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Tuesday, June 16, 2026

Exploring Data Science-CLASS-8-CH-3(2026-27):

CBSE SOLUTIONS-2026-27 ,
Exploring Data Science-CLASS-8-CH-3(2026-27):


CBSE SOLUTIONS-2026-27
CLASS-8
CHAPTER-3 EXPLORING DATA SCIENCE

Section A: Multiple Choice Questions (MCQs)
1. A method used to classify the output into a finite number of classes:
(A) Database (B) Online shopping (C) Classification (D) None of these
Answer: (C) Classification
2. If the number of output classes is two, then the classification is:
(A) Datasets (B) Binary classification (C) Both A & B (D) None of these
Answer: (B) Binary classification
3. They are responsible for handling large amounts of structured and unstructured data:
(A) Scientists (B) Economists (C) Data engineers (D) Data scientists
Answer: (C) Data engineers
4. A type of machine learning based on rewards and punishments:
(A) Reinforcement learning (B) Clustering learning (C) Supervised machine learning (D) Unsupervised machine learning
Answer: (A) Reinforcement learning
5. It is a component of data science:
(A) Billing (B) Gaming (C) Machine learning (D) Social media
Answer: (C) Machine learning

Section B: 
B.Write TRUE or FALSE.
1. The available data may have noise or unused information.
Answer: TRUE
2. To understand data in a better manner, different visualisation techniques must be used.
Answer: TRUE
3. The first and most important component of data science is the availability of relevant data.
Answer: TRUE
4. Data transportation can help to make predictions about unforeseen or future data.
Answer: FALSE
5. A data mining engineer is an expert who uses data to provide insights.
Answer: TRUE

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MS Excel-2021 Advance Featurers-Class-7-Ch-3(2026-27):

CBSE SOLUTIONS-2026-27 ,
MS Excel-2021 Advance Featurers-Class-7-Ch-3(2026-27):


CBSE SOLUTIONS-2026-27
CLASS-7
CHAPTER-3 MS Excel 2021: Advance Features

A. Use your pencil and fill the correct circles:
1. Categories are organized along the horizontal axis and values along the vertical axis in a:
(A) Column chart (B) Pie chart (C) Line chart (D) Doughnut chart
Answer: (A) Column chart
2. Each section on a ring displays the contribution of an individual item to the total of all items in a particular series in:
(A) Bar charts (B) Pie charts (C) Doughnut charts (D) Scatter charts
Answer: (C) Doughnut charts
3. The bars, slices or other elements that represent the data:
(A) Data series (B) Plot area (C) Gridlines (D) Data tables
Answer: (A) Data series
4. You use it to restrict cell entries within a specified range:
(A) Filter feature (B) Values option (C) Sorting data option (D) Data validation
Answer: (D) Data validation

B. Write TRUE or FALSE:
1. Data validation is used to restrict the cell entries within a specified range.
Answer: TRUE
2. In doughnut chart, data series is represented by individual rings.
Answer: TRUE
3. Data can be sorted in rows on the basis of text and numbers or dates.
Answer: TRUE
4. A hierarchy chart plots data in concentric circles with each axis representing a different variable extending outward from a central point.
Answer: FALSE
5. Conditional Formatting is a feature in MS Excel that lets you apply formatting.
Answer: TRUE

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Sunday, May 17, 2026

ICT SKILLS-II-CLASS-10-U-3(2026-27):

CBSE SOLUTIONS-2026-27 ,
ICT SKILLS-II-CLASS-10-U-3(2026-27):


CBSE-SOLUTIONS
CLASS-10
PART-A
UNIT-III ICT SKILLS-II

A. Multiple Choice Questions
1. A ________ operating system is a computing environment that reacts to input within a specific period of time.
(a) Single User (b) Multi-User (c) Real Time (d) Distribute
Answer: (c) Real Time
2. Identify the measure to protect computer from threats and viruses.
(a) Sharing password with friends (b) Allow anyone to use your device
(c) Use Antivirus (d) Leave computer without logging out
Answer: (c) Use Antivirus
3. The cleaning of software installed in the computer cannot be achieved by ________.
(a) Disk cleanup (b) Backup (c) Cleaning CPU cabinet (d) Installing antivirus software
Answer: (a) Disk cleanup
4. Which one of the following shortcut keys is used to paste a file?
(a) Ctrl + C (b) Ctrl + P (c) Ctrl + V (d) Ctrl + X
Answer: (c) Ctrl + V
5. How can an antivirus protect your device?
(a) It can protect it from over-heating. (b) It can increase its performance.
(c) It can prevent data from getting corrupt. (d) It can backup data.
Answer: (c) It can prevent data from getting corrupt.
6. Which option is not required to keep a device cool?
(a) Keep the device unplugged when in use. (b) Do not cover the laptop with a blanket.
(c) Make sure the computer’s CPU fan is working. (d) Avoid leaving the device in the sun.
Answer: (a) Keep the device unplugged when in use.
7. Which of the following is essential for maintaining keyboard?
(a) Turn the keyboard upside down and shake it to remove.
(b) Blow dust and other particles with the help of a blower.
(c) Use a very diluted combination of soap and water applied with a non-abrasive cloth to remove stains from the keycaps.
(d) All of the above
Answer: (d) All of the above

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Thursday, April 30, 2026

What is MS Excel-Formula and Functions?-Class-7-Ch-2(2026-27):

CBSE SOLUTIONS-2026-27 ,
What is MS Excel-Formula and Functions?-Class-7-Ch-2(2026-27):


CBSE SOLUTIONS-2026-27
CLASS-7
CHAPTER-2 MS Excel-Formula and Functions

A. Use your pencil and fill the correct circles:
1. When you copy or move the formula to other cells, the reference cell automatically gets changed known as:
(A) Absolute reference
(B) Relative reference
(C) Mixed reference
(D) None of these
 Answer: (B) Relative reference

2. In order to work correctly, a function must be written in a specific way, called the:
(A) Arguments
(B) Equal to
(C) AutoSum
(D) Syntax
Answer: (D) Syntax

3. The AutoSum option is present in the ________ group on the Home tab.
(A) Insert
(B) Editing
(C) Clipboard
(D) None of these
Answer: (B) Editing

4. An error that occurs when the number is divided by 0 is:
(A) #VALUE
(B) #NAME?
(C) #####
(D) #DIV/0!
Answer: (D) #DIV/0!

5. This function finds the largest number in a range:
(A) Average
(B) Count
(C) Max
(D) Min
Answer: (C) Max

B. Write TRUE or FALSE:
1. An Excel formula always begins with an equal to (=) sign.
Answer: TRUE
2. The #VALUE! Error occurs if the formula is used incorrectly.
Answer: TRUE
3. The commonly used functions in MS Excel include Sum, Product, Average, Max, Min and Count.
Answer: TRUE
4. There are six types of cell references in MS Excel 2021.
Answer: FALSE
5. The Paste option is found in the Clipboard group on the Home tab.
Answer: TRUE

C. Fill in the blanks with the words given below:
1. While filling cells, sometimes it is not necessary to ________ a cell reference.
Answer: change
2. Absolute references use a dollar sign ($) to look a specific ________ or part of a cell reference.
Answer: cell
3. In the ________, the first cell address does not include a dollar sign.
Answer: formula
4. In ________ reference, either the row or column remains fixed.
Answer: mixed
5. Most ________ programs allow you to reference cells from different worksheets.
Answer: spreadsheet

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Wednesday, April 29, 2026

WHAT IS NETWORKING?-CLASS-8-CH-2(2026-27):

CBSE SOLUTIONS-2026-27 ,
WHAT IS NETWORKING?-CLASS-8-CH-2(2026-27):


CBSE SOLUTIONS-2026-27
CLASS-8
CHAPTER-2 NETWORKING: DIGITAL BRIDGES

A. Multiple Choice Questions
1. This device helps your computer to connect to the internet:
(A) Wi-Fi (B) LAN (C) MAN (D) Modem
Answer: (D) Modem

2. This device connects computers in a network:
(A) Modem (B) Switch (C) Both A & B (D) None of these
Answer: (B) Switch

3. It carries pieces of the message, like a puzzle:
(A) Switch (B) Hub (C) Packet (D) Modem
Answer: (C) Packet

4. This uses a wireless antenna that increases the communication range of the radio signal:
(A) Router (B) Switch (C) Both A & B (D) None of these
Answer: (A) Router

5. An overall design of a computer network is called:
(A) WAN (B) LAN (C) MAN (D) Network architecture
Answer: (D) Network architecture

B. Write TRUE or FALSE
1. A MAN is a network that covers larger area than a LAN.
Answer: TRUE

2. A PAN is a global computer network that spreads across cities, countries or continents.
Answer: FALSE

3. A WAN typically connects devices such as printers, phones, PDAs and laptops.
Answer: FALSE

4. The architecture of a network can be defined as the structure and organization of the company’s hardware and software.
Answer: TRUE

5. Twisted pair cables were invented by Alexander Graham Bell in 1881.
Answer: TRUE

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