18 Questions
What method returns the absolute value of its argument in the Math class?
abs()
Which constant is present in the Math class to represent the mathematical value of pi?
π
In Java, what does the Math class conventionally use to name constants?
Capital Letters
Which method in the Math class returns a double value greater than or equal to 0.0 and less than 1.0?
random()
What does the max() method in the Math class return?
The larger of two int or double arguments
Which method in the Math class raises Euler's number e to the power of its argument?
exp()
What does the method Math.max(j,k) do?
Returns the larger of two int arguments
What does explicit casting in Java allow us to do?
Change the type of a value
Which syntax represents explicit casting in Java?
(type) exp
Which class in Java is a utility class with static methods?
Integer
What does the Integer class method max(…) do?
Returns the larger of two int arguments
'Java convention is to name constants using capital letters' is associated with which class?
Integer
What does the toString(…) method do?
Returns the String object representing an integer value
Which method is used to convert a character string to an integer?
parseInt(…)
In TotalQuantity.java, what does the line 'String qtyAsString = line.substring(commaAt+1);' do?
Extracts the quantity value from the input line
What is the purpose of wrapper classes in Java?
To convert primitives to objects
What is the role of the Integer class in Java?
It provides utility static methods for integers
Why are wrapper classes called 'wrapper' classes?
Because they wrap primitive values inside objects
Test your knowledge on using the Math.max method in Java and understanding casting operations. This quiz covers passing arguments to the max method, using it to find the maximum value, and the concept of casting in Java programming.
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