1. The correct order of precedence for these operators is:
- ++ (postfix increment)
- * (multiplication)
- % (modulus)
- + (addition)
- < (less than)
2. The equivalent Java expression for a²+b²+2ab is:
```java
int result = a * a + b * b + 2 * a * b;
```
3. The output of the expression `a += a++*++a % a` if `a` is 5 would be 11.
Explanation:
* `a++` is a postfix increment operator, which means it will use the current value of `a` (5) and then increment it by 1.
* `++a` is a prefix increment operator, which means it will increment `a` by 1 and then use the updated value (6).
* `a` is still 6 at this point.
* `a++ * ++a % a` can be evaluated as `6 * 7 % 6`, which equals 0.
* Finally, `a += 0` means `a = a + 0`, so `a` remains 6.
4. The expression `(true) || (true)` will return `true` because the || operator is a logical OR operator. It returns true if at least one of the operands is true.
5. The expression is incomplete and does not have any specific operators or operands to determine its outcome. Please provide the full expression for a proper evaluation.
When you first read a question, try not to look at the choices or cover them with your hand to avoid doubting yourself and getting stuck. Try to make a guess off of the top of your head. Then, read the choices and see if any of them are close to your guess. Eliminate outliers and the highest and lowest numbers.
Answers & Comments
Verified answer
Answer:
1. The correct order of precedence for these operators is:
- ++ (postfix increment)
- * (multiplication)
- % (modulus)
- + (addition)
- < (less than)
2. The equivalent Java expression for a²+b²+2ab is:
```java
int result = a * a + b * b + 2 * a * b;
```
3. The output of the expression `a += a++*++a % a` if `a` is 5 would be 11.
Explanation:
* `a++` is a postfix increment operator, which means it will use the current value of `a` (5) and then increment it by 1.
* `++a` is a prefix increment operator, which means it will increment `a` by 1 and then use the updated value (6).
* `a` is still 6 at this point.
* `a++ * ++a % a` can be evaluated as `6 * 7 % 6`, which equals 0.
* Finally, `a += 0` means `a = a + 0`, so `a` remains 6.
4. The expression `(true) || (true)` will return `true` because the || operator is a logical OR operator. It returns true if at least one of the operands is true.
5. The expression is incomplete and does not have any specific operators or operands to determine its outcome. Please provide the full expression for a proper evaluation.
Answer:
When you first read a question, try not to look at the choices or cover them with your hand to avoid doubting yourself and getting stuck. Try to make a guess off of the top of your head. Then, read the choices and see if any of them are close to your guess. Eliminate outliers and the highest and lowest numbers.