Computer systems: Characteristics of a computer MCQs Quiz | Class 9
This quiz is for Class 9 students studying Computer Applications (Code 165), based on Unit 1: Basics of Information Technology. It covers key topics such as the characteristics of a computer: Speed, accuracy, diligence, versatility, storage, automation, and other basic features. Answer all 10 questions and click ‘Submit’ to see your score and download a PDF of your answers.
Understanding the Characteristics of a Computer
A computer is a powerful electronic device that processes data based on a set of instructions. Its effectiveness comes from a unique set of characteristics that make it indispensable in modern life. Let’s explore these fundamental features.
Key Characteristics Explained
1. Speed
Computers can perform calculations at an incredible speed. A modern computer can execute millions or even billions of instructions per second. This speed allows us to solve complex problems, process huge amounts of data, and get results almost instantly. The speed of a computer’s processor (CPU) is typically measured in Gigahertz (GHz).
2. Accuracy
Computers are highly accurate machines. If the input data and the instructions (program) are correct, the output will always be correct. This reliability is crucial in fields like science, finance, and engineering. However, it’s important to remember the principle of “GIGO” (Garbage In, Garbage Out), which means that incorrect input will lead to incorrect output.
3. Diligence
Unlike humans, a computer is free from monotony, tiredness, and lack of concentration. It can perform the same task repeatedly for hours with the exact same speed and accuracy without getting tired or making errors. This makes it perfect for repetitive jobs that require consistency.
4. Versatility
Versatility is the ability to perform a wide variety of tasks. A computer is a general-purpose machine. With the right software, the same hardware can be used for playing games, writing letters, doing calculations, designing buildings, or editing videos. This flexibility makes it a powerful tool in almost every field.
5. Storage
A computer has a large memory capacity where it can store vast amounts of data. This data can be stored permanently on devices like hard drives or SSDs and can be retrieved instantly whenever needed. This ability to store and recall information is fundamental to its operation.
6. Automation
Once a program is given to the computer, it can work automatically without any human intervention. It follows the sequence of instructions on its own until the job is completed. This is a key feature used in industrial control systems, robotics, and many other applications.
Summary of Characteristics
| Characteristic | Description |
|---|---|
| Speed | Performs millions of calculations per second. |
| Accuracy | Provides 100% correct results if input is correct. |
| Diligence | Can work for long hours without getting tired or making errors. |
| Versatility | Can perform a wide range of different tasks. |
| Storage | Can store large amounts of data permanently. |
| Automation | Can work automatically once instructions are given. |
Quick Revision Points
- A computer has no IQ or feelings; it cannot make decisions on its own. It only follows instructions.
- The principle of GIGO (Garbage In, Garbage Out) is linked to a computer’s accuracy.
- The CPU (Central Processing Unit) is the “brain” of the computer, responsible for its speed.
- Storage is divided into primary (like RAM) and secondary (like Hard Disk) memory.
Practice Questions
- What is the main limitation of a computer related to its “thinking” ability?
- Explain how the characteristic of ‘diligence’ is beneficial in the banking sector.
- If a calculator program gives the wrong answer for 2+2, is it a failure of accuracy? Explain using the GIGO principle.
- Provide two examples of how a computer’s ‘versatility’ is used in your school.
- Compare the storage capacity of a human brain with a computer’s storage. What are the key differences?
