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I applied via Walk-in and was interviewed in Jul 2023. There were 4 interview rounds.
There is a hacker rank test for 60 minutes Link provided by the time of 1st round live screen share with hr taking screenshot for govt id proof.
Test has a 8 question in that 5 are mcqs and 2 are coding and 1 is SQL query.
Converts a camel case string to snake case.
Split the string by uppercase letters
Convert each word to lowercase
Join the words with underscores
A Java program using multithreading to print numbers from 1 to 10 in a specific pattern.
Create three threads and assign them to print numbers in a specific pattern
Use synchronization to ensure the correct order of printing
Use a loop to iterate from 1 to 10 and assign the numbers to the threads
Print the thread name and the assigned number in the desired format
To detect a loop in a LinkedList, we can use the Floyd's cycle-finding algorithm.
Initialize two pointers, slow and fast, both pointing to the head of the LinkedList.
Move slow pointer by one step and fast pointer by two steps at a time.
If there is a loop, the slow and fast pointers will eventually meet.
If either of the pointers reaches the end of the LinkedList, there is no loop.
Callable and Runnable are interfaces in Java used for concurrent programming. Callable returns a result and can throw an exception, while Runnable does not return a result or throw an exception.
Callable is a generic interface with a method called 'call()', while Runnable is a functional interface with a method called 'run()'.
Callable can return a result using the 'Future' interface, while Runnable cannot.
Callable can t...
Threads in Java allow concurrent execution of multiple tasks. They can be created in multiple ways.
Using the Thread class
Implementing the Runnable interface
Using the Executor framework
Using the Callable interface with ExecutorService
Reverse a linked list.
Had given 2 java question which one is medium and other one was easy.
I applied via Campus Placement and was interviewed in Oct 2023. There was 1 interview round.
Abstraction is the concept of hiding complex implementation details and showing only the necessary information. Encapsulation is bundling data and methods that operate on the data into a single unit.
Abstraction focuses on what an object does rather than how it does it
Encapsulation restricts access to some of an object's components, protecting the object's integrity
Abstraction allows for easier maintenance and modificat...
Primary key uniquely identifies a record in a table, while super key is a set of attributes that can uniquely identify a record.
Primary key is a subset of super key
Primary key cannot have NULL values, while super key can
Example: In a table 'Employee', 'EmployeeID' can be a primary key as it uniquely identifies each employee record, while 'EmployeeID, DepartmentID' can be a super key
Wissen Technology interview questions for popular designations
I applied via Naukri.com and was interviewed in Dec 2023. There were 2 interview rounds.
6 Objective Questions, 2 Java Coding Question, One Sql query Question 1. Coding: Problem on Josephus Range Game, 2. Coding: Unequal Equal segments.
A program to split an array of strings into smaller arrays based on a given split size.
Iterate through the array and create a new subarray every split size elements
Use array slicing or a loop to extract the subarrays
Handle cases where the split size is larger than the array length
Program to flatten multi dimension Object[] array to Integer[]
Use recursion to iterate through the array and flatten each element
Check if each element is an array or an integer
If it's an array, recursively flatten it
If it's an integer, add it to the result array
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1 hr test contains 2 coding questions and 1 SQL question
It is online test shared to email, contains mcq and coding questions
I applied via Recruitment Consulltant
DSA question on kaprekar constant
I applied via Naukri.com and was interviewed in Jun 2024. There was 1 interview round.
DSA and Algo. Questions on Arrays and Strings.
I was interviewed in Apr 2024.
It was on online platform consists of 7 questions, 2 coding each of 40 marks, 1 SQL query- 20 marks and 4 MCQ's 5 marks each
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The duration of Wissen Technology interview process can vary, but typically it takes about less than 2 weeks to complete.
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