Microprocessors - Section 1 (6)

Directions to Solve

Microprocessors - Section 1

41.

When .4546 E 5 and .5433 E 7 are to be added in normalized floating point mode

A.	none of the numbers is changed to any other form
B.	.4546 E 5 is changed .004546 E 7 and .5433 E 7 is not changed
C.	.5433 E 7 is changed to 54.33 E 5 and .4546 E 5 is not changed
D.	both the numbers are changed and their exponents are made equal to 6

Answer: Option B

Explanation:

Exponents are made equal and integer part is made zero.

42.

Which of the following is not a valid variable name in C?

A.	1 a
B.	a 1 2
C.	a b 123
D.	a b c 123

Answer: Option A

Explanation:

First character must be alphabet.

43.

IC (instruction cycle), FC (fetch cycle) and EC (executive cycle) are related as

A.	IC = FC - EC
B.	IC = FC + EC
C.	IC = FC + 2EC
D.	EC = IC + EC

Answer: Option B

Explanation:

Instruction cycle consists of fetch and execute cycles.

44.

To multiply a number by 8 in 8085 we have to use RAL instruction

A.	once
B.	twice
C.	thrice
D.	four times

Answer: Option C

Explanation:

When RAL instruction is used once the number is doubled.

45.

Expression ++i is equivalent to

A.	i = i + 2
B.	i = i + 1
C.	i = i - 1
D.	i = i + i + i

Answer: Option B

Explanation:

i is incremented by 1.

46.

Binary number 1101.101 is equivalent to decimal number?

A.	13.5
B.	13.75
C.	13.625
D.	13.875

Answer: Option C

Explanation:

Binary .101 equals 0.625 in decimal.

47.

JCOKE = 3 JCOKE = JCOKE + 1 GO TO (5, 8, 9, 11, 15, 16 18, 20) JCOKE.

After the execution of above statement, the control is transferred to statement number

A.	8
B.	11
C.	16
D.	20

Answer: Option B

Explanation:

It is a computed GO TO statement. Since J COKE = 3 + 1 = 4, the control is transferred to statement 11.

48.

8085 has 6 sign flags.

A.	True
B.	False

Answer: Option B

Explanation:

It has one sign flag S.

Microprocessors - Section 1 (6)

Microprocessors - Section 1

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