SD_Prelim Exam

What are the different data types available in C#?

• c. int, float, double, char, string, bool, decimal

• The different data types available in C# are int, float, double, char, string, bool, etc.

• a. int, long, short, byte, float

• b. int, double, char, string, boolean

Explain the usage of if-else control structure in C# with an example.

• The usage of if-else control structure in C# is to perform arithmetic operations on two numbers.

• The usage of if-else control structure in C# is to check a condition and execute different code based on whether the condition is true or false.

• The usage of if-else control structure in C# is to define a function that can be called based on a condition.

• The usage of if-else control structure in C# is to repeat a block of code until a specified condition is met.

How are arrays different from collections in C#?

• Arrays are fixed in size and can only store elements of the same type, while collections can dynamically resize and store different types of elements.

• Arrays and collections are the same in C#

• Arrays can dynamically resize and store different types of elements

• Collections are fixed in size and can only store elements of the same type

What is the purpose of methods and functions in C#?

• To organize and encapsulate code for reusability, modularity, and maintainability.

• To slow down the execution of the program

• To make the code less organized and harder to maintain

• To make the code more confusing and difficult to understand

What is the difference between value types and reference types in C#?

• Value types and reference types are the same in C#.

• Value types store their data directly, while reference types store a reference to the data in memory.

• Value types store their data indirectly, while reference types store their data directly.

• Value types cannot be used in C#.

Discuss the usage of switch case control structure in C#.

• It is used to define a function in C#

• It is used to repeat a block of code based on a condition

• It is used to declare a variable in C#

• It is used to execute one block of code from multiple options based on the value of an expression.

What are the advantages of using collections over arrays in C#?

• Arrays are more flexible and provide dynamic resizing

• Collections provide more flexibility, dynamic resizing, and additional functionality compared to arrays.

• Arrays offer additional functionality compared to collections

• Collections have limited functionality and are not resizable

How can you define a custom exception in C#?

• By importing a pre-defined exception class

• By creating a new class that inherits from the Exception class.

• By using the try-catch block

• By declaring a new variable

Explain the concept of multi-dimensional arrays in C#.

• Multi-dimensional arrays in C# are arrays that have more than one dimension, allowing for the storage of data in a table-like structure.

• Multi-dimensional arrays in C# are arrays that can only be accessed using nested loops

• Multi-dimensional arrays in C# are arrays that have unlimited dimensions

• Multi-dimensional arrays in C# are arrays that can only store integers

What is the role of the try-catch-finally block in exception handling in C#?

• It is used for loop iteration in C#.

• It is used for input validation in C#.

• It is used for file handling in C#.

• It is used for exception handling in C#.