KISS (Keep It Simple) in LLD - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to apply the KISS principle by choosing the simplest design approach.

LLD

def design_system():
    # Use [1] to keep the system simple and maintainable
    pass

Drag options to blanks, or click blank then click option'

Aexcessive_features

Bsimple_components

Cover_engineering

Dcomplex_architecture

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing complex or over-engineered solutions.

The KISS principle encourages using simple components to keep the system easy to understand and maintain.

2fill in blank

medium

Complete the code to follow KISS by selecting the best way to handle user requests.

LLD

def handle_request(request):
    # Process request using [1] for clarity and simplicity
    pass

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Acomplex_state_management

Bmultiple_nested_conditions

Cdeeply_nested_loops

Dclear_and_simple_logic

Attempts:

3 left

💡 Hint

Common Mistakes

Using deeply nested conditions or loops.

Clear and simple logic helps keep the system easy to understand and reduces bugs.

3fill in blank

hard

Fix the error in the design by selecting the simplest way to manage data flow.

LLD

def data_flow():
    # Avoid [1] to keep data flow simple and easy to debug
    pass

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Asimple_function_calls

Bstraightforward_sequential_flow

Cunnecessary_event_driven_complexity

Dclear_data_paths

Attempts:

3 left

💡 Hint

Common Mistakes

Adding complex event-driven layers unnecessarily.

Unnecessary event-driven complexity can make data flow hard to follow, violating KISS.

4fill in blank

hard

Fill both blanks to design a simple and scalable system using KISS.

LLD

def build_system():
    components = [1]
    communication = [2]
    return components, communication

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Amodular_services

Bmonolithic_code

Csimple_message_passing

Dcomplex_event_brokers

Attempts:

3 left

💡 Hint

Common Mistakes

Using monolithic code or complex event brokers unnecessarily.

Modular services with simple message passing keep the system simple and scalable.

5fill in blank

hard

Fill all three blanks to implement a simple caching mechanism following KISS.

LLD

def cache_data(key, value):
    cache = [1]
    if key not in cache:
        cache[key] = [2]
    return cache.get(key, [3])

Drag options to blanks, or click blank then click option'

A{}

Bvalue

CNone

D[]

Attempts:

3 left

💡 Hint

Common Mistakes

Using complex data structures or default values that complicate logic.

Using a simple dictionary for cache, storing the value, and returning None if missing keeps caching simple.