When two threads access the same ArrayList object what is the outcome of the program?(a) Both are able to access the object(b) ConcurrentModificationException is thrown(c) One thread is able to access the object and second thread gets Null Pointer exception(d) One thread is able to access the object and second thread will wait till control is passed to the second oneThis question was addressed to me during a job interview.I need to ask this question from Data Structures-List in chapter java.util – The Collections Framework of Java

When two threads access the same ArrayList object what is the outcome

1.	When two threads access the same ArrayList object what is the outcome of the program?(a) Both are able to access the object(b) ConcurrentModificationException is thrown(c) One thread is able to access the object and second thread gets Null Pointer exception(d) One thread is able to access the object and second thread will wait till control is passed to the second oneThis question was addressed to me during a job interview.I need to ask this question from Data Structures-List in chapter java.util – The Collections Framework of Java
Answer» Right choice is (B) ConcurrentModificationException is thrown To explain I WOULD say: ArrayList is not SYNCHRONIZED. Vector is the synchronized DATA structure.

Discussion

No Comment Found

Related InterviewSolutions

Which of these methods can convert an object into a List?(a) SetList()(b) ConvertList()(c) singletonList()(d) CopyList()The question was posed to me in an online interview.Asked question is from Collection Algorithms in section java.util – The Collections Framework of Java
Which of these methods can randomize all elements in a list?(a) rand()(b) randomize()(c) shuffle()(d) ambiguous()I got this question by my college professor while I was bunking the class.This intriguing question originated from Collection Algorithms topic in section java.util – The Collections Framework of Java
Which of these methods sets every element of a List to a specified object?(a) set()(b) fill()(c) Complete()(d) add()I got this question in homework.This intriguing question comes from Collection Algorithms topic in division java.util – The Collections Framework of Java
Which of these is an incorrect form of using method max() to obtain a maximum element?(a) max(Collection c)(b) max(Collection c, Comparator comp)(c) max(Comparator comp)(d) max(List c)This question was addressed to me during an interview.This question is from Collection Algorithms in division java.util – The Collections Framework of Java
Which of these is a Basic interface that all other interface inherits?(a) Set(b) Array(c) List(d) CollectionThe question was asked in an interview for job.My question is based upon Collections Interface in section java.util – The Collections Framework of Java
Which of this interface must contain a unique element?(a) Set(b) List(c) Array(d) CollectionThis question was posed to me in final exam.I'm obligated to ask this question of Collections Interface topic in chapter java.util – The Collections Framework of Java
Which of these interface handle sequences?(a) Set(b) List(c) Comparator(d) CollectionThe question was asked during a job interview.This interesting question is from Collections Interface topic in chapter java.util – The Collections Framework of Java
Which of these interface declares core method that all collections will have?(a) set(b) EventListner(c) Comparator(d) CollectionI got this question in an international level competition.I want to ask this question from Collections Interface in division java.util – The Collections Framework of Java
Which of these method of Array class is used sort an array or its subset?(a) binarysort()(b) bubblesort()(c) sort()(d) insert()The question was asked in final exam.Question is from Java.util topic in section java.util – The Collections Framework of Java
Which of this method is used to make all elements of an equal to specified value?(a) add()(b) fill()(c) all()(d) set()This question was posed to me in an international level competition.My doubt is from Java.util in portion java.util – The Collections Framework of Java

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment