Programming  Java  Operators

1. Which of the following can be operands of arithmetic operators?

Numeric Boolean Characters Both Numeric & Characters

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2. Modulus operator, %, can be applied to which of these?

Integers Floating – point numbers Both Integers and floating – point numbers. None of the mentioned

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3. With x = 0, which of the following are legal lines of Java code for changing the value of x to 1?
1. x++;
2. x = x + 1;
3. x += 1;
4. x =+ 1;

1, 2 & 3 1 & 4 1, 2, 3 & 4 3 & 2

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4. Decrement operator, –, decreases value of variable by what number?

1 2 3 4

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5. Which of these statements are incorrect?

Assignment operators are more efficiently implemented by Java run-time system than their equivalent long forms. Assignment operators run faster than their equivalent long forms. Assignment operators can be used only with numeric and character data type. None

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6. What should be expression1 evaluate to in using ternary operator as in this line?
expression1 ? expression2 : expression3

Integer Floating – point numbers Boolean None of the mentioned

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7. What is the value stored in x in following lines of code?
int x, y, z;
x = 0;
y = 1;
x = y = z = 8;

0 1 9 8

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8. What is the order of precedence (highest to lowest) of following operators?
1. &
2. ^
3. ?:

1 -> 2 -> 3 2 -> 1 -> 3 3 -> 2 -> 1 2 -> 3 -> 1

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9. Which of these statements are incorrect?

Equal to operator has least precedence. Brackets () have highest precedence. Division operator, /, has higher precedence than multiplication operator. Addition operator, +, and subtraction operator have equal precedence.

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10. What is the output of relational operators?

Integer Boolean Characters Double

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