Carvia Tech July 24, 5 min read 5, views. What is idempotent operation? What methods should be made idempotent? What is Polymorphism? What is Abstraction, give a practical example. Catch NPE first and Exception in last, will that work? Discuss the exception hierarchy. What are the inheritance rules for Exceptions? Custom exceptions, how will you create one? Multiple inheritance in Java? How does Java 8 address this? Difference between Overriding and Overloading a method. How to swap two numbers without a temporary variable?
Discuss XOR approach. Which one is better - extending Thread class or implementing Runnable interface. Check if the given sentence is Pangram or not. Calculate Fibonacci series in Java using recursion and iterative approach. Check if the given number is a palindrome or not. Write a program to check if the given number is Armstrong number in Java. Write a program to reverse a string using recursion in Java. Write a Java program to check if two strings are anagrams.
Find two numbers of which the product is maximum in an array. Find first not-repeating character by iterating through the length of the string only once and by using constant space. I want to read all input to the command from file1 direct all output to file2 and error to file 3, how can I achieve this?
How to start a process in background mode, so that it keeps running even after terminal is closed. Employee and Department table - all employees from employee table and only departments that exists for an employee from department table. Left outer join. Find all those customers who have not placed any order yet. There are two tables Customer and Order, Order table contains foreign key to Customer table.
Jenkins, Regression Test, etc. How to seamlessly deploy to AWS ec2 cloud upon single commit in version control. SDET Java Interview pattern and collection of questions covering SDET coding challenges, automation testing concepts, functional, api, integration, performance and security testing, junit5, testng, jmeter, selenium and rest assured. Basic Concepts What is idempotent operation?
API automation. How will you make sure that main thread is the last one to exit? What is the difference between them? Enumerator vs Iterator? Which one is thread safe? Can collection classes be made serializable. How to do that? Error and exception difference with an example. How will you compare two java objects?
What is method overloading in Java? What is method overriding in Java? Difference between Overriding and Overloading a method Inheritance vs Composition in Java How to swap two numbers without a temporary variable? Coding Problems Check if the given sentence is Pangram or not Calculate Fibonacci series in Java using recursion and iterative approach How to reverse a number using Java Check if the given number is a palindrome or not Write a program to check if the given number is Armstrong number in Java Write a program to reverse a string using recursion in Java Write a Java program to check if two strings are anagrams Searching an element from a sorted and rotated array.
Reverse the ordering of words in a string Check if a given number is Prime or not Check whether given number is even or odd. Algorithms and DS What are different sorting algorithms How to find the relative efficiency of a given algorithms Find first not-repeating character by iterating through the length of the string only once and by using constant space.
Print prime numbers up to x Implement a stack data structure. Which one is better for QA? TestNG hierarchy - Tests, suites, classes, etc. Parameterization of tests in TestNG and data providers.
TestNG Listeners. How can these listeners be helpful. How will you enable password less SSH login into server machine? Continuously monitor last lines of a log file. How to connect to a remote server and execute certain commands. How does password less login works? At a higher level. How to find size of current directory?
How to check free disc space and memory in Unix? How to list all running processes and see their cpu utilization? What are different UNIX file permissions?
How to create a alias for a command in unix How to setup public key authentication passwordless login on unix using ssh? How to count lines and words in a text file. How to get my IP address in unix How a regular user can execute a command as an administrator. Database and SQL Employee and Department table - all employees from employee table and only departments that exists for an employee from department table.
How to delete duplicate records from a given table. How to setup a build pipeline in jenkins How to seamlessly deploy to AWS ec2 cloud upon single commit in version control. What are different areas you will cover? What is vulnerability, exploit and threat? What are top vulnerabilities in a web application? Which guidelines will you follow for security testing a web application? SDET Interviews SDET Java Interview pattern and collection of questions covering SDET coding challenges, automation testing concepts, functional, api, integration, performance and security testing, junit5, testng, jmeter, selenium and rest assured Last updated 1 week ago.
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