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LINQ Filter For a List of Greater Integers

Certification: Intermediate Level Accuracy: 60% Submissions: 5 Points: 10

Write a C# program to implement a method that uses LINQ to filter a list of integers greater than a specified value.

Example 1
    
  
  • Input: 
      
      
    • List<int> numbers = new List<int> { 30, 65, 20, 80, 45, 90, 10 };
      • 
      
    • int threshold = 50;
      • 
    
    
  
    • 
  
  • Output: 
      
      
    • [65, 80, 90]
      • 
    
    
  
    • 
  
  • Explanation: 
      
      
    • Step 1: Check if the input list is null. It's not, so continue.
      • 
      
    • Step 2: Filter the list [30, 65, 20, 80, 45, 90, 10] for numbers greater than 50.
      • 
      
    • Step 3: The filtered list contains [65, 80, 90].
      • 
      
    • Step 4: Sort the list in ascending order, which is already [65, 80, 90].
      • 
      
    • Step 5: Return the filtered and sorted list.
      • 
    
    
  
    •
Example 2
    
  
  • Input: 
      
      
    • List<int> numbers = new List<int> { 5, 10, 15, 20, 25 };
      • 
      
    • int threshold = 50;
      • 
    
    
  
    • 
  
  • Output: 
      
      
    • []
      • 
    
    
  
    • 
  
  • Explanation: 
      
      
    • Step 1: Check if the input list is null. It's not, so continue.
      • 
      
    • Step 2: Filter the list [5, 10, 15, 20, 25] for numbers greater than 50.
      • 
      
    • Step 3: None of the values are greater than 50.
      • 
      
    • Step 4: Return an empty list [].
      • 
    
    
  
    •
Constraints
    
  
  • 0 ≤ numbers.Count ≤ 10^5
    • 
  
  • -10^9 ≤ numbers[i] ≤ 10^9
    • 
  
  • -10^9 ≤ threshold ≤ 10^9
    • 
  
  • Time Complexity: O(n log n) due to sorting
    • 
  
  • Space Complexity: O(n) for the filtered list
    •
Functions / MethodsListAdobeSwiggy
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Hint
Solution

Solution Hints

    
  
  • Use LINQ's `Where()` method to filter elements based on the condition
    • 
  
  • Apply `OrderBy()` to sort the filtered elements
    • 
  
  • Use `ToList()` to convert the LINQ query result to a List
    • 
  
  • Add null checks and empty list validation at the beginning
    • 
  
  • For large datasets, consider optimizing the LINQ query execution
    •

Steps to solve by this approach:

 Step 1: Validate input by checking if the list is null.
 Step 2: Use LINQ's Where() method to filter elements greater than the threshold.
 Step 3: Apply OrderBy() to sort the filtered elements in ascending order.
 Step 4: Convert the result to a List using ToList().
 Step 5: Return the filtered and sorted list.

Submitted Code :