Crio.Do Junior Java Developer Interview Questions and Answers

Q1. About Myself in details
Add your answer
Q2. Past internships and work experiences
Add your answer

Q1. Primary keys, Unique key
Add your answer
Q2. Usage advantages and disadvantages of Indexing
Add your answer

SQL- 1 departments with no users
2 dept_id and their respective no. of users

DSA1: Most frequent no. in an array
DSA2: Zero Sum subarray exists

Question were very basic from array and stacks

Q1. Related to skills that you have mentioned in your resume.
Add your answer

It's Amcat test having 4 parts which is grammar, logical reasoning, basic mathematics and coding.

Q1. Another on screening nterview .
Add your answer

Q1. What is indexing in dbms and oops qrelated questions
Add your answer
Q2. Indexing is way to optimize data retrival process
Add your answer

3 coding question around prime number arrays and strings

Q1. Introduce youself
Add your answer
Q2. Question around project and skill in the resume and one coding question to solve
Add your answer

Q1. Question on project and skill in resume
Add your answer
Q2. 2 question arouond data structer and algorithm
Add your answer

Q1. Find duplicates in an array
Ans. 
Use a hash set to find duplicates in an array of strings.
• Create a hash set to store unique elements.

• Iterate through the array and check if the element is already in the hash set.

• If it is, then it is a duplicate. If not, add it to the hash set.
Answered by AI
Add your answer
Q2. Find single duplicate element in an array where contents of the array are length of array - 1
Ans. 
Find the single duplicate element in an array of strings with length n-1.
• Iterate through the array and use a HashSet to keep track of elements seen so far.

• If an element is already in the HashSet, that is the duplicate element.

• Return the duplicate element once found.
Answered by AI
Add your answer

Create a student support system

Q1. Design an order and payments system for an EdTech company
Ans. 
Design an order and payments system for an EdTech company
• Allow users to browse and select courses

• Implement a shopping cart for users to add courses

• Integrate payment gateways for secure transactions

• Provide order confirmation and receipt to users

• Allow users to track their order status
Answered by AI
Add your answer

Coding test of your skills and how well can you cope up with a problem given.

Q1. LAC of 3 nodes
Ans. 
LAC stands for Location Area Code, a unique identifier for a group of cells in a mobile network.
• LAC helps in identifying the location of a mobile device within a cellular network.

• It is used for handover procedures when a device moves between different cells.

• In a network with 3 nodes, each node would have a unique LAC assigned to it.
Answered by AI
Add your answer
Q2. Reverse of the array
Ans. 
Reverse the order of strings in an array
• Use the reverse() method to reverse the array

• Example: ['apple', 'banana', 'cherry'] -> ['cherry', 'banana', 'apple']
Answered by AI
Add your answer
Q3. Sum or product asked
Add your answer

Q1. What is java? what is database? what is springboot? what is package?
Ans. 
Java is a popular programming language used for developing various applications. Database is a structured collection of data. Spring Boot is a framework for building Java-based applications. Package is a way to organize classes and interfaces in Java.
• Java is a high-level, object-oriented programming language known for its portability and versatility.

• Database is a structured collection of data organized for easy access,...read more
Answered by AI
Add your answer