Podcast
Questions and Answers
What will be the output of the main method in the Test class?
What will be the output of the main method in the Test class?
- Error: makeSound method not found
- No output
- Bark (correct)
- Some generic sound
Which statement is true about the array search implemented in the provided code?
Which statement is true about the array search implemented in the provided code?
- It checks for null values before searching
- It returns the first occurrence of the key found, or -1 if not found (correct)
- It sorts the array before searching for the key
- It uses binary search to find the key efficiently
What condition causes a swap during the bubble sort process?
What condition causes a swap during the bubble sort process?
- If arr[j] is less than arr[j + 1]
- If arr[j] is not found in the array
- If arr[j] is greater than arr[j + 1] (correct)
- If arr[j] is equal to arr[j + 1]
How does a nested loop behave within another nested loop?
How does a nested loop behave within another nested loop?
Which of the following is an accurate characteristic of arrays as described?
Which of the following is an accurate characteristic of arrays as described?
What is a primary benefit of using methods in code?
What is a primary benefit of using methods in code?
What does the method isEven(int num) return when num is equal to 7?
What does the method isEven(int num) return when num is equal to 7?
In the leap year checking condition, which of the following statements must be true for a year to be classified as a leap year?
In the leap year checking condition, which of the following statements must be true for a year to be classified as a leap year?
What does the calculateArea method return when called with length 5 and width 10?
What does the calculateArea method return when called with length 5 and width 10?
Which statement correctly identifies how the switch statement is utilized to check if a character is a vowel?
Which statement correctly identifies how the switch statement is utilized to check if a character is a vowel?
What is the role of inheritance in object-oriented programming?
What is the role of inheritance in object-oriented programming?
What is the output of the if statement for the year 1900 when checking for a leap year?
What is the output of the if statement for the year 1900 when checking for a leap year?
What operation is performed by the modulus operator % in the method isEven(int num)?
What operation is performed by the modulus operator % in the method isEven(int num)?
Flashcards
Inheritance in Java
Inheritance in Java
A mechanism where a class (child class) can inherit properties and behaviors from another class (parent class).
Method Overriding
Method Overriding
When a child class defines a method with the same name and signature as a method in its parent class.
Array Search
Array Search
Finding a specific element in an array.
Bubble Sort
Bubble Sort
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Nested Loops
Nested Loops
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Method
Method
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Method Parameter
Method Parameter
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Conditional Statement (if-else)
Conditional Statement (if-else)
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Leap Year
Leap Year
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Modulus Operator (%)
Modulus Operator (%)
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Switch Statement
Switch Statement
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Inheritance
Inheritance
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Return Value
Return Value
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Study Notes
Methods
- A method is a block of code performing a specific task.
- Methods make code reusable and manageable.
- Methods can accept parameters and/or return values.
Exercise 1 (Methods) - Finding Maximum of Three Integers
findMax(int a, int b, int c)method finds the largest of three integers.- It uses
if-else ifstatements to compare the integers. - The method returns the largest integer.
Exercise 2 (Methods) - Checking Even Numbers
isEven(int num)method checks if a number is even.- It uses the modulus operator (
%) to see if the number is divisible by 2. - Returns
trueif even,falseotherwise.
Exercise 3 (Methods) - Calculating Rectangle Area
calculateArea(int length, int width)method calculates the area of a rectangle.- It multiplies length and width to get the area.
- The method returns the calculated area.
Decision-Making Statements
- Decision-making statements (like
if-else,switch) allow programs to make choices based on conditions.
Exercise 1 (Decision-Making) - Leap Year Check
- Checks if a year is a leap year.
- A year is a leap year if:
- Divisible by 4 but not by 100.
- Or divisible by 400.
Exercise 5 (Decision-Making) - Vowel/Consonant Check
- Checks if a character is a vowel or a consonant.
- Uses a
switchstatement to check multiple cases (vowels). - Prints "Vowel" for vowels and "Consonant" otherwise.
Inheritance
- Inheritance lets one class (subclass) acquire properties and methods of another class (superclass).
- The parent class contains common features; subclasses add specifics.
Exercise 1 (Inheritance) - Animal and Dog Example
Animalclass has amakeSound()method (generic sound).Dogclass inherits fromAnimaland overridesmakeSound()to produce "Bark."
Arrays
- An array stores elements of the same type in contiguous memory locations.
- Arrays are indexed from 0.
Exercise 2 (Arrays) - Searching an Array
search(int[] arr, int key)method searches for a key within an array.- It iterates through the array.
- Returns the index of the key if found; otherwise, returns -1.
Exercise 4 (Arrays) - Bubble Sort
bubbleSort(int[] arr)method sorts an array using bubble sort.- Compares adjacent elements and swaps them if the left is greater than the right.
- Repeats until the array is sorted.
Nested Loops
- Nested loops allow iteration over multiple dimensions or repeated patterns.
- The inner loop completes for each iteration of the outer loop.
Exercise 3 (Nested Loops) - Pyramid Pattern
- Generates a pyramid pattern using nested loops.
- The pattern's structure is formed by controlling spaces and asterisks in each row.
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Description
This quiz covers methods in programming, focusing on tasks such as finding the maximum of three integers, checking even numbers, and calculating the area of a rectangle. Additionally, it discusses decision-making statements that enable programs to make choices based on conditions. Test your understanding of these fundamental concepts in programming.
