Search and filter design in LLD - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define the main component responsible for handling search queries.

LLD

class [1]Handler:
    def __init__(self, data_source):
        self.data_source = data_source

    def search(self, query):
        # Implementation to search data_source
        pass

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

AQuery

BFilter

CSearch

DResult

Attempts:

3 left

💡 Hint

Common Mistakes

Using generic names like 'ResultHandler' which do not clearly indicate search responsibility.

The main class handling search queries should be named SearchHandler to clearly represent its responsibility.

2fill in blank

medium

Complete the code to add a filter method that narrows down results based on a condition.

LLD

class FilterHandler:
    def __init__(self, items):
        self.items = items

    def filter(self, condition):
        return [item for item in self.items if item.[1](condition)]

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

Afilters

Bmatches

Cequals

Dcontains

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'filters' which is not a valid method on items.

Using 'equals' which checks for exact match, not containment.

The method contains is commonly used to check if an item includes a condition, suitable for filtering.

3fill in blank

hard

Fix the error in the code to correctly combine search and filter results.

LLD

def search_and_filter(data, query, filter_condition):
    search_results = [item for item in data if query in item]
    filtered_results = [item for item in search_results if item.[1](filter_condition)]
    return filtered_results

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

Afilter

Bcontains

Cequals

Dmatches

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'filter' which is not a method on string or list items.

Using 'equals' which requires exact match.

The contains method is appropriate to check if the item includes the filter condition.

4fill in blank

hard

Fill both blanks to create a dictionary comprehension that maps items to their lengths only if length is greater than 3.

LLD

length_map = {item: len(item) for item in items if len(item) [1] 3 and 'a' [2] item}

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

A>

B<

Cin

Dnot in

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' instead of '>' for length comparison.

Using 'not in' instead of 'in' for membership check.

The condition checks if length is greater than 3 and if 'a' is in the item.

5fill in blank

hard

Fill all three blanks to create a filtered dictionary with uppercase keys and values greater than 10.

LLD

filtered_dict = {item[1]: value for item, value in data.items() if value [2] 10 and item[3]('x')}

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

A.upper()

B>

Cendswith

Dstartswith

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'endswith' instead of 'startswith' for key filtering.

Using '<' instead of '>' for value comparison.

The keys are converted to uppercase, values filtered greater than 10, and keys starting with 'x'.