Question is ⇒ Assertion (A): In microprocessor 8085 instruction LXIB, 90 FF H means register B and C are loaded with upper and lower bytes to get B = 90 H and C = FFH.Reason (R): In 8085 the stack pointer indicates which memory location is to accessed., Options are ⇒ (A) Both A and R are correct and R is correct explanation of A, (B) Both A and R are correct but R is not correct explanation of A, (C) A is correct R is wrong, (D) A is wrong R is correct, (E) , Leave your comments or Download question paper.

Question is ⇒ Assertion (A): In microprocessor 8085 instruction LXIB, 90 FF H means register B and C are loaded with upper and lower bytes to get B = 90 H and C = FFH.Reason (R): In 8085 the stack pointer indicates which memory location is to accessed., Options are ⇒ (A) Both A and R are correct and R is correct explanation of A, (B) Both A and R are correct but R is not correct explanation of A, (C) A is correct R is wrong, (D) A is wrong R is correct, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	Assertion (A): In microprocessor 8085 instruction LXIB, 90 FF H means register B and C are loaded with upper and lower bytes to get B = 90 H and C = FFH. Reason (R): In 8085 the stack pointer indicates which memory location is to accessed.
A.	Both A and R are correct and R is correct explanation of A [Wrong Answer]
B.	Both A and R are correct but R is not correct explanation of A [Correct Answer]
C.	A is correct R is wrong [Wrong Answer]
D.	A is wrong R is correct [Wrong Answer]
View Answer 1 -1 Explanation:- Answer : B Discuss it below : !! OOPS Login [Click here] is required to post your answer/result Help other students, write article, leave your comments

Previous question Next question

Also Read Similar Questions Below :

⇒ Noise generated in a resistor is also known as
partition noise
white noise
thermal noise
shot noise

⇒ Consider the following

The first letter of a Java variable is lower case.
Each successive word in Java variable begins with a capital letter.
All other letters are lower case.
A Java variable can have a digit as first character.

Which of the above are correct?
All
1, 2, 3 only
1, 2, 4 only
2, 3, 4 only

⇒ A half wave diode rectifier has a capacitance input filter. If input voltage is V_m sin ωt, PIV is
V_m
2 V_m
3 V_m
4 V_m

⇒ In CE amplifier
input and output are in phase
phase difference between input and output is 30° to 90°
phase difference between input and output is 60° to 120°
output is inverted with respect to its input voltage

⇒ If G(s)H(s) = K (T₁s + 1)/[s² (T₂s + 1)] the system stability depended an relative magnitudes of T₁ and T₂.
TRUE
FALSE

⇒ The system in the given fi
will be unstable due to the presence of positive feedback in the inner loop
may be stabilized by the negative feedback outer loop
can never be stable
will always be stable

⇒ Half bridge and full bridge inverters of one type use different commutation methods.
TRUE
FALSE

⇒ A system has 12 poles and 2 zeros. Its high frequency asymptote in its magnitude plot has a slope of
-200 dB/decade
-240 dB/decade
-280 dB/decade
-320 dB/decade

⇒ Some words like READ, WRITE, STOP etc. cannot be used as variable names in Fortran 77.
TRUE
FALSE

⇒ In which n type device does p substrate extend upto silicon dioxide layer?
JFET
Depletion type MOSFET
Enhancement type MOSFET
Both (b) and (c)

⇒ In a shield helix
the spacing between adjacent turns is very large
the spacing between adjacent turns approaches zero
the spacing between adjacent turns approaches zero and wire thickness approaches zero
the spacing between adjacent turns is very large wire thickness approaches zero

⇒ Let JCOKE = 98 and LPEPSI = 42 Consider the statement 103
106
109
none of the above

⇒ In a network containing resistances, reactances the root of the characteristic equation give for the circuit
the forced response
the total response
the natural response
the damped response

⇒ Circular polarization
is useful in reducing depolarization effect on received wave
involves critical alignment of transmitting and receiving antenna
is useful in discrimination between reception of adjacent beams
none of the above

⇒ In given figure the switch was closed for a long time before opening at t = 0. The voltage V_x at t = 0^{+25 V
50 V
-50 V
0 V}

⇒ Two ammeters having resistances of 0.5 Ω and 0.25 Ω and having full scale reading of 25 A each are connected in parallel. To ensure that neither of them goes beyond scale, the total current should not be more than
50 A
37.5 A
25 A
40 A

⇒ The absorption of radio waves by the atmosphere depends on
the polarization of the waves
the polarization of the atmosphere
frequency of the waves
their distance from the transmitter

⇒ Highest resistivity of the following is
nichrome
constantan
metal
manganin

⇒

Assertion (A): When cathode temperature is increased from 2500 K to 2550 K, thermionic emission current may increase by about 50%.

Reason (R): Thermionic emission current ∝ T² e^-Ew/kT.

Both A and R are true and R is correct explanation of A
Both A and R are true but R is not correct explanation of A
A is true but R is false
A is false but R is true

⇒ A twisted ring counter consisting of 4 FF will have
4 states
8 states
2⁴ states
None of the above

⇒ When the modulating frequency is doubled, the modulation index is halved and the modulating voltage remains constant. The modulation system is
FM
AM
phase modulation
none of the above

⇒ Material which lack permanent magnetic dipoles are known as
paramagnetic
diamagnetic
ferromagnetic
ferrimagnetic

⇒ For the K map in the given figure, the simplified expressio
x_l x₂ x₄ + x₂ x₄ + x₁ x₃
x₂ x₄ + x₂ x₄ + x₁ x₃
x₁ x₂ x₄ + x_l x₂ + x₃ x₄ + x₂x₄
x₁ x₂ + x₂ x₃ + x₃x₄

⇒ A line has standing waves with a voltage maximum of 35 mV and minimum of 17.5 mV VSWR is
2
4
0.5
0.25

⇒ If the energy is supplied from a source, whose resistance is 1 ohm, to a load of 100 ohms the source will be
a voltage source
a current source
both of the above
none of the above

⇒ Which of the following is/are correct? The circuit shown in the fig
1 and 3
1 and 2
1 and 4
3 only

⇒ An RL impedance function is to be synthesised in second Foster form. The proper function to be expanded is
Z(s)
sZ(s)
1/Z(s)
Z(s)/s

⇒ The purpose of connecting a coupling capacitor in the output circuit of an amplifier is
to increase voltage gain
to increase collector current
to block dc collector voltage
all of the above

⇒

Match the following:

	List I		List II
A.	Resistance	1.	M^-1L^-2T²I²
B.	Inductance	2.	ML²T^-2I^-2
C.	Capacitance	3.	M^-1L^-2T⁴I²
D.	Reluctance	4.	ML²T^-3I^-2

A-1, B-2, C-3, D-4
A-2, B-1, C-3, D-4
A-4, B-2, C-3, D-1
A-2, B-4, C-3, D-1

⇒ The distance at which a sky wave is received back on earth decreases with angle of incidence for all angles of incidence.
TRUE
FALSE