Thursday, 20 October 2011

Frequently Asked microcontroller Interview questions

1. What are the flags in 8086? - In 8086 Carry flag, Parity flag, Auxiliary carry flag, Zero flag, Overflow flag, Trace flag, Interrupt flag, Direction flag, and Sign flag. 2. What are the various interrupts in 8086? - Maskable interrupts, Non-Maskable interrupts. 3. What is meant by Maskable interrupts? - An interrupt that can be turned off by the programmer is known as Maskable interrupt. 4. What is Non-Maskable interrupts? - An interrupt which can be never be turned off (ie.disabled) is known as Non-Maskable interrupt. 5. Which interrupts are generally used for critical events? - Non-Maskable interrupts are used in critical events. Such as Power failure, Emergency, Shut off etc., 6. Give examples for Maskable interrupts? - RST 7.5, RST6.5, RST5.5 are Maskable interrupts 7. Give...

Written Interview Apptitude Questions

1.Three types of tea the a,b,c costs Rs. 95/kg,100/kg and70/kg respectively. How many kgs of each should be blended to produce 100 kg of mixture worth Rs.90/kg, given that the quntities of band c are equal a)70,15,15 b)50,25,25 c)60,20,20 d)40,30,30 Ans: (b) 2.What is the maximum number of half-pint bottles of cream that can be filled with a 4-gallon can of cream (2 pt. =1 qt. and 4 qt. =1 gal) A.16 B.24 C.30 D.64 Ans: D 3.There are two circles, one circle is inscribed and another circle is circumscribed over a square. What is the ratio of area of inner to outer circle? Ans: 1 : 2 4.In the following figure: A B C D E F G H I Each of the digits 1, 2, 3, 4, 5, 6, 7, 8, and 9 is: a)Represented by a different letter in the figure above. b) Positioned in the figure...

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