# 3i Infotech Placement: Sample Questions 526 - 527 of 1245

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## Question 526

### Question

MCQ▾

If a boat is moving in upstream with velocity of 14 km/hr and goes downstream with a velocity of 40 km/hr, then what is the speed of the stream?

### Choices

Choice (4)

a.

34 km/hr

b.

13 km/hr

c.

26 km/hr

d.

None of the above

b.

### Explanation

Boat is moving in upstream with velocity of 14 kmph and downstream with a velocity of 40 kmph.

Upstream speed, b = 14 kmph

Downstream speed, a = 40 kmph

We are asked to find the speed of stream.

Speed of stream will be,

= 13 kmph

So, speed of stream is 13 kmph.

## Question 527

Edit

### Describe in Detail

Essay▾
1. `void main ()`
2. `{`
3. `    unsigned i =1;`
4. `    /⚹unsigned char k =-1 ➾ k =255; ⚹/`
5. `    signed j =-1;`
6. `    /⚹char k =-1 ➾ k =65535 ⚹/`
7. `    /⚹unsigned or signed int k =-1 ➾ k =65535 ⚹/`
8. `    if (i<j)`
9. `    printf("less");`
10. `    else if (i>j)`
11. `    printf ("greater");`
12. `    else if (i==j)`
13. `    printf ("equal");`
14. `}`

### Explanation

• Program defines signed and unsigned values
 unsigned i = 1; define the unsigned variable i = 1 signed j =-1; define the signed variable j =-1 if (i < j)printf ( “less” ) ;else if (i > j)printf ( “greater” ) ;else if (i == j)printf ( “equal” ) ;} check the if conditionif (1 <-1)printf ( “less” ) ;printf prints “less” because unsigned can hold a larger positive value, and no negative value.Signed integers can hold both positive and negative numbers.Unsigned uses the leading bit as a part of the value, while the signed version uses the left-most-bit to identify if the number is positive or negative.

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