The address range to which input will respond, is

1.  0000 H to FFFF H

2.  0000 H to 5FFF H

3.  4000 H to 5FFF H

4.  3000 H to  FFFF H

View Answer  
4
Correct Answer :

0000 H to 5FFF H


Explanation :
No Explanation available for this question

Following instructor has been executed by an 8085 microprocessor: From which address will the next instruction be fetched

1.  6019

2.  0379

3.  6079

4.  None of these

View Answer  
4
Correct Answer :

0379


Explanation :
No Explanation available for this question

A stack is a/an

1.  8-bit register in the microprocessor

2.  16- bit register in the microprocessor

3.  Set of memory locations in the R/W memory reserved for storing information temporarily

4.  16-bit memory stored in the h program counter

View Answer  
4
Correct Answer :

Set of memory locations in the R/W memory reserved for storing information temporarily


Explanation :
No Explanation available for this question

Consider the following 8085 assemble program This program will display

1.  Bytes from 51h to 82H at PORT2

2.  OOH AT PORT1

3.  All bytes at PORT1

4.  Bytes from 52H at 81H at PORT2

View Answer  
4
Correct Answer :

Bytes from 51h to 82H at PORT2


Explanation :
No Explanation available for this question

The output Y in the circuit below is always “1” when

1.   Two or more of the inputs P, Q, R are “0”

2.  Two or more of the inputs P, Q, R are “1”

3.  Any odd number of the inputs P, Q, R is “0”

4.  Any odd number of the inputs P, Q, R is “1

View Answer  
4
Correct Answer :

Two or more of the inputs P, Q, R are “1”


Explanation :
No Explanation available for this question

A bulb in a staircase has two switches one switch being at the groung floor and the other one at the first floor. The bulb can be turned ON and also can be turned OFF by any one of the switches irrespective of the state of the other switch. The logic of switching of the bulb resembles

1.   An AND gate

2.  An OR gate

3.  An XOR gate

4.  A NAND gate

View Answer  
4
Correct Answer :

An XOR gate


Explanation :
No Explanation available for this question

It is desirable to multiply the number of OAH by OBH and store the result in accumulator. The numbers available in the registers B and C are respectively. A part of the 8085 program for this purpose is given below. The sequence of instructions to complete the programme would be

1.  

2.  

3.  

4.  

View Answer  
4
Correct Answer :


Explanation :
No Explanation available for this question

Consider the following assembly language program: The execution of the above program in an 8085 will result in an

1.  Output of 87H at PORT1

2.  Output of 87H at PORT2

3.  Infinite looping of the program execution with accumulator data remaining at 00H

4.  Infinite looping of the program execution with accumulator data alternating between 00H and 87H

View Answer  
4
Correct Answer :

Output of 87H at PORT2


Explanation :
No Explanation available for this question

If the content of memory location 4A00H, 4A01H and 4A02H are respectively A7H, 98H and 47H, then after execution of program contents of memory location 4A02H will be respectively

1.  A7H

2.  98H

3.  47H

4.  None of these

View Answer  
4
Correct Answer :

A7H


Explanation :
No Explanation available for this question

. For the digital block shown in Figure. 2(a), the output Y=f(S3, S2, S1, S0) where S3 is MSB and S0 is LSB. Y is given in terms of miniterms as Y=Σm(1, 5, 6, 7, 11, 12, 13, 15) and its complements Y=Σm(0, 2, 3, 4, 8, 9, 10, 14) a. Enter the logical values in the given Karnaugh map [figure 2(b)] for the output Y b. Write down the expression for Y in sum0of-products from using minimum number of terms c. Draw the circuit for the digital logic boxes using four 2-input  NAND gates only for each of the boxes

1.  1 1

2.  

3.  

View Answer  
3
Correct Answer :


Explanation :
No Explanation available for this question
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