Jocata Database Support Engineer Interview Questions and Answers

General Aptitude Test.

Q1. One to one discussion about OOPS, Hibernate, Java.
Add your answer
Q2. What is one-one mapping.
Ans. 
One-one mapping is a relationship between two sets where each element of one set is associated with exactly one element of the other set.
• Each element in the first set maps to exactly one element in the second set.

• No two elements in the first set map to the same element in the second set.

• Example: Mapping employee IDs to employee names in a database.
Answered by AI
Add your answer
Q3. Explain Inheritance
Ans. 
Inheritance is a concept in object-oriented programming where a class inherits properties and behaviors from another class.
• Allows a class to inherit attributes and methods from another class

• Promotes code reusability and reduces redundancy

• Creates a parent-child relationship between classes

• Derived class can override or extend the functionality of the base class

• Example: Class 'Car' can inherit from class 'Vehicle' and inh...read more
Answered by AI
Add your answer
Q4. Select 2nd top salary.
Add your answer

Easy test on 2 ques of coding

Q1. Java and AQL ques
Add your answer
Q2. Aptitude and DSA
Add your answer

Q1. Quite lengthy interview with many fresher Java question and logical questions. Overall was good experience.
Add your answer

Q1. Easy interview with no hard questions
Add your answer

Aptitude test(Quants+Reasoning+English)

1 Beginner+ 1 Intermediate

Q1. Technical CSE & IT Questions
Add your answer
Q2. HR Round
Add your answer

Q1. Write a program to reverse a string.
Ans. 
A program to reverse a string
• Iterate through the string from end to start and append each character to a new string

• Use built-in functions like reverse() or StringBuilder.reverse() in some programming languages
Answered by AI
Add your answer
Q2. Difference between arraylist and linkedlitst
Ans. 
ArrayList is a resizable array while LinkedList is a doubly linked list.
• ArrayList is faster for accessing elements while LinkedList is faster for adding or removing elements.

• ArrayList uses contiguous memory while LinkedList uses non-contiguous memory.

• ArrayList is better for random access while LinkedList is better for sequential access.

• Example: ArrayList - List names = new ArrayList<>(); LinkedList - List names = new L
Answered by AI
Add your answer

Round duration - 140 minutes
Round difficulty - Medium

Test timing was at 2:00 pm , it was conducted in a college and the environment was good for the test. Camera was a primary part of test, so no suspicious activity.

Q1. 
Sum of Two Numbers Represented as Arrays
Given two numbers in the form of two arrays where each element of the array represents a digit, calculate the sum of these two numbers and return this sum as an ar...read more
Ans. 
Given two numbers represented as arrays, calculate their sum and return the result as an array.
• Iterate through the arrays from right to left, adding digits and carrying over if necessary

• Handle cases where one array is longer than the other by considering the remaining digits

• Ensure the final sum array does not have any leading zeros
Answered by AI
Add your answer

Round duration - 20 minutes
Round difficulty - Easy

The round was conducted at around 12 p.m. I was called at the college location and then it was conducted. The interviewer was quite polite and frank.

Round duration - 8 minutes
Round difficulty - Easy

This round was conducted right after finishing and clearing the technical round at the same place and on the same day.