Operators and Expressions Practice Quiz

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1 of 16

Question1
Why is == being used to check for equality when working with int or double?
- a.In this scenario you actually need to use !=
- b. = and == are used interchangeably
- c. Because = is for assignment in Java.
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2 of 16

Question2
!= is used to check for something not equal
- True
- False
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Question
3 of 16

Question3
What is the result of the following code snippet?
```
int a = 10; 
int b = 20;
```
```
System.out.println(a >= 10 && b >=20);
```
- True
- False
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Question
4 of 16

Question4
What will be the result of the following Java snippet?
```
int number = 66;
String numberAsString = "" + number;
```
- a. The variable numberAsString will be a string with the value of "66" because adding a string to an integer causes the integer to be automatically cast to a string, and the strings will be concatenated normally.
- b. The code will throw an error because it is impossible to define an empty string. Strings always begin and end with double quotation marks, and they must have at least one character between them.
- c. The code will throw an error because strings cannot be added to integers. The plus sign can only be used to add a numeric data type to another variable with the same numeric data type.
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Question
5 of 16

Question5
What is the result of the following code snippet?
```
String fruit = "apples";
int fruitCount = 17;
System.out.println("There are " + fruitCount + " " + fruit + " in the basket.");
```
- a. There are 17 fruit in the basket.
- b. There are 17 apples in the basket.
- c. There are fruitCount fruit in the basket.
- d. There are seventeen apples in the basket.
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Question
6 of 16

Question6
What is the result of the following expression?
```
33 / 11 == 3 && 33 - 22 != 11
```
- a.false
- b.true
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Question
7 of 16

Question7
What is the result of the following expression?
```
12 == 6 * 2 && 12 == 4 * 3
```
- a.true
- b.false
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Question
8 of 16

Question8
What is the result of the following expression?
```
4 > 5 || 1 + 1 == 2 || 10 < 9
```
- a. false
- b. true
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Question
9 of 16

Question9
How would the following English statement be written in Java?
```
Send the email ONLY if there is text in the subject and body.
```
- if ((email.subject.length || email.body.length) > 0) { Mailer.send(email); }
- b. if (email.subject.length > 0 || email.body.length > 0) { Mailer.send(email); }
- c. if (email.subject.length > 0 && email.body.length > 0) { Mailer.send(email); }
- d. if (email.subject.length < 0 && email.body.length < 0) { Mailer.send(email); }
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Question
10 of 16

Question10
What is the result of the following Java snippet?
```
int childrenInClassroom = 17;
int regularGroupSize = 5;
int numberOfNormalSizeGroups = childrenInClassroom / regularGroupSize;
int finalSmallerGroupSize = childrenInClassroom % regularGroupSize;
```
- a. The code will throw an error because it is impossible to evenly divide 17 by 2.
- b. numberOfNormalSizeGroups equals 3.4 finalSmallerGroupSize equals 3
- c. numberOfNormalSizeGroups equals 3 finalSmallerGroupSize equals 2
- d. numberOfNormalSizeGroups equals 3 finalSmallerGroupSize equals unknown
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Question
11 of 16

Question11
What is the result of the following code?
```
String barrelsPerHour = 5;
String hours = 4;
String barrelsToday = barrelsPerHour * hours;
System.out.println(barrelsToday);
```
- a. 20
- b. The code will throw an error because integers cannot be assigned to variables of the String type.
- c. The string "5 * 4" will be printed.
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Question
13 of 16

Question13
What is the result of the following expression?
```
int result = 2 + 14 * 2 - 16 / 8;
```
- a.2
- b.28
- c.-28
- d.-2
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Question
14 of 16

Question14
Which of the following Java expressions produces the output below?
```
32
```
- a. (3 + 3 * 2 / 3) * 10 / 5
- b. (19 – 17) * 2 * (2 * 2 + 1) + 12
- c. 22 * (11 – 7 – 3) + 1
- d. 14 – 9 – 5 * 1 * 22
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Question
16 of 16

Question16
What is the result of the following expression?
```
"chicken" + "_egg" == "chicken_" + "egg"
```
- a.true
- b.false
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Operators and Expressions Practice Quiz

Operators and Expressions Practice Quiz

Operators and Expressions Practice Quiz

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