Quiz 2.1: Exceptions
Test Your Knowledge on Exceptions in Java!
Are you ready to challenge yourself and enhance your understanding of exceptions in Java? This quiz tests your knowledge on exception handling and error management in the Java programming language. Perfect for students and developers alike, it will help you solidify your understanding.
- 10 engaging questions
- Multiple choice and checkbox formats
- Learn while you play!
Se foloseste o exceptie atunci cand:
Vrem ca o bucata de cod sa faca exceptie de la niste reguli
Programul ajunge intr-o stare in care runtime-ul nu mai poate decide cum sa continue functionarea normala, delegandu-ne responsabilitatea de a decide ce trebuie sa se intample in continuare
Vrem sa implementam ramificari in executia programului pentru a exprima reguli de business logic
Intentionam sa inchidem resursele folosite si sa incheiem executia programului
In Java, exceptiile si erorile sunt folosite in mecanismul general de:
Resource management
I/O
Execution branching
Error handling
In Java, exceptiile si erorile reprezinta acelasi lucru:
True
False
Toate exceptiile si erorile mostenesc clasa:
Trouble
DoubleTrouble
Throwable
Threadable
Exception:
Mosteneste clasa Error
Este o interfata
Este o clasa
Poate fi instantiata
"is-a" Throwable
Este clasa parinte pentru toate erorile
Este mostenita de toate exceptiile
Este indicat sa nu fie folosita direct in clauze "catch"
Are constructori overloaded
Nu implementeaza Serializable
O eroare:
Denota o situatie exceptionala din care nu putem reveni la executia normala a programului
Este modelata cu ajutorul clasei Error
Este un Throwable
Aduce masina virtuala intr-o stare in care ar trebui sa-si incheie executia
Un exemplu de eroare binecunoscuta este:
ArrayIndexOutOfBoundsError
OutOfMemoryError
StackOverflowError
SqlError
IOException
Atunci cand facem prea multe apeluri de metode (de exemplu, apeluri recursive fara numar ;) ), se arunca urmatoarea eroare:
OutOfMemoryError
StackOverflowError
VirtualMachineError
Error
Apelurile de metode (call frames), impreuna cu variabilele locale de tip primitiv, se memoreaza:
Pe stack
In heap
In ROM
In VM
Obiectele sunt memorate:
Pe stack
In heap
Pe SSD
In DB
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