Tag: communication systems

Quizzes (8) Questions (79)

Questions Related to communication systems

Multiple choice different modes of communication and their uses information technology communication systems physics

The width of a webpage is 768 pixels. An user designs a webpage with a width twice the actual width. Which component of the webpage can be used to view the full website

  1. Scroll bar

  2. Address bar

  3. Home button

  4. Stop button
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Scroll button can be used to view any website of variable width or height. The website can be even for 2 or 3 pages, scrolling down helps an user to view the page completely, just like turning the pages of a notebook

Multiple choice different modes of communication and their uses information technology communication systems physics

Which of the following is not a disadvantage of conducting focus groups online?

  1. Those who are fastest at typing may dominate the discussions.

  2. It is more difficult to establish rapport without non-verbal cues.

  3. Normally shy participants may find it easier to "speak" in this setting.

  4. It is easier for people exit the focus group online.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Virtual focus groups have some advantages, such as making it easier for shy or reticent people to participate in the relatively anonymous setting of an online discussion. However, the method also has numerous disadvantages that stem from this lack of face-to-face interaction: it is more difficult to build rapport online and so the researcher may find it harder to prevent people from dominating the discussions, ignoring questions or dropping out of the study altogether.

Multiple choice different modes of communication and their uses information technology communication systems physics

A local area network is 

  1. a collection of two or more connected computers sharing certain resources in a relatively small geographic location, often in the same building

  2. a collection of more than twenty connected computers sharing certain resources in a relatively small geographic location, often in the same building

  3. a collection of two or more connected computers sharing only system resources in a relatively small geographic location, often in the same building

  4. a collection of two or more connected computers sharing file storage space only in a relatively small geographic location, often in the same building
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A Local Area Network (LAN) is defined by its limited geographic scope, typically confined to a single building or campus, where computers are connected to share resources like files, printers, and internet access.

Multiple choice different modes of communication and their uses information technology communication systems physics

 In order to interpret XML documents one should

  1. Use standardized tags

  2. Have a document type definition which defines the tags

  3. Define the tags separately

  4. Specify tag filename
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A Document Type Definition (DTD) or an XML Schema is required to define the structure, elements, and attributes allowed in an XML document, enabling parsers to interpret the data correctly.

Multiple choice different modes of communication and their uses information technology communication systems physics

The packets of an internet message

  1. take a predetermined path

  2. take a path based on packet priority

  3. go along different paths based on path availability

  4. take the shortest path from source to destination
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

All data transfers across the Internet work on this principle. It helps networks manage traffic -- if one pathway becomes clogged with traffic, packets can go through a different route. This is different from the traditional phone system, which creates a dedicated circuit through a series of switches. All information through the old analog phone system would pass back and forth between a dedicated connection. If something happened to that connection, the call would end.

That's not the case with traffic across IP networks. If one connection should fail, data can travel across an alternate route. This works for individual networks and the Internet as a whole. For instance, even if a packet doesn't make it to the destination, the machine receiving the data can determine which packet is missing by referencing the other packets. It can send a message to the machine sending the data to send it again, creating redundancy. This all happens in the span of just a few milliseconds.

Multiple choice different modes of communication and their uses information technology communication systems physics

A wide area network is 

  1. a collection of two or more connected computers sharing certain resources in a relatively small geographic location, often in the same building

  2. a collection of two or more LANs sharing certain resources in a relatively small geographic location, often in the same building

  3. a collection of two or more LANs sharing certain resources in a relatively large geographic location, often in the same building

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A WAN consists of two or more LANs. The computers are farther apart and are linked by telephone lines or radio waves. Eg: Internet

Multiple choice different modes of communication and their uses information technology communication systems physics

Internet data is broken up as 

  1. fixed length packets

  2. variable length packets

  3. not packetized

  4. 64 bytes packets
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Information transmitted through internet is broken down in terms of small units of data called packets and are routed through a network based on the destination address contained within each packet. Breaking communication down into packets allows the same data path to be shared among many users in the network. This type of communication between sender and receiver is known as connectionless (rather than dedicated). Most traffic over the Internet uses packet switching and the Internet is basically a connectionless network.

Multiple choice different modes of communication and their uses information technology communication systems physics

T.V. Transmission requires _________ waves,which are not bounced by Ionosphere.

  1. low-frequency RF

  2. low-frequency carrier

  3. high-frequency carrier

  4. low-frequency audio
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

As the transmission of television is done through satellite's . So, the carrier waves should be of high frequency , so , the carrier waves should be of high frequency , so that they may clear the Ionosphere and provide a smooth transmission  between a satellite and television set