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Questions and Answers
What is the equivalent of (101101)2 in decimal?
What is the equivalent of (101101)2 in decimal?
What is the binary representation of (87)10?
What is the binary representation of (87)10?
What is the octal equivalent of (125)10?
What is the octal equivalent of (125)10?
What is the decimal equivalent of (34A)16?
What is the decimal equivalent of (34A)16?
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What is the hexadecimal representation of (11101001)2?
What is the hexadecimal representation of (11101001)2?
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What is considered plagiarism?
What is considered plagiarism?
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How can plagiarism be avoided when note taking?
How can plagiarism be avoided when note taking?
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What constitutes quoting the author?
What constitutes quoting the author?
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What can result in plagiarism?
What can result in plagiarism?
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What is an example of plagiarism?
What is an example of plagiarism?
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In Java, what is the result of the concatenation operation for the following code snippet: String word = 'good'; word += 'bye';?
In Java, what is the result of the concatenation operation for the following code snippet: String word = 'good'; word += 'bye';?
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Which operator is used to compare two operands and return a boolean value in Java?
Which operator is used to compare two operands and return a boolean value in Java?
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What is the purpose of the boolean type in Java?
What is the purpose of the boolean type in Java?
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What does the following boolean expression return in Java: boolean seniorStatus = age >= 65;?
What does the following boolean expression return in Java: boolean seniorStatus = age >= 65;?
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Which operator is used as the concatenation-assignment shortcut in Java?
Which operator is used as the concatenation-assignment shortcut in Java?
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Study Notes
Methods in Java
- The chapter's objectives include using Math methods, string methods, understanding boolean type, building custom Java methods, defining parameters, and distinguishing between class and instance methods.
Java's Math Class
- The Math class provides a set of math functions and is part of the java.lang package, so it doesn't require importation.
- Math class methods are static, meaning you don't need to create a Math object to use them.
- Math methods typically take double arguments.
- The Math class has two constants: Math.E and Math.PI.
Example of Math Class Usage
- Compute the volume of a sphere given the radius using the formula: volume = 4/3 * PI * radius^3.
- Implementation in Java:
double volume = 4.0 / 3.0 * Math.PI * Math.pow(radius, 3.0);
The String Type
- The String type is used to store a sequence of characters.
- Example:
String lastName = "Cat";
Instance and Class Methods
- An instance method is a message sent to an object.
- A class method is a message sent to a class, indicated by the word
static. - Example of an instance method:
char lastInit = lastName.charAt(0); - Example of a class method:
String PI_STR = String.valueOf(Math.PI);
Java API and String Operations
- The Java API lists a rich set of String operations.
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Description
Test your knowledge of binary, decimal, octal, and hexadecimal number systems, as well as conversion between binary and decimal. Learn how to convert numbers from base 2 to base 10 and vice versa. This quiz covers topics such as binary to decimal conversion and vice versa.
