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You have a list of students with their scores. You want to get a dictionary of students who scored above 70, with their names as keys and scores as values. Which LINQ query correctly does this?

hard🚀 Application Q15 of Q15

C Sharp (C#) - LINQ Fundamentals

You have a list of students with their scores. You want to get a dictionary of students who scored above 70, with their names as keys and scores as values. Which LINQ query correctly does this?

var students = new List<(string Name, int Score)>
{
    ("Alice", 85), ("Bob", 65), ("Charlie", 90)
};
var result = ???;

Astudents.Where(s => s.Score > 70).ToDictionary(s => s.Name, s => s.Score);

Bstudents.Select(s => s.Score > 70).ToDictionary(s => s.Name, s => s.Score);

Cstudents.ToDictionary(s => s.Name, s => s.Score > 70);

Dstudents.Where(s => s.Score > 70).Select(s => s.Name, s => s.Score);

Step-by-Step Solution

Solution:

Step 1: Filter students with score > 70
Use Where to select only students scoring above 70.
Step 2: Convert filtered list to dictionary
Use ToDictionary with key as Name and value as Score.
Final Answer:
students.Where(s => s.Score > 70).ToDictionary(s => s.Name, s => s.Score); -> Option A
Quick Check:
Filter then ToDictionary with correct keys and values [OK]

Quick Trick: Filter first, then convert to dictionary with keys and values [OK]

Common Mistakes:

MISTAKES

Using Select incorrectly instead of Where
Trying to create dictionary without filtering
Passing wrong arguments to ToDictionary

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