# 3i Infotech Papers: Sample Questions 16 - 18 of 1245

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## Question number: 16

MCQ▾

### Question

What is the smallest number by which 2880 must be divided in order to make it into a perfect square?

### Choices

Choice (4) Response

a.

3

b.

5

c.

4

d.

6

b.

### Explanation

Factors of 2880 are

We can clearly see from the factors that we need to multiply the number by 5 to make it a perfect square.

## Question number: 17

MCQ▾

### Question

Two trains move in the same direction at 50 kmph and 32 kmph respectively. A man in the slower train observes the 15 seconds elapse before the faster train completely passes by him. What is the length of faster train?

### Choices

Choice (4) Response

a.

50m

b.

75m

c.

100m

d.

120m

b.

### Explanation

Two trains are moving in the same direction with speed 50 kmph and 32 kmph.

So, net speed

A man in the slower train observes the 15 seconds elapse before the faster train completely passes by him.

We are asked to find the length of the faster train. Let it be x km.

So,

So, length of the train is 75 m.

## Question number: 18

MCQ▾

### Question

What action is taken when the processor under execution is interrupted by a non-maskable interrupt?

### Choices

Choice (4) Response

a.

Processor serves the interrupt request after completing the current task.

b.

Processor serves the interrupt request after completing the execution of the current instruction.

c.

Processor serves the interrupt request immediately.

d.

Processor serving the interrupt request depends upon the priority of the current task under execution.