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2. What is the final value stored in variable x? [2022]
double x=Math.ceil(Math.abs(-7.3));
a. 7.0 b. 8.0
c. 6.0 d. 9.0
Ans. b
3. Write a Java expression for the following:
2
|x + 2xy| [2019]
Ans. Math.abs(x * x + 2 * x * y)
4. Give the output of the following:
Math.sqrt(Math.max(9, 16)) [2019]
Ans. 4.0
5. Evaluate the following expression if the value of x = 2, y = 3 and z = 1.
v = x + --z + y++ + y; [2019]
Ans. v = x + --z + y++ + y;
= 2 + 0 + 3 + 4
= 9
6. Write a Java expression for the following:
2
(3x + x )
[2018]
(a + b)
Ans. Math.sqrt((3 * x + x * x) / (a + b))
7. What is the value of y after evaluating the expression given below?
y += ++y + y-- + --y; when int y = 8. [2018]
Ans. y = ++y + y-- + --y
y = y + (++y + y-- + --y)
= 8 + 9 + 9 + 7
= 17 + 9 + 7
= 26 + 7
= 33
8. Give the output of the following:
(i) Math.floor(-4.7) (ii) Math.ceil(3.4) + Math.pow(2, 3) [2018]
Ans. (i) -5.0 (ii) 4.0 + 8.0 = 12.0
9. Write a Java expression for the following:
3
5
ax + bx + c [2017]
Ans. a * Math.pow(x, 5) + b * Math.pow(x, 3) + c
10. What are the values stored in variables r1 and r2?
(a) double r1 = Math.abs(Math.min(-2.83, -5.83)); (b) double r2 = Math.sqrt(Math.floor(16.3)); [2017
Ans. (a) 5.83 (b) 4.0
11. Give the output of the following Math methods:
(a) Math.ceil(4.2) (b) Math.abs(-4) [2016]
Ans. (a) 5.0 (b) 4
2
2
2
12. Write down Java expression for: T = √(A + B + C )
Ans. T = Math.sqrt(Math.pow(A, 2) + Math.pow(B, 2) + Math.pow(C, 2));
13. Name the mathematical method which is used to find the sine of an angle given in radians. [2015]
Ans. Math.sin()
2
2
14. Write a Java expression for: (a + b ) ÷ 2ab [2015]
Ans. (Math.pow(a,2) +Math.pow(b,2))/(2*a*b)
15. What is the data type that the following library method returns?
Math.random() [2013]
Ans. double
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Mathematical Library Methods 113

