Java Online Quiz – Test your knowledge in 7 min
This Java online quiz will help you to clear your java concepts and also check your java knowledge. It will increase your confidence while appearing for Java interview.
Bookmark other java quizzes as well in the series of 7 java quizzes. Some of them are as below:
So, All The Best for this Java Online Quiz.
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What guarantees type-safety in a collection?CorrectIncorrect
HashSet internally uses?CorrectIncorrect
The most used interfaces from the collection framework are?CorrectIncorrect
The root interface of Java collection framework hierarchy is –CorrectIncorrect
Which of those is synchronized?CorrectIncorrect
ArrayList implements that of the following?CorrectIncorrect
Which of those permits the storage of the many null values?CorrectIncorrect
nextIndex() and previousIndex() are methods of which interface?CorrectIncorrect
Vector extends that of these?CorrectIncorrect
In Iterator, nextElement() method of Enumeration has been changed to:CorrectIncorrect
Enumeration returned by Vector is?CorrectIncorrect
From Java five onwards, that one among these is suggested to replace Hashtable?CorrectIncorrect
Which doesn’t permit to store a null value?CorrectIncorrect
Iterator returned by Vector is?CorrectIncorrect
What describes an algorithm performs in best, average or worse case scenarios?CorrectIncorrect
State the search time complexity of an ordered array.CorrectIncorrect
Name the map that should be kept in a multi-threading environment to keep up the natural order of keys?CorrectIncorrect
Which list class should be most popular in a multi-threading environment, considering performance constraint?CorrectIncorrect
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