WB Class 11 Semester 1 Model Paper Data Science

WEST BENGAL
MODEL QUESTION
PAPER

Class 11 Class 12
Semester I, II Semester III, IV

CLASS -XI
MODEL QUESTION.
SUBJECT: DATA SCIENCE (DTSC)
SEMESTER:1
FULL MARKS: 35

Answer the following questions 35*1=35

1. The __________ is considered the brain of the computer, responsible for processing
instructions.
a) RAM
b) CPU
c) Hard Drive
d) GPU

2. ___________ is a type of computer designed to perform specific tasks, often found in
devices like washing machines and cars.
a) Desktop
b) Workstation
c) Smartphone
d) Embedded System

3. Match the following types of networks with their descriptions:

A Types of B Descriptions
Networks

1 LAN a Covers a large geographical area, such as a city or a state.

2 WAN b Covers a small geographical area, such as a building or campus.

3 MAN c Global network connecting millions of private, public, academic,
business, and government networks.

4 Internet d Connects networks in different cities or countries.

a) 1-a,2-b,3-c,4-d
b) 1-b,2-d,3-a,4-c
c) 1-d,2-b,3-c,4-a
d) 1-c,2-a,3-d,4-c

4. Rearrange the following steps to show the correct order of data flow in a computer system:
1. Processing by the CPU
2. Storage in memory
3. Input from a device
4. Output to a device
a) 1,2,3,4
b) 4,3,2,1
c) 3,1,2,4
d) 2,3,4,1

5. Which of the following statements correctly describe the relationship between a bit, a byte,
and a word?
a) A bit is 8 bytes, and a word is 16 bits.
b) A byte is 8 bits, and a word is typically 16 or 32 bits depending on the system
architecture.
c) A word is 8 bits, and a byte is 16 bits.
d) A bit is a combination of bytes, and a word is a single bit.

6. Assertion (A): In a binary number system, the base is 2.
Reason (R): Each digit in a binary number can only be a 0 or a 1.
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.

7. Assertion (A): The AND gate outputs true only when all its inputs are true.
Reason (R): The AND gate performs the multiplication operation on binary inputs.
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.

8. Which of the following best explains the role of an operating system in managing a
computer's hardware and software resources?
a) It primarily focuses on enhancing the graphical interface for users.
b) It ensures that software applications can interact with hardware seamlessly.
c) It is responsible for connecting the computer to the Internet.
d) It manages only the input and output devices.

9. Convert the hexadecimal number (1A3) H to its binary equivalent.
a) 0001 1010 0011
b) 1110 1011 1100

c) 1001 1010 0011
d) 0011 1101 1010

10. If the decimal number 255 is converted to binary, what is the result?
a) 1100 1111
b) 1111 1111
c) 1010 1010
d) 1111 0000

11. Fill in the Blanks: An interpreter __________ each line of code before executing it, while a
compiler __________ the entire program into machine code before execution.

a) compiles, translates
b) translates, compiles
c) executes, translates
d) debugs, executes

12. Which of the following programming languages is typically compiled rather than interpreted?
a) Python
b) JavaScript
c) C++
d) Ruby
13. Match the following types of programming paradigms with their characteristics:
A Paradigm B Characteristics

1 Procedural Programming a Focus on objects and data encapsulation

2 Object-Oriented Programming b Uses functions to perform operations

3 Machine Language c Binary code understood by the computer

4 High-Level Language d Closer to human language, easier to read and
write

a) 1-a,2-b,3-c,4-d
b) 1-b,2-a,3-c,4-d
c) 1-d,2-c,3-d,4-a
d) 1-c,2-d,3-a,4-b

14. Rearrange the following steps to describe the process of compiling and running a C
program:

1. The compiler generates machine code.
2. The user writes source code in a high-level language.
3. The machine code is executed by the computer.
4. The compiler translates the source code into machine code.
a) 2,4,1,3
b) 1,2,3,4
c) 4,3,2,1
d) 3,2,4,1

15. Match the following types of programming concepts with their descriptions:

A Concept B Description

1 Compiler a Translates and executes code line by line

2 Interpreter b Translates the entire code into machine language at
once

3 Object-Oriented c Organizes code around objects and data
Programming encapsulation

4 Procedural Programming d Organizes code around functions and procedures

a) 1-a,2-b,3-c,4-d
b) 1-b,2-c,3-d,4-a
c) 1-b,2-a,3-c,4-d
d) 1-c,2-d,3-d,4-a

16. Which of the following methods can be used to add an element to a set?

a) append()
b) insert()
c) add()
d) update()

17. Which of the following is the correct way to declare a dictionary in Python?
a) dict = {"apple", "banana", "cherry"}
b) dict = ["apple": "red", "banana": "yellow", "cherry": "red"]
c) dict = {"apple": "red", "banana": "yellow", "cherry": "red"}
d) dict = ("apple": "red", "banana": "yellow", "cherry": "red")

18. Which of the following is a mutable data type in Python?
a) List

b) Tuple
c) String
d) Integer

19. Match the following data types with their correct examples:
Data Type Example

A) Integer 1) 3.14

B) Float 2) "Hello"

C) String 3) 42

a) A-3, B-1, C-2
b) A-2, B-3, C-1
c) A-1, B-2, C-3
d) A-3, B-2, C-1

20. The method used to add an item to the end of a list is ______.
a) append()
b) insert()
c) add()
d) extend()

21. Which of the following is a non linear data structure?
a) Tree
b) Stack
c) Array
d) Queue

22. What is the main difference between linear and nonlinear data structures?
a) Linear data structures can store more data than nonlinear structures.
b) Linear data structures have elements arranged in a sequential manner, while nonlinear
structures have elements arranged in a hierarchical manner.
c) Linear data structures require more memory than nonlinear structures.
d) Nonlinear data structures are always faster than linear structures.

23. Which operation adds an element to the end of a queue?
a) enqueue()
b) dequeue()
c) push()
d) pop()

24. Match the following NumPy functions with their descriptions:
NumPy Function Description

A) arange() 1) Returns the number of dimensions

B) ndim() 2) Creates an array with evenly spaced
values

C) dtype() 3) Returns the data type of an array

a) A-2, B-1, C-3
b) A-1, B-2, C-3
c) A-3, B-1, C-2
d) A-2, B-3, C-1

25. Fill in the blank: In a stack, the ______ operation removes the top element.

a) push()
b) pop()
c) enqueue()
d) dequeue()

26. Which condition must be met for binary search to be applicable?

a) The list must be sorted.
b) The list must be unsorted.
c) The list must contain only unique elements.
d) The list must contain only integers.

27. Which of the following scenarios is linear search most suitable for?

a) A large, sorted list.
b) A small, unsorted list.
c) A large, unsorted list.
d) A large list where each element is a complex object.

28. During the bubble sort process, what happens after each complete pass through the list?
a) The smallest element moves to the beginning.
b) The largest element moves to the end.
c) The middle element moves to its correct position.
d) The elements are reversed.

29. What is the primary advantage of binary search over linear search?
a) It can handle unsorted data.
b) It is faster for large datasets if the data is sorted.
c) It requires less memory.
d) It is easier to implement.

30. Which of the following was the first general-purpose electronic digital computer, created in
the 1940s?
a) ENIAC
b) Mark I
c) UNIVAC
d) Colossus
31. What distinguishes machine learning from traditional programming?
a) Machine learning algorithms can solve any problem without human intervention.
b) Machine learning involves creating explicit rules to solve problems.
c) Machine learning algorithms learn from data and improve over time.
d) Machine learning relies solely on pre-written code and does not involve data.

32. What is the result of multiplying a matrix by the identity matrix?

a) A zero matrix
b) The original matrix
c) A transposed matrix
d) A diagonal matrix

33. If A is a 2x3 matrix and Bis a 3x2 matrix, what is the resulting dimension of A*B?
a) 2x2
b) 2x3
c) 3x2
d) 3x3

34. Which of the following is true about vectors in Euclidean space?
a) Vectors can only exist in two dimensions.
b) Vectors must always be unit vectors.
c) Vectors can have any number of dimensions.
d) Vectors cannot be represented in three dimensions.

35. In Euclidean space, what is the dot product of two orthogonal (perpendicular) vectors?

a) Zero
b) One
c) The sum of their magnitudes
d) The product of their magnitudes

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