Delphi is an integrated development environment (IDE) and an object-oriented, rapid application development (RAD) programming language. It was originally developed by Borland Software Corporation in 1995 and is now maintained and distributed by Embarcadero Technologies. Delphi is designed to help developers create Windows applications quickly and efficiently, with a focus on ease of use and productivity.
Delphi is commonly used to develop a wide range of applications, including desktop software, business applications, scientific applications, database applications, games, and more. It provides developers with the tools and resources needed to create robust and feature-rich applications with relatively short development cycles. It is a powerful and versatile development environment and language that empowers developers to create native Windows applications with an emphasis on rapid development, flexibility, and productivity. With its recent support for cross-platform development, Delphi has expanded its reach to other operating systems, making it an attractive choice for developers aiming to target multiple platforms with the same codebase.
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Table of content
- Part 1: 30 Delphi quiz questions & answers
- Part 2: Download Delphi questions & answers for free
- Part 3: Free online quiz platform – OnlineExamMaker
Part 1: 30 Delphi quiz questions & answers
1. Delphi is a programming language primarily used for developing:
a) Web applications
b) Mobile applications
c) Windows applications
d) Embedded systems
Answer: c) Windows applications
2. Delphi’s Integrated Development Environment (IDE) provides tools for:
a) Code editing, debugging, and testing
b) Web design and development
c) Data analysis and visualization
d) Networking and server management
Answer: a) Code editing, debugging, and testing
3. Which of the following is NOT a feature of Delphi’s Rapid Application Development (RAD) approach?
a) Drag-and-drop UI design
b) Cross-platform development
c) Visual component library (VCL)
d) Code reusability
Answer: b) Cross-platform development
4. The Visual Component Library (VCL) in Delphi consists of pre-built:
a) SQL queries
b) Graphics and multimedia components
c) User interface components
d) Networking libraries
Answer: c) User interface components
5. Delphi applications are event-driven, meaning they respond to:
a) User actions and system events
b) Background processes and threads
c) Database queries and updates
d) External API calls
Answer: a) User actions and system events
6. Which language is used as the scripting language for Delphi applications?
a) JavaScript
b) Pascal
c) Python
d) C#
Answer: b) Pascal
7. Delphi provides built-in support for connecting to various databases through:
a) Java Database Connectivity (JDBC)
b) Data Access Components (DAC)
c) ActiveX Data Objects (ADO)
d) Structured Query Language (SQL)
Answer: b) Data Access Components (DAC)
8. In Delphi, what is the purpose of a “TButton” component?
a) Displaying images
b) Handling user input
c) Creating database connections
d) Performing mathematical calculations
Answer: b) Handling user input
9. Which Delphi component is used to display a collection of data in tabular form?
a) TEdit
b) TPanel
c) TStringGrid
d) TListBox
Answer: c) TStringGrid
10. Which Delphi component is used to display images?
a) TImage
b) TLabel
c) TButton
d) TCheckBox
Answer: a) TImage
11. Delphi’s “Form Designer” allows developers to visually design:
a) Database tables
b) User interfaces
c) Network protocols
d) Data analysis algorithms
Answer: b) User interfaces
12. What is the file extension for Delphi source code files?
a) .pas
b) .exe
c) .delphi
d) .dfm
Answer: a) .pas
13. Delphi applications can be compiled into executable files with the extension:
a) .pas
b) .exe
c) .dfm
d) .dll
Answer: b) .exe
14. Which Delphi keyword is used to define a new class?
a) class
b) def
c) type
d) var
Answer: c) type
15. In Delphi, which data type is used to store text or strings?
a) Integer
b) Double
c) Char
d) String
Answer: d) String
Part 2: Download Delphi questions & answers for free
Download questions & answers for free
16. What does the “ShowMessage” function do in Delphi?
a) Displays a message box with a message
b) Prints a message to the console
c) Clears the message box content
d) Shows a tooltip with a message
Answer: a) Displays a message box with a message
17. Which Delphi keyword is used to define a new variable?
a) define
b) var
c) new
d) type
Answer: b) var
18. Which Delphi component is used to display a list of items that the user can select?
a) TEdit
b) TListBox
c) TButton
d) TCheckBox
Answer: b) TListBox
19. What is the purpose of the “try..except” block in Delphi?
a) To define a new exception class
b) To handle exceptions that may occur during code execution
c) To create a new object instance
d) To define a custom message dialog
Answer: b) To handle exceptions that may occur during code execution
20. In Delphi, which function is used to convert a string to an integer?
a) IntToStr
b) StrToInt
c) IntToFloat
d) FloatToStr
Answer: b) StrToInt
21. Delphi provides the “TADOConnection” component for connecting to:
a) Web services
b) Databases using ActiveX Data Objects (ADO)
c) Remote servers using TCP/IP
d) The Internet of Things (IoT) devices
Answer: b) Databases using ActiveX Data Objects (ADO)
22. Which Delphi component is used to display a date and time picker?
a) TDateTimePicker
b) TCalendar
c) TEdit
d) TButton
Answer: a) TDateTimePicker
23. What is the purpose of the “Free” method in Delphi?
a) To allocate memory for a new object
b) To deallocate memory for an object
c) To create a new object instance
d) To initialize a new object
Answer: b) To deallocate memory for an object
24. Delphi’s “Canvas” property allows developers to perform:
a) Database queries
b) File I/O operations
c) Graphics drawing and manipulation
d) Network communication
Answer: c) Graphics drawing and manipulation
25. Which Delphi component is used to display a message to the user?
a) TPanel
b) TProgressBar
c) TLabel
d) TCheckBox
Answer: c) TLabel
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26. What is the purpose of the “TTimer” component in Delphi?
a) To measure the execution time of code
b) To schedule and execute tasks at specified intervals
c) To display a progress bar
d) To handle user input
Answer: b) To schedule and execute tasks at specified intervals
27. In Delphi, which event is triggered when the user clicks on a button?
a) OnClick
b) OnChange
c) OnEnter
d) OnExit
Answer: a) OnClick
28. Delphi’s “Data Module” is used to:
a) Store application data in a centralized location
b) Define new data types for the application
c) Create custom user interface components
d) Handle file I/O operations
Answer: a) Store application data in a centralized location
29. Which Delphi component is used to display progress during a lengthy operation?
a) TPanel
b) TProgressBar
c) TLabel
d) TCheckBox
Answer: b) TProgressBar
30. What is the purpose of the “Random” function in Delphi?
a) To generate random numbers
b) To sort an array in random order
c) To generate prime numbers
d) To round a floating-point number
Answer: a) To generate random numbers
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