(OLD Question)NEB GRADE XII 2081 ( 2024 ) Computer Science Queston


 



Comments

Post a Comment

Popular posts from this blog

Chapter : 1 DBMS Handwritten Notes

Image
SYLLABUS: 1.1 Introduction to data, database, Database system, DBMS 1.2 Field, Record, Objects, Primary Key, Alternate key, Candidate key 1.3 Advantages of using DBMS 1.4 DDL (Data Definition Language) and DML (Data Manipulation Language) 1.5 Database Model: Network Model, Hierarchical Model, Relational database model 1.6 Concept of Normalization: 1NF, 2NF, 3NF 1.7 Centralized Vs. Distributed Database 1.8 Database Security Advantages of a DBMS over a flat-file system: Data integrity:  A database system enforces data constraints and relationships, ensuring that the data is accurate and consistent. Data independence:  A database system allows for changes to be made to the structure of the data without affecting the applications that use the data. Concurrent access:  A database system allows multiple users to access the same data simultaneously, without interfering with each other. Data security:  A database system provides various security mechanisms to control access ...
Read more

Chapter : 4 Programming in C

Image
Rules for Naming a Variable in C: Can only contain letters (A-Z, a-z), digits (0-9), and underscores (_). ✅ student_age , num1 , total_marks ❌ student-age (hyphen not allowed) Must begin with a letter or an underscore (_), but not a digit. ✅ _temp , data1 ❌ 1number (cannot start with a digit) Cannot be a C keyword (reserved word). ❌ int , float , return (invalid because they are reserved words) Case-sensitive (uppercase and lowercase are different). Total , total , and TOTAL are three different variables. Should not contain spaces. ✅ studentMarks ❌ student marks (space is not allowed) 4.2 Functions 4.2.1 Concept of library and user defined functions and advantages Function:  A function in C is a self-contained block of statements that performs a specific task, and it can be called from another part of the program whenever needed.  It helps in modular programming, code reusability, and easy debugging . Functions are very im...
Read more

2. Data Communication and Networking [Most Important Questions and Solutions]

Image
IMPORTANT OLD QUESTION OF  Data Communication and Networking 2081 GIE Set A Q.No. 15 a) Why do network designers prefer to use switches in a LAN network? Explain briefly with any three suitable reasons. Ans: A switch is a device that connects multiple devices on a local network. It uses MAC addresses to forward data packets to the correct device on the network. Network designers prefer to use switches in a LAN (Local Area Network) because they improve performance, efficiency, and security. Here are three key reasons: 1. Faster Data Transmission (Better Performance): Ø   Switches use MAC addresses to forward data directly to the intended device instead of broadcasting to all devices (as hubs do). Ø   This reduces network congestion and improves speed in high-traffic environments. 2. Enhanced Security: Ø   Switches allow network segmentation using VLANs (Virtual LANs), preventing unauthorized access between departments. Ø   Unlike hubs, which br...
Read more