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Hardware And Software Design Interview Questions

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RISC-Means Reduced Instruction Set Computer.a Risc system has reduced number of instructions and more importantly it is load store architecture were pipelining can be implemented easily.Eg.ATMEL AVR.

CISC-Means Complex instruction set architecure.A CISC system has complex instructions such as direct addition between data in two memory locations.Eg.8085. 

I am writing for Microcontrollers. ldi r16,$F0 ldi r17,$08 ldi r18,$00 ldi r19,$00 loop: rol r16 back: brcs one inc r19 dec r17 brne loop end:rjmp end one:inc r18 rjmp back

int count1s =0;

while(num != 0){

     if(num & 1 == 1)

     { count1s++; }

     num= num>>1;


printf("%d", count1s); 

Generally for integer memory is 2 bytes for character is 1 byte

char * and int * are pointers. they point to a memory location hence there size is the same, which is the size of the address space. 

It searches through local DNS cache, if nothing is there, it queries the ISP?s DNS server. 

A Turing machine is a theoretical computing machine invented by Alan Turing (1937) to serve as an idealized model for mathematical calculation. A Turing machine consists of a line of cells known as a "tape" that can be moved back and forth, an active element known as the "head" that possesses a property known as "state" and that can change the property known as "color" of the active cell underneath it, and a set of instructions for how the head should modify the active cell and move the tape. At each step, the machine may modify the color of the active cell, change the state of the head, and then move the tape one unit to the left or right. 

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