You want to project a list of anonymous objects with Id and NameLength for the length of Name from a list of Person. Which LINQ query achieves this?
hard🚀 Application Q9 of Q15
C Sharp (C#) - LINQ Fundamentals
You want to project a list of anonymous objects with Id and NameLength for the length of Name from a list of Person. Which LINQ query achieves this?
Avar result = from p in people select new { p.Id, NameLength = p.Name.Length };
Bvar result = from p in people select new { p.Id, p.Name.Length };
Cvar result = from p in people select new { Id = p.Id, Length(p.Name) };
Dvar result = from p in people select new { p.Id, Length = p.Name.Length() };
Step-by-Step Solution
Solution:
Step 1: Understand anonymous object syntax
Anonymous objects can have named properties with expressions, e.g., NameLength = p.Name.Length.
Step 2: Check each option
var result = from p in people select new { p.Id, NameLength = p.Name.Length }; correctly names the length property. var result = from p in people select new { p.Id, p.Name.Length }; misses property name, C uses invalid syntax, D incorrectly calls Length as method.
Final Answer:
var result = from p in people select new { p.Id, NameLength = p.Name.Length }; -> Option A
Quick Check:
Anonymous object with named properties [OK]
Quick Trick:Name properties explicitly in anonymous objects [OK]
Common Mistakes:
MISTAKES
Omitting property names in anonymous types
Using method syntax incorrectly
Confusing property access with method call
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