C# Test 1

Question 2: Which of the followings are value types in C#?

• Int32
• Double
• Decimal
• All of the above

Question 3: Which of the following is a reference type in C#?

• String
• Long
• Boolean
• None of the above

Question 4: What is the nullable type in C#?

• It allows assignment of null to reference type.
• It allows assignment of null to value type.
• It allows assignment of null to static class.
• None of the above.

Question 5: Struct is a _____.

• Reference type
• Value type
• Class type
• String type

Question 6: 10 > 9 ? "10 is greater than 9" : "9 is greater than 10" is an example of _______

• Ternary operator
• Conditional operator
• Greater than operator
• Inverse operator

Question 7: Which of the following datatype can be used with enum?

• int
• string
• boolean
• All of the above

Question 8: What is an indexer?

• It allows an instance of a class to be indexed like an array
• It allows enumerator with class
• It creates index for instances of a class.
• None of the above.

Question 9: String is ______.

• Mutable
• Immutable
• Static
• Value type

Question 10: All arrays start with _____ index.

• 1
• 0
• -1
• 0.0

Question 11: Which of the following is the correct way of declaring an array in C#?

• int[] intArray = new int[];
• int intArray[] = new int[5];
• int[] intArray = new int[5];
• int[5] intArray = new int[];

Question 12: Which of the following is true for ReadOnly variables?

• Value will be assigned at runtime.
• Value will be assigned at compile time.
• Value will be assigned when it accessed first time
• None of the above

Question 13: Which of the following statements is true?

• try block must be followed by catch or finally block or both.
• finally block cannot include return statement.
• try block can include another try block.
• All of the above.

Question 14: Which of the following statements is true?

• A finally block may not execute every time
• A return or break statement cannot exit a finally block.
• A finally block can come before catch block.
• Multiple finally block is possible.

Question 15: Func and Action are the types of ______.

• Utility function
• Delegate
• Event
• Generic class

Question 16: Return type of Predicate<T>() is always a ______.

• int
• string
• boolean
• void

Question 17: The partial class allows ________

• Implementation of single class in multiple .cs files.
• Declaration of multiple classes in a single .cs file.
• Implementation of multiple interfaces to single class.
• Multiple class inheritance.

Question 18: LINQ stands for ________.

• Language Integrated Query
• Local Integration Query
• Language Included Query
• Lazy Integrated Query

Question 19: Data type of a variable declared using var will be assigned at _______.

• Runtime
• Compile time
• Any time
• Application Initialization time.

Question 20: Which of the following statements is true?

• The dynamic type allows multiple time declaration of a variable.
• The dynamic type allows compile time type checking
• The dynamic type escapes compile time type checking
• None of the above.