Memory optimization for JVMs...
Java Programmer Interview Questions
258 java programmer interview questions shared by candidates
core java , microservices, design pattern
Whats the subject you don't like in your course and why
Strength and Weakness
rotate an array in-place by n places, sort array using any algo, binary search on the same array, design patterns, collections, discussion about projects in my company.
Algorithms
Designs patters, a lot of it.
How many years of experience do you have?
Second Round Q)Two interfaces have same method declaration. Both the interfaces are implemented by class.. which of the two method will be overridden? Q)Find output of: try{ int x=5/0;} catch(Exception e){ System.out.println("Exception");} catch (ArithmeticException ae) { System.out.println("ArithmeticException occured!"); } Q)signature of a function vs method declaration Q)Will the code perform overloading? class A{ public void print(){ System.out.println("Void Print"); } public int print(){ System.out.println("Integer Print"); return 8; } } Q)Will the code perform overriding? class A{ public void print(){ System.out.println("Void Print"); } } class B extends A{ public int print(){ System.out.println("Integer Print"); return 8; } } Q) what are the OOPS concept that can seen in the following code(blank/empty class)? class A{} Q) Check whether a number is odd or even without arithmetic operator. Hint: Typecast to string. Check last digit Q) Default access specifiers of class methods and variables Q)Real time example of abstraction, encapsulation, inheritance, data hiding. Example class abstract phone with child class mobile and landline. Write properties and methods. Q) Class A { public void method1(){} } Class B extends B { public void method2(){} } which is possible? A obj=new B(); or B obj=new A(); Q) Which of the following datatypes are mutable and how and why? string, int, float, double, char Q) Can a interface extend more than 1 interface? Q) Can a class implement more than 1 interface? Q) WAP input: aaa1bbb2ccccc3 ouput: aabcc Q) which operator is overloaded in java? Q) java advanatages over c/c++? Q) Name diifferent ways to create objects in java Q) find common objects in list {1,{1,2},{1,2,3}} Next Level of Coding Interview Q) WAP to input Username & Password of user. Check whether is username and authenticated; if not the increment the counter by 1. Maximum three chances are allowed for the same IP address request. If counter is equal to 3, block all the requests from the IP Address
Aptitude questions
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