Tag: information technology

Quizzes (14) Questions (79)

Questions Related to information technology

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

Internet uses 

  1. Packet switching

  2. Circuit switching

  3. Telephone switching

  4. Telex switching
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Packet-switched describes the type of network in which relatively small units of data called packets 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

Desirable properties of a website are  

  1. a meaningful address

  2. Help and search facilities

  3. Links to related sites

  4. Features to allow users to give feedback
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

While a meaningful address and feedback features are helpful, help and search facilities are considered essential for usability, allowing users to navigate large amounts of content effectively.

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

The difficulty to recognize the speaker's voice over the telephone is due to poor quality of sound.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The bandwidth used to transmit telephone signals is very low , it is generally around $4 KHZ$ in range .So, the quality of audio signals is low , therefore make it difficult to recognize the speaker's voice .

In modern day technologies . the bandwidth of the audio signals is however increased to around $9 KHZ$

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

Government has divided the carrier frequency range from 30 Mhz to 60 Mhz between 20 stations which are independently beaming their signals. Which of the signals can be beamed by each of the stations :-

  1. Voice signals only

  2. Music signals and voice signals only

  3. TV Signals, Music Signals as well as voice signals

  4. Music signals only
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The frequency range provided is typically allocated for narrow-band communication, which is sufficient for voice signals but lacks the bandwidth required for high-fidelity music or video (TV) signals.

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

Channel selection is selection of ________  of a T.V. station.

  1. area

  2. range

  3. frequency

  4. channel
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
On a television, the signals are transmitted at different frequencies from a T.V station. Different band of frequencies is allocated to different channels wherever changing a channel in a T.V., we are actually selecting to different frequencies.
Multiple choice different modes of communication and their uses information technology communication systems physics

Depending upon the frequency of the ____________  emitted by remote control, a channel is selected, by the ________  sensor.

  1. infrared radiations,microwave

  2. X-rays, X-ray

  3. infrared radiations,infrared

  4. radio waves,infrared
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Remote control always use infrared light , as it will not penetrate through the walls of the room and also carry enough information for a required signal.

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

What is ISD in telephonic communication ? 

  1. Inter Subscriber Dialing

  2. Inter Secure Dialing

  3. International Subscriber Dialing

  4. Intercom Simple Dialing
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

ISD is International Subscriber Dialing . It is placing an international telephone call that is dialed directly by a telephone Subscriber , rather than by a telephone operator .

Calls are initiated by dialing the International call prefix for the originating  country ,followed by the country calling code for the  destination country , and finally the national telephone number of the destination.

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

 The remote control handset of T.V makes use of _________ of very low frequency.

  1. microwaves

  2. infrared radiations

  3. visible rays

  4. radio waves
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The infrared radiation of low frequency are used in remote control handset of T.V .The low powered infrared waves make sure the signals sent from your remote does not penetrate the walls and interfere with outside surroundings .