Grokking the Engineering Manager Coding Interview
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Sara Kim
Element Types in an Array

Sara Kim

Feb 5, 2026

  • Same Data Type: All elements are of one type (e.g., int, float, string).

I thought the elements in an array don't necessarily have the same type. It depends on the programming language. For example, Python and Javascript allow you to have different types of elements in an array.

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What Is an Array?

Key Points

Why Do We Need Arrays?

Memory Representation of an Array

How Arrays Are Stored in Memory

Memory Layout Example

Static vs. Dynamic Arrays

  1. Static Arrays
  1. Dynamic Arrays
  1. Static Vs. Dynamic Arrays Comparision

Which One Should You Use?

Basic Concepts and Operations in Arrays

  1. Accessing Elements
  1. Inserting Elements
  1. Deleting Elements
  1. Searching for an Element
  1. Updating an Element

Key Considerations for Arrays in Coding Interviews

  1. Validate Assumptions
  1. Handle Boundaries
  1. Efficiency Considerations
  1. Loops & Naming
  1. Algorithm Choice
  1. Testing & Edge Cases
  1. Handling Special Values
  1. Modifying While Iterating
  1. Array Methods