Exam Dawn

Appearance

Part-A ​

  1. a) What is an HTML element? Give example. ​

    An HTML Element consists of a start tag, content, and an end tag, which together define the element’s structure and functionality. Elements are the basic building blocks of a webpage and can represent different types of content, such as text, links, images, or headings. [1]

    HTML
    <!DOCTYPE html>
<html>

<head>
    <title>Exam Dawn</title>
</head>

<body>
    <p>Hello World!</p>
</body>

</html>

    b) What do you mean by Boxing/Unboxing? ​

    • Boxing:
      • The process of converting a Value Type variable (char, int etc.) to a Reference Type variable (object).
      • Boxing is an implicit conversion process in which object type (super type) is used.
      • Reference type variables (which are essentially references) are stored on the stack, while the actual data they point to is stored on the heap.
    • Unboxing:
      • The process of converting a Reference Type variable into a Value Type variable is known as Unboxing.
      • It is an explicit conversion process. [1]

    c) List any four operators which cannot be overloaded. ​

    • Member Access Operator: Used to access members of a class or structure.
    • Type Casting Operator: Used for explicit type conversion.
    • Sizeof Operator: Used to obtain the size of a type in bytes.
    • Throw Operator: Used to throw exceptions. [1]

    d) What is the significance of component tray? ​

    The component tray is a rectangular region displayed at the bottom of the design view window while in design view mode, once it is active. The component tray becomes active in design view after a component that is displayed in the component tray has been added to or is part of the current document. The significance of the Component Tray:

    • Event Handling
    • Ease of Use
    • Visibility Control
    • Resource Management [1]

    e) Differentiate between TextBox and Label controls. ​

    FeatureTextBoxLabel
    PurposeUsed for user input; allows text entry.Used to display static text or information.
    User InteractionEditable by the user; can accept input.Non-editable; users cannot modify the text.
    Text PropertyCan be changed at runtime based on user input.Typically set at design time and remains constant.
    AppearanceCan have different styles (multiline, password, etc.).Simple text display; can be styled but not for input.
    EventsSupports events like TextChanged, KeyPress, etc.Supports events like Click, but not for text input.
    FocusCan receive focus and is part of the tab order.Cannot receive focus; not part of the tab order.
    Use CaseIdeal for forms where user input is required (e.g., entering names, passwords).Ideal for displaying labels, instructions, or titles without user interaction.

    f) Write the purpose of Dim and Redim keywords. ​

    • Dim: The Visual Basic compiler uses the Dim statement to determine the variable's data type and other information, such as what code can access the variable. The following example declares a variable to hold an Integer value. [1] EXAMPLE:
      VB
      Dim variable_name As Integer
    • ReDim: The ReDim statement is used to size or resize a dynamic array that has already been formally declared by using a Private, Public, or Dim statement with empty parentheses (without dimension subscripts). [1] EXAMPLE:
      VB
      ReDim X(10, 10, 10) 
. . . 
ReDim Preserve X(10, 10, 15)

    g) What is FormView control? List any two properties. ​

    The FormView control is used to display a single record at a time from a data source. When you use the FormView control, you create templates to display and edit data-bound values. The templates contain controls, binding expressions, and formatting that define the look and functionality of the form. The Two properties are:

    • Background
    • Class Reference

    h) What is Simple Binding? ​

    The ability of a control to bind to a single data element, such as a value in a column in a dataset table. This is the type of binding typical for controls such as a TextBox control or Label control, which are controls that typically only displays a single value. [1]

Part-B [Unit-1] ​

  1. a) Explain HTML table tags with example. ​

    b) Write the advantages and disadvantages of client side scripts. ​

  2. a) List any six String Class methods in C# with their purpose. ​

    b) Explain while and for-each loops in C# with syntax example. ​

Part-B [Unit-2] ​

  1. a) What is interface? Explain defining and implementing an interface with example. ​

    b) Explain binary operator overloading with example. ​

  2. a) Explain server explorer, solution explorer and toolbox components of VB IDE. ​

    b) Explain exception handling mechanism in C# with syntax and example. ​

Part-B [Unit-3] ​

  1. a) List and explain Visual Basic data types. ​

    b) Explain InputBox function. ​

    c) With example explain select case structure. ​

  2. a) List and explain any five properties of VB.NET Form. ​

    b) Explain multiline, wordwrap and Passwordchar properties of Textbox. ​

    c) Explain adding and removing the items to/from a ComboBox with example. ​

Part-B [Unit-4] ​

  1. a) Explain the different ways of navigating through the data sets. ​

    b) Explain the following classes with properties: ​

    1. SqlConnection class
    2. SqlCommand class
    3. SqlDataAdapter class

  2. a) Explain Range and Compare validation controls. ​

    b) List and explain any five properties of GridView web control. ​