Explore the solutions chapter-wise:
SL. No. | Contents |
|---|---|
Chapter 1 | |
Chapter 2 | |
Chapter 3 | Office Application |
Chapter 4 | Introduction to Internet |
Chapter 5 | Ethics In it |
Chapter 6 | Database |
Chapter 7 | Coding and Its Importance |
Chapter 8 | Introduction to C Programming |
Chapter 9 | Exploring C Programming Language |
Chapter 10 | Recent Developments in It |
Chapter 11 | Case Studies Applications of it in Daily Use |
Chapter 1: Basics of Computer System
Short Answer Type Questions
1. Who is known as the ‘father of the modern computer’?
Ans: Charles Babbage.
2. What is a computer?
Ans: Computer is an electronic device for storing and processing data, typically in binary from, according to instructions given to it.
3. Name a popular pointing device.
Ans: Mouse.
4. Who invented Jacquard’s loom?
Ans: Joseph Jacquard.
5. Give the full from of ENIAC and EDVAC.
Ans:
ENIAC – Electronic Numerical Integrator and computer
EDVAC – Electronic Discrete Variable Automatic Calculator.
6. Give two examples of second-generation computers.
Ans: IBM604, IBM1401, UNIVAC 1108
7. What is AI?
Ans: Artificial intelligence (AI) is the science of making machines that can think like humans. It can do things that are considered “smart.” AI technology can process large amounts of data in ways, unlike humans.
8. Give two examples of secondary memories.
Ans:
i) Floppy disk
ii) Hard disk.
9. What does the CPU do?
Ans: A Central processing unit (CPU) interprets, processes, and executes instructions, most often from the hardware and software programs running on the device.
The CPU performs arithmetic, logic, and other operations to transform data input into more usable information output.
10. Why do we use secondary memory?
Ans: We use secondary memory because
i) Large Storage: Secondary memory provides large storage space so that we can store large data like videos, images, audio, files, etc. permanently.
ii) Portable: Some secondary devices are removable. So, we can easily store or transfer data from one computer or device to another.
11. Give two examples of pointing devices.
Ans: Mouse and Trackball.
12. Which input device is used to record sound?
Ans: Microphone.
13. What is the use of a barcode reader?
Ans: A barcode reader is used to read information stored in a barcode. A barcode is a system of representing data using machine-readable lines.
14. What is system software? Give two examples.
Ans: System software is a type of computer program that is designed to run a computer’s hardware and application programs.
Examples –
- Operating system, 2. Encryption/Decryption Software
15. What is the role of CU?
Ans: The control unit (CU) is a component of a computer’s central processing unit (CPU) that directs the operation of the processor.
It tells the computer’s memory, arithmetic/logic unit, and input and output devices on how to respond to a program’s instructions.
16. What is the function of ALU?
Ans: ALU is the Arithmetic and Logic Unit. Which performs all the arithmetic and logical operations such as addition, subtraction, logical AND and OR etc.
17. What do you understand by memory word?
Ans: computer memory is the storage space in the computer. The memory unit provides space for storing data and instructions, space for intermediate results, and also space for the final results.
18. What is the function of a Compiler?
Ans: A compiler is a special program that translates a programming language’s source code into machine code, bytecode, from a high-level programming language to a lower-level language. The source code is typically written in a high-level, human-readable language such as Java or C++.
19. What is the main limitation of a computer?
Ans: The main limitations of a computer are:
- The Computer cannot operate without the instructions given by humans.
- It cannot respond in a particular situation unless that situation is already programmed into them.
20. Mention three main features of a computer.
Ans: The main features of a computer are:
- Speed: A computer works at a much higher speed.
- Accuracy: Computers perform calculations with 100% accuracy. Errors may occur due to data inconsistency or inaccuracy.
- Memory: A computer has built-in memory called primary memory where it stores data.
21. What is a computer program?
Ans: A computer program is a collection of instructions that can be executed by a computer to perform a specific task. A computer program is usually written by a computer programmer in a programming language.
22. What are the fundamental components of a computer system?
Ans: The fundamental components of a computer system are:
- Motherboard
- Central Processing Unit (CPU)
- Graphical Processing Unit (GPU)
- Random Access Memory (RAM)
- Storage device.
23. What is application software?
Ans: Application software is a type of computer program that performs a specific personal, educational, and business function.
Microsoft Word and Excel, as well as popular web browsers like Firefox and Google Chrome, are examples of application software.
24. Mention various categories of application software?
Ans: Application software can be divided into two categories:
i)) The first is general software like word processors, web browsers, spreadsheet software, etc.
ii) The second type of software is custom software customized according to the need of the user and their organizational needs
25. What do you understand by computer memory?
Ans: Computer memory is the storage space in the computer. The memory unit provides space for storing data and instructions, space for intermediate results, and also space for the final results.
26. What is the binary equivalent of hexadecimal 15 ?
Ans: (00010101)₂
Long Answer Questions
1. Mention four features of a computer system.
Ans:
i) Speed: A computer can do Millions of Calculations in a matter of time, for which a simple person takes a lot of time to do the work, a computer can do that work very well in a very short time.
ii) Accuracy: Computers are very fast as well as very accurate. It does not make any kind of mistake in calculating. sometimes we get some errors but these are because of the mistake performed by us.
iii) Diligence: A person gets tired of doing some work in a few hours and a computer has the ability to do any work continuously for many hours, days, or months.
iv) Storage: A computer can store a large amount of data, which is the biggest feature of a computer. Inside the computer, we can store many types of data such as images, videos, text, audio, files, etc.
2. Mention the characteristics features of third-generation computers.
Ans: Characteristics of Third Generation of computers:
i) Use of Integrated Circuits (IC) instead of transistors
ii) Use of Semiconductor memory
iii) Small size than previous generation computers
iv) Use of magnetic storage devices
v) Improved faster operations and more dependable output
vi) Use of mini computers
3. What do you understand by generation of computers? Mention two disadvantages of first – generation computers.
Ans: Generation in computer terminology is a change in technology a computer is/was being used. Initially, the generation term was used to distinguish between varying hardware technologies. Nowadays, generation includes both hardware and software which together make up an entire Computer system.
The disadvantages of first-generation computers:
i) The computers were very large in size.
ii) They consumed a large amount of energy.
iii) They get heated very soon due to thousands of vacuum tubes.
iv) They were not reliable.
vi) Constant maintenance was required.
vii) Not-portable.
viii) Costly commercial production.
4. Describe the functioning of CPU.
Ans: The functions of the CPU are:
(i) The CPU receives the data when the computer inputs the data through an input device such as a keyboard or mouse.
(ii) After this, the CPU process these input data by performing calculations and technical algorithm.
(iii) And then CPU provides the processed data through output devices such as on the monitor screen.
(iv) The CPU also stores the process data in the from of a cache for future use.
5. Discus Draw a block diagram of a computer system.
Ans: A computer basically performs five major operations:
i) Accepting data or instructions
ii) Processing data
iii) storing data
iv) Displaying results
v) Controlling and coordinating all operations inside a computer
A computer system consists of a unit to perform each of the above functions.
6. What are the categories of printers? Explain.
Ans: A printer is a hardware output device that is used to generate hard copy and print any document. A document can be of any type such as a text file, image, or a combination of both. It accepts input commands by users on a computer or on other devices to print the documents.
Printers can be divided into two distinct categories:
(i) Impact printer: In these Printers, there is a physical contact between the printhead and paper. Impact printers are subdivided into Line Printers and Character printers.
Line Printer prints one line of text at a time. Examples of line Printers are: drum printer and chain printer.
Character printer prints one character at a time. Examples of character printers are-Dot matrix printer, letter-quality printer.
(ii) Non-impact printer: In these Printers, there is no physical contact between the printhead and paper. Non-impact printers are faster than impact printers. The main types of Non-impact printers are inkjet printer, thermal printer, electromagnetic printer, and laser printer.
7. What is a bus? Explain three types of buses.
Ans: A bus is a subsystem that is used to connect computer components and transfer data between them.
There are three main buses.
i) Data bus: It carries data from the memory to the CPU and the CPU to the memory.
ii) Address bus: It carries the address from the CPU to the memory.
iii) Control bus: It carries instructions between the CPU and other parts of the computer.
8. What are the functions of a primary storage area?
Ans: Primary storage is the component of the computer that holds data, programs, and instructions that are currently in use. Primary storage is located on the motherboard. As a result, data can be read from and written to primary storage extremely quickly.
9. Explain three types of ROM.
Ans: The different types of ROM are:
i) PROM ( programmable Read Only Memory) is read-only memory that can be programmed to store information only once by a user. It is not erasable.
ii) EPROM (Erasable Programmable Read Only Memory) can be reprogrammed to record different information. The recorded information can be erased by exposing it to ultraviolet light.
iii) EEPROM (Electrically Erasable Programmable Read Only Memory) can be programmed and erased electrically.
10. What is the purpose of a language processor? Explain the three language processors.
Ans: A language processor, or translator, is a computer program that translates source code from one programming language to another. They also identify errors during translation. Computer programs are usually written in high-level programming languages (like C++, Python, and Java)
i) Compiler: The language processor that reads the complete source program written in high-level language as a whole in one go and translates it into an equivalent program in machine language is called a Compiler. Example: C, C++, C#.
ii) Assembler: The Assembler is used to translate the program written in Assembly language into machine code. The source program is an input of an assembler It contains assembly language instructions.
iii) Interpreter: The translation of a single statement of the source program into machine code is done by a language processor and executes immediately before moving on to the next line is called an interpreter.
11. Difference between data and information.
Ans:
| Sl. No. | Data | Information |
|---|---|---|
| 1 | Data is a collection of facts | while information puts those facts into context. |
| 2 | While data is raw and unorganized | information is organized.. |
| 3 | Data doesn’t depend on information. | Information depends on data. |
| 4 | Raw data alone is insufficient for decision making | Information is sufficient for decision making |
| 5 | Data does not depend on information | Information depends on data |
| 6 | Data typically comes in the form of graphs, numbers, figures, or statistics | Information is typically presented through words, language, thoughts, and ideas. |
12. Write short notes on fifth-generation computers.
Ans: The period of fifth generation is 1980-till date. In the fifth generation, VLSI technology became ULSI (Ultra Large Scale Integration) technology, resulting in the production of microprocessor chips having ten million electronic components.
This generation is based on parallel processing hardware and AI (Artificial Intelligence) software. AI is an emerging branch in computer science, which interprets the means and method of making computers think like human beings. All the high-level languages like C and C++, Java, .Net, etc., are used in this generation.
Features of Fifth-generation Computers
The ULSI (ultra large scale integration) technology is used in this generation of computers.
Natural language processing is now in its fifth phase of development.
In this generation’s computers, artificial intelligence has progressed.
Parallel processing has advanced on these computers.
The fifth-generation computer includes more user-friendly interfaces and multimedia functions.
These PCs can be purchased for a lower price.
It’s easier to manufacture in a commercial setting.
Desktop computers are straightforward to operate.
Mainframe computers are extremely efficient.
13. What are the basic differences between the four generations of computers?
Ans: Over the years, many computing devices were invented that are used by humans to solve different types of problems. All these computing devices can be classified into five generations which refer to the phases of improvement made to different computing devices resulting in a small, cheap, fast, reliable and productive computer. The technological development in the field of computers not only refers to the improvements made to the hardware technologies but also the improvements made to the software technologies.
14. Write a short note on MARK – I.
Ans: Mark I was designed in 1937 by Harvard graduate student Howard H. Aiken to solve advanced mathematical physics problems encountered in his research. Aiken’s ambitious proposal envisioned the use of modified, commercially-available technologies coordinated by a central control system.
15. Explain the two main types of secondary memory.
Ans: The secondary storage devices which are built into the computer or connected to the computer are known as a secondary memory of the computer. It is also known as external memory or auxiliary storage.
The main types of secondary memory are:
Hard disks
Pen Drive
SD Card
(CD)
(DVD) etc.
16. Describe various types of magnetic media.
Ans: The various types of magnetic media are:
(i) Floppy disks: Floppy disks are a storage medium capable of holding electronic data, like a computer file. A floppy disk is a flexible disk with a magnetic coating on 1.44 MB of data.
(ii) Hard disks: A hard disk is a non-volatile data storage device. It is usually installed internally in a computer, attached directly to the disk controller of the computer’s motherboard.
(iii) Magnetic taps: Magnetic taps can hold a large amount of data. Magnetic tapes are available in the form of cassettes, reels, and cartridges.
(iv) Zip Diskette: Zip drive is used to operate the Zip disk. Zip disks had 100 and 250 MB of storage space that was used to save, share, and back up huge amount of data.
(v) SuperDisk: SuperDisk is a disk drive and diskette introduced by 3M, which became Imation. SuperDisk is capable of 120 MB storage over a single disk similar size of the oldest 1.44 MB floppy diskette, and further few times it was capable of storage 240 MB.
17. Mention some areas where computers are used widely.
Ans: Today, computers are used almost everywhere. Here are some of the areas where computers are in-use widely.
i) Business and Finance: Computers serve as indispensable tools for intricate tasks such as data analysis, financial modeling, accounting procedures, inventory management, and secure electronic transactions.
ii) Education: Within educational institutions, computers are harnessed for research purposes, online learning platforms, collaborative projects, multimedia presentations, and administrative duties. By providing access to vast amounts of information, they enhance the learning experience and foster knowledge acquisition.
iii) Communication: Computers, in conjunction with the Internet, revolutionize communication through avenues such as email, instant messaging, video conferencing, and the sprawling landscape of social media platforms. They foster global connectivity, enabling information exchange, collaboration, and vibrant social interactions.
iv) Healthcare: Computers play an instrumental role in the healthcare sector, facilitating critical activities including electronic medical records management, diagnostic imaging analysis, laboratory testing, patient monitoring systems, research endeavors, and advanced medical simulations. By fostering accuracy, efficiency, and comprehensive healthcare services, they elevate the standards of patient care.
v) Entertainment and Media: Within the entertainment industry, computers serve as creative powerhouses, driving video and audio editing, special effects in movies and games, digital artistry, animation, virtual reality (VR), and computer-generated imagery (CGI). Additionally, they underpin the seamless execution of online streaming, gaming experiences, and content creation.
18. What are the major operations performed by a computer?
Ans: Basic Operations of a computer system:
Accepting data or instructions
Processing data
Storing data
Displaying results
Controlling and coordinating all operations inside a computer.
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