Embedded Systems Interview Questions
Questions Answers Views Company eMail

Difference between 80286 and 80287

Mascot,

2 8207

In a processor these are 120 instructions . Bits needed to impliment this instructions [a] 6 [b] 7 [c] 10 [d] none

Wipro,

2 8488

In 8085 microprocessor READY signal does.which of the following is incorrect statements [a]It is input to the microprocessor [b] It sequences the instructions

Wipro,

2 8114




Return address will be returned by function to

Wipro,

2 4575

load a mul a store t1 load b mul b store t2 mul t2 add t1 then the content in accumulator is

Wipro,

2 5994

In 8085 microprocessor READY signal does.which of the following is incorrect statements [a]It is input to the microprocessor [b] It sequences the instructions

Wipro,

4 7472

what is conductance and valence band?

1 4167

What is Fermi level?

5 5876

How does Vbe and Ic change with temperature?

Qualcomm,

2245

If the substrate doping concentration increase, or temperature increases, how will Vt change? it increase or decrease?

1 2102

what is Channel length modulation?

Intel,

2 2910

what is the doping?

5 4247

How does a pn junction works?

Wipro,

2 4518

What is the depletion region?

1 3620

Tell me the parameters as many as possible you know that used to character an amplifier?

1 1371







Un-Answered Questions { Embedded Systems }

What is Charge Sharing? Explain the Charge Sharing problem while sampling data from a Bus

8


In what way interrupts are classified in 8085?

13


You have three adjacent parallel metal lines. Two out of phase signals pass through the outer two metal lines. Draw the waveforms in the centre metal line due to interference. Now, draw the signals if the signals in outer metal lines are in phase with each other

9


Process technology? What package was used and how did you model the package/system? What parasitic effects were considered?

2028


Explain Basic Stuff related to Perl?

13






For an AND-OR implementation of a two input Mux, how do you test for Stuck-At-0 and Stuck-At-1 faults at the internal nodes? (You can expect a circuit with some redundant logic)

7


Draw the Differential Sense Amplifier and explain its working. Any idea how to size this circuit? (Consider Channel Length Modulation)

15


For a NMOS transistor acting as a pass transistor, say the gate is connected to VDD, give the output for a square pulse input going from 0 to VDD

13


Explain what is embedded system in a computer system?

7


Cross section of a PMOS transistor?

3519


Draw the Cross Section of an Inverter? Clearly show all the connections between M1 and poly, M1 and diffusion layers etc?

2215


Which interrupt is not level-sensitive in 8085?

7


Using four cascaded counters with a total of 8 bits, how many states must be deleted to achieve a modulus of 20,000?

11


What products have you designed which have entered high volume production?

1318


Draw a transistor level two input NAND gate. Explain its sizing (a) considering Vth (b) for equal rise and fall times

10