a) Using single-letter variable names
b) Avoiding comments in the code
c) Consistent indentation
d) Concatenating strings in loops
Answer: c) Consistent indentation
2. What is the recommended method for preventing SQL injection in C# applications?
Answer: c) Consistent indentation
2. What is the recommended method for preventing SQL injection in C# applications?
a) Building SQL queries with concatenated strings
b) Using parameterized queries or an ORM
c) Disabling database access
d) Encrypting the entire database
Answer: b) Using parameterized queries or an ORM
3. Which C# method is more efficient when concatenating strings in a loop?
Answer: b) Using parameterized queries or an ORM
3. Which C# method is more efficient when concatenating strings in a loop?
a) Using StringBuilder
b) Using the + operator
c) Using String.Concat()
d) Using string.Format()
Answer: a) Using StringBuilder
4. Which C# feature allows you to filter, sort, and manipulate data in a concise and optimized way?
Answer: a) Using StringBuilder
4. Which C# feature allows you to filter, sort, and manipulate data in a concise and optimized way?
a) Loop statements
b) Object-Relational Mapping (ORM)
c) Enumerators
d) LINQ and Enumerable methods
Answer: d) LINQ and Enumerable methods
5. What is the purpose of input validation in C#?
Answer: d) LINQ and Enumerable methods
5. What is the purpose of input validation in C#?
a) To prevent the application from running
b) To ensure data integrity and security
c) To display error messages to users
d) To bypass security measures
Answer: b) To ensure data integrity and security
6. Which of the following is NOT a recommended practice for improving code readability in C#?
Answer: b) To ensure data integrity and security
6. Which of the following is NOT a recommended practice for improving code readability in C#?
a) Using meaningful variable names
b) Adding comments to explain complex logic
c) Consistent indentation
d) Using global variables extensively
Answer: d) Using global variables extensively
7. When should you use a regular loop (for, while) instead of LINQ in C#?
Answer: d) Using global variables extensively
7. When should you use a regular loop (for, while) instead of LINQ in C#?
a) Always use LINQ for better performance
b) When performing simple array operations
c) When dealing with collections of data
d) When writing SQL queries
Answer: b) When performing simple array operations
8. What is the benefit of using parameterized queries in C# for database access?
Answer: b) When performing simple array operations
8. What is the benefit of using parameterized queries in C# for database access?
a) Allows dynamic SQL query building
b) Provides improved database performance
c) Prevents SQL injection attacks
d) Supports direct database access without a connection string
Answer: c) Prevents SQL injection attacks
9. Which C# class should be used to efficiently build large strings that involve concatenation?
Answer: c) Prevents SQL injection attacks
9. Which C# class should be used to efficiently build large strings that involve concatenation?
a) String
b) StringBuilder
c) StringBuffer
d) StringConcatenator
Answer: b) StringBuilder
10. What is the primary purpose of using comments in C# code?
Answer: b) StringBuilder
10. What is the primary purpose of using comments in C# code?
a) To confuse other developers
b) To prevent others from understanding the code
c) To explain complex logic and algorithms
d) To increase compilation time
Answer: c) To explain complex logic and algorithms
Answer: c) To explain complex logic and algorithms