i want syllabus for section engnieer and previous year question papers

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How WDM works in wireless system...as we say that it works in optical and signals transmitted in this are light signals...??

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Explain the STMi and how many type STMi are used in telecomunication.

2 Answers   TATA,

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if an IP host moves from one subnet to another it must change its IP address.why? Must the MAC address also change? why or why not?

1 Answers   HAL,

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How to identify how many states the ripple counter is having by looking at the figure as it can also have some invalid states?

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numerical on resolution of ADC.

0 Answers   ONGC,

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importance of defining tg or tf in selecting master and slave bts's?

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My present SMPS ( +12V, -12V outputs, 1Amp Rating ) was faulty.I donot have similar model however i have two + 12V SMPS available. Can i use both of these SMPS as a replacement to present SMPS by connecting one of SMPS in reverese polarity.

2 Answers  

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Explain what is angle and amplitude modulation? What is noise in modulation?

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Explain how to calculate knee point voltage? Describe its purpose for differential protection.

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Am naseem sabah..i applied for PE in BEL.if anybody having sample questions for written test in BEL,pls forward to my mail id ....nsm.sbh@gmail.com..plsssssssssssss

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There is a toy train that can make 10 musical sounds. It makes 2 musical sounds after being defective. What is the probability that same musical sound would be produced 5 times consecutively? ( 1 of _____) ?

2 Answers   TCS,

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