Communications [GATE (Graduate Aptitude Test in Engineering) Electronics & CE (EC)]: Questions 45 - 49 of 153

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Question 45

Appeared in Year: 2013

Question MCQ▾

Following are the modulation/multiplexing techniques: (September)

1. AM

2. FM

3. CDMA

4. WDM

The correct sequence of carrier frequency in decreasing order is

Choices

Choice (4)Response

a.

4,3, 1,2

b.

4,3, 2,1

c.

3,4, 2,1

d.

1,2, 3,4

Edit

Question 46

Appeared in Year: 2013

Question MCQ▾

Which data communication method is used for sending data in both directions at the same time? (September)

Choices

Choice (4)Response

a.

Simplex

b.

Full duplex

c.

Super duplex

d.

Half duplex

Edit

Question 47

Appeared in Year: 2014

Question MCQ▾

Which of the following techniques are used to: (June)

1. Armstrong

2. Foster-Sealy Discriminator

3. Balanced Modulator

4. Reactance Modulator

Which one of the following is true?

Choices

Choice (4)Response

a.

1 and 2

b.

1 and 3

c.

1 and 4

d.

1,2 and 3

Edit

Question 48

Appeared in Year: 2013

Question MCQ▾

Demodulation is a process (September)

Choices

Choice (4)Response

a.

Of removing the sidebands

b.

Of filtering the carrier

c.

Similar to modulation

d.

Done at the transmitter

Edit

Question 49

Appeared in Year: 2013

Question MCQ▾

The highest data rate in fiber optic communication occurs in (September)

Choices

Choice (4)Response

a.

Co-axial cable

b.

Graded-index fiber

c.

Multimode fiber

d.

Single-mode fiber

Edit