Question 1

Question 1All computer systems can be split into three main components. These are shown in the following diagram.Complete the diagram below by adding the names of four different input devices and four different output devices.

Accepted Answer

The completed diagram showing four different input & output devices is given below:

Question 2

Question 5Draw a diagram to show how these components are connected in an ICT system :ProcessInputOutputBacking Store

Accepted Answer

Below diagram shows an ICT system along with its different components:

Question 3

Question 2How are computers used in the field of Research and Education?

Accepted Answer

Computers facilitate research work in a very effective way by performing complex computations, which sometimes seem impossible for humans. Some of them are listed below:The computations required for launching a new satellite into space.Earthquake and Tsunami warnings are possible with the aid of computers.Weather forecasting is done with the help of computers.Impact of nuclear tests can be studied using computers.Computers aid in the field of education in the following ways:The multimedia rich computerized animations and videos help students to understand the concepts in a very simple and effective manner.Virtual classrooms use video conferencing and online modules of study material for learning.With the advent of e-learning, students can study according to their time schedule.Online entrance exams at national and international level are being conducted with the help of computers.The results of various education boards as well as entrance exams are available online.Students can find information about various colleges through the Internet and can apply online for the desired courses.

Question 4

Question 3How are computers used in the field of sports and military?

Accepted Answer

Computers are used extensively in the field of sports.The sports equipments used by athletes are first tested on computers.There is a large number of computerized training equipment, which have inbuilt programs to train the sports person.The training of athletes is done with the aid of computers.Updation of scoreboards, recording speed of players, action replays, and printing and selling of tickets are some of the sports related activities which are also done with the help of computers.Computers play a vital role in the field of military.Computers are used in the design and development of high-tech weapons for defense where absolute accuracy is essential.Computerized simulation exercises are very helpful in training the pilots.Computers help in fighting terror and terrorists and their hideouts can be located anywhere in the world with high accuracy.Computer technology enables governments around the world to successfully execute their plans through effective planning.

Question 5

Question 4Explain the importance of computers in the government sector and law enforcement.

Accepted Answer

Government sector is making use of computer technology for official correspondence, budgeting, accounts, reporting, payroll, attendance, uploading of various schemes, forms, etc. Sectors like the census bureau, income tax, airlines, and railways, electricity boards, and telephone exchanges have benefitted greatly from the computer technology.Computers play an important role in law enforcement. The traffic police uses speed cameras on traffic lights to monitor people for law violation. The police also uses computers to track the information of stolen automobiles and mobile phones in order to catch the criminals in less time.

Question 6

Question 6Explain the input, process and output cycle for the withdrawal of 2000 rupees from your savings account, using an ATM card.

Accepted Answer

The input, process and output cycle for the withdrawal of 2000 rupees from my savings account, using an ATM card is as follows:Input:Insert ATM card — ATM card is inserted into the card reader slot on the ATM machine.Enter PIN — Enter the PIN on the ATM's keypad.Enter the amount to withdraw which in this case will be 2000.Process:Card authentication — The ATM machine processes the information on the card and authenticates the card.PIN verification — The entered PIN is then validated to ensure it matches the one associated with the bank account.Account verification — The ATM establishes a connection with the bank's computer system to verify the account details, balance, and transaction limits.Funds availability check — The system checks if the account has sufficient funds to complete the withdrawal, else the transaction will be declined.Dispense 2000 rupees — The ATM processes the withdrawal request, and the cash dispenser mechanism inside the ATM is activated to count and dispense 2000 rupees in the form of bank notes.Update account balance — The bank's computer system updates the account balance to reflect the withdrawal.Output:Dispensed cash — The ATM dispenses the requested amount (2000 rupees) in banknotes through a secure slot.Optional receipt — Optionally, the ATM may offer you a transaction receipt.Transaction completion — The ATM returns your card, and the display usually shows a message indicating that the transaction is complete.

Question 7

Question 7Differentiate between Primary and Secondary memory.

Accepted Answer

Primary MemorySecondary MemoryIt is the main memory of the computer system.It is the auxiliary memory from where stored data can be retrieved.Data and instructions get erased as soon as the computer is switched off.Data or instructions are stored for future use, even when the computer has been switched off.It provides faster data access.It provides slower data access.It is used for processing data.It is used for storing large amounts of data permanently.It is small in size.It is of large size.It is also called main memory or internal memory.It is also called auxiliary memory or external memory.Examples are RAM and ROM.Examples are hard disk, CD, DVD, flash drive etc.

Question 8

Question 8What is a CPU? Explain the different parts of a CPU.

Accepted Answer

CPU is the main unit of a computer. It controls all the internal and external devices of a computer and performs arithmetic and logical operations. CPU is very small and is referred to as a microprocessor.There are mainly three components of a CPU:Memory Unit (MU) — The memory unit is the principal storage of the computer. It stores both data and instructions. Computer memory is classified into two categories:i. Internal Memory — It stores data and programs temporarily as long as they are being executed. It is very fast and expensive but has limited storage capacity. For example, RAM and ROM.ii. External memory — It stores data and programs permanently. For example, hard disk, CD/DVD etc.Arithmetic and Logical Unit (ALU) — All the arithmetical and logical operations are performed through this unit. An arithmetical operation includes addition, subtraction, multiplication, division and logical operations include all types of comparisons.Control Unit (CU) — This unit controls each and every part of the computer system along with the peripherals. It extracts the instructions from memory, decodes them and sends the necessary signals to ALU to perform the required operation. It is also called the central nervous system of a computer system as it manages all other units.

Question 9

Question 9What do you know about Microcomputers? Explain any two types of Microcomputers, which you commonly find in day to day life.

Accepted Answer

Microcomputers or personal computers use a microprocessor. They cost less and are very small in size. The most popular type of personal computers are the IBM PC and the Apple. The desktop computers that we use in our school labs, offices, homes etc. are micro-computers.Two types of Microcomputers are:Notebook Computer — It is an extremely light weight personal computer. It weighs around 5-6 pounds and is smaller in size than a laptop computer. A notebook does not have an integrated DVD drive like laptop. It generally has smaller memory than a laptop.Tablet PC — A tablet PC looks similar to a laptop. A Tablet PC does not have a keyboard. It has a touch screen which is used to write directly on the screen rather than typing on a keyboard. Some common examples of Tablet PCs are Apple iPad, Samsung Galaxy Tab, etc.

Question 10

Question 12The special high speed memory which stores frequently used instructions so that a CPU can access them quickly is called ............... .DRAMCachePROMFlash memory

Accepted Answer

CacheReason — The special high speed memory which stores frequently used instructions so that a CPU can access them quickly is called Cache memory.

Source: This question is from Computer System, Computer Applications &mdash; Class 9, CBSE Board.
Key Concepts CoveredThis question tests your understanding of the following concepts from the chapter Computer System: Question, Special, High, Speed, Memory, Stores. These are fundamental topics in Computer Applications that students are expected to master as part of the CBSE Class 9 curriculum.A thorough understanding of these concepts will help you answer similar questions confidently in your CBSE examinations. These topics are frequently tested in both objective and subjective sections of Computer Applications papers. We recommend revising the relevant section of your textbook alongside practising these solved examples to build a strong foundation.
How to Approach MCQsMultiple choice questions test your ability to quickly recall facts and apply concepts. Read all options carefully before selecting your answer. Use the process of elimination to rule out clearly incorrect options first. If two options seem similar, look for the subtle difference that makes one more accurate. For numerical MCQs, verify your answer by substituting it back into the problem.
Key Points to RememberWrite programs with proper indentation and comments.
Trace through your code with sample inputs to verify correctness.
Explain the logic behind each step of your solution.
Familiarise yourself with common library functions and methods.
Related Questions from Computer SystemQ1: Question 1 All computer systems can be split into three main components. These are shown in the...
Q10: Question 10 How can computers be classified ?
Q13: Question 13 The memory which is programmed at the time of manufacturing and cannot be modified...
Q14: Question 14 In which form is the data represented in Digital computers? Analog form Decimal form...
Q15: Question 15 Which of the following category is not included in Microcomputers? Tablet PC Laptop...
Practice more questions from Computer System &mdash; Computer Applications, Class 9 CBSE

Question 11

Question 13The memory which is programmed at the time of manufacturing and cannot be modified later is called ............... .EPROMPROMROMRAM

Accepted Answer

PROMReason — The memory which is programmed at the time of manufacturing and cannot be modified later is called Programmable Read Only Memory (PROM).

Source: This question is from Computer System, Computer Applications &mdash; Class 9, CBSE Board.
Key Concepts CoveredThis question tests your understanding of the following concepts from the chapter Computer System: Question, Memory, Programmed, Time, Manufacturing, Cannot. These are fundamental topics in Computer Applications that students are expected to master as part of the CBSE Class 9 curriculum.A thorough understanding of these concepts will help you answer similar questions confidently in your CBSE examinations. These topics are frequently tested in both objective and subjective sections of Computer Applications papers. We recommend revising the relevant section of your textbook alongside practising these solved examples to build a strong foundation.
How to Approach MCQsMultiple choice questions test your ability to quickly recall facts and apply concepts. Read all options carefully before selecting your answer. Use the process of elimination to rule out clearly incorrect options first. If two options seem similar, look for the subtle difference that makes one more accurate. For numerical MCQs, verify your answer by substituting it back into the problem.
Key Points to RememberWrite programs with proper indentation and comments.
Trace through your code with sample inputs to verify correctness.
Explain the logic behind each step of your solution.
Familiarise yourself with common library functions and methods.
Related Questions from Computer SystemQ1: Question 1 All computer systems can be split into three main components. These are shown in the...
Q10: Question 10 How can computers be classified ?
Q12: Question 12 The special high speed memory which stores frequently used instructions so that a CPU...
Q14: Question 14 In which form is the data represented in Digital computers? Analog form Decimal form...
Q15: Question 15 Which of the following category is not included in Microcomputers? Tablet PC Laptop...
Practice more questions from Computer System &mdash; Computer Applications, Class 9 CBSE

Question 12

Question 14In which form is the data represented in Digital computers?Analog formDecimal formBinary formOctal form

Accepted Answer

Binary formReason — The data is represented in binary form in digital computers.

Source: This question is from Computer System, Computer Applications &mdash; Class 9, CBSE Board.
Key Concepts CoveredThis question tests your understanding of the following concepts from the chapter Computer System: Question, Form, Data, Represented, Digital, Computers. These are fundamental topics in Computer Applications that students are expected to master as part of the CBSE Class 9 curriculum.A thorough understanding of these concepts will help you answer similar questions confidently in your CBSE examinations. These topics are frequently tested in both objective and subjective sections of Computer Applications papers. We recommend revising the relevant section of your textbook alongside practising these solved examples to build a strong foundation.
How to Approach MCQsMultiple choice questions test your ability to quickly recall facts and apply concepts. Read all options carefully before selecting your answer. Use the process of elimination to rule out clearly incorrect options first. If two options seem similar, look for the subtle difference that makes one more accurate. For numerical MCQs, verify your answer by substituting it back into the problem.
Key Points to RememberWrite programs with proper indentation and comments.
Trace through your code with sample inputs to verify correctness.
Explain the logic behind each step of your solution.
Familiarise yourself with common library functions and methods.
Related Questions from Computer SystemQ1: Question 1 All computer systems can be split into three main components. These are shown in the...
Q10: Question 10 How can computers be classified ?
Q12: Question 12 The special high speed memory which stores frequently used instructions so that a CPU...
Q13: Question 13 The memory which is programmed at the time of manufacturing and cannot be modified...
Q15: Question 15 Which of the following category is not included in Microcomputers? Tablet PC Laptop...
Practice more questions from Computer System &mdash; Computer Applications, Class 9 CBSE

Question 13

Question 15Which of the following category is not included in Microcomputers?Tablet PCLaptop computerSupercomputerHandheld devices

Accepted Answer

SupercomputerReason — Supercomputer is not included in Microcomputers.

Source: This question is from Computer System, Computer Applications &mdash; Class 9, CBSE Board.
Key Concepts CoveredThis question tests your understanding of the following concepts from the chapter Computer System: Question, Category, Included, Microcomputers, Tablet, Laptop. These are fundamental topics in Computer Applications that students are expected to master as part of the CBSE Class 9 curriculum.A thorough understanding of these concepts will help you answer similar questions confidently in your CBSE examinations. These topics are frequently tested in both objective and subjective sections of Computer Applications papers. We recommend revising the relevant section of your textbook alongside practising these solved examples to build a strong foundation.
How to Approach MCQsMultiple choice questions test your ability to quickly recall facts and apply concepts. Read all options carefully before selecting your answer. Use the process of elimination to rule out clearly incorrect options first. If two options seem similar, look for the subtle difference that makes one more accurate. For numerical MCQs, verify your answer by substituting it back into the problem.
Key Points to RememberWrite programs with proper indentation and comments.
Trace through your code with sample inputs to verify correctness.
Explain the logic behind each step of your solution.
Familiarise yourself with common library functions and methods.
Related Questions from Computer SystemQ1: Question 1 All computer systems can be split into three main components. These are shown in the...
Q10: Question 10 How can computers be classified ?
Q12: Question 12 The special high speed memory which stores frequently used instructions so that a CPU...
Q13: Question 13 The memory which is programmed at the time of manufacturing and cannot be modified...
Q14: Question 14 In which form is the data represented in Digital computers? Analog form Decimal form...
Practice more questions from Computer System &mdash; Computer Applications, Class 9 CBSE

Question 14

Question 16A computer is not able to ............... .ThinkReduce usage of paperReduce manpowerIncrease efficiency

Accepted Answer

ThinkReason — A computer is not able to think. It only follows the instructions of its user.

Source: This question is from Computer System, Computer Applications &mdash; Class 9, CBSE Board.
Key Concepts CoveredThis question tests your understanding of the following concepts from the chapter Computer System: Question, Computer, Able, Think, Reduce, Usage. These are fundamental topics in Computer Applications that students are expected to master as part of the CBSE Class 9 curriculum.A thorough understanding of these concepts will help you answer similar questions confidently in your CBSE examinations. These topics are frequently tested in both objective and subjective sections of Computer Applications papers. We recommend revising the relevant section of your textbook alongside practising these solved examples to build a strong foundation.
How to Approach MCQsMultiple choice questions test your ability to quickly recall facts and apply concepts. Read all options carefully before selecting your answer. Use the process of elimination to rule out clearly incorrect options first. If two options seem similar, look for the subtle difference that makes one more accurate. For numerical MCQs, verify your answer by substituting it back into the problem.
Key Points to RememberWrite programs with proper indentation and comments.
Trace through your code with sample inputs to verify correctness.
Explain the logic behind each step of your solution.
Familiarise yourself with common library functions and methods.
Related Questions from Computer SystemQ1: Question 1 All computer systems can be split into three main components. These are shown in the...
Q10: Question 10 How can computers be classified ?
Q12: Question 12 The special high speed memory which stores frequently used instructions so that a CPU...
Q13: Question 13 The memory which is programmed at the time of manufacturing and cannot be modified...
Q14: Question 14 In which form is the data represented in Digital computers? Analog form Decimal form...
Practice more questions from Computer System &mdash; Computer Applications, Class 9 CBSE

Question 15

Question 17The speed of a CPU is measured in ............... .MBCBTBMhz

Accepted Answer

MhzReason — The speed of a CPU is measured in Mhz.

Source: This question is from Computer System, Computer Applications &mdash; Class 9, CBSE Board.
Key Concepts CoveredThis question tests your understanding of the following concepts from the chapter Computer System: Question, Speed, Cpu, Measured, Mhz, Computer System. These are fundamental topics in Computer Applications that students are expected to master as part of the CBSE Class 9 curriculum.A thorough understanding of these concepts will help you answer similar questions confidently in your CBSE examinations. These topics are frequently tested in both objective and subjective sections of Computer Applications papers. We recommend revising the relevant section of your textbook alongside practising these solved examples to build a strong foundation.
How to Approach MCQsMultiple choice questions test your ability to quickly recall facts and apply concepts. Read all options carefully before selecting your answer. Use the process of elimination to rule out clearly incorrect options first. If two options seem similar, look for the subtle difference that makes one more accurate. For numerical MCQs, verify your answer by substituting it back into the problem.
Key Points to RememberWrite programs with proper indentation and comments.
Trace through your code with sample inputs to verify correctness.
Explain the logic behind each step of your solution.
Familiarise yourself with common library functions and methods.
Related Questions from Computer SystemQ1: Question 1 All computer systems can be split into three main components. These are shown in the...
Q10: Question 10 How can computers be classified ?
Q12: Question 12 The special high speed memory which stores frequently used instructions so that a CPU...
Q13: Question 13 The memory which is programmed at the time of manufacturing and cannot be modified...
Q14: Question 14 In which form is the data represented in Digital computers? Analog form Decimal form...
Practice more questions from Computer System &mdash; Computer Applications, Class 9 CBSE

Question 16

Question 18............... is a quick and convenient way to send short messages.MMSSMSE-MailNone of these

Accepted Answer

SMSReason — SMS is a quick and convenient way to send short messages.

Source: This question is from Computer System, Computer Applications &mdash; Class 9, CBSE Board.
Key Concepts CoveredThis question tests your understanding of the following concepts from the chapter Computer System: Question, Quick, Convenient, Way, Send, Messages. These are fundamental topics in Computer Applications that students are expected to master as part of the CBSE Class 9 curriculum.A thorough understanding of these concepts will help you answer similar questions confidently in your CBSE examinations. These topics are frequently tested in both objective and subjective sections of Computer Applications papers. We recommend revising the relevant section of your textbook alongside practising these solved examples to build a strong foundation.
How to Approach MCQsMultiple choice questions test your ability to quickly recall facts and apply concepts. Read all options carefully before selecting your answer. Use the process of elimination to rule out clearly incorrect options first. If two options seem similar, look for the subtle difference that makes one more accurate. For numerical MCQs, verify your answer by substituting it back into the problem.
Key Points to RememberWrite programs with proper indentation and comments.
Trace through your code with sample inputs to verify correctness.
Explain the logic behind each step of your solution.
Familiarise yourself with common library functions and methods.
Related Questions from Computer SystemQ1: Question 1 All computer systems can be split into three main components. These are shown in the...
Q10: Question 10 How can computers be classified ?
Q12: Question 12 The special high speed memory which stores frequently used instructions so that a CPU...
Q13: Question 13 The memory which is programmed at the time of manufacturing and cannot be modified...
Q14: Question 14 In which form is the data represented in Digital computers? Analog form Decimal form...
Practice more questions from Computer System &mdash; Computer Applications, Class 9 CBSE

Question 17

Question 11Give three examples of input and output devices.

Accepted Answer

Three examples of input devices are keyboard, mouse and scanner.Three examples of output devices are monitor, printer and speaker.

Source: This question is from Computer System, Computer Applications &mdash; Class 9, CBSE Board.
Key Concepts CoveredThis question tests your understanding of the following concepts from the chapter Computer System: Question, Input, Output, Devices, Computer System, Computer Applications. These are fundamental topics in Computer Applications that students are expected to master as part of the CBSE Class 9 curriculum.A thorough understanding of these concepts will help you answer similar questions confidently in your CBSE examinations. These topics are frequently tested in both objective and subjective sections of Computer Applications papers. We recommend revising the relevant section of your textbook alongside practising these solved examples to build a strong foundation.
How to Approach This QuestionRead the question carefully and identify what is being asked. Break down complex questions into smaller parts. Use the terminology and concepts discussed in this chapter. Structure your answer logically — begin with a definition or key statement, then provide supporting details. Review your answer to ensure it addresses all parts of the question completely.
Key Points to RememberWrite programs with proper indentation and comments.
Trace through your code with sample inputs to verify correctness.
Explain the logic behind each step of your solution.
Familiarise yourself with common library functions and methods.
Related Questions from Computer SystemQ1: Question 1 All computer systems can be split into three main components. These are shown in the...
Q10: Question 10 How can computers be classified ?
Q12: Question 12 The special high speed memory which stores frequently used instructions so that a CPU...
Q13: Question 13 The memory which is programmed at the time of manufacturing and cannot be modified...
Q14: Question 14 In which form is the data represented in Digital computers? Analog form Decimal form...
Practice more questions from Computer System &mdash; Computer Applications, Class 9 CBSE

Question 18

Question 10How can computers be classified ?

Accepted Answer

Computers can be classified into following types :Embedded Computers — These computers are in the form of tiny chips embedded within the circuitry of appliances such as televisions, washing machines, wrist watches, etc.Programmable Computers — These computers can be used as notepads, scheduling systems, address books etc. With cellular phones, these can connect to worldwide computer networks to exchange information regardless of location.Laptop Computers & Personal Computers — These computers are typically used in businesses and at home to communicate on computer networks, for word processing to track finances, to play games etc.Workstations — These computers are similar to PCs but have more capabilities. These are typically found in scientific, industrial and business environments that require high levels of computational abilities.Mainframes — These computers are even more capable than workstations and can be used by multiple users.Supercomputers — These computers are the most powerful computers that are used to process complex and time-consuming calculations. They are used by the largest business institutes/houses, scientific institutions and the defence.

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