Core java - Interview Questions and Answers for 'Alibaba' | Search Interview Question

Core java - Interview Questions and Answers for 'Alibaba' - 2 question(s) found - Order By Newest

Q1. Which collection stores element in insertion order ?

Core Java

Ans. LinkedList maintains the insertion order in collection.

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Related Questions

What is the difference between ArrayList and LinkedList ?

If you are given a choice to use either ArrayList and LinkedList, Which one would you use and Why ?

Difference between HashMap and Hashtable?

Difference between TreeMap and HashMap ?

Can you provide some implementation of a Dictionary having large number of words ?

Will this code give error if i try to add two heterogeneous elements in the arraylist. ? and Why ?

How is Hashmap internally implemented in Java ?

What is a ConcurrentHashMap ?

Collections.sort can only be performed on ..

a. Set
b. List
c. Map
d. Any Collection implementation

Why HashTable has been deprecated ?

Frequently asked in Alibaba (Based on 2 feedback)

Q2. What is the best Memory setting for JVM ?

Core Java

Ans. In Java JVM memory settings is done by use the arguments -Xms -Xmx. Use M or G after the numbers for indicating Megs and Gigs of bytes respectively. -Xms indicates the minimum and -Xmx the maximum.

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Related Questions

What are different ways to create String Object? Explain.

Does garbage collection guarantee that a program will not run out of memory?

Describe, in general, how java's garbage collector works ?

Describe what happens when an object is created in Java ?

What are various types of Class loaders used by JVM ?

Why two types of memory - stack and heap are required by Java ?

Should we override finalize method ?

What are strong, soft, weak and phantom references in Java ?

Which memory areas does instance and static variables use ?

Can we call the garbage collector explicitly ?

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