Podcast
Questions and Answers
What exception is thrown when an invalid index is accessed in a list or array?
What exception is thrown when an invalid index is accessed in a list or array?
Which of the following is NOT a characteristic of a function in Java?
Which of the following is NOT a characteristic of a function in Java?
Which of the following exceptions is thrown when trying to access an array with an invalid index?
Which of the following exceptions is thrown when trying to access an array with an invalid index?
Which exception indicates that a thread has been interrupted while waiting or sleeping?
Which exception indicates that a thread has been interrupted while waiting or sleeping?
Signup and view all the answers
What type of array allows for traversal using an enhanced for loop in Java?
What type of array allows for traversal using an enhanced for loop in Java?
Signup and view all the answers
What exception would most likely be thrown due to excessive recursion?
What exception would most likely be thrown due to excessive recursion?
Signup and view all the answers
What keyword is used to specify the value to be returned by a method in Java?
What keyword is used to specify the value to be returned by a method in Java?
Signup and view all the answers
What occurs when an input/output operation fails or is interrupted?
What occurs when an input/output operation fails or is interrupted?
Signup and view all the answers
When is the UnsupportedOperationException thrown?
When is the UnsupportedOperationException thrown?
Signup and view all the answers
Which exception is thrown by the JVM when it runs out of memory?
Which exception is thrown by the JVM when it runs out of memory?
Signup and view all the answers
Which of the following correctly describes formal and actual parameters in Java?
Which of the following correctly describes formal and actual parameters in Java?
Signup and view all the answers
Which method can be used to convert a multidimensional array into a string representation?
Which method can be used to convert a multidimensional array into a string representation?
Signup and view all the answers
What exception is specifically thrown when a file with the specified pathname does not exist?
What exception is specifically thrown when a file with the specified pathname does not exist?
Signup and view all the answers
What does code reusability aim to achieve in programming?
What does code reusability aim to achieve in programming?
Signup and view all the answers
Which exception cannot be instantiated because it represents a class definition that is missing?
Which exception cannot be instantiated because it represents a class definition that is missing?
Signup and view all the answers
Which exception is thrown when an operation tries to use a null where an object is required?
Which exception is thrown when an operation tries to use a null where an object is required?
Signup and view all the answers
What is the primary purpose of the function Arrays.sort(array)?
What is the primary purpose of the function Arrays.sort(array)?
Signup and view all the answers
Which of the following describes a function with no parameters but with a return value?
Which of the following describes a function with no parameters but with a return value?
Signup and view all the answers
What will Arrays.binarySearch(array, key) return if the key is not found in the sorted array?
What will Arrays.binarySearch(array, key) return if the key is not found in the sorted array?
Signup and view all the answers
What does the function Arrays.equals(array1, array2) check?
What does the function Arrays.equals(array1, array2) check?
Signup and view all the answers
What is the role of void methods in Java?
What is the role of void methods in Java?
Signup and view all the answers
What does the function Arrays.copyOf(array, newLength) do?
What does the function Arrays.copyOf(array, newLength) do?
Signup and view all the answers
Which statement correctly defines Arrays.deepEquals(array1, array2)?
Which statement correctly defines Arrays.deepEquals(array1, array2)?
Signup and view all the answers
When would you typically use Arrays.parallelSort(array)?
When would you typically use Arrays.parallelSort(array)?
Signup and view all the answers
What does an index in an array represent?
What does an index in an array represent?
Signup and view all the answers
What is required when declaring an array in Java?
What is required when declaring an array in Java?
Signup and view all the answers
Which of the following is NOT an example of array initialization?
Which of the following is NOT an example of array initialization?
Signup and view all the answers
What does the try statement in Java allow you to do?
What does the try statement in Java allow you to do?
Signup and view all the answers
What is a key characteristic of arrays in Java?
What is a key characteristic of arrays in Java?
Signup and view all the answers
Which statement correctly accesses the third element of an array named 'array'?
Which statement correctly accesses the third element of an array named 'array'?
Signup and view all the answers
In what scenario is a catch statement used in Java?
In what scenario is a catch statement used in Java?
Signup and view all the answers
Which of the following best describes the versatility of arrays?
Which of the following best describes the versatility of arrays?
Signup and view all the answers
Allows to stored data element into single entity
Allows to stored data element into single entity
Signup and view all the answers
Iterate and processing Commonly used in loop to iterate over elements and perform operations on them
Iterate and processing Commonly used in loop to iterate over elements and perform operations on them
Signup and view all the answers
Can store elements of any data type
Can store elements of any data type
Signup and view all the answers
In Java arrays it has have a fix size after initialization. But you can use array list to handle varying amount of data dynamically
In Java arrays it has have a fix size after initialization. But you can use array list to handle varying amount of data dynamically
Signup and view all the answers
Foundation use in many algorithms , data structures and programming techniques
Foundation use in many algorithms , data structures and programming techniques
Signup and view all the answers
The technical term ( throw an exception ) for when an error occurs java will normally stop and generate an error message
The technical term ( throw an exception ) for when an error occurs java will normally stop and generate an error message
Signup and view all the answers
allows to define a block of code to be tested for errors while itis being executed
allows to define a block of code to be tested for errors while itis being executed
Signup and view all the answers
allows to define a block of code to be executed if an error occurs in the try bloc
allows to define a block of code to be executed if an error occurs in the try bloc
Signup and view all the answers
thrown to indicate that an
assertion has failed
thrown to indicate that an assertion has failed
Signup and view all the answers
typically known as methods, are
fundamental to its structure, enabling the
development of modular, reusable, and
maintainable code
typically known as methods, are fundamental to its structure, enabling the development of modular, reusable, and maintainable code
Signup and view all the answers
breaking complex tasks into
smaller, manageable unit
breaking complex tasks into smaller, manageable unit
Signup and view all the answers
reducing the redundancy
by reusing code across different paths of
the program
reducing the redundancy by reusing code across different paths of the program
Signup and view all the answers
simplifying
debugging and updating pro
simplifying debugging and updating pro
Signup and view all the answers
function is defined
within a class and has a return type, a
name, and parameter
function is defined within a class and has a return type, a name, and parameter
Signup and view all the answers
generates a hash code for the array.
generates a hash code for the array.
Signup and view all the answers
array.length- returns the size of an
arra
array.length- returns the size of an arra
Signup and view all the answers
utility methods in java that is provided by the import java.util.Arrays. These functions are
used to manipulate and process array
utility methods in java that is provided by the import java.util.Arrays. These functions are used to manipulate and process array
Signup and view all the answers
converts an
array into a stream for functional
programming.
converts an array into a stream for functional programming.
Signup and view all the answers
fills the entire array with a specified value
fills the entire array with a specified value
Signup and view all the answers
copies a specific range of elements
into a new array. Extracting
subarrays
copies a specific range of elements into a new array. Extracting subarrays
Signup and view all the answers
Signup and view all the answers
Study Notes
Intermediate Programming - Arrays
- Arrays are fundamental data structures in Java, storing collections of elements of the same type.
- Elements are items stored in an array.
- Indexes are numerical locations of elements, starting from 0.
- Declaration involves specifying the element type, array name, and size.
- Example:
int[] student = new int[100];(allocates memory) - Example:
int[] array = {1, 2, 3, 4, 5};(initializes and allocates)
- Example:
- Accessing elements: Use their indices.
- Example:
int x = array[2];(assigns value at index 2 to x)
- Example:
- Enhanced for loop (each-loop) iterates through arrays/collections more simply.
- Multidimensional arrays are 2D arrays (like matrices).
- Example:
int[][] matrix = new int[rowSize][colSize];
- Example:
- Arrays provide efficient storage and retrieval of elements.
Intermediate Programming - Java Exceptions
- Java Exceptions are errors handled during runtime (throw/exception/error).
- Java uses try-catch blocks to handle potential errors.
-
try: A block of code that may cause errors. -
catch: A block executed if an error occurs within thetryblock.
-
- Compile-time exceptions (checked): Errors like
IOException(input/output error) andFileNotFoundException(file not found) need to be handled. - Runtime exceptions (unchecked): Errors like
NullPointerException(trying to use a null object) andArrayIndexOutOfBoundsException(invalid array index). - Other common exceptions include
StringIndexOutOfBoundsException(invalid string index) andNumberFormatException(invalid numeric conversion). - Exceptions can be thrown to handle various issues like invalid data or resource problems.
Intermediate Programming - Java Functions/Methods
- Functions (methods) are fundamental to Java's structure, enabling modular, reusable code.
- Methods can have parameters (input values) for greater flexibility.
- Methods can return values (results) to the caller; void methods don't return any value.
- Functions with no parameters, but return values - provide useful results independent of data input.
- Functions with parameters; no return values - used for tasks independent of returned data.
- Functions with parameters and return values provide methods that use input data and return a useful calculation.
- Functions are defined within a class and use a return type, name, and parameters.
- Calling functions: Using their names, providing the required data.
Intermediate Programming - Java Built-in Functions
- Arrays.toString() and Arrays.deepToString() convert arrays into readable strings, useful for debugging.
- Arrays.sort() sorts elements in ascending order.
- Arrays.parallelSort() uses multiple threads to sort larger arrays.
- Arrays.binarySearch() searches for a key in a sorted array and returns the index (or a negative value if not found).
- Arrays.equals() and Arrays.deepEquals() check if one-dimensional or multi-dimensional arrays are equal, respectively. Copying arrays:
- Arrays.copyOf(), Arrays.copyOfRange() - for creating copies of arrays with modifications and ranges.
- Filling arrays: Arrays.fill() to fill an entire array with a given value.
- Hashing arrays: Arrays.hashCode() to generate a hash code for arrays.
- Using streams (Arrays.stream()) for functional programming with arrays.
- Array length (using
array.length) - Reflection-Based Utilities (for accessing array elements and length dynamically).
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Related Documents
Description
This quiz covers fundamental concepts of arrays and exceptions in Java. It includes topics such as declaration, accessing elements, and error handling with try-catch blocks. Test your knowledge on Java's data structures and runtime error management.
