CBSE COMPUTER BOOK FOR CLASS 9

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Also, Get CBSE Class 9 Hindi Sample Papers with Answers in PDF Form. Access latest Sample Papers for Class 9 Computer Science as per CBSE and in book for Class 9 Computer Science as per syllabus issued by CBSE and NCERT. CBSE Class-9 Syllabus (Computer Applications). COMPUTER APPLICATIONS CLASS IX (Code No) Effective from the session 1. CBSE Books -Class XIDownload ePub Reader · Home · Classes I-V · Classes VI- VIII · Classes IX-X Computer Science. Class: XI. Lang: English. Sub: IT. book.


Cbse Computer Book For Class 9

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The latest CBSE syllabus for class 9 has some very specific changes that the revised syllabus before downloading books and start preparing for new session. Find below the complete syllabus for CBSE Class 9 Computer. Information and Computer Technology Class IX. Ist Edition: . I am happy to release Information and communication Technology Book for Class – IX. I would. COMPUTER MATERIAL CLASS 3 to Click here for> Class III. Click here for > Click here for> Class VIII. Click here for> Class-IX. Click here for>.

It also determines whether a statement is true or false. It performs more boring, repetitive and monotonous task. CRUX Computer has taken the business activities to new horizons, today it very possible to commence business on a table using a single computer. Thanks to internet that now we can get any kind of information we needed in just few seconds. Q3: Give some examples of computer applications. Ans: Here some examples of computer application are: Controlling space flight Printing books Checking out groceries at the checkout counter Landing airplanes Tracking inventory Turning on lights at specified time Q4: What is the History of computers?

The history of computing is divided into three ages during which man invented and improved different types of calculating machines. Ans: Ages of Computer At the early age people used pebbles, stones, sticks, scratches, symbols and finger tips to count, which were later replaced by numbers.

These ages are, 1. Abacus consists of a rectangular wooden frame having rods which carry round beads.

Counting is done by shifting the beads from one side to another. Q6: Describe Napiers bones history? Ans: Napiers bones: John Napier was a Scottish mathematician. He made the first calculating device after abacus. It was called John Napiers bone or cardboard multiplication calculator.

In addition to multiplication this machine was also used to calculate square roots and cube roots. Q7: Describe Pascals Pascaline Calculator. Ans: Pascals Pascaline Calculator: Blas Pascal , the 18 years old son of a French tax collector, developed the first mechanical calculating machine in This machine consists of gears, wheels and dials. This device was known as pascaline and it was capable of adding and subtracting operations. Q8: Describe the Charles Babbage work in the history of computers?

Ans: Computer was invented because Necessity is the mother of invention. Man always searched for a first calculating device it took a long time to invent the digital computer. After 10 years, in , he made a general-purpose computer named Analytical Engine. This analytical engine could add, subtract, multiply and divide in automatic sequence at a rate of 60 additions per second. Lady Ada Augusta an assistant of Babbage is called the first programmer.

Ans: Herman Hollerith: In , an American inventor Herman Hollerith applied the idea of punch boards in the form of punch cards in computers for input and output. He invented a punched card tabulating machine. This machine could add, multiply and sort numbers.

Data were feed and results were produced on punched cards. As compared to todays machines, these computers were slow, usually processing cards per minute, each card holding about 80 decimal numbers characters. At that time, however, punched cards were a huge step forward. Q Give Von Neumann theory. These ideas, usually refer to as the stored program technique, because essential for future generations of high speed digital computers and were universally adopted. According to Von Neumann theory Data and program can be stored in the same memory.

Thus the machine can itself alter either its program or internal data. As a result of the ideas, computing and programming became much faster, more flexible and efficient. Q Write a note on different computer generations, briefly explaining their features. Ans: 1. First Generation: Vacuum Tubes Computers of this generation used Vacuum tubes to perform calculations.

Vacuum tubes were used as the principle of electronic component. Each computer had a different binary coded program called machine language that told it to how to operate. This made the computer difficult to program and limited its versatility and speed. Advantages: 1. Vacuum tubes were used as electronic component. Electronic digital computers were developed for the first time. These computers were the fastest calculating devices of their time.

Computations were performed in millisecond. Disadvantages: 1. Too large in size 2. Unreadable 3. Non-portable 4. Limited commercial use 5. Air conditioning required 2. Second generation: Transistors In with the invention of transistors, vacuum tubes were replaced with transistors. As a result, the size of electronic machinery has been shrunk. Second generation computers replaced machine language with Assembly language allowing abbreviated programming codes to replace long difficult binary codes.

External Storage - Magnetic tapes and Magnetic Disk. Operating System - Human handles punched card. More reliable Less heat generated Small in size as compared to first generation computers Better portability Less prone to hardware failures Disadvantages: 1.

Air conditioning required Software production was difficult and costly Very costly for commercial use Third generation: Integrated Circuits 10 The major invention of third generation computers was developed of the silicone IC Integrated Circuits. A single IC chip contains thousands of transistors.

These computers used magnetic core memory as internal storage. This technology was Small-scale integration SSI. Procedural languages were used in these computers. Languages - More high level languages. Operating System - Complete operating systems were introduced.

Smaller in size as compared to previous generation computers Easily movable More reliable. Portable Less electricity consumption. Heat generation was rare. General purpose computer. Disadvantages: 11 1.

Computer Notes for 9th Class

Air conditioning was required in many cases due to ICs. Very advance technology was required to make the ICs. In this technology circuits density approaching 10, components per chip.

Its memory access time was expressed in nanoseconds. A variety of storage device were used for storing data.

There was a great versatility of input and output devices. Input and Output Devices - Monitor for output. Languages - Languages and application software. Very advanced technology was required to fabricate to the ICs. It is a promise that such computers will real genuine real intelligence. They will work logically and having own decision making power. Scientists are working to increase the speed of computers.

They are trying to create a computer with real IQ with the help of advanced programming and technologies. Main Features: 1. External Storage - Modified magnetic and Optical disks.

Operating System - GUI based e. Windows 95, Windows NT. Computer Model: Hall 13 Advantages: 1. Very large storage capacity. Long bit processor builds. Artificial Intelligence Language developed. What are the types of computer? Ans: There are three types of computers: Types of computers Analog Computers Digital Computers Hybrid Computers Analog Computers: Computers which measures variable quantities along a continuous scale are called analog computers. Analog computers do not operate directly with numbers or digits.

The output can be obtained in analog signals that are in the form of graph or wave. Its can store limited amount of data. Processing speed of these computers is slow.

These are being manufactured in small sizes. Results obtained by analog computers are not accurate. Its readability is low due to output in the form of signals.

CBSE Class 12 Computer Science Previous Year Question Paper

These computers can be used to measure variable quantities such as weigh, height and temperature etc. Analog computers are mainly used in the field of Engineering, Medicine and Research centers.

Thermometer, analog watch and weight machine are the examples of analog computers. These computers measure any Physical quantities along discrete or fixed scale.

A digital computer is based on the rule of counting. In fact, digital computers used digital signals, which can distinguish between just two values 0 and 1. These computers can store large amount of data. Processing speed of these computers is fast. These are being manufactured in a wide variety of sizes.

Results obtained by digital computers are accurate. Its readability is high. These computers can be used to perform mathematical and logical operations such as Addition, Multiplication, Division, Subtraction, Less than, Equal to etc.

These computers are commonly used in offices, others institutions and even at home for personal use. Calculators, digital watch, personal computer are the examples of digital computers. Hybrid Computers: Hybrid computers have combined features of both analog and digital computers. Hybrid computers can get input and give results either in analog form or in digital form.

These computers can stores large amount of data as compared to analog computers. Calculation speed of these computers is also slow but fast than analog computers. These are being manufactured in various varieties of sizes.

Accuracy of these computers is high when output in digital form and low when output in analog form. Its readability is high when output in digital form and low when output in analog form.

These computers can be used to measure variable and physical quantities.

Hybrid computers are mainly used in engineering field and medical sciences. What is the difference between analog and digital computers? Analog data include distance, speed, pressure, temperature, and current etc. They are used for complex scientific and mathematical operations. These are also used in industrial units. Analog computers are very fast but not accurate. Digital Computers These are general purpose computers in many sizes and shapes.

These computers accept data in the form of digits. These computers are used for arithmetic and logic operations. Modern digital computers can store large amount of data. They are used in almost every field of life like research, business, education, health, supermarkets, factories, banking etc. Write down the classification of computers according to purpose.

Ans: Classification of Computers According to Purpose: 1. General Purpose Computers General purpose computers are designed to solve a large variety of problems. The different programs can be used to solve many problems. Most digital computers are general purpose computers and used in business and commercial data processing. Special Purpose Computers A computer designed for machine control or process control would be different than a general purpose computer.

The special purpose computers are designed to solve specific problems. The computer program for solving a specific problem is built right into the computer. Most analog computers are special purpose computers. These special purpose computers are widely used in industrial robotics. Ans: Classification According to Size: Computers are classified according to sizes, speed and memory capacity. Computers are of different types: 1.

They are used to process complex scientific jobs. These computers are very expensive and the speed is measured in billions of instructions per seconds. Supercomputers are manufactured using thousands of processors.

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Its size is equal to full room. These computers are used in Applications in medicine, Aerospace, Online banking and weather forecasting etc. There are very few companies in the world produce super computers. Cary research and ETA system Inc. These computers are capable of processing data at very high speed, millions of instructions per second and have access to billions of characters of data. The size of Mainframe is equal to door size or half room size.

Mainframes store large amounts of data, instructions and information. Many people can make use of the same machine at the same time. These computers are used in banks, educational institutions, insurance companies and airlines etc.

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Mini computers are smaller than mainframes, both in size and other facilities such as speed, storage capacity and other services. They are versatile that they can be fitted where ever they are needed. Their speeds are rated between one and fifty million instructions per second MIPS. They have primary storage in hundred to three hundred megabytes range with direct access storage device.

These computers are often used by Small and medium-sized companies or University departments. Following are the models of minicomputers: 4. They were introduced in the early 70s having less storing space and processing speed.

CBSE Syllabus for Class 9 Computer Applications 2018-19

Micro computers of today are equivalent to the mini computers of yesterday in terms of performing and processing. They are also called computer of a chip because its entire circuitry is contained in one tiny chip. These are single user computers.

These are less expensive computers. It has affordable price. Almost everyone can afford it. There are several companies of Micro computers. Q Explain the types of Microcomputers. They are usually user machines but can be interconnected among themselves to from a local area network.

Their speed depends upon the processor installed in the computer. Fast Forward reveals time-saving keyboard shortcuts for menu commands. Handy Hint gives useful tips on options available for different operations.

Geek Speak provides a glossary of important terms at the end of each chapter. At a Glance summarizes a chapter enabling a quick review of the concepts learnt.

Application-Based Questions within Exercises enables students to develop their analytical skills. Work Out! For the Teacher provides useful suggestions for developing complex or difficult concepts. Two formative assessment papers and one summative assessment paper based on the latest examination pattern complete the coverage for each term. A Dictionary of Computing. Fast Forward- Revised Edition Coursebook 7. Fast Forward- Revised Edition Coursebook 8. Foundations of Information Technology Class Matrix Computing for Student Book 1.

Student Book 2. Student Book 3. We use cookies to enhance your experience on our website. By continuing to use our website, you are agreeing to our use of cookies.

CBSE Class-9 Syllabus 2018-19 (Computer Applications)

You can change your cookie settings at any time. Find out more. Advanced search. You are here: Overview Description Features. We sell our titles through other companies site Go to site website.The data stored in the computer can be used at later time. Air conditioning required Software production was difficult and costly Very costly for commercial use Third generation: Integrated Circuits 10 The major invention of third generation computers was developed of the silicone IC Integrated Circuits.

A Text Book of Philosophy Class: It is written in the form of binary numbers that is in the form of 1 and 0. Presentation tool: Unit 3: Q Write down the Advantages and Disadvantages of Computers?

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