Question Discussion & Solution

Input Devices:

• Input devices are the component of the computer system that accepts incoming data and instructions.
• It converts them into a pattern of electrical signals in binary code that is understandable to a digital computer.

Output Devices:

• Output devices are the component of a computer system that converts the digitized signals into a form understandable to the user.
• The output devices are generally known as the reverse of input devices.
• Output devices also send data from one computer system to another.

Key Points

•  A Visual Display Unit (VDU) is also referred to as a Monitor and VDU (video display unit), a monitor is an output device that displays video images and text.
• A printer is an external hardware output device that takes the electronic data stored on a computer or other device and generates a hard copy.
• A floppy disk is a type of disk storage composed of a disk of thin and flexible magnetic storage medium, sealed in a rectangular plastic enclosure lined with fabric that removes dust particles. It can be both an input and output device.​

Important Points

The Central Processing Unit (CPU):

• The CPU is the brain of the computer.
• Sometimes referred to simply as the processor or central processor, the CPU is where most calculations take place.
• The CPU executes the programs and controls the operation of all the hardware.
• A central processing unit (CPU), also called a central processor, main processor, or just processor is the electronic circuitry that executes instructions comprising a computer program.
• The CPU performs basic arithmetic, logic, controlling, and input/output (I/O) operations specified by the instructions in the program.

​Thus, CPU is not a computer output device.

Mistake Points

• The question is "Which one is not a computer output device?"
• Floppy is both input and output.
• CPU is the only option that is not an output device.

Additional Information

The basic difference between Input and Output devices:

The correct answer is Tecomella Stenosis.

• Tecomella Stenosis is the scientific name of the state flower-Rohira of Rajasthan.

Key Points

• Rohira is the state flower of Rajasthan.
• Its scientific name is Tecomella Stenosis.
• The flower is mainly found in desert and barren areas of the Thar Desert, Rajasthan.

Additional Information

• Lilium is the scientific name of lily flower.
• Helianthus is the scientific name of sunflower.
• Psidium Guajava is the scientific name of Guava.

The correct answer is Application software.

Key Points

• Spreadsheets, photo editing, PowerPoint, word documents, etc, are examples of Application software.
  • Application software, or app for short, is software that performs specific tasks for an end-user.
  • Effectively, if the user is interacting directly with a piece of software it is application software.
    • For example, Microsoft Word or Excel is application software, as are common web browsers such as Firefox or Google Chrome.
  • It also includes the category of mobile apps, including communication apps such as WhatsApp or games such as Candy Crush Saga.

Additional Information

• System Software
  • System software is a type of computer program that is designed to run a computer's hardware and application programs.
  • If we think of the computer system as a layered model, the system software is the interface between the hardware and user applications.
  • The operating system is the best-known example of system software.
  • The OS manages all the other programs on a computer.
  • System software is used to manage the computer itself.
    • It runs in the background, maintaining the computer's basic functions so users can run higher-level application software to perform certain tasks.
    • Essentially, system software provides a platform for application software to be run on top of.
• System software generally includes the following features:
  • High speed
    • System software must be as efficient as possible to provide an effective platform for higher-level software in the computer system.
  • Hard to manipulate
    • It often requires the use of a programming language, which is more difficult to use than a more intuitive user interface (UI).
  • Written in a low-level computer language
    • System software must be written in a computer language the central processing unit (CPU) and other computer hardware can read.
  • Close to the system
    • It connects directly to the hardware that enables the computer to run.
  • Versatile
    • System software must communicate with both the specialized hardware it runs on and the higher-level application software that is usually hardware-agnostic and often has no direct connection to the hardware it runs on. 
• The platform is hardware and software architecture that acts as a foundation or base upon which other applications, processes, or technologies are developed.
  • In computing, platform refers to basic hardware i.e., computer system, and software i.e., the operating system on which software applications are often run. 

Concept:

• Social evils or social issues are referred to any undesirable condition that is opposed by society or by a section of society.
• Some major issues are the caste system, poverty, dowry system, child labour, religious conflicts, etc.

Explanation:

Child labour:

• Child labour refers to the exploitation of children through any form of work that deprives children of their childhood.
• Any activity that interferes with their ability to attend regular school, and is mentally, physically, socially and morally harmful.
• Child Labour (Prohibition and Regulation) Act was enacted by the Ministry of Law and Justice on 30th July 2016.
• This Act amended the Child Labour (Prohibition and Regulation) Act, 1986.
• According to this Act:
  • No child shall be employed or permitted to work in any occupation or process.
  • Criteria of a child - A person below the age of 14 yrs.
• Although these laws do not consider all work by children as child labour.
• Exceptions include work by child artists, family duties and supervised training.
• Child labour is more prevalent in the cities where the standard of living is high and children have to work to support their families.

Dowry System:

• Dowry, or the custom of accepting gifts by the bridegroom’s parents from to bride’s parents as part of a marriage settlement.
• Dowry is the money, valuables, goods, estate or property which the bride party gives to the groom's party in exchange for marriage.
• The Dowry system is most prevalent in village areas where people are uneducated and a girl is considered as a burden on their family.
• With upcoming times, this practice is not that common in urban areas.
• To prevent the system of dowry, The Dowry Prohibition Act, 1961 was enacted.

Important Points

• Both child labour and the dowry system are social evils.
• They both are punishable offences.

Thus, 

Dowry and child labour are punishable offences: Correct

Dowry and child labour are necessary evils: Incorrect

Dowry and child labour are common in the villages: Incorrect

Dowry and child labour are common in cities: Incorrect

The least possible diagram from the given statements is shown below:

Conclusion I: Some black are red → False (It is a possible case but not a definite case)

Conclusion II: Some blue are red → True (It is a definite case)

Hence, only conclusion II follows.