BASIC CORE JAVA INTERVIEW QUESTIONS AND ANSWERS FOR FRESHERS

BASIC CORE JAVA INTERVIEW QUESTIONS AND ANSWERS FOR FRESHERS


#BASIC #CORE #JAVA #INTERVIEW #QUESTIONS #AND #ANSWERS #FOR #FRESHERS - 4
4. Can you explain to me traversing through a collector using an Iterator?

The interviewer is looking to see how much hands on experience the interviewee has with actually writing Java code. It is important to be confident here, and explain your methodology clearly. In addition, interviewees would do well to clearly explain their logical process as they walk through each step.

Each element in the collection can be accessed by using Iterators no matter how they are organized in the collector. The Iterator can be implemented differently for each collection. To use an Iterator to traverse through a collector:

• Obtain an Iterator by calling the collections iterator () method to the start of the collection
• Set up a loop that makes a call to hasNext()
• Have the loop iterate as long as hasNext() returns true
• Within the loop, obtain each element by calling next()
• Use the remove() method to remove the current element in the iteration

#BASIC #CORE #JAVA #INTERVIEW #QUESTIONS #AND #ANSWERS #FOR #FRESHERS - 5



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