Reviewed by Editorial Team
The ProProfs editorial team is comprised of experienced subject matter experts. They've collectively created over 10,000 quizzes and lessons, serving over 100 million users. Our team includes in-house content moderators and subject matter experts, as well as a global network of rigorously trained contributors. All adhere to our comprehensive editorial guidelines, ensuring the delivery of high-quality content.
Learn about Our Editorial Process
| By Tcarteronw
T
Tcarteronw
Community Contributor
Quizzes Created: 38 | Total Attempts: 32,005
| Attempts: 736 | Questions: 11
Please wait...
Question 1 / 11
0 %
0/100
Score 0/100
1. True or False: The Boolean data type has two possible values – true and false.

Explanation

The Boolean data type is a type of data that can only have two possible values, true or false. It is commonly used in programming and logic to represent the concept of true or false, on or off, or yes or no. Therefore, the statement that the Boolean data type has two possible values, true and false, is true.

Submit
Please wait...
About This Quiz
Java Ch 2 Quiz - Quiz

Java Ch 2 Quiz assesses understanding of Java syntax, identifiers, data types, expressions, and type casting. It's designed for learners to validate their knowledge of basic Java programming concepts, enhancing their coding skills.

Personalize your quiz and earn a certificate with your name on it!
2. True or False: The value of a variable can change during execution.

Explanation

The value of a variable can indeed change during execution. In programming, variables are used to store and manipulate data. They can be assigned a value initially, but that value can be modified or updated as the program runs. This allows for dynamic and flexible behavior in programs, as variables can hold different values at different points in time. Therefore, the statement is true.

Submit
3. Given the following assignments. What is the value in str? String str; str = "Hello"; str = str + " World";

Explanation

The value in str is "Hello World" because the code first assigns the string "Hello" to the variable str. Then, it concatenates the string " World" to str using the + operator, resulting in the final value of "Hello World".

Submit
4. True or False: Hello! is an example of a legal identifier.

Explanation

Hello! is not a legal identifier because it contains a special character (!) which is not allowed in identifiers. In most programming languages, identifiers can only contain letters, numbers, and underscores, and they cannot start with a number. Therefore, Hello! does not meet the criteria for a legal identifier.

Submit
5. The expression (int)9.2 evaluates to ____.

Explanation

The expression (int)9.2 evaluates to 9 because the "(int)" is a typecasting operator that converts the decimal number 9.2 to an integer. When a decimal number is cast to an integer, the fractional part is truncated and only the whole number part is kept. Therefore, the decimal part of 9.2 is dropped and the result is 9.

Submit
6. Suppose a and b are int variables. What is the value of b? a = 3; b = 4 + (++a)

Explanation

The value of b is 8 because the expression "++a" increments the value of a by 1 before it is added to 4. Therefore, a becomes 4 and b is assigned the value of 4 + 4, which is 8.

Submit
7. The ____ rules of a language determine which instructions are valid.

Explanation

The term "syntax" refers to the set of rules that govern the structure and arrangement of words, phrases, and symbols in a language. In the context of the question, the syntax rules of a language determine which instructions are considered valid or acceptable. These rules ensure that the instructions are written in a way that follows the prescribed structure and format of the language, allowing for proper interpretation and execution.

Submit
8. Java always initializes the value of a variable.

Explanation

Java does not always initialize the value of a variable. In Java, variables are not automatically assigned a value when they are declared. If a variable is not explicitly assigned a value, it will contain a default value depending on its type (e.g., 0 for numeric types, false for boolean, null for object references). Therefore, it is important to initialize variables before using them to avoid unexpected behavior or errors in the code.

Submit
9. A ____ is a set of instructions designed to accomplish a specific task.

Explanation

A method is a set of instructions designed to accomplish a specific task. It is a way to organize and encapsulate a series of steps or actions that need to be performed in order to achieve a desired outcome. Methods are commonly used in programming and computer science to break down complex problems into smaller, more manageable tasks. By defining a method, programmers can reuse the same set of instructions multiple times, making their code more efficient and easier to maintain.

Submit
10. If an operator has an integer and a floating-point operand, the result of the operation is a ____ number.

Explanation

When an operator has an integer and a floating-point operand, the result of the operation will be a floating-point number. This means that the result will have a decimal point and can include fractional parts. In contrast, if both operands were integers, the result would also be an integer without any decimal or fractional parts.

Submit
11. What is the value of the following expression?

Explanation

not-available-via-ai

Submit
View My Results

Quiz Review Timeline (Updated): Mar 22, 2023 +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Mar 22, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • May 12, 2011
    Quiz Created by
    Tcarteronw
Cancel
  • All
    All (11)
  • Unanswered
    Unanswered ()
  • Answered
    Answered ()
True or False: The Boolean data type has two possible values –...
True or False: The value of a variable can change during execution.
Given the following assignments. What is the value in str? ...
True or False: Hello! is an example of a legal identifier.
The expression (int)9.2 evaluates to ____.
Suppose a and b are int variables. What is the value of b? ...
The ____ rules of a language determine which instructions are valid.
Java always initializes the value of a variable.
A ____ is a set of instructions designed to accomplish a specific...
If an operator has an integer and a floating-point operand, the result...
What is the value of the following expression?
Alert!

Advertisement