:** Beginners preparing for coding interviews; you only need to know arrays and loops.
**Difficulty:** Easy
**Language:** Python 3

> **How to read this doc:** Every idea is explained in plain language first, then tagged with `📌 Interview term:` so you also learn the exact word an interviewer expects. All code is Python, and every output block was produced by actually running the programs (Python 3.13.16); nothing is quot

Question 2

How do you search in a rotated sorted array?

Accepted Answer

# Searching a Rotated Sorted Array (Python)

**Target Audience:** Learners who know basic binary search and are preparing for coding interviews.
**Difficulty:** Medium
**Language:** Python 3

> **How to read this doc:** Every idea is explained in plain language first, then tagged with `📌 Interview term:` so you also learn the exact word an interviewer expects. All code is Python, and every output block was produced by actually running the programs (Python 3.13.16); nothing is quoted from memory

Question 3

How do you search a sorted 2D matrix?

Accepted Answer

**Target Audience:** Beginners preparing for coding interviews — you should know arrays, nested lists and loops; binary search is linked and summarised.
**Difficulty:** Medium
**Language:** Python 3

> **How to read this doc:** Each idea is explained in plain language first, then tagged with `📌 Interview term:` so you also learn the exact words an interviewer expects. Every output, step count and ordering claim below was produced by actually running the Python programs in the **Verified** secti

Question 4

What is binary search on the answer?

Accepted Answer

# Binary Search on the Answer (Python)

**Target Audience:** Learners who know basic binary search and want to apply it to optimisation problems.
**Difficulty:** Medium
**Language:** Python 3

> **How to read this doc:** Every idea is explained in plain language first, then tagged with `📌 Interview term:` so you also learn the exact word an interviewer expects. All code is Python, and every output block was produced by actually running the programs (Python 3.13.16); nothing is quoted from memor

Question 5

How do you find a peak element in an array?

Accepted Answer

**Target Audience:** Beginners preparing for coding interviews — you should know what an array and a loop are; binary search is explained from scratch.
**Difficulty:** Medium
**Language:** Python 3

> **How to read this doc:** Each idea is explained in plain language first, then tagged with `📌 Interview term:` so you also learn the exact words an interviewer expects. Every output, step count and ordering claim below was produced by actually running the Python programs in the **Verified** sectio

DATA STRUCTURES & ALGORITHMSDECODED.

Easy

How does binary search work and what are its requirements?

Medium

How do you search in a rotated sorted array?

How do you search a sorted 2D matrix?

What is binary search on the answer?

How do you find a peak element in an array?