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LINQ MCQs and Answers with Explanation: Welcome to this set of Multiple Choice Questions on LINQ (Language Integrated Query). LINQ is a powerful tool that allows developers to query different data sources using a unified syntax in C#. This LINQ Quiz will test your understanding of the various concepts of LINQ, including LINQ queries, lambda expressions, LINQ to XML, and more.
LINQ MCQ Questions and Answers
Whether you are a beginner or an experienced programmer, these LINQ Multiple Choice Questions will help you sharpen your skills and deepen your knowledge of LINQ. So, let’s dive in and check the LINQ Online Test or go through these Top MCQs on LINQ to see how much you know about this important technology.
LINQ Multiple Choice Questions
| Name | LINQ |
| Exam Type | MCQ (Multiple Choice Questions) |
| Category | Technical Quiz |
| Mode of Quiz | Online |
Top 65 LINQ MCQs | Practice LINQ Online Quiz
1. Which method is used to filter data in LINQ?
a) Select
b) Where
c) GroupBy
d) OrderBy
Answer: b) Where.
Explanation: The Where method is used to filter data based on a specified condition.
2. Which operator is used to concatenate two sequences in LINQ?
a) Union
b) Concat
c) Intersect
d) Except
Answer: b) Concat.
Explanation: The Concat operator is used to concatenate two sequences in LINQ.
3. Which method is used to select a single element from a sequence in LINQ?
a) Select
b) Where
c) First
d) Any
Answer: c) First.
Explanation: The First method is used to select the first element from a sequence that satisfies a specified condition.
4. Which operator is used to join two sequences in LINQ?
a) Union
b) Concat
c) Intersect
d) Join
Answer: d) Join.
Explanation: The Join operator is used to join two sequences based on a common key.
5. Which method is used to sort data in LINQ?
a) Select
b) Where
c) GroupBy
d) OrderBy
Answer: d) OrderBy.
Explanation: The OrderBy method is used to sort data in ascending order based on a specified property.
6. Which operator is used to combine the results of two queries in LINQ?
a) Union
b) Concat
c) Intersect
d) Except
Answer: a) Union.
Explanation: The Union operator is used to combine the results of two queries in LINQ.
7. Which method is used to group data in LINQ?
a) Select
b) Where
c) GroupBy
d) OrderBy
Answer: c) GroupBy.
Explanation: The GroupBy method is used to group data based on a specified property.
8. Which method is used to count the number of elements in a sequence in LINQ?
a) Select
b) Where
c) Count
d) Sum
Answer: c) Count.
Explanation: The Count method is used to count the number of elements in a sequence that satisfies a specified condition.
9. Which operator is used to find the intersection of two sequences in LINQ?
a) Union
b) Concat
c) Intersect
d) Except
Answer: c) Intersect.
Explanation: The Intersect operator is used to find the intersection of two sequences in LINQ.
10. Which method is used to select a single element from a sequence in LINQ, or return a default value if no such element exists?
a) Select
b) Where
c) FirstOrDefault
d) SingleOrDefault
Answer: c) FirstOrDefault.
Explanation: The FirstOrDefault method is used to select the first element from a sequence that satisfies a specified condition, or return a default value if no such element exists.
11. Which operator is used to find the difference between two sequences in LINQ?
a) Union
b) Concat
c) Intersect
d) Except
Answer: d) Except.
Explanation: The Except operator is used to find the difference between two sequences in LINQ.
12. Which method is used to select a subset of data from a sequence in LINQ?
a) Select
b) Where
c) Skip
d) Take
Answer: d) Take.
Explanation: The Take method is used to select a specified number of elements from a sequence.
13. Which method is used to select a subset of data from a sequence in LINQ, starting from a specified position?
a) Select
b) Where
c) Skip
d) Take
Answer: c) Skip.
Explanation: The Skip method is used to skip a specified number of elements from a sequence, starting from a specified position.
14. Which method is used to return distinct elements from a sequence in LINQ?
a) Select
b) Where
c) Distinct
d) GroupBy
Answer: c) Distinct.
Explanation: The Distinct method is used to return distinct elements from a sequence.
15. Which operator is used to check whether a sequence contains any elements in LINQ?
a) Any
b) All
c) Contains
d) Exists
Answer: a) Any.
Explanation: The Any operator is used to check whether a sequence contains any elements that satisfy a specified condition.
16. Which method is used to select a subset of data from a sequence in LINQ, based on a specified condition?
a) Select
b) Where
c) Skip
d) Take
Answer: b) Where.
Explanation: The Where method is used to select a subset of data from a sequence based on a specified condition.
17. Which method is used to calculate the sum of a sequence in LINQ?
a) Select
b) Where
c) Count
d) Sum
Answer: d) Sum.
Explanation: The Sum method is used to calculate the sum of a sequence that satisfies a specified condition.
18. Which operator is used to check whether all elements in a sequence satisfy a specified condition in LINQ?
a) Any
b) All
c) Contains
d) Exists
Answer: b) All.
Explanation: The All operator is used to check whether all elements in a sequence satisfy a specified condition.
19. Which method is used to return the maximum value in a sequence in LINQ?
a) Select
b) Where
c) Max
d) Average
Answer: c) Max.
Explanation: The Max method is used to return the maximum value in a sequence that satisfies a specified condition.
20. Which method is used to return the average value in a sequence in LINQ?
a) Select
b) Where
c) Max
d) Average
Answer: d) Average.
Explanation: The Average method is used to return the average value in a sequence that satisfies a specified condition.
21. Which operator is used to create a sequence of repeated elements in LINQ?
a) Repeat
b) Range
c) Empty
d) DefaultIfEmpty
Answer: a) Repeat.
Explanation: The Repeat operator is used to create a sequence of repeated elements in LINQ.
22. Which method is used to return the first element from a sequence in LINQ?
a) Select
b) Where
c) First
d) Single
Answer: c) First.
Explanation: The First method is used to return the first element from a sequence that satisfies a specified condition.
23. Which method is used to return the last element from a sequence in LINQ?
a) Select
b) Where
c) Last
d) Single
Answer: c) Last.
Explanation: The Last method is used to return the last element from a sequence that satisfies a specified condition.
24. Which method is used to return a specified number of elements from the end of a sequence in LINQ?
a) Select
b) Where
c) SkipLast
d) TakeLast
Answer: d) TakeLast.
Explanation: The TakeLast method is used to return a specified number of elements from the end of a sequence.
25. Which method is used to return a single element from a sequence in LINQ, or throw an exception if more than one element satisfies the specified condition?
a) Select
b) Where
c) First
d) Single
Answer: d) Single.
Explanation: The Single method is used to return a single element from a sequence that satisfies a specified condition, or throw an exception if more than one element satisfies the condition.
26. Which method is used to order elements in a sequence in ascending order in LINQ?
a) OrderBy
b) OrderByDescending
c) ThenBy
d) ThenByDescending
Answer: a) OrderBy.
Explanation: The OrderBy method is used to order elements in a sequence in ascending order based on a specified key.
27. Which method is used to order elements in a sequence in descending order in LINQ?
a) OrderBy
b) OrderByDescending
c) ThenBy
d) ThenByDescending
Answer: b) OrderByDescending.
Explanation: The OrderByDescending method is used to order elements in a sequence in descending order based on a specified key.
28. Which method is used to perform an inner join operation between two sequences in LINQ?
a) Join
b) GroupJoin
c) InnerJoin
d) OuterJoin
Answer: a) Join.
Explanation: The Join method is used to perform an inner join operation between two sequences based on a specified key.
29. Which method is used to perform a group join operation between two sequences in LINQ?
a) Join
b) GroupJoin
c) InnerJoin
d) OuterJoin
Answer: b) GroupJoin.
Explanation: The GroupJoin method is used to perform a group join operation between two sequences based on a specified key.
30. Which method is used to perform a left outer join operation between two sequences in LINQ?
a) Join
b) GroupJoin
c) InnerJoin
d) LeftJoin
Answer: d) LeftJoin.
Explanation: The LeftJoin method is used to perform a left outer join operation between two sequences based on a specified key.
31. Which method is used to perform a right outer join operation between two sequences in LINQ?
a) Join
b) GroupJoin
c) InnerJoin
d) RightJoin
Answer: d) RightJoin.
Explanation: The RightJoin method is used to perform a right outer join operation between two sequences based on a specified key.
32. Which method is used to perform a full outer join operation between two sequences in LINQ?
a) Join
b) GroupJoin
c) InnerJoin
d) FullJoin
Answer: d) FullJoin.
Explanation: The FullJoin method is used to perform a full outer join operation between two sequences based on a specified key.
33. Which method is used to convert a sequence of one type into a sequence of another type in LINQ?
a) Select
b) Where
c) Cast
d) OfType
Answer: c) Cast.
Explanation: The Cast method is used to convert a sequence of one type into a sequence of another type.
34. Which method is used to filter a sequence based on a specified type in LINQ?
a) Select
b) Where
c) Cast
d) OfType
Answer: d) OfType.
Explanation: The OfType method is used to filter a sequence based on a specified type.
35. Which method is used to create a sequence of numbers in LINQ?
a) Repeat
b) Range
c) Empty
d) DefaultIfEmpty
Answer: b) Range.
Explanation: The Range method is used to create a sequence of numbers in LINQ.
36. Which method is used to create an empty sequence in LINQ?
a) Repeat
b) Range
c) Empty
d) DefaultIf
Answer: c) Empty.
Explanation: The Empty method is used to create an empty sequence in LINQ.
37. Which method is used to repeat a sequence a specified number of times in LINQ?
a) Repeat
b) Range
c) Empty
d) DefaultIfEmpty
Answer: a) Repeat.
Explanation: The Repeat method is used to repeat a sequence a specified number of times in LINQ.
38. Which method is used to return the default value of a specified type if a sequence is empty in LINQ?
a) Repeat
b) Range
c) Empty
d) DefaultIfEmpty
Answer: d) DefaultIfEmpty.
Explanation: The DefaultIfEmpty method is used to return the default value of a specified type if a sequence is empty in LINQ.
39. Which method is used to perform a distinct operation on a sequence in LINQ?
a) Distinct
b) Unique
c) Uniq
d) Dist
Answer: a) Distinct.
Explanation: The Distinct method is used to perform a distinct operation on a sequence in LINQ.
40. Which method is used to perform a union operation between two sequences in LINQ?
a) Union
b) Concat
c) Merge
d) Join
Answer: a) Union.
Explanation: The Union method is used to perform a union operation between two sequences in LINQ.
41. Which method is used to concatenate two sequences in LINQ?
a) Union
b) Concat
c) Merge
d) Join
Answer: b) Concat.
Explanation: The Concat method is used to concatenate two sequences in LINQ.
42. Which method is used to perform an intersect operation between two sequences in LINQ?
a) Intersect
b) Except
c) Union
d) Concat
Answer: a) Intersect.
Explanation: The Intersect method is used to perform an intersect operation between two sequences in LINQ.
43. Which method is used to perform an except operation between two sequences in LINQ?
a) Intersect
b) Except
c) Union
d) Concat
Answer: b) Except.
Explanation: The Except method is used to perform an except operation between two sequences in LINQ.
44. Which method is used to perform a merge operation between two sequences in LINQ?
a) Intersect
b) Except
c) Union
d) Zip
Answer: d) Zip.
Explanation: The Zip method is used to perform a merge operation between two sequences in LINQ.
45. Which method is used to partition a sequence into a sequence of smaller sequences in LINQ?
a) Partition
b) Split
c) Chunk
d) GroupBy
Answer: c) Chunk.
Explanation: The Chunk method is used to partition a sequence into a sequence of smaller sequences in LINQ.
46. Which method is used to group a sequence based on a specified key in LINQ?
a) Group
b) Partition
c) Chunk
d) GroupBy
Answer: d) GroupBy.
Explanation: The GroupBy method is used to group a sequence based on a specified key in LINQ.
47. Which method is used to perform an aggregate operation on a sequence in LINQ?
a) Aggregate
b) Reduce
c) Combine
d) Merge
Answer: a) Aggregate.
Explanation: The Aggregate method is used to perform an aggregate operation on a sequence in LINQ.
48. Which method is used to return the maximum element in a sequence in LINQ?
a) Max
b) Min
c) Sum
d) Average
Answer: a) Max.
Explanation: The Max method is used to return the maximum element in a sequence in LINQ.
49. Which method is used to return the minimum element in a sequence in LINQ?
a) Max
b) Min
c) Sum
d) Average
Answer: b) Min.
Explanation: The Min method is used to return the minimum element in a sequence in LINQ.
50. Which method is used to return the sum of elements in a sequence in LINQ?
a) Max
b) Min
c) Sum
d) Average
Answer: c) Sum.
Explanation: The Sum method is used to return the sum of elements in a sequence in LINQ.
51. Which method is used to return the average of elements in a sequence in LINQ?
a) Max
b) Min
c) Sum
d) Average
Answer: d) Average.
Explanation: The Average method is used to return the average of elements in a sequence in LINQ.
52. Which method is used to sort a sequence in ascending order in LINQ?
a) OrderBy
b) OrderByDescending
c) Sort
d) Reverse
Answer: a) OrderBy.
Explanation: The OrderBy method is used to sort a sequence in ascending order in LINQ.
53. Which method is used to sort a sequence in descending order in LINQ?
a) OrderBy
b) OrderByDescending
c) Sort
d) Reverse
Answer: b) OrderByDescending.
Explanation: The OrderByDescending method is used to sort a sequence in descending order in LINQ.
54. Which method is used to reverse the order of elements in a sequence in LINQ?
a) OrderBy
b) OrderByDescending
c) Sort
d) Reverse
Answer: d) Reverse.
Explanation: The Reverse method is used to reverse the order of elements in a sequence in LINQ.
55. Which method is used to skip a specified number of elements in a sequence in LINQ?
a) Take
b) Skip
c) SubSequence
d) Subset
Answer: b) Skip.
Explanation: The Skip method is used to skip a specified number of elements in a sequence in LINQ.
56. Which method is used to take a specified number of elements from the beginning of a sequence in LINQ?
a) Take
b) Skip
c) SubSequence
d) Subset
Answer: a) Take.
Explanation: The Take method is used to take a specified number of elements from the beginning of a sequence in LINQ.
57. Which method is used to return a specified number of contiguous elements from a sequence in LINQ?
a) Take
b) Skip
c) SubSequence
d) Subset
Answer: c) SubSequence.
Explanation: The SubSequence method is used to return a specified number of contiguous elements from a sequence in LINQ.
58. Which method is used to return a specified number of non-contiguous elements from a sequence in LINQ?
a) Take
b) Skip
c) SubSequence
d) Subset
Answer: d) Subset.
Explanation: The Subset method is used to return a specified number of non-contiguous elements from a sequence in LINQ.
59. Which method is used to join two sequences based on a specified key in LINQ?
a) Join
b) Concat
c) Union
d) Merge
Answer: a) Join.
Explanation: The Join method is used to join two sequences based on a specified key in LINQ.
60. Which method is used to group join two sequences based on a specified key in LINQ?
a) Join
b) Concat
c) Union
d) GroupJoin
Answer: d) GroupJoin
Explanation: The GroupJoin method is used to group join two sequences based on a specified key in LINQ.
61. Which method is used to return the set union of two sequences in LINQ?
a) Join
b) Concat
c) Union
d) Merge
Answer: c) Union.
Explanation: The Union method is used to return the set union of two sequences in LINQ.
62. Which method is used to return the set intersection of two sequences in LINQ?
a) Intersect
b) Except
c) Union
d) Concat
Answer: a) Intersect.
Explanation: The Intersect method is used to return the set intersection of two sequences in LINQ.
63. Which method is used to return the set difference of two sequences in LINQ?
a) Intersect
b) Except
c) Union
d) Concat
Answer: b) Except.
Explanation: The Except method is used to return the set difference of two sequences in LINQ.
64. Which method is used to select a subset of elements based on a specified condition in LINQ?
a) Where
b) Select
c) Filter
d) Subset
Answer: a) Where.
Explanation: The Where method is used to select a subset of elements based on a specified condition in LINQ.
65. Which method is used to project each element of a sequence into a new form in LINQ?
a) Where
b) Select
c) Filter
d) Map
Answer: b) Select.
Explanation: The Select method is used to project each element of a sequence into a new form in LINQ.
Tthese MCQs on LINQ provides an excellent opportunity for developers to assess their understanding of this powerful technology. By answering these questions, developers can test their knowledge of various aspects of LINQ and identify areas where they need to improve. Whether you are working on a new project or trying to improve your skills, LINQ is a tool that every developer should be familiar with. So, we hope that these LINQ Multiple Choice Questions have been helpful in deepening your understanding of LINQ and its various concepts. Keep practicing and happy coding! Keep browsing our Freshersnow to know more technical quizzes like this.