Computer and Information Technology part -4

Total Questions: 50

31. The device by which data are transferred by telephone with the help of binary signals is – [U.P.P.C.S. (Pre) 2002 , U.P.P.C.S. (Mains) 2007]

(a) Modem
(b) Analog
(c) Monitor
(d) O.C.R.

Correct Answer: (a) Modem

Solution:

Modem, short for Modulator/Demodulator, is a hardware device that allows a computer to send and receive information over telephone line by converting digital signal into an analog signal and analog into digital. Thus, modem perform modulation and its is required for sending and receiving data between computers around the world through telephone lines.

32. Which of the following performs, modulation and demodulation? [Chhattisgarh P.C.S. (Pre) 2019]

(a) Coaxial cable
(b) Fiber optic
(c) Modem
(d) Satellite

Correct Answer: (c) Modem

Solution:

Modem, short for Modulator/Demodulator, is a hardware device that allows a computer to send and receive information over telephone line by converting digital signal into an analog signal and analog into digital. Thus, modem perform modulation and demodulation, its required for sending and receiving data between computers around the world through telephone lines.

33. For sending and receiving data between computers around the world through telephone lines, we need: [U.P. Lower Sub. (Mains) 2015]

(a) FAX
(b) Modem
(c) Scanner
(d) Hub

Correct Answer: (b) Modem

Solution:

Modem, short for Modulator/Demodulator, is a hardware device that allows a computer to send and receive information over telephone line by converting digital signal into an analog signal and analog into digital. Thus, modem perform modulation and demodulation, its required for sending and receiving data between computers around the world through telephone lines.

34. Which system or arrangement connects microcomputer with telephone? [U.P. Lower Sub. (Pre) 2013]

(a) VDU
(b) MODEM
(c) UNIX
(d) All the above

Correct Answer: (b) MODEM

Solution:

Modem, short for Modulator/Demodulator, is a hardware device that allows a computer to send and receive information over telephone line by converting digital signal into an analog signal and analog into digital. Thus , modem perform modulation and its is required for sending and receiving data between computers around the world through telephone lines.

35. A modem converts: [M.P.P.C.S. (Pre) 2017]

(a) analog signals into digital signals
(b) digital signals into analog signals
(c) Both (A) and (B)
(d) None of the above

Correct Answer: (c) Both (A) and (B)

Solution:

MODEM stands for MOdulator- DEModulator. It's a device that converts digital signals from the computer into analog signals suitable for transmission over telephone lines (modulation) and vice versa (demodulation). This allows computers to communicate with each other or access the internet using the telephone network.

36. Such a device which converts data into impulses and transmits it through a terminal to a computer or computer to terminal over telephone line, it is: [U.P. Lower Sub. (Pre) 2013, U.P.U.D.A/L.D.A. (Pre) 2002]

(a) Magnetic disc
(b) Microcomputer
(c) CD Rom
(d) Modem

Correct Answer: (d) Modem

Solution:A modem is the device that performs this crucial conversion between the digital data of a computer and the analog signals that can be transmitted over a telephone line. It modulates the digital data into impulses for transmission and demodulates incoming impulses back into digital data that the computer can understand.

37. A modem is a hardware device that interfaces: [Uttarakhand Lower Sub. (Pre) 201 , Uttrakhand U.D.A/L.D.A. (Mains) 2006]

(a) CPU and CRT.
(b) Input and output devices.
(c) Printer and main memory.
(d) Telephone lines and computer equipment.

Correct Answer: (d) Telephone lines and computer equipment.

Solution:

38. The form of information signal used in sending fax and email is: [Jharkhand P.C.S. (Pre) 2021]

(a) Digital signal
(b) Analog and Digital signal both
(c) None of Analog and Digital signal
(d) Analog signal

Correct Answer: (b) Analog and Digital signal both

Solution:

The form of information signal used in sending fax and email through phone lines is both analog and digital signal.

39. _____ is the process by which the receiver interprets the symbols used by the source of the message. [M.P. P.C.S. (Pre) 2023]

(a) Listing
(b) Decoding
(c) Encoding
(d) Listening

Correct Answer: (b) Decoding

Solution:

Decoding is the process by which the receiver interprets the symbols used by the source of the message.

40. To increase the length of a network without loss of signal strength, we would use: [M.P.P.C.S. (Pre) 2008]

(a) Repeater
(b) Router
(c) Gateway
(d) Switch

Correct Answer: (a) Repeater

Solution:

The repeater is a networking component that extends the length of a network by amplifying the signal so that it can travel further along the cable without any loss.

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Computer and Information Technology part -4

31. The device by which data are transferred by telephone with the help of binary signals is – [U.P.P.C.S. (Pre) 2002 , U.P.P.C.S. (Mains) 2007]

32. Which of the following performs, modulation and demodulation? [Chhattisgarh P.C.S. (Pre) 2019]

33. For sending and receiving data between computers around the world through telephone lines, we need: [U.P. Lower Sub. (Mains) 2015]

34. Which system or arrangement connects microcomputer with telephone? [U.P. Lower Sub. (Pre) 2013]

35. A modem converts: [M.P.P.C.S. (Pre) 2017]

36. Such a device which converts data into impulses and transmits it through a terminal to a computer or computer to terminal over telephone line, it is: [U.P. Lower Sub. (Pre) 2013, U.P.U.D.A/L.D.A. (Pre) 2002]

37. A modem is a hardware device that interfaces: [Uttarakhand Lower Sub. (Pre) 201 , Uttrakhand U.D.A/L.D.A. (Mains) 2006]

38. The form of information signal used in sending fax and email is: [Jharkhand P.C.S. (Pre) 2021]

39. _____ is the process by which the receiver interprets the symbols used by the source of the message. [M.P. P.C.S. (Pre) 2023]

40. To increase the length of a network without loss of signal strength, we would use: [M.P.P.C.S. (Pre) 2008]

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