What is the purpose of the DefaultIfEmpty operator in LINQ?
A. Returns the number of elements in a sequence
B. Returns a default value if a sequence is empty
C. Returns a specific element from a sequence
D. None of the above
Answer: Option B
A. Returns the number of elements in a sequence
B. Returns a default value if a sequence is empty
C. Returns a specific element from a sequence
D. None of the above
Answer: Option B
What does LINQ stand for in C#?
A. Lightweight Query
B. Linked Query
C. Language-Integrated Query
D. Loaded Query
Which namespace in C# provides the LINQ extension methods?
A. System.Query
B. System.Linq
C. System.Data
D. None of the above
What is the purpose of the Select operator in LINQ?
A. Groups the elements of a sequence
B. Orders the elements of a sequence
C. Projects each element of a sequence
D. Filters a sequence based on a predicate
In LINQ, what is the purpose of the Where operator?
A. Projects each element of a sequence
B. Orders the elements of a sequence
C. Groups the elements of a sequence
D. Filters a sequence based on a predicate
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