Core java interview Questions You'll Most Likely Be Asked (Second Edition)

String Handling
What is a string literal? Give an example.
What will be the output of the following code? Explain why.
What will be the output when the following code is executed?
What will be the output of the following code snippet?
What are the various ways of assigning a string literal to a
String variable?
Name some commonly used methods from the String class.
What is the difference between StringBuffer and StringBuilder?
Write a code sample that reverses a String without using a
loop.
Write a code sample that demonstrates how you can convert a
String to uppercase.
Explain how you can convert an Integer to a String.
Generics
What happens when you compile and run the following code?
Will Line 1 in the following line of code compile? If not, state
the reasons.
Explain the issue with the following code.
Explain what additional code is required to make the code
snippet below valid–
Explain Bounded Generic Types with a code sample.
Collec ons

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What are the four main interfaces in the Java Collection API.
How will you search for a specific element in an array?
Which collection would you choose if do not want duplicates
and do not care about the order?
Explain with a code sample how you can remove the head of a
queue.
Which collection implementation allows growing or shrinking
its size and provides indexed access to its elements?
Explain the Queue interface.
Explain the Comparator interface.
Explain some of the methods on the Queue Interface.
Is it possible to mix generic and non–generic collections? If so,
give example.
What are some of the important methods on the Collection
interface?