Practice C# Entity Framework MCQ questions with detailed explanations and clear answer validation. These MCQs help you revise core concepts, compare close options, and improve accuracy for interviews, certification exams, and technical screening rounds. Use this updated 2026 set to strengthen fundamentals and confidence.
Q51. Which statement about Database First is most accurate?
Select an answer to check.
Answer: Classes generated from existing DB schema.
Here, Classes generated from existing DB schema. is the right choice. Used with legacy DBs. It aligns directly with what the question asks about which statement about database first is most accurate. Competing choices sound plausible, but they miss the key condition.
Q52. How is Database First best characterized?
Select an answer to check.
Answer: Classes generated from existing DB schema.
In this case, Classes generated from existing DB schema. is correct. Used with legacy DBs. It aligns directly with what the question asks about how is database first best characterized. Competing choices sound plausible, but they miss the key condition.
Q53. Which option best describes conventions in C#/.NET?
Select an answer to check.
Answer: EF infers config (keys, table names) from naming.
The best option here is EF infers config (keys, table names) from naming.. Reduces boilerplate. It aligns directly with what the question asks about which option best describes conventions in c#/.net. Competing choices sound plausible, but they miss the key condition.
Q54. What is the primary purpose of conventions?
Select an answer to check.
Answer: EF infers config (keys, table names) from naming.
For this question, EF infers config (keys, table names) from naming. is correct. Reduces boilerplate. It aligns directly with what the question asks about what is the primary purpose of conventions. Competing choices sound plausible, but they miss the key condition.
Q55. Which statement about conventions is most accurate?
Select an answer to check.
Answer: EF infers config (keys, table names) from naming.
EF infers config (keys, table names) from naming. is the correct answer here. Reduces boilerplate. It aligns directly with what the question asks about which statement about conventions is most accurate. Competing choices sound plausible, but they miss the key condition.
Q56. How is conventions best characterized?
Select an answer to check.
Answer: EF infers config (keys, table names) from naming.
Here, EF infers config (keys, table names) from naming. is the right choice. Reduces boilerplate. This matches the core idea being tested around how is conventions best characterized. Competing choices sound plausible, but they miss the key condition.
Q57. Which option best describes data annotations in C#/.NET?
Select an answer to check.
Answer: Attributes on classes to guide mapping/validation.
In this case, Attributes on classes to guide mapping/validation. is correct. [Required], [MaxLength], etc. This matches the core idea being tested around which option best describes data annotations in c#/.net. Competing choices sound plausible, but they miss the key condition.
Q58. What is the primary purpose of data annotations?
Select an answer to check.
Answer: Attributes on classes to guide mapping/validation.
The best option here is Attributes on classes to guide mapping/validation.. [Required], [MaxLength], etc. This matches the core idea being tested around what is the primary purpose of data annotations. Competing choices sound plausible, but they miss the key condition.
Q59. Which statement about data annotations is most accurate?
Select an answer to check.
Answer: Attributes on classes to guide mapping/validation.
For this question, Attributes on classes to guide mapping/validation. is correct. [Required], [MaxLength], etc. This matches the core idea being tested around which statement about data annotations is most accurate. Competing choices sound plausible, but they miss the key condition.
Q60. How is data annotations best characterized?
Select an answer to check.
Answer: Attributes on classes to guide mapping/validation.
Attributes on classes to guide mapping/validation. is the correct answer here. [Required], [MaxLength], etc. This matches the core idea being tested around how is data annotations best characterized. Competing choices sound plausible, but they miss the key condition.
Q61. Which option best describes the fluent API in C#/.NET?
Select an answer to check.
Answer: Chained configuration in OnModelCreating.
Here, Chained configuration in OnModelCreating. is the right choice. More expressive than annotations. That is exactly the concept behind which option best describes the fluent api in in this context. Competing choices sound plausible, but they miss the key condition.
Q62. What is the primary purpose of the fluent API?
Select an answer to check.
Answer: Chained configuration in OnModelCreating.
In this case, Chained configuration in OnModelCreating. is correct. More expressive than annotations. That is exactly the concept behind what is the primary purpose of the fluent in this context. Competing choices sound plausible, but they miss the key condition.
Q63. Which statement about the fluent API is most accurate?
Select an answer to check.
Answer: Chained configuration in OnModelCreating.
The best option here is Chained configuration in OnModelCreating.. More expressive than annotations. That is exactly the concept behind which statement about the fluent api is most in this context. Competing choices sound plausible, but they miss the key condition.
Q64. How is the fluent API best characterized?
Select an answer to check.
Answer: Chained configuration in OnModelCreating.
For this question, Chained configuration in OnModelCreating. is correct. More expressive than annotations. That is exactly the concept behind how is the fluent api best characterized in this context. Competing choices sound plausible, but they miss the key condition.
Q65. Which option best describes relationships in C#/.NET?
Select an answer to check.
Answer: One-to-many, many-to-many, etc., between entities.
One-to-many, many-to-many, etc., between entities. is the correct answer here. Configured via FK and nav props. That is exactly the concept behind which option best describes relationships in c#/.net in this context. Competing choices sound plausible, but they miss the key condition.
Q66. What is the primary purpose of relationships?
Select an answer to check.
Answer: One-to-many, many-to-many, etc., between entities.
Here, One-to-many, many-to-many, etc., between entities. is the right choice. Configured via FK and nav props. It fits the requirement in the prompt about what is the primary purpose of relationships. Competing choices sound plausible, but they miss the key condition.
Q67. Which statement about relationships is most accurate?
Select an answer to check.
Answer: One-to-many, many-to-many, etc., between entities.
In this case, One-to-many, many-to-many, etc., between entities. is correct. Configured via FK and nav props. It fits the requirement in the prompt about which statement about relationships is most accurate. Competing choices sound plausible, but they miss the key condition.
Q68. How is relationships best characterized?
Select an answer to check.
Answer: One-to-many, many-to-many, etc., between entities.
The best option here is One-to-many, many-to-many, etc., between entities.. Configured via FK and nav props. It fits the requirement in the prompt about how is relationships best characterized. Competing choices sound plausible, but they miss the key condition.
Q69. Which option best describes optimistic concurrency in C#/.NET?
Select an answer to check.
Answer: Detect conflicting updates via row-version.
For this question, Detect conflicting updates via row-version. is correct. Throws DbUpdateConcurrencyException. It fits the requirement in the prompt about which option best describes optimistic concurrency in c#/.net. Competing choices sound plausible, but they miss the key condition.
Q70. What is the primary purpose of optimistic concurrency?
Select an answer to check.
Answer: Detect conflicting updates via row-version.
Detect conflicting updates via row-version. is the correct answer here. Throws DbUpdateConcurrencyException. It fits the requirement in the prompt about what is the primary purpose of optimistic concurrency. Competing choices sound plausible, but they miss the key condition.
Q71. Which statement about optimistic concurrency is most accurate?
Select an answer to check.
Answer: Detect conflicting updates via row-version.
Here, Detect conflicting updates via row-version. is the right choice. Throws DbUpdateConcurrencyException. This is the most accurate statement for which statement about optimistic concurrency is most accurate. Competing choices sound plausible, but they miss the key condition.
Q72. How is optimistic concurrency best characterized?
Select an answer to check.
Answer: Detect conflicting updates via row-version.
In this case, Detect conflicting updates via row-version. is correct. Throws DbUpdateConcurrencyException. This is the most accurate statement for how is optimistic concurrency best characterized. Competing choices sound plausible, but they miss the key condition.
Q73. Which option best describes transactions in C#/.NET?
Select an answer to check.
Answer: Group multiple changes atomically.
The best option here is Group multiple changes atomically.. Use BeginTransaction or scope. This is the most accurate statement for which option best describes transactions in c#/.net. Competing choices sound plausible, but they miss the key condition.
Q74. What is the primary purpose of transactions?
Select an answer to check.
Answer: Group multiple changes atomically.
For this question, Group multiple changes atomically. is correct. Use BeginTransaction or scope. This is the most accurate statement for what is the primary purpose of transactions. Competing choices sound plausible, but they miss the key condition.
Q75. Which statement about transactions is most accurate?
Select an answer to check.
Answer: Group multiple changes atomically.
Group multiple changes atomically. is the correct answer here. Use BeginTransaction or scope. This is the most accurate statement for which statement about transactions is most accurate. Competing choices sound plausible, but they miss the key condition.
Q76. How is transactions best characterized?
Select an answer to check.
Answer: Group multiple changes atomically.
Here, Group multiple changes atomically. is the right choice. Use BeginTransaction or scope. It aligns directly with what the question asks about how is transactions best characterized. The remaining choices fail because they don’t satisfy the full definition.
Q77. Which option best describes connection resiliency in C#/.NET?
Select an answer to check.
Answer: Retry transient failures automatically.
In this case, Retry transient failures automatically. is correct. EnableRetryOnFailure(). It aligns directly with what the question asks about which option best describes connection resiliency in c#/.net. The remaining choices fail because they don’t satisfy the full definition.
Q78. What is the primary purpose of connection resiliency?
Select an answer to check.
Answer: Retry transient failures automatically.
The best option here is Retry transient failures automatically.. EnableRetryOnFailure(). It aligns directly with what the question asks about what is the primary purpose of connection resiliency. The remaining choices fail because they don’t satisfy the full definition.
Q79. Which statement about connection resiliency is most accurate?
Select an answer to check.
Answer: Retry transient failures automatically.
For this question, Retry transient failures automatically. is correct. EnableRetryOnFailure(). It aligns directly with what the question asks about which statement about connection resiliency is most accurate. The remaining choices fail because they don’t satisfy the full definition.
Q80. How is connection resiliency best characterized?
Select an answer to check.
Answer: Retry transient failures automatically.
Retry transient failures automatically. is the correct answer here. EnableRetryOnFailure(). It aligns directly with what the question asks about how is connection resiliency best characterized. The remaining choices fail because they don’t satisfy the full definition.
Q81. Which option best describes query splitting in C#/.NET?
Select an answer to check.
Answer: Split complex queries to avoid Cartesian explosion.
Here, Split complex queries to avoid Cartesian explosion. is the right choice. AsSplitQuery. This matches the core idea being tested around which option best describes query splitting in c#/.net. The remaining choices fail because they don’t satisfy the full definition.
Q82. What is the primary purpose of query splitting?
Select an answer to check.
Answer: Split complex queries to avoid Cartesian explosion.
In this case, Split complex queries to avoid Cartesian explosion. is correct. AsSplitQuery. This matches the core idea being tested around what is the primary purpose of query splitting. The remaining choices fail because they don’t satisfy the full definition.
Q83. Which statement about query splitting is most accurate?
Select an answer to check.
Answer: Split complex queries to avoid Cartesian explosion.
The best option here is Split complex queries to avoid Cartesian explosion.. AsSplitQuery. This matches the core idea being tested around which statement about query splitting is most accurate. The remaining choices fail because they don’t satisfy the full definition.
Q84. How is query splitting best characterized?
Select an answer to check.
Answer: Split complex queries to avoid Cartesian explosion.
For this question, Split complex queries to avoid Cartesian explosion. is correct. AsSplitQuery. This matches the core idea being tested around how is query splitting best characterized. The remaining choices fail because they don’t satisfy the full definition.
Q85. Which option best describes compiled queries in C#/.NET?
Select an answer to check.
Answer: Cache parsed/translated queries for reuse.
Cache parsed/translated queries for reuse. is the correct answer here. Speeds hot paths. This matches the core idea being tested around which option best describes compiled queries in c#/.net. The remaining choices fail because they don’t satisfy the full definition.
Q86. What is the primary purpose of compiled queries?
Select an answer to check.
Answer: Cache parsed/translated queries for reuse.
Here, Cache parsed/translated queries for reuse. is the right choice. Speeds hot paths. That is exactly the concept behind what is the primary purpose of compiled queries in this context. The remaining choices fail because they don’t satisfy the full definition.
Q87. Which statement about compiled queries is most accurate?
Select an answer to check.
Answer: Cache parsed/translated queries for reuse.
In this case, Cache parsed/translated queries for reuse. is correct. Speeds hot paths. That is exactly the concept behind which statement about compiled queries is most accurate in this context. The remaining choices fail because they don’t satisfy the full definition.
Q88. How is compiled queries best characterized?
Select an answer to check.
Answer: Cache parsed/translated queries for reuse.
The best option here is Cache parsed/translated queries for reuse.. Speeds hot paths. That is exactly the concept behind how is compiled queries best characterized in this context. The remaining choices fail because they don’t satisfy the full definition.
Q89. Which option best describes global query filters in C#/.NET?
Select an answer to check.
Answer: Predicates applied to all queries on entity.
For this question, Predicates applied to all queries on entity. is correct. Soft delete, multi-tenant. That is exactly the concept behind which option best describes global query filters in in this context. The remaining choices fail because they don’t satisfy the full definition.
Q90. What is the primary purpose of global query filters?
Select an answer to check.
Answer: Predicates applied to all queries on entity.
Predicates applied to all queries on entity. is the correct answer here. Soft delete, multi-tenant. That is exactly the concept behind what is the primary purpose of global query in this context. The remaining choices fail because they don’t satisfy the full definition.
Q91. Which statement about global query filters is most accurate?
Select an answer to check.
Answer: Predicates applied to all queries on entity.
Here, Predicates applied to all queries on entity. is the right choice. Soft delete, multi-tenant. It fits the requirement in the prompt about which statement about global query filters is most. The remaining choices fail because they don’t satisfy the full definition.
Q92. How is global query filters best characterized?
Select an answer to check.
Answer: Predicates applied to all queries on entity.
In this case, Predicates applied to all queries on entity. is correct. Soft delete, multi-tenant. It fits the requirement in the prompt about how is global query filters best characterized. The remaining choices fail because they don’t satisfy the full definition.
Q93. Which option best describes seed data in C#/.NET?
Select an answer to check.
Answer: Initial data inserted via migrations.
The best option here is Initial data inserted via migrations.. HasData in OnModelCreating. It fits the requirement in the prompt about which option best describes seed data in c#/.net. The remaining choices fail because they don’t satisfy the full definition.
Q94. What is the primary purpose of seed data?
Select an answer to check.
Answer: Initial data inserted via migrations.
For this question, Initial data inserted via migrations. is correct. HasData in OnModelCreating. It fits the requirement in the prompt about what is the primary purpose of seed data. The remaining choices fail because they don’t satisfy the full definition.
Q95. Which statement about seed data is most accurate?
Select an answer to check.
Answer: Initial data inserted via migrations.
Initial data inserted via migrations. is the correct answer here. HasData in OnModelCreating. It fits the requirement in the prompt about which statement about seed data is most accurate. The remaining choices fail because they don’t satisfy the full definition.
Q96. How is seed data best characterized?
Select an answer to check.
Answer: Initial data inserted via migrations.
Here, Initial data inserted via migrations. is the right choice. HasData in OnModelCreating. This is the most accurate statement for how is seed data best characterized. The remaining choices fail because they don’t satisfy the full definition.
Q97. Which option best describes a value converter in C#/.NET?
Select an answer to check.
Answer: Converts CLR values to/from store types.
In this case, Converts CLR values to/from store types. is correct. Useful for enums, JSON, etc. This is the most accurate statement for which option best describes a value converter in. The remaining choices fail because they don’t satisfy the full definition.
Q98. What is the primary purpose of a value converter?
Select an answer to check.
Answer: Converts CLR values to/from store types.
The best option here is Converts CLR values to/from store types.. Useful for enums, JSON, etc. This is the most accurate statement for what is the primary purpose of a value. The remaining choices fail because they don’t satisfy the full definition.
Q99. Which statement about a value converter is most accurate?
Select an answer to check.
Answer: Converts CLR values to/from store types.
For this question, Converts CLR values to/from store types. is correct. Useful for enums, JSON, etc. This is the most accurate statement for which statement about a value converter is most. The remaining choices fail because they don’t satisfy the full definition.
Q100. How is a value converter best characterized?
Select an answer to check.
Answer: Converts CLR values to/from store types.
Converts CLR values to/from store types. is the correct answer here. Useful for enums, JSON, etc. This is the most accurate statement for how is a value converter best characterized. The remaining choices fail because they don’t satisfy the full definition.