133 + Mcqs in 8085 Microprocessors Page 3 McqOptions

101.	In the peripheral mapped I/O, can an I/O port and an O/P port have the same port address?
A.	Yes
B.	Data insufficient
C.	No
D.	Depends on the peripheral
Answer» B. Data insufficient

Discussion

102.	Assume that memory location 2075 H has a data byte 47 H. Specify the contents of the address bus A
A.	2075 H and 47 H
B.	20 H and 47 H
C.	47 H and 2075 H
D.	75 H and 47 H
Answer» C. 47 H and 2075 H

Discussion

103.	If the clock frequency is 5 MHz, how much time is required to execute an instruction of 18 T-states?
A.	18 m sec
B.	90 m sec
C.	3.6 m sec
D.	Data insufficient
Answer» D. Data insufficient

Discussion

104.	If the 8085 MPU adds 87H and 79H, what will be the contents of the accumulator?
A.	OOH
B.	99 H
C.	100 H
D.	01 H
Answer» B. 99 H

Discussion

105.	The memory address of last location of an 8 KB memory chip is FFFFH. Find the starting address
A.	FOOOH
B.	EOO1 H
C.	EOOO H
D.	FOO1 H
Answer» D. FOO1 H

Discussion

106.	How much is the size of a nibble?
A.	1 bit
B.	2 bits
C.	3 bits
D.	4 bits
Answer» E.

Discussion

107.	A program that translates english-like words of a high level language into the machine language of a computer is
A.	A compiler
B.	Assembler
C.	Interpreter
D.	Source-code
Answer» B. Assembler

Discussion

108.	"The number of transistors per integrated circuit would double every 18 months", this came to be known as
A.	Mealacy's law
B.	IC technology
C.	Moore's law
D.	VLSI
Answer» D. VLSI

Discussion

109.	If the memory chip size is 256 1 bits, how many chips are required to make up 1 K (1024) bytes of memory?
A.	8 chips
B.	32 chips
C.	16 chips
D.	chips
Answer» C. 16 chips

Discussion

110.	How many memory cells are there in a 128 4 memory chip?
A.	128
B.	512
C.	4
D.	1024
Answer» C. 4

Discussion

111.	While executing a program, when the 8085 MPU completes the fetching of the machine code located at the memory address 2057 H, what is the content of the program counter?
A.	2057 H
B.	2056 H
C.	2058 H
D.	2059 H
Answer» C. 2058 H

Discussion

112.	If Register B contains 28 H, and Accumulator 97 H. What will be the content of Register C after the following program has been executed?
A.	28 H
B.	AA H
C.	97 H
D.	OO H
Answer» B. AA H

Discussion

113.	How many address lines are used to identify an I/O port in the memory mapped I/O device?
A.	2
B.	8
C.	4
D.	16
Answer» D. 16

Discussion

114.	The Data Bus is multiplexed with the lower bytes of
A.	Address Bus
B.	Control Bus
C.	Both (A) and (B)
D.	None of these
Answer» B. Control Bus

Discussion

115.	How many address lines are necessary to address 2MB of memory?
A.	21
B.	20
C.	22
D.	10
Answer» B. 20

Discussion

116.	What is the opcode in the given instruction MVI H, L?
A.	MVI
B.	H
C.	L
D.	H, L
Answer» B. H

Discussion

117.	What is the size of the stack pointer in an 8085 MPU?
A.	8 bit
B.	16 bit
C.	32 bit
D.	None of these
Answer» C. 32 bit

Discussion

118.	Which of the following is an example of implicit addressing?
A.	CMA
B.	MVI A, 05
C.	Both (A) and (B)
D.	None of these
Answer» B. MVI A, 05

Discussion

119.	Which is the pin that is utilized for differentiating I/O and memory operations?
A.	31
B.	32
C.	33
D.	34
Answer» E.

Discussion

120.	Which of the following is a 3-byte instruction?
A.	LDA 2050 H
B.	MVI A, 32 H
C.	MOV C, A
D.	ADD B
Answer» B. MVI A, 32 H

Discussion

121.	Which of the following is an example of direct addressing?
A.	STA 2400 H
B.	IN 02
C.	Both (A) and (B)
D.	None of these
Answer» D. None of these

Discussion

122.	Which pin of 8085 is connected to the supply voltage?
A.	1
B.	20
C.	21
D.	40
Answer» E.

Discussion

123.	If the result has an odd number of 1s, what will happen to the parity flag
A.	Set
B.	Reset
C.	Data insufficient
D.	None of these
Answer» C. Data insufficient

Discussion

124.	In intel 8085 MPU, Data Bus is
A.	Bidirectional
B.	Unidirectional
C.	32 bit bus
D.	None of these
Answer» B. Unidirectional

Discussion

125.	In Intel 8085, what is the size of the Accumulator register?
A.	8 bit
B.	16 bit
C.	32 bit
D.	None of these
Answer» B. 16 bit

Discussion

126.	What will be the size of memory address space for a 16-bit data and 20-bit address bus?
A.	1 MB
B.	64 KB
C.	2 MB
D.	None of these
Answer» B. 64 KB

Discussion

127.	Intel 8085 is an
A.	8 bit NMOS processor
B.	8 bit CMOS processor
C.	8 bit PMOS
D.	8 bit HMOS processor
Answer» B. 8 bit CMOS processor

Discussion

128.	"Short forms used for humans to give instructions to P so it can understand those instructions" are called
A.	Mnemonics
B.	Operands
C.	Machine languages
D.	None of these
Answer» B. Operands

Discussion

129.	The register that is used to sequence the execution of the instructions is called
A.	Program counter
B.	Stack pointer
C.	Accumulator
D.	None of these
Answer» B. Stack pointer

Discussion

130.	How many address lines are used to identify an I/O port in the peripheral I/O device?
A.	8
B.	4
C.	16
D.	2
Answer» E.

Discussion

131.	The first two instructions of an interrupt service subroutine are PUSH B, PUSH PSW. What will be the next instance?
A.	POP PSW
B.	HLT
C.	POP B
D.	None of these
Answer» B. HLT

Discussion

132.	Specify the number of times the given loop will count LOOP:
A.	101
B.	100
C.	65
D.	Infinite
Answer» E.

Discussion

133.	What is the total delay for executing the following program?
A.	1.8 ms
B.	1.5 ms
C.	2.0 ms
D.	2.5 ms
Answer» B. 1.5 ms

Discussion

Explore topic-wise MCQs in Microprocessor.

In the peripheral mapped I/O, can an I/O port and an O/P port have the same port address?

Assume that memory location 2075 H has a data byte 47 H. Specify the contents of the address bus A

If the clock frequency is 5 MHz, how much time is required to execute an instruction of 18 T-states?

If the 8085 MPU adds 87H and 79H, what will be the contents of the accumulator?

The memory address of last location of an 8 KB memory chip is FFFFH. Find the starting address

How much is the size of a nibble?

A program that translates english-like words of a high level language into the machine language of a computer is

"The number of transistors per integrated circuit would double every 18 months", this came to be known as

If the memory chip size is 256 1 bits, how many chips are required to make up 1 K (1024) bytes of memory?

How many memory cells are there in a 128 4 memory chip?

While executing a program, when the 8085 MPU completes the fetching of the machine code located at the memory address 2057 H, what is the content of the program counter?

If Register B contains 28 H, and Accumulator 97 H. What will be the content of Register C after the following program has been executed?

How many address lines are used to identify an I/O port in the memory mapped I/O device?

The Data Bus is multiplexed with the lower bytes of

How many address lines are necessary to address 2MB of memory?

What is the opcode in the given instruction MVI H, L?

What is the size of the stack pointer in an 8085 MPU?

Which of the following is an example of implicit addressing?

Which is the pin that is utilized for differentiating I/O and memory operations?

Which of the following is a 3-byte instruction?

Which of the following is an example of direct addressing?

Which pin of 8085 is connected to the supply voltage?

If the result has an odd number of 1s, what will happen to the parity flag

In intel 8085 MPU, Data Bus is

In Intel 8085, what is the size of the Accumulator register?

What will be the size of memory address space for a 16-bit data and 20-bit address bus?

Intel 8085 is an

"Short forms used for humans to give instructions to P so it can understand those instructions" are called

The register that is used to sequence the execution of the instructions is called

How many address lines are used to identify an I/O port in the peripheral I/O device?

The first two instructions of an interrupt service subroutine are PUSH B, PUSH PSW. What will be the next instance?

Specify the number of times the given loop will count LOOP:

What is the total delay for executing the following program?