What high level design encompasses in HLD - Practice Problems & Coding Challenges

Challenge - 5 Problems

🧠 Conceptual

intermediate

Key components of High Level Design

Which of the following best describes what High Level Design (HLD) includes?

A Unit test cases and code-level logic

B Overall system architecture, major components, and their interactions

C Detailed database schema and exact API endpoints

D User interface pixel-perfect design and color schemes

💡 Hint

Think about the big picture view of the system rather than detailed parts.

High Level Design focuses on the overall system structure, major modules, and how they communicate. It does not go into detailed code or UI specifics.

❓ Architecture

intermediate

Identifying High Level Design elements in a system

Which of the following is NOT typically part of High Level Design?

A Specifying exact class methods and variables

B Describing data flow between components

C Defining system modules and their responsibilities

D Choosing technology stack and protocols

💡 Hint

Consider what level of detail HLD usually avoids.

HLD does not specify exact class methods or variables; that is part of Low Level Design (LLD).

❓ scaling

advanced

High Level Design considerations for scalability

When creating a High Level Design for a scalable web application, which design aspect is most important to include?

A Exact UI element positioning for mobile devices

B Detailed SQL query optimization techniques

C Load balancing and distributed system components

D Specific error handling code snippets

💡 Hint

Think about how the system handles many users and traffic.

Load balancing and distributed components are key to scalability and are part of High Level Design.

❓ tradeoff

advanced

Tradeoffs in High Level Design decisions

Which tradeoff is commonly considered during High Level Design?

A Deciding exact variable names for code clarity

B Writing unit tests for each function

C Selecting font sizes for user readability

D Choosing between synchronous and asynchronous communication for system modules

💡 Hint

Focus on communication patterns between components.

High Level Design involves decisions like synchronous vs asynchronous communication which affect performance and complexity.

❓ estimation

expert

Estimating capacity in High Level Design

You are designing a High Level Design for a video streaming service expecting 10 million daily users. Which capacity estimate is most relevant at this stage?

A Number of servers needed to handle peak concurrent streams

B Exact database schema for user profiles

C Detailed UI wireframes for video player controls

D Specific error messages for playback failures

💡 Hint

Consider what affects system capacity and performance at a high level.

Estimating the number of servers for peak load is a critical capacity planning aspect in High Level Design.