13 Questions
What data type is used to declare named constants in Java?
Named constants
What is the value of the last element in the codeArray?
'T'
What is the subscript of the element '' in the codeArray?
3
How many elements does the codeArray have if we add two more elements to it?
13
What is the purpose of the backslash () in the codeArray?
To escape a single quote
Which concept in Java is often referred to as information hiding?
Encapsulation
What is a primary benefit of using methods in Java programming?
Code reusability
What does the 'divide and conquer' approach refer to in Java programming?
Breaking down complex problems into smaller, more manageable tasks
What would be displayed if the following pseudocode was coded and executed, with salary = 400?
480
What is the correct way to call a method with an integer parameter in Java?
calculate(int number);
What is the output of the following code?
ArrayIndexOutOfBoundsException
What is the term used to describe the process of passing a value to a method parameter in Java?
Pass by value
What is used to specify the size of an array in Java?
Brackets
Study Notes
Java Fundamentals
- Encapsulation is often referred to as information hiding.
- Code reusability is a benefit of using methods in Java.
- The term "divide and conquer" in Java programming refers to breaking down complex problems into smaller, more manageable tasks.
Methods
- When calling a method, the correct syntax is
calculate(int number);. - When you invoke a method with a parameter, the value of the argument is passed to the parameter, which is referred to as pass by value.
Arrays
- Named constants are usually used to specify the size of an array.
- In the code
char[] codeArray = {'C', 'P', '\'', 'S', 'I', 'Y', '\'', 'C', 'O', 'T'};, the array has 11 elements. - The subscript of the first element in the array is 0.
- The subscript of the last element in the array is 10.
- The array type is
char[]. - The value stored in
codeArrayis 'C'.
Control Flow
- If the following pseudocode was coded and executed, with
salary = 400, the output would be 480:
IF salary > 400 THEN
SET bonus = 10
SET salary = salary + bonus
ELSE
SET salary = salary + salary *.20
End IF
DISPLAY salary
Learn the basics of Java programming, including encapsulation, code reusability, and method syntax. Discover how to break down complex problems and write efficient code.
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