Exception handling
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An exception is an unpredictable event that requires special processing. Exception handlers are sections of code that execute when exceptions occur, allowing programs to handle errors gracefully rather than crashing. The try-catch statement monitors a block of code for exceptions, with catch blocks handling specific exception types. If an exception is thrown within the try block, the corresponding catch block executes to process the exception before the program continues.
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The document discusses exceptions and exception handling in programs. It defines an exception as a problem that arises during program execution, such as attempting to divide by zero. Exception handling allows programs to respond to errors in a more organized way using try and catch blocks. It describes four approaches programs can take to respond to errors: crashing, informing the user and exiting, informing the user to attempt recovery, or taking corrective action without disturbing the user. The key aspects of exception handling are try blocks to detect where exceptions may occur, catch blocks to determine the type of exception and how to handle it, and throw to raise an exception from anywhere in the code.
unit 4 msbte syallbus for sem 4 2024-2025
The Intel 8086 microprocessor, designed by Intel in the late 1970s, is an 8-bit/16-bit microprocessor and the first member of the x86 family of microprocessors1. Here’s a brief overview of its internal architecture:
Complex Instruction Set Computer (CISC) Architecture: The 8086 microprocessor is based on a CISC architecture, which supports a wide range of instructions, many of which can perform multiple operations in a single instruction1.
Bus Interface Unit (BIU): The BIU is responsible for fetching instructions from memory and decoding them, while also managing data transfer between the microprocessor and memory or I/O devices1.
Execution Unit (EU): The EU executes the instructions1.
Memory Segmentation: The 8086 microprocessor has a segmented memory architecture, which means that memory is divided into segments that are addressed using both a segment register and an offset1.
Registers: The 8086 microprocessor has a rich set of registers, including general-purpose registers, segment registers, and special registers
Lecture 22 - Error Handling
C Programming Language is the most popular computer language and most used programming language till now. It is very simple and elegant language. This lecture series will give you basic concepts of structured programming language with C.
Exception handling
Exception handling in Java allows programs to deal with errors and unexpected conditions gracefully. The try block encloses code that might throw exceptions. When an exception is thrown, the runtime system searches the call stack for a catch block that can handle the exception. The finally block always executes after the try and catch blocks complete to ensure cleanup code runs. Custom exceptions can be created by extending the Exception class.
Interface andexceptions
An exception occurs when the normal flow of a program is disrupted, such as dividing by zero or accessing an out-of-bounds array element. Exceptions are handled using try-catch blocks to catch specific exceptions or finally blocks to clean up resources. Methods can throw exceptions using the throw statement or specify thrown exceptions in the method declaration using throws. Programmers can also create custom exception classes by extending the Exception class.
Exception Handling in UiPath.pptx
The document discusses error and exception handling in UiPath Studio. It defines different types of errors like syntax errors and exceptions. Exceptions are events caught and handled by the program. Common exceptions that may occur in UiPath projects are discussed, including NullReferenceException, IndexOutOfRangeException, and SelectorNotFoundException. The document also covers different exception handling techniques in UiPath like TryCatch, Throw, Rethrow, and the ContinueOnError property. Finally, it discusses the Global Exception Handler used to handle unexpected exceptions.
UNIT III 2021R.pptx
The document discusses exception handling and multithreading in Java. It defines exceptions as unexpected events that occur during program execution and disrupt normal flow. There are three types of exceptions: checked exceptions which occur at compile time; unchecked exceptions which occur at runtime; and errors which are problems beyond a program's control. The try, catch, finally keywords are used to handle exceptions. The document also discusses creating threads and synchronization in multithreaded programming.
UNIT III 2021R.pptx
The document discusses exception handling and multithreading in Java. It begins by defining exceptions as unexpected events that occur during program execution and disrupt normal flow. There are three categories of exceptions: checked exceptions which occur at compile time; unchecked exceptions which occur at runtime; and errors which are problems beyond a program's control. The document then covers how to handle exceptions using try, catch, finally and throw keywords. It provides examples of built-in and user-defined exceptions. The document concludes by explaining Java's multithreading model, how to create and manage threads, set thread priorities and states, and techniques for inter-thread communication.
Exception Handling in JAVA
This document discusses exception handling in Java. It defines exceptions as abnormal conditions that disrupt normal program flow. Exception handling allows programs to gracefully handle runtime errors. The key aspects covered include the exception hierarchy, try-catch-finally syntax, checked and unchecked exceptions, and creating user-defined exceptions.
How to handle exceptions in Java Technology
What is exception ? How we use exception handling in Java ? Take some latest idea about exception handling in java ? Exception is Run Time error.
Exception handling
Exception handling in C++ provides a standard mechanism for processing errors. Exceptions indicate problems during a program's execution and exception handling allows a program to continue running or notify the user of problems. The key components are try blocks for code that could cause exceptions, catch handlers to handle specific exceptions, and stack unwinding to search for exception handlers up the call stack if an exception is not caught. Derived exception classes enable related errors to be caught together under a base class.
Java Exception handling
Exception handling in Java provides a robust way to handle errors and exceptions that occur during program execution. The try-catch block allows code to be wrapped in a try block to protect it, while catch blocks handle any exceptions. Multiple catch blocks can be used to handle different exception types. The throw keyword is used to manually throw an exception, while throws is used to indicate unhandled exceptions in a method signature. Finally, the finally block is used for cleanup and always executes regardless of exceptions.
Lecture 1 Try Throw Catch.pptx
Three key points about exception handling in C++ are:
1. Exceptions are used to handle runtime errors or exceptions and allow a program to continue running or exit gracefully rather than crashing.
2. Exception handling uses the try, throw, and catch keywords where code that can throw exceptions is wrapped in a try block, exceptions are thrown using throw, and catch blocks catch the exceptions.
3. When an exception is thrown in a try block, it bubbles up the call stack until a catch block that matches the exception type is found, allowing the exception to be handled.
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This document discusses techniques for deterministic replay of multithreaded programs. It describes how recording shared memory ordering information can enable replay that reproduces data races and concurrency bugs. Specifically, it outlines using a directory-based approach to track read-write dependencies between threads and reduce the log size through transitive reduction of dependencies.
Multi threaded rtos
Multi-threaded processor architectures can improve parallelism at both the instruction-level and thread-level. Simultaneous multi-threading (SMT) allows multiple threads to issue and execute instructions simultaneously by dynamically sharing processor resources. SMT reduces underutilization of functional units and improves performance over multiprocessors. Multi-threaded designs are well-suited for digital signal processing applications that can benefit from parallel execution at multiple levels. Examples of multi-threaded real-time operating systems that support parallel DSP applications are discussed.
Recursion
Recursion involves functions that call themselves during execution. This document discusses recursive functions like factorial, Fibonacci sequence, power, and printing patterns. Recursive functions have a base case that stops the recursion. The factorial function is defined recursively as n! = n * (n-1)!, and this recursive definition is evaluated step-by-step for fact(4). Recursive functions can also be used to define sequences like Fibonacci numbers.
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Big picture of data mining
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This document discusses how Analysis Services caching works and provides strategies for warming the Storage Engine cache and Formula Engine cache. It explains that the Storage Engine handles data retrieval from disk while the Formula Engine determines which data is needed for queries. Caching can improve performance but requires consideration of memory usage, cache structures, and data granularity. The document recommends using the CREATE CACHE statement and running regular queries to pre-populate the caches, while being mindful of how security and non-deterministic elements can impact cache sharing and scoping. Automating cache warming through SQL Server Agent jobs or SSIS packages is suggested.
Optimizing shared caches in chip multiprocessors
Chip multiprocessors, which place multiple processors on a single chip, have become common in modern processors. There are different approaches to managing caches in chip multiprocessors, including private caches for each processor or shared caches. The optimal approach balances factors like interconnect traffic, duplication of data, load balancing, and cache hit rates.
Directory based cache coherence
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Abstract data types
This document discusses abstract data types (ADTs) and their implementation in various programming languages. It covers the key concepts of ADTs including data abstraction, encapsulation, information hiding, and defining the public interface separately from the private implementation. It provides examples of ADTs implemented using modules in Modula-2, packages in Ada, classes in C++, generics in Java and C#, and classes in Ruby. Parameterized and encapsulation constructs are also discussed as techniques for implementing and organizing ADTs.
Abstraction file
This document discusses the key concepts of object-oriented programming including abstraction, encapsulation, classes and objects. It defines abstraction as focusing on the essential characteristics of an object and hiding unnecessary details. Encapsulation hides the implementation of an object's methods and data within its class. A class defines both the data and behaviors of an object through its public interface and private implementation. Objects are instantiations of classes that come to life through constructors and die through destructors while maintaining data integrity.
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Object model
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Abstract class
Abstract classes and interfaces allow for abstraction and polymorphism in object-oriented design. Abstract classes can contain both abstract and concrete methods, while interfaces only contain abstract methods. Abstract classes are used to provide a common definition for subclasses through inheritance, while interfaces define a contract for implementing classes to follow. Both support polymorphism by allowing subclasses/implementing classes to determine the specific implementation for abstract methods.
Object oriented analysis
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The document discusses several programming paradigms including single process, multi process, and multi-core/multi-thread. It then covers topics such as processes, threads, synchronization, and liveness issues in concurrent programming including deadlock, starvation and livelock. Processes run independently while threads share data and scheduling. Synchronization prevents interference and inconsistencies between threads accessing shared data. Liveness issues can cause programs to halt indefinitely.
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Exception handling
- 1. 1 An Exception is… An unusual, often unpredictable event, detectable by software or hardware, that requires special processing An exception handler is a section of program code that is executed when a particular exception occurs.
- 2. 2 Why have exception handlers? With no exception handler for an exception, your program ends at the point of the exception (with no user understandable data from the O/S) With an exception handler, you can handle the unusual condition in an understandable way
- 3. 3 Try/Catch/Throw Try: The block of code monitored for exceptions Catch: The block of code following the try block handles an exception type Throw: When an exception is detected, you throw an exception type
- 4. 4 The try-catch Statement try Block (exception can be thrown within this block or any called functions) catch (FormalParameter1) Block catch (FormalParameter2) TryCatchStatement How one part of the program catches and processes the exception that another part of the program throws. FormalParameter DataType VariableName …
- 5. 5 Execution of try-catch No statements throw an exception Statement following entire try-catch statement A statement throws an exception Exception Handler Statements to deal with exception are executed Control moves directly to exception handler
- 6. 6 O/S (Unix) or you can throw exceptions O/S thrown examples No storage available for new request, divide by zero User thrown exceptions Using the throw statement