Avichal solutions for Computer Applications [English] Class 10 ICSE chapter 1.4 - Operators in Java [Latest edition]

What are the values of x and y when the following statements are executed?

int a = 63, b = 36;
boolean x = (a > b) ? a : b;
int y = (a < b) ? a : b; 

What is meant by the precedence of operators?

Operators with higher precedence are evaluated before operators with relatively lower precedence. Arrange the operators given below in order of higher precedence to lower precedence.

1. && 
2. % 
3. >= 
4. ++

Give the output of the following method:

public static void main (String [] args)
{
int a = 5;
a++;
System.out.println(a);
a -= (a--) − (--a); 
System.out.println(a);
}

Evaluate the value of n. if value of p = 5, q = 19  
int n = (q – p) > (p – q) ? (q – p) : (p – q) 

Which of the following is the correct precedence of logical operators?

Choose the odd one out from the following: 

Given: String st = (a>= 90)? "Excellent": "Best";

Predict the output, when a = 90.

Choose the odd one out from the following: 

Given: x + = x++ + ++ x  + − − x

Find the value, when x = 5.

The precedence of operators in Java follows BODMAS. 

The output of a++ will be 1, if int a = -1.

The relational operators always result in terms of 'True' or 'False'.

Given: int m = 5; m* = 5; then the value stored in m results in 55. 

The statement (a>b) && (a>c) uses a logical operator. 

If int a = 27, b = 4, c = O; then c = a%b; results in 3.

The statement p + = 5 means p = p*5. 

In the precedence of logical operators; NOT is followed by AND. 

Write the Java expression for the following:

`root3 (ab + cd)`

Write the Java expression for the following:

p³ + q⁴ − `1/2`r 

Write the Java expression for the following:

`(−b+sqrt(b^2 - 4ac))/(2a)`

Write the Java expression for the following:

`(0.05 - 2y^3)/((x - y))`

Write the Java expression for the following:

`sqrt(mm) + root3 ((m + n))` 

Write the Java expression for the following:

`3/4 (a + b) - 2/5 ab`

Write the Java expression for the following:

`3/8sqrt((b^2 + c^3))`

Write the Java expression for the following:

`root3 (a) + b^2 - root3c`

Write the Java expression for the following:

`sqrt(a + b^2 + c^3)/3`

Write the Java expression for the following:

`sqrt(3x + x^2)/((a + b))`

Write the Java expression for the following:

z = x³ + y³ − `y/z^3`

Write the Java expression for the following:

q = `1/sqrt(a + b) + 3/c^2`

Predict the output: 

int c = (3<4)? 3*4:3+4; 

Predict the output:

int a = 14, b = 4;
boolean x = (a>b)? true: false;

Predict the output:

int x = 90;
char c = (x<=90)? 'Z':'I';

Predict the output:

int a = 18; int b = 12;
boolean t = (a>20 && b< 15)? true:false; 

Predict the output:

c = (val + 550 < 1700)? 200: 400; 

if: val = 1000 

Predict the output:

c = (val + 550 < 1700)? 200: 400;

if: val = 1500 

What is an operator?

What are the three main types of operators? Name them. 

How is Java expression different from statement? 

Explain the following with one example. 

Arithmetic operator 

Explain the following with one example.

Relational operator

Explain the following with one example.

Logical operator

Explain the following with one example.

Ternary operator

Write a difference between unary and binary operator.

Distinguish between Postfix increment and Prefix increment.

Distinguish between Postfix decrement and Prefix decrement.

Distinguish between (p != q) and !(p == q).

What is the difference between / and % operator? 

What is the difference between = and ==? 

What will be the output of the following code? 

int k = 5, j = 9;
k += k++ - ++j + k;
System.out.println("k=" + k);
System.out.println("j="+ j); 

What will be the output of the following code?

If int y = 10 then find int z = ( ++y * (y++ + 5));

Give the output of the following expression:
a+= a++ + ++a + -- a + a--; when a = 7;

What is the value of y after evaluating the expression given below?

y+= ++y + y-- + --y; when int y=8; 

Rewrite the following program segment using if-else statements instead of the ternary operator: 
String grade = (mark >= 90) ? “A” : (mark >= 80) ? “B” : “C”;

Rewrite the following program segment using if-else statements instead of the ternary operator.

commission = (sale > 5000) ? (sale * 10) / 100 : 0;

Rewrite the following program segment using if-else statements instead of the ternary operator.

net = (salary > 10000) ? salary − (8.33 / 100) * salary : salary − (5 / 100) * salary.

Rewrite the following program segment using if-else statements instead of the ternary operator.

s = (a+b < c || a + c <= b || b + c <= a) ? "Triangle is not possible": "Triangle is possible";  

Rewrite the following program segment using if-else statements instead of the ternary operator.

c = (x >= 'A' && x <= 'Z') ? "Upper Case Letter" : "Lower Case Letter";

Rewrite the following using ternary operator.

if (x % 2 == 0) 
System.out.println("Even");
else
discount = bill * 5.0 / 100;

Rewrite the following using ternary operator : 

if (bill > 10000)
discount = bill * 10.0 / 100;
else
discount = bill * 5.0 / 100;

Rewrite the following using ternary operator.

if (income < 10000)
tax = 0; 
else
tax = 12; 

Rewrite the following using ternary operator.

if (a > b)
{
if (a > c)
g = a;
else
g = c;
}
if (b > c) 
g = b;
else
g = c;

Rewrite the following using ternary operator.

if (p >= 4750) 
k = p * 5 / 100; 
else 
k = p * 10 / 100;