SUMMATIVE TEST 2.1 (CP1)

Which component of the .NET (Core/5+) platform is primarily responsible for managing the execution, memory, and security of compiled C# code, including Just-In-Time (JIT) compilation?

• The C# Compiler (CSC)

• The Base Class Library (BCL)

• The Common Language Runtime (CLR)

• The .NET Software Development Kit (SDK)

What is the fundamental difference in memory storage between C# value types (like int and bool) and reference types (like string and custom class objects)?

• Both value and reference types always store their actual data on the Heap.

• Value types store their data on the Heap, while reference types store their data on the Stack.

• Value types are immutable (cannot be changed), while reference types are mutable (can be changed).

• Value types store their data directly on the Stack, while reference types store a reference (a memory address) on the Stack, which points to the actual data stored on the Heap.

What is the primary purpose of a WinForms application?

• To create web-based applications that run in a browser.

• To manage server-side logic and databases for enterprise systems.

• To develop cross-platform mobile applications for iOS and Android.

• To build desktop applications with a graphical user interface for the Windows operating system.

Which of the following BEST defines a ComboBox control in a user interface?

• A control used exclusively for displaying images.

• A control designed to show the progress of a task.

• A control that allows users to input multiple lines of text.

• A space-saving control that combines a text box and a list box.

A LinkLabel control is BEST described as a control that:

• Allows users to browse and open local files.

• Is used to draw custom shapes and graphics.

• Acts as a clickable hyperlink while displaying text.

• Stores and displays data from a connected database.

What is the primary function of a CheckBox control in a user interface?

• To provide a drop-down list of choices.

• To display a link that opens a new webpage.

• To enable the user to select one or more independent options.

• To allow the user to select one option from a group of mutually exclusive choices.

Which of the following BEST describes a CheckedListBox control?

• A control used for selecting a single file from a directory.

• A control that combines a drop-down list with a text box.

• A control that displays a list of items where each item has a button next to it.

• A list control where each item can be independently checked or unchecked with an associated check box.

When updating an item in a ListBox control, what is the standard process?

• Using a built-in UpdateItem() method.

• Calling a Refresh() method on the ListBox control.

• Modifying the item directly by accessing its properties.

• Removing the old item and inserting the new item at the same index.

Which component is essential for enabling the platform-independent nature of C# by translating the compiled code, known as Intermediate Language (IL), into machine code that can be executed on a specific operating system and hardware?

• The Visual Studio IDE

• The C# Compiler (csc.exe)

• The Base Class Library (BCL)

• The Common Language Runtime (CLR)

What is the fundamental reason why C# code, after being compiled into Intermediate Language

     (IL), can run on various operating systems (like Windows, Linux, and macOS), and which

     specific component is necessary for this cross-platform execution?

• C# code is compiled directly into native machine code by the C# compiler (csc.exe), making the

          CLR unnecessary for execution.

• The CLR's Garbage Collector manages memory, which is the primary factor enabling the code

          to be portable across different hardware architectures.

• C# is interpreted directly from the source code by the operating system kernel, bypassing the

          need for an intermediate language or runtime environment.

• The IL is a machine-independent instruction set that is translated into the host machine's

          native code by the CLR's Just-In-Time (JIT) compiler, thereby ensuring portability and

          enforcing security.