The HS Computer Science Question Paper 2025 is a crucial milestone for students pursuing the Science and Commerce streams under the Assam Higher Secondary Education Council (AHSEC). With the 2025 Computer Science exam now concluded, many students are eagerly looking for the answer key to evaluate their performance. This article provides insights into the availability of official and unofficial answer keys, expert solutions, and how students can use these resources effectively.
HS Computer Science Question Paper 2025
Answer any eight from the following:
(a) Who is OOP?
OOP stands for Object-Oriented Programming. It is a programming paradigm that uses objects and classes to structure software programs.
(b) What is an instance in OOP?
An instance in OOP refers to an object created from a class. It represents a specific implementation of a class with its own unique data values.
(c) What is Data Encapsulation?
Answer:
Data Encapsulation is the process of wrapping data and methods into a single unit (class) to protect it from external access. It is a core principle of OOP that enhances security and data hiding.
(d) What is Overloading?
Overloading is an OOP concept where multiple methods in the sam
(e) What is Destructor in OOP?
A Destructor in OOP is a special method in a class that is automatically invoked when an object is destroyed. It is used to free resources like memory.e class have the same name but different parameters. It improves code reusability and readability.
(f) What is a class member?
A class member refers to any variable or method that belongs to a class. It can be data members (variables) or member functions (methods) that define the behavior of objects created from the class.
(g) What is Relational Algebra?
Relational Algebra is a procedural query language used in database management systems (DBMS) to retrieve and manipulate data stored in relational databases. It consists of operations like Selection, Projection, Union, Intersection, and Join.
(h) What is an Array?
An Array is a data structure that stores multiple values of the same data type in a contiguous memory location. Elements in an array are accessed using an index.
(i) What is Memory Allocation?
Memory Allocation is the process of assigning memory to variables and data structures in a program during execution. It can be static (before runtime) or dynamic (during runtime).
(j) What does FIFO mean to you?
FIFO (First In, First Out) is a data structure principle where the first element added is the first one removed. It is commonly used in queues, buffering systems, and scheduling algorithms.
(k) What is a preprocessor directive?
A preprocessor directive is a command that is processed by the compiler before actual compilation begins. It starts with a # symbol and is used for tasks like including header files (#include), defining macros (#define), and conditional compilation (#ifdef).
(l) What is a Relational Database?
A Relational Database (RDB) is a type of database that stores data in tables (relations), where data is organized into rows and columns. It uses keys to establish relationships between tables and supports SQL (Structured Query Language) for data management.
(m) What is Topology?
Topology refers to the physical or logical arrangement of a network. It defines how computers, devices, and communication links are connected. Common network topologies include Bus, Star, Ring, Mesh, and Hybrid.
Answer Any Ten From the Following:
(a) Define Namespaces.
A namespace is a container that holds a set of identifiers such as variable names, functions, and classes to avoid naming conflicts. In C++, the namespace keyword is used to declare a namespace, for example, std is a standard namespace in C++.
(b) Define Sorting.
Sorting is the process of arranging elements in a specific order, usually ascending or descending. Common sorting algorithms include Bubble Sort, Selection Sort, Merge Sort, and Quick Sort.
(c) Define POSTFIX notation.
POSTFIX notation (Reverse Polish Notation) is a mathematical notation in which operators follow their operands, eliminating the need for parentheses.
Example:
- Infix:
(3 + 4) × 5 - Postfix:
3 4 + 5 ×
(d) State De Morgan’s Theorems.
De Morgan’s Theorems are two fundamental laws in Boolean algebra:
- First Theorem:
- Second Theorem:
(e) What is the use of Optical Fibre?
Optical Fibre is used for high-speed data transmission using light signals. It is widely used in:
- Internet and telecommunications for fast and long-distance communication.
- Medical applications, such as endoscopy.
- Defense and aerospace for secure data transmission.
(f) Describe Satellite Data Communication in Networking.
Satellite Data Communication is a type of wireless communication that uses satellites to transmit data over long distances. It is commonly used for:
- Global Internet connectivity (e.g., Starlink, VSAT).
- Broadcasting TV signals across countries.
- Navigation systems (GPS).
- Disaster management for emergency communication.
(g) What can a template in C++ do?
A template in C++ allows writing generic and reusable code for multiple data types without rewriting functions or classes.
- Function Templates: Define functions that work with different data types.
- Class Templates: Define generic classes that can handle different types.
(h) Define a Queue.
A Queue is a linear data structure that follows the FIFO (First In, First Out) principle, meaning elements are inserted from the rear and removed from the front.
- Operations:
enqueue()(insert),dequeue()(remove). - Types: Linear Queue, Circular Queue, Priority Queue.
(i) What is IOSTREAM?
IOSTREAM is a C++ header file (#include <iostream>) that provides input-output stream operations.
- cin → Input from the keyboard.
- cout → Output to the console.
- cerr & clog → Error handling.
(j) What is Wireless Communication?
Wireless Communication is the transmission of data without physical connections (wires/cables) using radio waves, infrared, or satellite signals.
- Examples: Wi-Fi, Bluetooth, Mobile Networks (4G, 5G), Satellite Communication.
(k) Describe Bandwidth.
Bandwidth refers to the maximum data transfer rate of a network or internet connection, usually measured in bits per second (bps), Mbps, or Gbps.
- Higher bandwidth → Faster data transmission.
- Types: Analog (Hertz) & Digital (bps).
(l) What is K-map simplification?
K-map (Karnaugh Map) simplification is a method used to simplify Boolean expressions by organizing truth table values into a grid format.
- It helps in minimizing logical expressions without using algebraic methods.
- Reduces the number of logic gates required in circuit design.
(m) What is the use of XML?
XML (Extensible Markup Language) is used for storing and transporting data in a structured format.
- It is platform-independent and human-readable.
- Used in web development, configuration files, and data exchange between applications.
(n) What is Boolean algebra?
Boolean Algebra is a branch of algebra that deals with binary variables (0 and 1) and logical operations like AND, OR, NOT.
- It is used in digital logic design and circuit simplifications.
- It follows rules such as De Morgan’s Theorems and Idempotent Laws.
(o) What is TCP/IP?
TCP/IP (Transmission Control Protocol/Internet Protocol) is the set of networking protocols used for internet communication.
- TCP: Ensures reliable data transmission.
- IP: Handles addressing and routing of packets.
