Java interview questions

Sample Java questions

1. Q1Medium

   What does LinkedHashMap accessOrder=true change?

   • A It links entries in access order
   • B It prevents removals
   • C It disables hashing
   • D It sorts keys alphabetically
2. Q2Medium

   Which Set operation keeps only elements present in both sets?

   • A intersectOnly()
   • B common()
   • C keepBoth()
   • D retainAll()
3. Q3Medium

   Which method creates a reversed view/order comparator from an existing Comparator?

   • A reverseComparatorOnly()
   • B reversed()
   • C backward()
   • D invertSort()
4. Q4Medium

   What does Collections.binarySearch require for meaningful results on a list?

   • A The list must contain no duplicates
   • B The list must be immutable
   • C The list must be sorted according to the same ordering
   • D The list must be a Set
5. Q5Medium

   What is a common safe way to compare two int values in a Comparator?

   • A a - b always
   • B Integer.compare(a,b)
   • C a.equals(b)
   • D String.valueOf(a).compareTo(String.valueOf(b))

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