In today’s post, we be studying about the basic computer awareness and knowledge about hardware section as asked in various bank exams like IBPS and SBI.
What is Hardware?
Hardware refers to those parts of the computer system that we can touch or feel. In other words, the physical components of the computer.
The basic physical components aka Hardware required for operation of a computer:
- Input Devices
- Central Processing Unit aka CPU
- Output Devices
How exactly does computer work with theses components?
Software discussion aside, let’s just concentrate on the physical aspect. A computer can not process anything on it’s own. Basically it needs ‘data’ and ‘instruction’ to process anything. Input devices are used to feed information, or data to the computer. Example, you can type on keyboard to enter text in a MS-Word file. Since you are using keyboard to type in the data, Keyboard becomes the input device here.
The second step is processing information. Just feeding information to a computer is not enough. You also specify what to do with the data you just entered. Let’s take a very simple example. Calculator. You enter ‘3’ and ‘2’ into the calculator. But the calculator doesn’t know what to do with this data. Add them, or subtract them, or multiply them, etc. Lets say you specify to add them by entering ‘+’ symbol. Once you specify how to process the data, CPU aka the central processing unit does all the processing. CPU is usually cooled by a heat sink and fan.
The third step is memory. When the processing is being done by the CPU, it needs to temporarily store data. Likewise, once the data is processed, the result is also stored temporarily. This temporary storage is what is known as Memory. Example. RAM (Random Access Memory). The Chipset acts as a mediator between the CPU and the other components of the system, including main memory. The RAM aka Random Access Memory stores the code and data that are being actively accessed by the CPU. The ROM aka Read Only Memory stores the BIOS that runs when the computer is powered on; aka Bootstrapping.
The forth one is Output devices. Output devices are used to display the result processed by CPU to the users. Example. Watching a movie on computer, or result of a calculation, or even a printout is also an output. Example include, Monitor, Printer, Plotter, Speakers, etc.
Last comes the Storage devices. Computer data storage, often called storage or loosely referred to as memory, is used retain data in a digital format. The speed of storage devices is lot lesser than memory.
Other Computer Hardware
Computer case: The computer case is a plastic or metal cabinet that has slots and chassis for placing computer components.
Power supply: A power supply unit converts AC electric power to low-voltage DC power for the internal components of the computer.
Motherboard: The motherboard is a large rectangular board with integrated circuits that connects various computer hardware like CPU, RAM, CD, DVD, hard disk, and other peripherals.
Removable media: Example a USB flash drive or DVD can be called removable media. Over the years, PS2 and serial/parallel ports have been replaced by USB.
That’s all for the basis of computer hardware.
We have tried to be concise and elaborate at the same time. The topics can be dealt in details; but usually not much is asked in the bank exams from this section. The most common question asked is so-and-so device is an input or output device. Example: Scanner is what kind of device. Ans. Input Device.
Hope this gives us an insight on the topic.
All the best. Ciao!