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Midterm Second Sem > ITEC102 > Flashcards

ITEC102 Flashcards

1
Q

The transfer of data or information from one location to another.

A

Data Communication

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2
Q

Elements of Data Communication

A
  • Sender
  • Reciever
  • Medium
  • Message
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3
Q

The computer or device that is used for sending the data from one location to other.

A

Sender or Transmitter

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4
Q

The computer or device that receives the data. It is also known as “sink”.

A

Reciever

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5
Q

The path or link through which data transferred from sender to receiver.

A

Medium

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6
Q

The data or information which is sent from sender to receiver.

A

Message

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7
Q

The path or link through which data is transferred from sender to receiver.

A

Medium

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8
Q

Categories of Data Communication Media

A
  • Guided Media
  • Unguided Media
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9
Q

The physical links through which signals are transferred. These are also called bounded media.

A

Guided Media

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10
Q

The logical links through which signals are transferred. These are the natural parts of environment that can be used to transfer signals in the form of waves.

A

Unguided Media

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11
Q

Data Communication Modes

A
  • Simplex Mode
  • Half Duplex Mode
  • Full Duplex Mode
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12
Q

The data is transmitted in only on direction. A terminal can only send data and cannot receive data or it can only receive data but cannot send it.

A

Simplex Mode

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13
Q

Data can be transmitted in both directions, but only in one direction at a time.

A

Half-Duplex Mode

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14
Q

Data can be transmitted in both directions at the same time

A

Full-Duplex Mode

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15
Q

The transfer of any kind of information from one location to another.

A

Data Transmission

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16
Q

Sending a stream of bits or bytes from one location to another via
transmission medium

A

Communication

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17
Q

Electric or electromagnetic representation of data.

A

Signal

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18
Q

Converts a message into a signal,
which is carried to a receiver by the communication channel.

A

Transmitter

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19
Q

2 Types of Signal

A
  • Analog Signal
  • Digital Signal
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20
Q

Are continuous electrical signals that vary with time & represented by a waveform.

A

Analog Signal

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21
Q

Waveform is characterized by 4 properties

A
  • Amplitude
  • Frequency
  • Wavelength
  • Phase
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22
Q

Non-continuous & they change in individual steps.

A

Digital Signal

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23
Q

Cause of Transmission Flaws

A
  • Noise
  • Attenuation
  • Latency
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24
Q

Unwanted signal which can disturb or harm the communication system.

A

Noise

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25
Q

Types of Noises

A
  • Thermal Noise
  • Induced Noise
  • Impulse Noise
  • Crosstalk
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26
Q

Measure of wavelength at any given point of time. (Measured in Volt [V])

A

Amplitude

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27
Q

Number of times waveform repeats itself in second. (Measured in Hertz[Hz].

A

Frequency

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28
Q

Distance between two corresponding points on a waveform. (Measured in Meter [m]).

A

Wavelength

29
Q

Progress of a wave over time in relationship to a fixed point or other wave with same frequency amplitude.

A

Phase

30
Q

Created by the movement/ collision of the electrons due to heat in a conductor (wire).

A

Thermal Noise

31
Q

Caused by varying magnetic field
originated from external circuit or equipment.

A

Induced Noise

32
Q

pulse(s) appearing at the output
point of a data line, which is not transmitted at the input point.

A

Impulse Noise

33
Q

It refers to signal affecting another
nearby signal.

A

Crosstalk

34
Q

How to eliminate noise?

A
  • Repeater
  • Amplifier
35
Q

Device that regenerates digital signal.

A

Repeater

36
Q

Device with amplify or regenerate analog signal.

A

Amplifier

37
Q

A signal sent via a transmission media, will lose a portion of its power in form of heat or other form of energy.

A

Attenuation

38
Q

Also known as delay, is an expression of how much time it takes for a packet of data to get from one designated point to another.

A

Latency

39
Q

It is the addition of information/signal to an electronic or optical signal carrier. A device that performs modulation is a modulator.

A

Modulation

40
Q

Modulation Methods

A
  • Amplitude Modulation (AM)
  • Frequency Modulation (FM)
  • Phase Modulation (PM)
41
Q

The amplitude of voltage applied to the carrier is varied over time.

A

Amplitude Modulation (AM)

42
Q

The frequency of the career waveform in varied in small but meaningful amounts.

A

Frequency Modulation (FM)

43
Q

The natural flow of the alternating current waveform is delayed temporarily.

A

Phase Modulation (PM)

44
Q

Transmitting multiple signals over a single communication line or computer channel.

A

Multiplexing

45
Q

2 Common Multiplexing Techniques

A
  • Frequency Division Multiplexing (FDM)
  • Time Division Multiplexing (TDM)
46
Q

It separates signals by modulating the data onto different carrier frequencies.

A

Frequency Division Multiplexing (FDM)

47
Q

It separates signals by interleaving bits one after the other.

A

Time Division Multiplexing (TDM)

48
Q

Types of Data Transmission

A
  • Serial Transmission
  • Parallel Transmission
49
Q

Transmission of several bits one after another through a single wire.

A

Serial Transmission

50
Q

Multiple wires are used for transmitting bits simultaneously.

A

Parallel Transmission

51
Q

3 Modes of Communication

A
  • Simplex
  • Half-Duplex
  • Full-Duplex
52
Q

2 Types of Transmission Modes

A
  • Asynchronous Transmission
  • Synchronous Transmission
53
Q

A technique widely used in personal computers to provide connectivity to printers, modems, fax machines etc.

A

Asynchronous Transmission

54
Q

Technique of transmission in which the transmitter & receiver are synchronized.

A

Synchronous Transmission

55
Q

XML stands for?

A

EXtensible Markup Language

56
Q

It is a set of rules that allow us to specify our own set of elements and attributes.

A

DTD

57
Q

DTD stands for?

A

Document Type Definition

58
Q

Serves same purpose as database schema.

A

XML Schema

59
Q

API used for database connectivity.

A

Java Database Connectivity (JDBC)

60
Q

JDBC stands for?

A

Java Database Connectivity

61
Q

API stands for?

A

Application Program Interface

62
Q

are stored as XML Type ( data type
for XML) in Oracle

A

XML Documents

63
Q

It provides basic services to manage set of JDBC drivers.

A

DriverManager

64
Q

It send queries to database server after a connection is set up.

A

Connection

65
Q

SQL Statements without parameters.

A

Statement

66
Q

SQL Statements to be executed multiple times with different parameters.

A

PreaparedStatement

67
Q

Used for stored procedures.

A

CallableStatement

68
Q

Basic Steps to Develop JDBC Application

A
  • Import JDBC classes
  • Load JDBC drivers
  • Connect and interact with database
  • Disconnect from database

Midterm Second Sem (4 decks)

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