Explore topic-wise InterviewSolutions in Current Affairs.

(b) RJ-45 most commonly used to connect computers onto Ethernet-based local area network.

False 

Twisted pair cable has low bandwidth capabilities and broadband application requires high bandwidth.

Twisting the cables keep them close together so that, any external magnetic fields must cross both cable at the same time, so the interference created in one cable is cancelled by the almost exact opposite amount of interference in the other.

(c) All are communication channel but modem is a dev that convert analog signals to digital signals or vice-versa

A crossover cable is a special type of Ethernet cable specially designed for connecting two computers, whereas most Ethernet cables are designed to connect one computer to a router or a switch.

TWO problems that can occur during transmission of data are as follows: 

1. Crosstalk Disturbance caused by the electric or magnetic fields of one signal in an adjacent signal.

2. Attenuation During transmission, the signal strength is reduced this phenomenon is called attenuation.

1. Bandwidth It is the Communication capacity of a network. It refers to the data carrying capacity of a channel or medium. 

2. Broadband Broadband is a wide bandwidth data transmission with an ability to simultaneously transport multiple signals and traffic types

Barcode reader is a device which is used to read the printed code (barcode) from the products to be sold. It contains a light sensitive detector which identifies the values of the bars printed on the product and converts them into a numeric code. This barcode reader technology is used in shopping malls to identify products and generate bills.

Biometric sensor is a device used for recognising physical or behavioural traits of an individual. This device is mainly used for security purpose and for marking attendance of employees/students inorganisations/institutions. The major advantage of this device is that it eliminates the problem caused by lost IDs or forgotten passwords etc.

Differences between long distance and short distance wireless media are as follows:

The three main parts of optical fibre cable are as follows: 

1. Core It is the section through which the data travel in the form of light. 

2. Cladding The cladding is the covering part of core. Its function is to reflect back the light into the core, as it is a denser medium. 

3.  Protective Coating It is the outer cover of cladding for the protection of optical fibre from damage and moisture.

(b) Non-linear multimedia uses interactivity to control progress, e.g. video games.

Multimedia system consists of several media.

Correct answer is (c) dongles

Correct answer is (a) host

The functional units of a computer are as follows:

1. Input Unit Computer takes data from input devices. 

2. CPU (Central Processing Unit) It is the brain of the computer, where most of the calculations takes place. It consists of 

ALU (Arithmetic and Logic Unit) It performs arithmetical and logical operations. 

CU (Control Unit) It extracts instructions from memory, decodes and executes them. 

3. Output Unit Gives out results or data through output devices. 

4. Auxiliary Storage Secondary storage devices are used to store data and instructions permanently.

Various components of multimedia are described as follows: 

1. Text It is the most widely used and flexible means of representing information on screen and conveying ideas. It is not always a good idea to replace text with pictures or sounds, so designer should consider how to present text in an acceptable way and supplementing it with other media. 

2. Graphics Today visualisation has become an important part of the communication process and graphical images can be used to add emphasis, direct attention, illustrate concepts and provide a background for the content. 

3. Audio Audio is a very important element of multimedia application as it can enhance your multimedia application a number of ways. e.g. in delivering lectures over the Web music used to add interest and emotion to a presentation. 

4. Video Video provides a powerful impact in a multimedia program. In multimedia applications, now-a-days the digital video is becoming very much popular. These video clips can be edited easily and can be stored like any other computer file.

5. Animation Animation is a process of making a static image look like it is moving. In multimedia, now-a-days animation is being used as 2-D animation and 3-D animation.

True 

Multimedia is an integration of interactive media.

Bluetooth and Infrared both are short range wireless transmission media. This is the only point at which both these data transmission technologies look similar but there is a lot of difference between the two. Infrared is mostly used in TV remotes and there must be a direct line-of-sight between the transmitter and the receiver while on the other hand bluetooth uses a radio frequency which allows transmission through walls and other objects.

Correct answer is (b) 5 KM

Corrrect answer is (c) WLAN

Multimedia can be used in a variety of ways. Various application areas of multimedia are as follows: 

1. Creative Industries 

Creative industry refers to a range of economic activities which are concerned with the generation of knowledge and information. Advertising, architecture, art, crafts, design, fashion, film, music, publishing, toys, games etc., all comes under creative industries. In this area, multimedia is found to be very useful for representing information creatively. 

2. Entertainment 

In present time, multimedia is being heavily used for entertainment purpose. By the use of multimedia, special effects are being added in movies and animations. Multimedia games are becoming very popular among people and kids as their favourite time pass.

 3. Business 

In business, multimedia is being used in presentations, marketing, advertising, product demos, databases, catalogues, network etc. It is playing major role in making businesses and their products successful. Multimedia is also being widely used in training programs. 

4. Schools 

The most needy place for multimedia are schools. By using multimedia for explaining a concept, a live and working demonstration can be given to the students in the class itself, so that they can get into the concept and can retain it for longer period of time. Computer based training courses are being used so that students can get a topic anytime, anywhere without the help of the instructor. 

5. At Home 

Gardening, cooking, home designing, repairing some home appliances etc., are the areas where multimedia is being continuously used and becoming more popular everyday as a tool in home applications. 

6. Public Places 

In hotels, train stations, shopping malls, museums etc., multimedia can provide information and help to the consumers when no one is there to help them.

Bluetooth is a short range wireless connection.

Only short range communication is possible using bluetooth.

(a) Wireless Local Area Network

Text messages being sent over e-mail, it is also possible to attach a file or other data in , an email. For example, an attachment could be a picture, PDF,word processor document, or any file stored on the computer.

True 

Multimedia is a combination of several media like sound, hypertext, image and animation etc

(c) Multimedia is a interactive combination of text, animations, sounds, images etc.

True 

It is a short-range wireless connection. With the help of bluetooth, we can transfer the data from one device to another device.

Correct answer is (d) PAN

Correct answer is (b) CAN

Correct answer is (b) MAN

1. Efficient. 

2. Cost effective and convenient. 

3. Controlled by a single person.

4. Hotspot may connect upto 8 devices.

Correct answer is (c) WAN

(a) Writting e-mail content

Correct answer is (b) February

(a) Internet of Things

(d) Unlike human beings, a computer is free from monotony, tiredness, lack of concentration etc. and can work for hours without creating any errors. This characteristic of computer is known as diligence.

Correct answer is (a) dots

(a) Internet Corporation for Assigned Names and Numbers

(b) Malicious spyware

(a) Sandboxing

PAN: 

1. Personal Area Network, its ranges upto 100 meters. 

2. Speed upto 250 Kbps. 

3. Hotspot may connect upto 8 devices. 

CAN:

1. Campus Area Network, its range upto 5 km.

2. Speed upto 40 Kb/s to 1 MB/s. 

3. High Bandwdith Multi- departmental Network access.

A botnet is a group of computers connected to the Internet that have been compromised by a hacker using a computer virus or Trojan horse. An individual computer in the group is known as a “zombie” computer.

Correct answer is (a) static

A URL is an address that shows where a particular page can be found on the World Wide Web. URL is an abbreviation for ‘Uniform Resource Locator (URL)’.

(a) Uniform Resource Locator

Difference between a flash drive and a memory card are as follow

Spam in the security context is primarily used to describe e-mail spam. Unwanted messages in your e-mail inbox. Spam, or electronic junk mail, is a nuisance as it can clutter your mailbox as well as potentially take up space on your mail server. 

However, spam messages can contain links that when clicked on could go to a website that installs malicious software onto your computer.