RRB JE GK Questions 2026

An interpreter reads one statement of the source program, translates it and executes it immediately before moving to the next, so it stops at the first error it meets and tells the programmer about that error alone; this makes it convenient for learning and for testing small pieces of code…

The command javac is the Java compiler: it takes a source file with the extension.java, checks its grammar and converts it into a class file containing bytecode, the intermediate code that any Java Virtual Machine can run.

He created C at Bell Laboratories in the early 1970s and used it to rewrite the UNIX operating system, which is why C is called the mother of system programming languages and still underlies most operating systems.

Its name is short for Formula Translation, it was developed by a team under John Backus at IBM and released in 1957, and it was the first language in which a programmer could write ordinary algebraic formulas instead of machine codes, which is why it is counted as the first…

LHB stands for Linke Hofmann Busch, the German firm whose design Indian Railways adopted at the end of the 1990s and now builds at Kapurthala and other coach factories.

The Chenab bridge on that link stands about 359 metres above the bed of the river, higher than the Eiffel Tower, and is built as a steel arch to span the deep gorge in an earthquake prone and wind swept setting.

The correct answer is A, Gatimaan Express, which began running in 2016 between Delhi and Agra and became India's first semi-high-speed train at 160 kilometres an hour, a speed the Agra route could take because of its straight alignment and fenced sections.

The correct answer is B, the National High Speed Rail Corporation Limited, a company set up specifically to build and later operate high-speed rail in India, with the Union Government and the Governments of Gujarat and Maharashtra as shareholders.

The corridor uses the Shinkansen system, the high-speed technology Japan has run since 1964, and the project is financed largely by a soft loan from Japan carrying a long repayment period and a low rate of interest.

A Vande Bharat rake is a self-propelled electric multiple unit: the traction motors and control equipment are slung under the coaches themselves, so power is spread along the length of the train instead of being concentrated in one vehicle.

The first Vande Bharat Express was flagged off on 15 February 2019, after the train set had been built at the Integral Coach Factory under the name Train 18 and tested on Indian track.

The correct answer is B, the Integral Coach Factory at Chennai, which designed the train set under the project name Train 18 and rolled out the first rake.

Kavach works on the movement of trains: it reads the position and speed of a locomotive from trackside tags, compares that with the signal and the permitted speed, and brakes the train when the driver does not.

Safety Integrity Level is a scale of four grades used for safety related electronic systems, and level four is the most demanding, meaning the probability of a dangerous undetected failure is designed to be the lowest of all.

It is the research, design and standards wing of Indian Railways, has its headquarters at Lucknow, and developed Kavach in partnership with Indian manufacturers, first under the name Train Collision Avoidance System.

Kavach is an electronic safety system that acts on a moving train when its driver does not: it applies the brakes if a signal at danger is being approached without braking, holds a train back from passing a red signal, and keeps two locomotives fitted with the system from closing…

Teflon is the trade name of polytetrafluoroethylene, a polymer whose surface is one of the most slippery among solids, with a coefficient of friction of about 0.04.

Fires are sorted into classes by what is burning, and a fire fed by flammable liquids such as petrol, diesel, kerosene, oil, paint or thinner is a class B fire.

In a class 3 lever the fulcrum is at one end, the effort is applied in the middle and the load sits at the far end.

Water has a specific heat capacity of about 4186 joule per kilogram per kelvin, not 1200, so this pair is the wrong one.