Mathematical Library Methods

Chapter 7

Mathematical Library Methods

Class 10 - Logix Kips ICSE Computer Applications with BlueJ

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Multiple Choice Questions

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Question 1

What will be the output of Math.cbrt(-125)?

1. 5.0
2. 0.0
3. -5.0 ✔
4. error — can't use Math.cbrt() on a negative number

Question 2

Which Java package includes the Math class?

1. java.io
2. java.lang ✔
3. java.util
4. java.sys

Question 3

Give the output of Math.sqrt(x); when x = 9.0

1. 3
2. 3.0 ✔
3. 3.00
4. All of these

Question 4

Give the output of Math.ceil(-0.6).

1. -1.6
2. -1.5
3. -1.0
4. -0.0 ✔

Question 5

Give the output of Math.ceil(-46.6).

1. -46.6
2. -46.5
3. -47.0
4. -46.0 ✔

Question 6

Give the output of Math.abs(x); when x = -9.99

1. -9.99
2. 9.99 ✔
3. 0.99
4. None of these

Question 7

Which of the following is a method to find the square root of a number?

1. FindSquareroot(x)
2. Sqrt(x)
3. Math.Square(x)
4. Math.sqrt(x) ✔

Question 8

What will be the output of Math.pow(3, 0)?

1. 0.0
2. 1.0 ✔
3. 3.0
4. -1.0

Question 9

Math.random() returns a double value r such that ...........

1. 0.0 <= r < 1.0 ✔
2. 0.0 <= r <= 1.0
3. 0.0 < r <= 1.0
4. 0.0 < r < 1.0

Question 10

What will be the output of Math.floor(-20.10)?

1. -20.0
2. -21.0 ✔
3. 20
4. 21

Question 11

What will be the output of Math.round(0.5)?

1. 0.0
2. 0
3. 1 ✔
4. 1.0

Question 12

What will be the output of Math.abs(-0)?

1. 0.0
2. 0 ✔
3. -0
4. +0

Question 13

Given the following statements:

int min = 1, max = 10;int range = max - min + 1;int num = (int) (range * Math.random() + min);

The value of num will be in integer such that ...........

1. 1 <= num <= 10 ✔
2. 1 <= num < 10
3. 1 < num <= 10
4. 1 < num < 10