DATA MINING THEORY AND ALGORITHM USING PYTHON

Data mining is the process of discovering hidden, valid, and actionable patterns and knowledge from massive sets of data.

The Knowledge Discovery Process Steps

According to the diagram, the complete process flows through the following stages:

• Databases and Flat Files: The raw source data stored in various formats.
• Cleaning and Integration: Removing noise, handling missing data, and combining multiple data sources.
• Data Warehouse: The centralized repository where clean, integrated data is stored.
• Selection and Transformation: Choosing relevant data for the analysis task and transforming it into useful formats.
• Data Mining: The core step where intelligent, algorithmic methods are applied to extract data patterns.
• Evaluation and Presentation: Interpreting the discovered patterns and presenting them visually (e.g., charts or reports) to the user.
• Knowledge: The final usable insight gained from the entire process.

Image Processing using Python OpenCV

CHAPTER 2 QUIZ CLASS VI

Chapter 2: File Management & Organisation of Data

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Section A: Multiple Choice Questions (20 Marks)

1. What is a collection of related information stored on a storage device called?

• A) Folder
• B) File
• C) Drive
• D) Shortcut

2. Which object acts like a cabinet where you can keep related files and other folders?

• A) Drive
• B) Extension
• C) Folder
• D) Desktop

3. What is a storage area on the computer where all your files and folders are saved?

• A) File
• B) Folder
• C) Wildcard
• D) Drive

4. Moving a file/folder means:

• A) Shifting it from its original location to another
• B) Creating a duplicate copy of it
• C) Deleting it permanently
• D) Changing its file extension

5. Copying a file/folder means:

• A) Removing it from the original location
• B) Creating a duplicate copy of the selected item
• C) Organizing it alphabetically
• D) Renaming the file

6. Which keyboard shortcut is used to copy a file or folder?

• A) Ctrl + X
• B) Ctrl + V
• C) Ctrl + C
• D) Ctrl + Z

7. Which keyboard shortcut is used to cut (move) a file or folder?

• A) Ctrl + C
• B) Ctrl + X
• C) Ctrl + V
• D) Ctrl + N

8. Which shortcut combination is used to paste the cut or copied file/folder?

• A) Ctrl + P
• B) Ctrl + S
• C) Ctrl + C
• D) Ctrl + V

9. If you don't find "This PC" on your desktop, which Settings page helps you bring it back?

• A) Personalization -> Themes -> Desktop icon settings
• B) Ease of Access -> High Contrast
• C) Apps -> Default Apps
• D) System -> Notifications

10. To select multiple non-consecutive files and folders, you must press and hold down which key?

• A) Shift key
• B) Alt key
• C) Ctrl key
• D) Spacebar

11. Which sorting option arranges files based on their size (from biggest to smallest or vice-versa)?

• A) Name
• B) Date
• C) Size
• D) Type

12. Which of these are wildcard characters used for searching in Windows?

• A) @ and #
• B) * and ?
• C) & and %
• D) $ and _

13. The asterisk (*) wildcard character is used to replace:

• A) Exactly one character only
• B) A string of text or any number of characters
• C) Numbers only
• D) File extensions only

14. What will searching "L*.docx" fetch?

• A) All Word files starting with 'L' followed by any number of characters
• B) Exactly one Word file named 'L'
• C) Any file starting with 'L' irrespective of extension
• D) All text files ending with 'L'

15. What is the question mark (?) wildcard used to represent?

• A) A group of multiple characters
• B) Any single character
• C) Symbols only
• D) Hidden files

16. Which extension represents a Spreadsheet file created in Excel?

• A) .docx
• B) .pptx
• C) .xls or .xlsx
• D) .mp3

17. Which of the following is a valid image file extension?

• A) .mp3
• B) .jpeg
• C) .wav
• D) .docx

18. What feature of Windows allowing windows layout mapping splits active apps side-by-side?

• A) Multi-Sort
• B) Wildcard Search
• C) Snap Assist
• D) Desktop Switcher

19. To permanently delete files/folders without sending them to the Recycle Bin, press:

• A) Shift + Delete
• B) Ctrl + Delete
• C) Alt + Delete
• D) Backspace

20. What shortcut key opens the Settings window directly in Windows?

• A) Windows + D
• B) Windows + I
• C) Windows + R
• D) Windows + E

Section B: Assertion-Reason Questions (5 Marks)

Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Choose the correct option code:
A) Both (A) and (R) are true and (R) is the correct explanation of (A).
B) Both (A) and (R) are true but (R) is not the correct explanation of (A).
C) (A) is true but (R) is false.
D) (A) is false but (R) is true.

21.
Assertion (A): When you move a file from one drive to another, a copy is kept in the source drive.
Reason (R): Moving a file is also known as shifting a file which removes it from the source location.

• A) Both (A) and (R) are true and (R) is the correct explanation.
• B) Both (A) and (R) are true but (R) is NOT the correct explanation.
• C) (A) is true but (R) is false.
• D) (A) is false but (R) is true.

22.
Assertion (A): To select multiple files that are located continuously, you can press and hold the Shift key.
Reason (R): The Ctrl key is used for selecting non-consecutive files.

• A) Both (A) and (R) are true and (R) is the correct explanation.
• B) Both (A) and (R) are true but (R) is NOT the correct explanation.
• C) (A) is true but (R) is false.
• D) (A) is false but (R) is true.

23.
Assertion (A): If we search for 'Kips?.docx' in the Search box, it will match 'Kips12.docx'.
Reason (R): The question mark (?) wildcard replaces exactly one character in a search criteria.

• A) Both (A) and (R) are true and (R) is the correct explanation.
• B) Both (A) and (R) are true but (R) is NOT the correct explanation.
• C) (A) is true but (R) is false.
• D) (A) is false but (R) is true.

24.
Assertion (A): File extensions help the computer identify what application must be used to open a file.
Reason (R): Every file extension must be composed of exactly seven letters.

• A) Both (A) and (R) are true and (R) is the correct explanation.
• B) Both (A) and (R) are true but (R) is NOT the correct explanation.
• C) (A) is true but (R) is false.
• D) (A) is false but (R) is true.

25.
Assertion (A): Snap Assist is useful when taking notes in Word while attending an online lecture on a browser.
Reason (R): Snap Assist splits the screen so that both windows can be viewed side-by-side simultaneously.

• A) Both (A) and (R) are true and (R) is the correct explanation.
• B) Both (A) and (R) are true but (R) is NOT the correct explanation.
• C) (A) is true but (R) is false.
• D) (A) is false but (R) is true.

QUIZ CHAPTER 1 CLASS VI

Chapter 1: Types of Computers and Languages

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Section A: Multiple Choice Questions (20 Marks)

1. Which generation of computers used Vacuum Tubes as their primary internal circuitry technology?

• A) Second Generation
• B) First Generation
• C) Third Generation
• D) Fourth Generation

2. Transistors replaced vacuum tubes in which generation of computers, making them faster and smaller?

• A) First Generation
• B) Third Generation
• C) Second Generation
• D) Fifth Generation

3. Third-generation computers introduced integrated circuits (ICs). ICs are tiny chips composed of:

• A) Vacuum tubes and valves
• B) Transistors, resistors, and capacitors
• C) Microchips and AI modules
• D) Magnetic drums

4. Laptops and modern desktop computers belong primarily to which generation?

• A) Second Generation
• B) Third Generation
• C) Fourth Generation
• D) Fifth Generation

5. Which generation of computers is designed to simulate human intelligence and learn from data using AI?

• A) Fourth Generation
• B) Fifth Generation
• C) Third Generation
• D) Sixth Generation

6. Computers that work with real-world continuous physical signals (like temperature, speed, and voltage) are:

• A) Digital Computers
• B) Hybrid Computers
• C) Analog Computers
• D) Mainframe Computers

7. Digital computers process operational datasets using which digits to compute and generate data?

• A) Decimal numbers (0 to 9)
• B) Binary digits (0s and 1s)
• C) Mnemonic symbols
• D) Alphanumeric characters

8. Which type of computer combines features of both analog and digital systems for fast, precise handling in hospitals or factories?

• A) Hybrid Computers
• B) Mainframe Computers
• C) Supercomputers
• D) Microcomputers

9. Computers designed to perform a wide range of everyday activities like drawing, typing, and web browsing are:

• A) Special-purpose computers
• B) General-purpose computers
• C) Embedded computers
• D) Mainframe computers

10. Automated Teller Machines (ATMs) and traffic lights are classic examples of which type of computers?

• A) General-purpose computers
• B) Special-purpose computers
• C) Supercomputers
• D) Analog computers

11. Microcomputers are also commonly known as:

• A) Personal Computers (PCs)
• B) Mainframes
• C) Translators
• D) Hybrid setups

12. A computer system built directly into another machine to control its specific functions (like a washing machine or microwave) is called an:

• A) Embedded computer
• B) Digital Computer
• C) Minicomputer
• D) Mainframe computer

13. Which class of large computers is designed to serve hundreds or thousands of simultaneous users for critical business applications in banks and airlines?

• A) Microcomputers
• B) Mainframe Computers
• C) Embedded systems
• D) Analog devices

14. What are the most powerful, extremely fast, and highly expensive computers used for space research and weather forecasting called?

• A) Minicomputers
• B) Microcomputers
• C) Supercomputers
• D) Digital desktops

15. What is the set of instructions that tells a computer what to do called?

• A) Translator
• B) Microchip
• C) Program
• D) Hardware

16. Which computer language is the ONLY language that a computer really and natively understands?

• A) Assembly Language
• B) High-level Language
• C) Machine Language
• D) 4GL

17. Assembly Language uses which unique system in place of binary 0s and 1s?

• A) English prose statements
• B) Mnemonic codes or symbols
• C) Natural AI tools
• D) Object structures

18. The program code written by a user in a high-level language is formally called the:

• A) Object code
• B) Source code
• C) Machine code
• D) Mnemonic code

19. Which translator utility converts assembly language programs directly into machine language?

• A) Compiler
• B) Interpreter
• C) Assembler
• D) Executive

20. What is the fundamental operational difference between an Interpreter and a Compiler?

• A) Interpreter translates line-by-line; Compiler translates the whole program at once.
• B) Interpreter is faster than a Compiler.
• C) Compiler does not point out execution bugs.
• D) Interpreter creates an permanent external object file.

Section B: Assertion-Reason Questions (5 Marks)

Directions: Read each assertion statement (A) and reason statement (R) carefully. Select your choices based on the following ruleset grid:
A) Both (A) and (R) are true and (R) is the correct explanation of (A).
B) Both (A) and (R) are true but (R) is NOT the correct explanation of (A).
C) (A) is true but (R) is false.
D) (A) is false but (R) is true.

21.
Assertion (A): First-generation computers overheated easily and required heavy cooling infrastructure.
Reason (R): First-generation computer engineering relied heavily on vacuum tubes, which generated immense heat.

• A
• B
• C
• D

22.
Assertion (A): A hybrid computer system can be used inside intensive care units (ICUs) to monitor vital signs.
Reason (R): Hybrid computers work exclusively with binary digits (0s and 1s) and cannot process analog electrical inputs.

• A
• B
• C
• D

23.
Assertion (A): High-level computer languages are easily understood by humans compared to machine language.
Reason (R): High-level language formats look more like standard English, using words and symbols.

• A
• B
• C
• D

24.
Assertion (A): Computers can execute a high-level language program code directly without any structural translation.
Reason (R): A special program called a language translator is required to convert source code into executable object code.

• A
• B
• C
• D

25.
Assertion (A): Compilers are generally preferred over interpreters by absolute coding beginners.
Reason (R): An interpreter reads and executes a program line by line, stopping immediately when an error is encountered.

• A
• B
• C
• D

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COMPUTER SCIENCE NEP SYLLABUS – WBSU SEMESTER 2

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Computer Science NEP Syllabus

📚 COMPUTER SCIENCE NEP SYLLABUS – WBSU SEMESTER 2

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