10973890
Descrição
Quiz por Faheem Ahmed, atualizado more than 1 year ago
|
Criado por Faheem Ahmed
mais de 6 anos atrás
|
|
Questão 1
Questão
In 8085 microprocessor, the value of the most significant bit of the result following the execution of any arithmetic or Boolean instruction is stored in the
Responda
-
carry flag
-
auxiliary carry flag
-
sign flag
-
zero flag
Questão 2
Questão
How many bytes in a double word ?
Responda
-
1 byte
-
2 bytes
-
3 bytes
-
4 bytes
Questão 3
Questão
What is the value of AX register after executing,
MOV AX,456h,
CMP AX,456h
Responda
-
456h
-
Zero
-
UnKnown
-
400h
Questão 4
Questão
The instruction AND AH,11110111 is equivalent to
Responda
-
Sub AH, 8, if 4th bit of AH is set
-
Sub AH, 8, if 4th bit of AH is cleared
-
Sub AH, 4, if 4th bit of AH is set
-
None of the above
Questão 5
Questão
The debug command U
Responda
-
Retrieve the assembly program instructions from the disk
-
Retrieve the assembly program instructions from the RAM
-
Convert the machine code stored in memory into assembly equivalent
-
None of the above
Questão 6
Questão
The debug command: -E F000:0 1 2 3
Responda
-
Has no effect, because that location in ROM
-
Will write three bytes (1,2,3) starting at location F000:0
-
Depends on the processor
-
Invalid command
Questão 7
Questão
Consider the program segment:
Age DB 100
MOV Age,123
What is the memory-addressing mode of the first operand in the MOV instruction?
Responda
-
Immediate addressing mode
-
Direct addressing mode
-
Indirect addressing mode
-
Implied addressing
Questão 8
Questão
The multiple Segment:Offset representations for a unique physical address is:
Responda
-
Advantage for 8086 processor to provide flexibility
-
Disadvantage for 8086 processor, it make it harder to program
-
Has no effect.
Questão 9
Questão
Algorithms are designed using combinations of three main building blocks (control structures), called...
Responda
-
loops, if/then/else statements and functions
-
quark, strangeness and charm
-
syntax, choice and loops
-
sequence, selection and repetition
Questão 10
Questão
Pseudocode...
Responda
-
is written with specialised editing software
-
cannot describe if...then...else constructs
-
provides a pictorial representation of an algorithm
-
has features of both English and computer languages
Questão 11
Questão
In an 8085 microprocessor, the instruction CMP B has been executed while the content of the accumulator is less than that of register B. As a result
Responda
-
Carry flag will be set but zero flag will be reset.
-
Carry flag will be reset but zero flag will be set.
-
Both Carry flag and zero flag will be reset.
-
Both Carry flag and zero flag will be set.
Questão 12
Questão
Consider the sequence of 8085 instructions given below:
LXI H, 9258
MOV A, M
CMA
MOV M, A
which one of the following is performed by this sequence?
Responda
-
Contents of location 9258 are moved to the accumulator.
-
Contents of location 9258 are compared with the contents of accumulator
-
Contents of location 9258 are complemented and stored in location 9258
-
Contents of location 5892 are complemented and stored in location 5892
Questão 13
Questão
The 2' s complement representation of the decimal value (minus) - 15 is
Responda
-
1111
-
11111
-
111111
-
10001
Questão 14
Questão
The instruction, MOV AX, 1234H is an example of
Responda
-
Register addressing mode
-
Direct addressing mode
-
Immediate addressing mode
-
Based indexed addressing mode
Questão 15
Questão
Match the following:
1. A Push Instruction a. Pre Increment the SP
2. A Pop Instruction. b. Post Increment the SP
c. Pre Decrement the SP
d. Post Decrement the SP.
Responda
-
1-> a, 2 -> b
-
1->b, 2 -> c
-
1-> c, 2 -> d
-
1-> d, 2->a
Questão 16
Questão
In 8085, which of the following modifies the program counter ?
Responda
-
Only PCHL instruction
-
Only ADD instructions
-
Only JMP and CALL instructions
-
All instructions
Questão 17
Questão
The instruction that is used as prefix to an instruction to execute it repeatedly until the CX register becomes zero is
Responda
-
SCAS
-
REP
-
CMPS
-
STOS
Questão 18
Questão
In 8086 microprocessor one of the following statements is NOT true.
Responda
-
Coprocessor is interfaced in MAX mode
-
Coprocessor is interfaced in MIN mode
-
I/O can be interfaced in MAX / MIN mode
-
Supports pipelining
Questão 19
Questão
The status flag that cannot be operated by direct instruction is
Responda
-
Cy
-
Z
-
P
-
AC
-
S
Questão 20
Questão
Interfacing devices for DMA controller, programmable interval timer are respectively
Responda
-
8257, 8253
-
8253, 8257
-
8257,8251
-
8251,8257
Questão 21
Questão
Which of the following are the three basic sections of a microprocessor unit?
Responda
-
operand, register, and arithmetic/logic unit (ALU)
-
control and timing, register, and arithmetic/logic unit (ALU)
-
control and timing, register, and memory
-
arithmetic/logic unit (ALU), memory, and input/output
Questão 22
Questão
The instruction, MOV AX, [BX] is an example of
Responda
-
direct addressing mode
-
register addressing mode
-
register relative addressing mode
-
register indirect addressing mode
Questão 23
Questão
Which of the following instruction is NOT valid?
Responda
-
MOV AX, BX
-
MOV DS, 5000H
-
MOV AX, 5000H
-
PUSH AX
Questão 24
Questão
The instruction that is used for finding out the codes in case of code conversion problems is
Responda
-
XCHG
-
XLAT
-
XOR
-
JCXZ
Questão 25
Questão
The instruction that performs logical AND operation and the result of the operation is not available is
Responda
-
AAA
-
AND
-
TEST
-
XOR
Questão 26
Questão
The instruction that is NOT valid is
Responda
-
MOV AX, [BX]
-
MOV AX, 5555H
-
MOV AX, [SI]
-
MOV [SI], [DI]
Questão 27
Questão
In 8086 microprocessor, the stack segment may have a memory block of a maximum of
Responda
-
32K bytes
-
64K bytes
-
16K bytes
-
8K bytes
-
Unlimited bytes.
Questão 28
Questão
In 8086 the overflow flag is set when______.
Responda
-
The sum is more than 16 bit
-
Carry and sign flags are set
-
Signed numbers go out of their range after an arithmetic operation
-
During subtraction
Questão 29
Questão
Direction flag is used with ____.
Responda
-
String instructions
-
Arithmetic Instructions
-
Stack Instructions
-
Branch Instructions
Questão 30
Questão
If_________ flag is set; the processor enters the single step execution mode.
Responda
-
Direction
-
Trap
-
Interrupt
-
Zero
Questão 31
Questão
If segment address = 1005 H, offset address = 5555 H, then the physical address is_____.
Responda
-
6555A H
-
155A5 H
-
45500 H
-
56555 H
Questão 32
Questão
BHE of 8086 microprocessor signal is used to interface the_____
Responda
-
I/O
-
DMA
-
Even bank memory
-
Odd bank memory
Quer criar seus próprios Quizzes gratuitos com a GoConqr? Saiba mais.