Saturday, 28 February 2015

VVDN Pvt. Ltd

Experience:-
                Written Test:-Question was based on C, and Basic Electronics like question based on op-amp, zenor diode, transformer, northern theory, capacitor, BJT…conceptual concept.
They give three job field 1-Hardware,2-Software,3-VLSI
Technical question was based on our interest field.
I select hardware so they ask mainly hardware based question, but my some friends select software field so they ask more  ‘C’, some 8085 and electronics.

Technical 1:-
·         What is interrupt, types, and practical example in 8085.
·         How u can connect a 3v LED with 50v power supply.
·         what is relay, how u interface with BJT.
·         What is freewheel diode, and what is it’s use in any circuit.
·         Keypad interfacing.
·         Project.

Technical 2:-
·         What is virtual ground, and when this concept is failed.
·         By which mechanism resistor drop voltage.
·         To find transformer current.
·         Relation between Frequency and power.
·         MOSFET based question.
·         Have u seen inside ur desktop, which component is largest in size.

·         Transmission line based question.