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Q:

Can 8259 he interfaced with 8085 via the trap pin?

Answer

Yes... so if 8529 gives interrupt then it will be serviced immediately but since INTA pin is left hanging the INSR bit will never be set.. and so whenever my interrupt occurs depending upon priority it will be serviced.. also the ISR address for all interrupts will be same ie 0024H..

Interrupt via trap is nonmaskable, so it will be serviced immediately.

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Subject: Hardware

Q:

The average price of three items of furniture is Rs. 15000. If their prices are in the ratio 3:5:7, the price of the cheapest item is :

A) 6000	B) 7000
C) 8888	D) 9000

Answer & Explanation Answer: D) 9000

Explanation:

Let their prices be 3x, 5x and 7x.

Then, 3x + 5x + 7x = (15000 * 3) or x = 3000.

Cost of cheapest item = 3x = Rs. 9000.

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Filed Under: Average

Q:

A car owner buys petrol at Rs 7.50, Rs. 8 and Rs. 8.50 per litre for three successive years. What approximately is the average cost per litre of petrol if he spends Rs. 4000 each year ?

A) 6.23	B) 7.98
C) 8.97	D) 9.89

Answer & Explanation Answer: B) 7.98

Explanation:

Total quantity of petrol consumed in 3 years =(4000/7.50+4000/8+4000/8.50) liters

= 4000(2/15+1/8+2/17) liters

= 76700/51 liters

Total amount spent = Rs. (3 x 4000) = Rs. 12000.

$\therefore$ Average cost = Rs. (12000*51/76700) = Rs. 7.98.

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Filed Under: Average

Q:

The captain of a cricket team of 11 members is 26 years old and the wicket keeper is 3 years older. If the ages of these two are excluded, the average age of the remaining players is one year less than the average age of the whole team. What is the average age of the team ?

A) 20 years	B) 21 years
C) 23 years	D) 25 years

Answer & Explanation Answer: C) 23 years

Explanation:

Let the average age of the whole team be x years.

11x - (26 + 29) = 9 (x - 1)

=> 11x - 9x = 46

=> 2x = 46

=> x = 23.

So, average age of the team is 23 years.

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Filed Under: Average

Q:

Food wrapped in news paper is likely to get contaminated by

A) Magnesium	B) Alluminium
C) Lead	D) Copper

Answer & Explanation Answer: C) Lead

Explanation:

It gets contaminated by lead

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Filed Under: Biology

Q:

What happens when HLT instruction is executed in processor?

Answer

The Micro Processor enters into Halt-State and the buses are tri-stated.

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Subject: Hardware

Q:

In an examination, a pupil's average marks were 63 per paper. If he had obtained 20 more marks for his Geography paper and 2 more marks for his History paper, his average per paper would have been 65. How many papers were there in the examination ?

A) 8	B) 9
C) 10	D) 11

Answer & Explanation Answer: D) 11

Explanation:

Let the number of papers be x. Then, 63x + 20 + 2 = 65x or 2x = 22 or x = 11.

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Filed Under: Average

Q:

What is the capital of Nigeria?

A) Monaco	B) Abuja
C) Podgorica	D) None

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