Assembly Language Programming Questions and Answers

Q: Match List I with List II and select the correct answer using the codes given below :List IList II(a) Register addressing(i) MOVC A, @ A + PC(b) Immediate addressing(ii) DJNZ R2, LOOP(c) Relative addressing(iii) MOV A, # 55H(d) Indexed addressing(iv) MOV A, R1

The correct code is (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i).MOV A, R1 takes its operand from a register, which is register addressing. MOV A, #55H carries the data 55H in the instruction itself, immediate addressing. DJNZ R2, LOOP jumps by a signed offset relative to the program counter, relative addressing. MOVC A, @A+PC forms the address by adding the accumulator to a base register, indexed addressing, used for look-up tables in code memory.The other codes give immediate addressing to MOV A, R1 or treat the DJNZ jump as indexed.

Q: The JS is called as ...............

JS stands for jump if sign (the 'jump the signed bit' option).In the 8086 instruction set, JS is a conditional jump taken when the sign flag SF is 1, that is, when the result of the last arithmetic or logic operation was negative (its most significant bit is 1). Its complement is JNS, jump if not sign.'Jump single bit', 'jump simple bit' and 'jump signal it' do not describe any flag. The S in JS refers to the sign flag, so the option mentioning the signed bit is the one that fits.

Match List I with List II and select the correct answer using the codes given below :

List I	List II
(a) Register addressing	(i) MOVC A, @ A + PC
(b) Immediate addressing	(ii) DJNZ R2, LOOP
(c) Relative addressing	(iii) MOV A, # 55H
(d) Indexed addressing	(iv) MOV A, R1

A.(a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
B.(a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
C.(a)-(iii), (b)-(ii), (c)-(iv), (d)-(i)
D.(a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)

Exam Year(s)

MH SET - 2021, SET Exam - 2021,

Answer: B

The correct code is (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i).

MOV A, R1 takes its operand from a register, which is register addressing. MOV A, #55H carries the data 55H in the instruction itself, immediate addressing. DJNZ R2, LOOP jumps by a signed offset relative to the program counter, relative addressing. MOVC A, @A+PC forms the address by adding the accumulator to a base register, indexed addressing, used for look-up tables in code memory.

The other codes give immediate addressing to MOV A, R1 or treat the DJNZ jump as indexed.

Discuss in Forum

The JS is called as ...............

A.jump the signed bit
B.jump single bit
C.jump simple bit
D.jump signal it

Exam Year(s)

MH SET - 2025, SET Exam - 2025,

Answer: A

JS stands for jump if sign (the 'jump the signed bit' option).

In the 8086 instruction set, JS is a conditional jump taken when the sign flag SF is 1, that is, when the result of the last arithmetic or logic operation was negative (its most significant bit is 1). Its complement is JNS, jump if not sign.

'Jump single bit', 'jump simple bit' and 'jump signal it' do not describe any flag. The S in JS refers to the sign flag, so the option mentioning the signed bit is the one that fits.

Discuss in Forum

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Assembly Language Programming Questions and Answers

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