Question Discussion & Solution

The correct answer is Microphone.

• ​A microphone is an input device, which is used to save a person's voice on a computer.

Key Points

• Microphone
  • The microphone is a device connected to a computer (via an audio interface or another analog-to-digital converter).
  • It sends/inputs information into the computer.
  • This means microphones are input devices.

​Additional Information

• Speaker
  • Speakers are one of the most common output devices.
  • The purpose of speakers is to produce audio output that can be heard by the listener.
• Scanner
  • ​A scanner is an input device that scans documents such as photographs and pages of text.
  • When a document is scanned, it is converted into a digital format. 
• Joystick
  • ​A joystick is an input device.
  • It can be used for controlling the movement of the cursor or a pointer in a computer device.

The pattern is:

And the number between the alphabets is the sum of position of alphabets in the general alphabetic series.

A + N = 1 + 14 = 15

I + V = 9 + 22 = 31

Q + D = 17 + 4 = 21

Y + L = 25 + 12 = 37

G + T = 7 + 20 = 27

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. 

The pattern is:

31

31 × 2 + 1 = 63;

63 × 2 - 2 = 124;

124 × 2 + 3 = 251;

251 × 2 - 4 = 498

Hence, the answer is '498'.

Concept:

In general, each object contains three object associated attributes:

• Object prototype: It is kind of reference/indication to another object from which properties are inherited.
• Object class: It is a kind of string which classifies the type an object.
• Object's extensible flag: It simply specifies that whether some new properties are added to the object