Raliway Requirement Board (RRB)

RRB announce vacancies for  following posts for more than 18000 posts across India.

Filling up online form start on  26/12/2015 to 25/01/2016 only through below link

RRB

All are nontechnical posts.

1. Commercial Apprentice (CA) - 703 Posts
2. Traffic Apprentice (TA)- 1645 Posts
3. Enquiry cum reservation clerk (ECRC) -127 Posts
4. Goods Guard - 7591 Posts
5. Junior Account Assistant cum typist (JAA) - 1205 Posts
6. Senior clerk cum typist (SCT) - 869 Posts
7. Assistance Station Master (ASM) - 5942 Posts 
8. Traffic Assistance (TA) - 166 Posts
9. Senior Time Keeper (STK)- 04 Posts

Education details - Any graduates can apply .(T&C apply)

Exam details:

• Exam is objective paper 
• 100 Questions 
• 90 minutes
• 1/3 negative marks

General Knowledge

• Current Affairs  india and international 
• World general science 
• Indian economy 
• Indian culture
• Science technology

Arithmetic Ability 

• Percentage
• Time & Work
• Boats & Steams
• Time & Distance
• Interest 
• Profit & Loss
• Averages
• Problems on Age

General Intelligence 

• Analogies
• Similarities 
• Problem solving
• Relationship concepts
• Decision making
• Judgement 
• Visual memory discrimination 

General Science 

• Physics
• Environmental Studies
• Chemistry
• Biology

LiFi technology

What is LiFi ?

LiFi is a wireless optical networking technology that uses light emitting diodes (LEDs) for data  transmission.

LiFi is designed to use LED light bulbs similar to those currently in use in many energy conscious homes and offices. However , LiFi bulbs are outfitted with chip that modulates the light imperceptibly for optical data transmission . LiFi data is transmitted by the LED bulbs and received by photoreceptors.


LiFi early developmental models were capable of 150 Mbps. Some commercial kits enabling that speed have been released . In the lab with stronger LEDs and different technology , researchers have enabled 10 gigabits per second which is faster than 802.11ad.