Telecom Engineering Quiz Telecom Engineering Quiz 44 Welcome to Shaheen Leader Academy We expect 100% result. Click on Start Button. Your time is Ended. Thanks Telecom Engineering Telecom Engineering Quiz 1 / 25 A heterodyne frequency changer is ;- Modulator Demodulator Mixer 2 / 25 Which is a coprocessor of 80386:- 80387 8089 8087 3 / 25 A reverse bias PN junction has almost _________ current:- Low No current High 4 / 25 Which register set of  80286 from the same  register set of 8086  processor :- BX AH,AL EL 5 / 25 FDM is based on orthogonality :- True False 6 / 25 What are the advantages of digital circuits :- Less noise all of them Less interference 7 / 25 Which thing is more dominant in making a fiber function as bidirectional optical amplifier;- cladding material core material pump source 8 / 25 In surface emitter LEDs , more advantage can be obtained by using:- dh structures bh structures qc structures 9 / 25 In AM modulation, when the modulation index increases transmitted power ;- Decrease Increase Constant 10 / 25 In a common emitter , unby passed resister provides __________ voltage feedback:- Current Positive Negative 11 / 25 How many types of multiport optical fiber couplers are available at present:- 3 2 1 4 12 / 25 An OR gate has six inputs. The number of input words in its truth table are:- 64 32 6 13 / 25 The most commonly used semiconductor is:- Germanium Silicon Carbon 14 / 25 The majority of the carriers in a p type semiconductors are;- Photons Neutrons Electrons Holes 15 / 25 How many bit  vector number is used in an interruot  cycle of 80386 :- 16 8 4 16 / 25 What is disadvantage of FM over AM;- Large bandwidth required High modulation power is needed Required high output power 17 / 25 How many bits  does DSP56000 processor have :- 8 24 16 18 / 25 White noise has ___________ variance :- Zero One Finite 19 / 25 The narrow line width obtained under the CW operation for quarter wavelength shifted DFB laser is;- 2 mhz 3 mhz 10 mhz 1 mhz 20 / 25 The Input of a NAND gate are connected together . The resulting circuit is:- OR gate AND gate NOT gate 21 / 25 What is the bit size of the program  counter  in MC68HC05:- 9 7 13 22 / 25 What does ISI stands for in Optical fiber communication;- Inter symbol size interference Invisible size interference Infrared size interference Inter shape size interference 23 / 25 Which processor has CISC architecture ;- atmel AVR Zilog Z80 24 / 25 The diode cladding pumped Erbium Praseodymium doped fuoride device operates at wavelength;- 4 micrometer 1.04 micrometer 2.6 micrometer around 3 micrometer 25 / 25 An amplifier is an electronic device that increases the voltage ;- False True Your score is Restart quiz Subscribe our Channel Here