Basic Telecom Objective Question TDM, FDM, PSTN - Part 2

Q.11 Find the odd statement out from the following set of statements as far as
         multiplexing is concerned?

A. Multiplexing is used in order to maximize the utilization of shared 
        communication medium.

       B. Multiplexing allows simultaneous transmission of multiple signals 
            across a single communication link

C. TDM, FDM, WDM and XDM are different type of multiplexing 
       techniques.

       D. The process of sharing the common medium (trunk)by sending 
             combine signal from several sources in a predetermined manner 
             is called multiplexing.

Q.12 Amongst statements given below are true as far as PDH goes, 
          which are they?

     A. In North American Multiplexing hierarchy multiplexers are 
          named e1/e2/e3/e4, e4 being the highest order multiplexer.

     B. In North American Multiplexing hierarchy multiplexers are named 
          t1/t2/t3/t4, t4 being the highest order multiplexer.

     C. In Europen Multiplexing hierarchy multiplexers are named e1/e2/e3/e4,
          e4 being the highest order multiplexer.

     D. In Europen Multiplexing hierarchy multiplexers are named t1/t2/t3/t4, t4 
          being the highest order multiplexer.

Q.13 Which amongst the below mentioned switch has following disadvantages 

         Expensive relays, noise due to chattering of relays, limited capacity due to grid.

     
     A. cross bar switch 
     B. strowger switch  
     C. time and space switch 
     D. manual switch  
     E. electronic switch

Q.14 In PSTN,A to D and D to A conversion takes place in ______________

A. etc

B. lic

C. ixc

D. lata

Q.15 When the telephone call is established, resources are reserved ___________

A. Within an exchange

B. on trunk

C. Within an exchange as well as on trunk

D. None

Q.16 __________Signal from exchange to subscriber indicates the progress of the call.

A. Information

B. Control

C. Address

D. Alerting 5.Supervisory

Q.17 In case of channel associated Signaling (CAS), _____

A. Voice and signaling information use the same path

B. Voice and signaling information use separate paths

Q.18 SS7 is ____switched network.

A. Circuit

B. packet

C. message

D. cell

Q.19__________signal is sent as a response to IAM signal in SS7 network.

A. ACM

B. IAM

C. ANM

D. Alert

Q.20 Which of the following equipment(S) is/are installed at customer premises in ISDN technology? Choose the most appropriate answer amongst the following.

A. NT1

B. NT2

C. NT1 and NT2

D. NT1 and NT2 and optionally TA

Answers for Basic Telecom questionnaires’:-  

Question Number	Correct Answer
10	C
11	C
12	A
13	A
14	B
15	C
16	A
17	A
18	B
19	A
20	D

Basic Telecom Objective Part - 1

Basic Telecom Objective type Qustions | PSTN - Network Topology Questions

Q 1.  One amongst the following is not a network technology. Find the option out.

A. PSTN 

B. ATM 

C. SONNET/SDH 

D. BSDN

E. DSL

Q 2. In USA telecom scenario every ixc (inter exchange carrier) puts up a _____ in lata (local transport area)

A.Trunk

B. POP 

C. LEC 

D. None

Q 3. Which of the following statement describes access network of PSTN in the most appropriate manner:-

A. Access Network Connects Access Node (edge of access network) to the individual subscriber.

B. Access Network Consists of trunk/toll exchanges.

C. Access Network is a combination of switching systems

D. Access Network consists of transmission systems connecting switching centers

 Q 4.Which of the following statement is most appropriate in the context of communication protocol?

A. Protocol has syntax, semantics and logical sequencing

B. Protocol consists of rules.

C. Protocol has logical sequencing

D. Protocol has prototypes

Q 5. IP addressing as well as routing based on IP address happens at ______ layer in TCP/IP protocol stack.

A. datalink

B. Transport

C. Application

D. Network

E. Presentation

Q.6 Which one from the following properties of the signal can be change?

A. Amplitude and frequency 

B. Frequency and phase 

C. amplitude and phase 

D. Amplitude, frequency as well as phase

Q.7 What is the equation for SNR?

A. SNR=10log10(Ps/Pn) 

B. SNR=10log2(Ps/Pn) 

C. SNR=2log10(Ps/Pn)

D. SNR=2log2(Ps/Pn)

Q.8 For a signal with frequency range of (0-3) KHZ, what is the minimum sampling frequency required to reproduce the signal according to the sampling theorem

A. 1.3 KHz 

B. 2.6 KHz 

C. 9 KHz 

D. 4.7Khz

Q.9 TV and Radio are entertainment media. Which of the following modulation techniques are used in radio transmission?

A. AM and FM  

B. AM and PM

C. FM and PM 

D. AM,FM and PM

Q.10 In the process of modulation which of the following cannot be digital signal at all

A. Input signal and output signal 

B. Input signal and carrier signal 

C. Output signal and carrier signal 

D. None of the above

Answers for Basic Telecom questionnaires’:-  

Question Number	Correct Answer
1	D
2	B
3	A
4	A
5	D
6	D
7	A
8	B
9	A
10	C

Basic Telecom Objective Question TDM, FDM, PSTN - Part 2