Placement Papers - NTPC

NTPC Interview Paper Pattern
  
 
   First 120 question on technical and 50  questions on general aptitude.
  1/3 negative marks for all the questions.
  2 hours exam.(No calculator allowed)
  Question paper along with the key sheet should be handed over to the  invigilator after the end of exam. 
   About  the Technical:     
  questions about diac,triac,buck effect  etc.
  Control systems,synchros,all basics and theoretical  
  computer NETWORKS: (abt  CSMA/CD,bridges,routers,Ieee standards like 802.3,etc.(abt ethernet))  
  VLSI (CMOS structure, functioning,)
    
   DIGITAL ELECTRONICS    
  (gates,negative logic,postive logic,nand,counters,etc.)
  Sample question:write a particular number in BCD,or hex equivalent etc.)
  cominational circuit design(no of gates required etc.)  
   Electronics:  
  led bias,tunnel diode bias,fet,bjt,feedback amplifier properties,optoelectronic devices,class  c amplifiers,multivibrators,band gaps in Si,Ge.,intrinsic concentration etc.  
   General:    
      Abt ozone layer depletion (CFCs) The total efficeincy of a thermal plant.  
   Communications:
      Amplitude modulation,FM Vs. AM.  
   Antennas :   
     Director,reflector in yagi uda,microwave frequency ranges,bands, ground wave,sky wave,space wave  propagation.
 
  In which media em waves travel  faster.  
  Microprocessor 8085,interrupt  structure,architecture,memories,mapping  schemes,8255,interrupt  controller(8259)(ICW1,OCW etc.) hard disk,floppy disk access times  
   Mangement Science:
      abc analysis(inventory management)
 
       Signals systems:    
      fourier transfor,sinc functions,convolution  
   Network theory:    
      resonant frequency formulae  
   OP AMPS:    
      a/d d/a converters,differentiators and integrators,instrumentationamplifiers.  
   Digital communications:  
     fdm, tdm I almost covered 95% of the topics.This  is as far as I could remember.  
   About aptitude:
      synonyms antonyms comprehension passages aptitude problem solving skills(train probs,loss profit sums,ratios,etc.)  word analogies fill in the sentences with the most suitable word type of questions.