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1. A' and 'B' complete a work togather in 8 days.If 'A' alone can do it in 12 days.Then how many day 'B' will take to complete the work?

Answer: 24 days

Explanation:

A & B one day work = 1/8
A alone one day work = 1/12
B alone one day work = (1/8 - 1/12) = ( 3/24 - 2/24)
=> B one day work = 1/24
so B can complete the work in 24 days.

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2. If A alone can do a piece of work in 8 days and B alone can do the same work in 12 days. How many days A and B required to finish the same work if they work togather?

Answer: 24/5 days

Explanation:

A alone one day work = 1/8
B alone one day work = 1/12
Both A and B one day work = (1/8 + 1/12) = (3/24 + 2/24)
= 5/24
so A and B together finish the work in 24/5 day
or 4 4/5 days.

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3. When a number is divided by 13, the remainder is 11. When the same number is divided by 17, then remainder is 9. What is the number ?

Answer: 349

Explanation:

x = 13p + 11 and x = 17q + 9

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4. A train running at the speed of 60 km/hr crosses a pole in 9 seconds. What is the length of the train?

Answer: 150 metres

Explanation:

Length of the train = (Speed x Time) =50/3 x 9 m = 150 m.

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5. A can do a work in 10 days and B can do the same work in 15 days. So how many days they will take to finish the same work ?

Answer: 6 days

Explanation:

First find the 1 day work of both (A & B)
A 1 day's work = 1/10
and
B 1 day's work = 1/15

So (A + B) 1 day's work = (1/10+1/15)
= (3/30+2/30) = 5/30 = 1/6

So Both (A & B) together can finish work in 6 days

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6. Look at this series: 36, 34, 30, 28, 24, ... What number should come next?

Answer: 22

Explanation:

Here is no explanation for this answer

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7. A can finish a piece work in 18 days and B can do the same work in half the time taken by A. So if they working together, what part of the same work can finished in a day?

Answer: 1/6

Explanation:

First find the 1 day work of both (A & B)
A's 1 day's work = 1/18
and
B's 1 day's work = 1/9 (B can do work in half time)
(A + B)'s 1 day's work = (1/18+1/9)
= (1+2)/18 = 3/18 = 1/6
so A & B together can do 1/6 of work in 1 day.

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8. Object-oriented programmers primarily focus on

Answer: objects and the tasks that must be performed with those objects

Explanation:

Here is no explanation for this answer

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9. Which of the choices is true for the mentioned declaration?

const char *p;
and
char * const p;

Choose one of them:

Answer: In first case, you can't change the character and second case you can’t change the pointer

Explanation:

Here is no explanation for this answer

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