Saturday, March 14, 2026

Question 1

A company FutureTech Pvt. Ltd. has four departments in its office building:

Administration
Finance
Marketing
Development

Distances between departments:

Connection	Distance
Administration – Finance	45 m
Administration – Marketing	60 m
Administration – Development	75 m
Finance – Marketing	35 m
Finance – Development	50 m
Marketing – Development	40 m

The company also has a branch office in Chennai, located 1200 km away.

Questions

a) Suggest the most suitable department to install the network switch.

Answer: Finance Department

Reason:
Finance department has comparatively shorter distances with other departments (45 m, 35 m, 50 m).
Installing the switch at a central location reduces cable usage and improves network efficiency.

b) Which transmission media should be used for connecting departments within the building?

Answer: Twisted Pair Cable

Reason:
Twisted pair cables are widely used for LAN connections inside buildings because they are cheap, easy to install, and suitable for short distances.

c) Identify the network type formed between the main office and the Chennai branch.

Answer: WAN (Wide Area Network)

Reason:
WAN connects networks across cities, states, or countries. Since the distance is 1200 km, it forms a WAN.

d) Name the device used to connect these networks.

Answer: Router

Reason:
Routers connect different networks and control the flow of data packets between them.

Question 2

A university has the following departments:

Library
Computer Lab
Administration
Examination Cell

Distances between departments:

Connection	Distance
Library – Computer Lab	25 m
Library – Administration	35 m
Library – Examination	50 m
Computer Lab – Administration	30 m
Computer Lab – Examination	40 m
Administration – Examination	20 m

The university wants to connect its campus with another campus 450 km away.

Questions

a) Suggest the best place to install the network switch.

Answer: Administration Department

Reason:
Administration has relatively shorter and balanced distances (35 m, 30 m, 20 m) with other departments, making it the central point of the network.

b) Which cable will be suitable for interconnecting the departments?

Answer: Ethernet (Twisted Pair) Cable

Reason:
Ethernet cables support high-speed data transmission within LAN networks inside buildings.

c) What type of network will connect the two campuses?

Answer: WAN

Reason:
A connection covering large geographical areas such as cities or states is categorized as WAN.

d) Which device connects a LAN to the internet?

Answer: Router

Reason:
Routers act as gateways between internal networks and external networks such as the internet.

Question 3

A hospital has four departments:

Emergency
Pharmacy
Laboratory
Billing

Distances between departments:

Connection	Distance
Emergency – Pharmacy	20 m
Emergency – Laboratory	45 m
Emergency – Billing	30 m
Pharmacy – Laboratory	35 m
Pharmacy – Billing	25 m
Laboratory – Billing	40 m

The hospital wants to connect its network with another hospital 700 km away.

Questions

a) Suggest the best department to place the network switch.

Answer: Pharmacy

Reason:
Pharmacy department has shorter average distances (20 m, 35 m, 25 m) with other departments, which makes it the optimal central location.

b) Which network topology is commonly used with switches in such networks?

Answer: Star Topology

Reason:
In star topology, all devices connect to a central switch, making the network easy to manage and troubleshoot.

c) What type of network will connect the two hospitals?

Answer: WAN

Reason:
Networks spanning large distances across cities form a Wide Area Network.

d) Which device controls the data path between networks?

Answer: Router

Reason:
Routers analyze destination addresses and forward data packets through the best path.

Question 4

A publishing company has four departments:

Content Writing
Editing
Designing
Printing

Distances between departments:

Connection	Distance
Content – Editing	30 m
Content – Designing	55 m
Content – Printing	70 m
Editing – Designing	25 m
Editing – Printing	45 m
Designing – Printing	35 m

The company also has another office 1000 km away.

Questions

a) Which department is the most suitable for installing the switch?

Answer: Editing Department

Reason:
Editing has shorter and balanced distances (30 m, 25 m, 45 m) compared to others, making it the central connection point.

b) Which cable is most appropriate for connecting devices inside the office?

Answer: Twisted Pair Cable

Reason:
It is cost-effective and commonly used in LAN environments.

c) What type of network connects the two offices?

Answer: WAN

Reason:
The connection spans long distances between cities, so it is classified as a WAN.

d) Which device directs data packets between networks?

Answer: Router

Reason:
Routers determine the best path for data transmission between multiple networks.

Question 5

A bank has four sections:

Customer Service
Accounts
Loan Department
IT Department

Distances between sections:

Connection	Distance
Customer Service – Accounts	25 m
Customer Service – Loan	40 m
Customer Service – IT	60 m
Accounts – Loan	30 m
Accounts – IT	45 m
Loan – IT	35 m

The bank has another branch 1500 km away.

Questions

a) Which department is the best location to install the switch?

Answer: Accounts Department

Reason:
Accounts department has balanced distances to all other sections, making it the most efficient central point.

b) Which cable will be used for internal networking?

Answer: Ethernet / Twisted Pair Cable

Reason:
Twisted pair cables are standard LAN cables used for short-distance networking.

c) What type of network will connect the two bank branches?

Answer: WAN

Reason:
Networks connecting different cities over long distances are classified as WAN.

d) Which networking device connects these networks?

Answer: Router

Reason:
Routers connect different LAN networks and allow communication between distant locations.

Note: “Practice these 5 questions thoroughly—I’m confident you can score full marks in them!” 💪📚

Thank You!!!

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Friday, March 13, 2026

Class 12 Informatics Practices 2026: 60 Most Important Questions with Answers for CBSE Board Exam

The Informatics Practices (065) subject is an important part of the Class 12 curriculum under the Central Board of Secondary Education (CBSE). Every year many students look for important questions that can help them score good marks in the board examination.

To help students prepare effectively for the CBSE Board Exam 2026, we have compiled 100 most important questions with answers based on the latest CBSE syllabus, previous year questions and sample paper trends.

These questions cover all the major topics of Informatics Practices such as:

Python Pandas and DataFrame operations
CSV file handling
SQL queries and database concepts
Internet, digital society and data privacy

Students can use these questions for revision, practice and last-minute preparation before the board examination.

📘 Informatics Practices 2026

60 Most Important Questions with Answers

PART 1 – MCQ (1–25)

Which library is used in Python for data analysis?
Answer: Pandas
What is a DataFrame in Pandas?
Answer: A two-dimensional tabular data structure consisting of rows and columns.
Which function displays the first five rows of a DataFrame?
Answer: head()
Which function displays the last rows of a DataFrame?
Answer: tail()
Which function gives a statistical summary of the data?
Answer: describe()
What is the full form of CSV?
Answer: Comma Separated Values
Which command is used to import Pandas?
Answer: import pandas as pd
What is the full form of SQL?
Answer: Structured Query Language
Which SQL command is used to retrieve data from a table?
Answer: SELECT
Which clause is used to filter records in SQL?
Answer: WHERE
Which clause is used to sort records in SQL?
Answer: ORDER BY
Which clause is used to group records in SQL?
Answer: GROUP BY
Which function counts the number of records in SQL?
Answer: COUNT()
Which function calculates the average value in SQL?
Answer: AVG()
Which function finds the maximum value in SQL?
Answer: MAX()
Which function finds the minimum value in SQL?
Answer: MIN()
Which symbol is used for lists in Python?
Answer: [ ]
Which symbol is used for dictionaries in Python?
Answer: { }
Which key uniquely identifies a record in a table?
Answer: Primary Key
Which key creates a relationship between two tables?
Answer: Foreign Key
What is the trace of personal data left on the internet called?
Answer: Digital Footprint
Give one example of data security.
Answer: Password protection
What is illegal copying of digital content called?
Answer: Piracy
What is identity theft?
Answer: Using someone else's personal information without permission.
Give one example of cybercrime.
Answer: Hacking

PART 2 – Very Short Answer Questions (26–50)

What is Pandas?
Answer: Pandas is a Python library used for data analysis and data manipulation.
What is a Series in Pandas?
Answer: A one-dimensional labeled array.
What is a DataFrame?
Answer: A two-dimensional data structure with rows and columns.
What is a CSV file?
Answer: A text file in which values are separated by commas.
What is SQL?
Answer: A language used to manage and manipulate data in a database.
What is a Primary Key?
Answer: A field that uniquely identifies each record in a table.
What is a Foreign Key?
Answer: A field used to link two tables.
What is a database?
Answer: An organized collection of data.
What is the Internet?
Answer: A global network connecting millions of computers.
What is the World Wide Web?
Answer: A collection of websites accessed through the Internet.
What is a digital footprint?
Answer: The record of a user's online activities.
What is data privacy?
Answer: Protection of personal data from unauthorized access.
What is cybercrime?
Answer: Crime committed using computers or the internet.
What is hacking?
Answer: Unauthorized access to a computer system.
What is phishing?
Answer: A method of stealing personal information using fake emails or websites.
What is malware?
Answer: Malicious software designed to damage systems.
What is a firewall?
Answer: A security system that monitors and controls network traffic.
What is cloud computing?
Answer: Storing and accessing data over the internet instead of a local computer.
What is e-commerce?
Answer: Buying and selling goods online.
What is e-governance?
Answer: Government services delivered through the internet.
What are Intellectual Property Rights (IPR)?
Answer: Legal rights that protect creations of the mind.
What is plagiarism?
Answer: Copying someone else's work without giving credit.
What is the digital divide?
Answer: The gap between people who have access to technology and those who do not.
What is data ethics?
Answer: Ethical guidelines for using data responsibly.
What is social media?
Answer: Online platforms used for communication and sharing information.

PART 3 – Short Answer Questions (51–60)

Write a Python code to create a DataFrame.


import pandas as pd

data = {"Name": ["Aman", "Riya"], "Marks": [85, 90]}
df = pd.DataFrame(data)

print(df)

Write a Pandas code to read a CSV file.


import pandas as pd

df = pd.read_csv("data.csv")
print(df)

Write a Pandas code to save data to a CSV file.


df.to_csv("data.csv")

Write an SQL query to display all records from a Student table.


SELECT * FROM Student;

Write an SQL query to display students with marks greater than 80.


SELECT * FROM Student
WHERE Marks > 80;

Write an SQL query to sort students by marks in ascending order.


SELECT * FROM Student
ORDER BY Marks;

Write an SQL query to sort students by marks in descending order.


SELECT * FROM Student
ORDER BY Marks DESC;

Write an SQL query to calculate the average marks.


SELECT AVG(Marks)
FROM Student;

Write an SQL query to count the total number of students.


SELECT COUNT(*)
FROM Student;

Write an SQL query to find the highest marks.


SELECT MAX(Marks)
FROM Student;


Thank You!!!
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Sanjeev Study Hub – Class 11 & 12 Notes, Question Papers, IP & CS Study Material

Saturday, March 14, 2026

Top 5 Board-Level Networking Case Study Questions for CBSE Class 12 IP 2026 with Answers & Explanations

Question 1

Questions

Question 2

Questions

Question 3

Questions

Question 4

Questions

Question 5

Questions

Friday, March 13, 2026

Class 12 Informatics Practices 2026: 60 Most Important Questions with Answers for CBSE Board Exam

📘 Informatics Practices 2026

60 Most Important Questions with Answers

PART 1 – MCQ (1–25)

PART 2 – Very Short Answer Questions (26–50)

PART 3 – Short Answer Questions (51–60)

Top 5 Board-Level Networking Case Study Questions for CBSE Class 12 IP 2026 with Answers & Explanations

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