CEI Software Developer Interview Questions and Answers

Basic coding excercise , linux platform.file handling

Q1. Simpe question , family baground,
Add your answer
Q2. Strength , weakness,
Add your answer

Q1. Regrading Self join query
Ans. 
A self join query is used to join a table to itself in a SQL query.
• Self join is used when a table needs to be joined with itself to compare rows within the same table.

• It requires aliasing the table with different names to distinguish between the two instances of the same table.

• Commonly used in hierarchical data structures or when comparing related rows in a table.
Answered by AI
Add your answer
Q2. Group by query per catagory
Ans. 
Group by query is used to group data based on a specific category.
• Use the GROUP BY clause in SQL to group data based on a specific column

• Aggregate functions like COUNT, SUM, AVG can be used with GROUP BY to perform calculations on grouped data

• Example: SELECT category, COUNT(*) FROM products GROUP BY category
Answered by AI
Add your answer

Q1. Why public static use
Ans. 
public static use for accessing methods and variables without creating an object
• Allows access to methods and variables without creating an object

• Useful for utility classes where objects are not needed

• Can be used to create global variables or constants

• Example: Math class in Java has only static methods and constants
Answered by AI
Add your answer
Q2. Why static is use.Pattern question,hshshdhdhxhxhxhxhdhhxjdjdjdjdjnjsjs
Add your answer

Q1. To write any code in any programming language
Ans. 
This code demonstrates a simple Python function to calculate the factorial of a number using recursion.
• Define a function named 'factorial' that takes one argument 'n'.

• Check if 'n' is less than or equal to 1; if so, return 1.

• Otherwise, return 'n' multiplied by 'factorial(n-1)'.

• Example: factorial(5) returns 120.
Answered by AI
Add your answer
Q2. About the project work that i have done
Add your answer

Q1. Time was 3:15 in the clock write an code to find the angle between the hour and minute hand
Ans. 
Calculate the angle between the hour and minute hands of a clock at 3:15.
• Each hour on the clock represents 30 degrees (360 degrees / 12 hours).

• Each minute represents 6 degrees (360 degrees / 60 minutes).

• At 3:15, the hour hand is at 97.5 degrees (3 hours * 30 + 15 minutes * 0.5).

• The minute hand is at 90 degrees (15 minutes * 6).

• The angle between the hands is the absolute difference: |97.5 - 90| = 7.5 degrees.
Answered by AI
Add your answer
Q2. About the project work
Add your answer

Q1. Implement a linked list
Ans. 
A linked list is a data structure that consists of a sequence of nodes, each containing a reference to the next node.
• Each node has a data field and a next field that points to the next node

• Insertion and deletion can be done efficiently

• Traversal starts from the head node and continues until the end node is reached
Answered by AI
Add your answer
Q2. Questions on JAVA
Add your answer

It placed in hackerRank.question difficulty level was medium.

Q1. The difficulty depends upon who is taking your interview. But mostly asked questions were related to string and hashmap.
Add your answer

Q1. It was more like a little bit technical and hr round. Mostly talk about personal profile like education,family background, hobbies and etc.
Add your answer

Medium level leetcode

Q1. Basics of linked list. How to delete without head and address of current node is given?
Add your answer
Q2. Simple join queries on 2 to 3 tables?
Ans. 
Join queries are used to combine data from multiple tables based on a related column between them.
• Use JOIN keyword to combine tables based on a common column

• Specify the columns to select from each table

• Use WHERE clause to specify the join condition
Answered by AI
Add your answer

It was a MCQ + Coding test

Q1. Questions on DSA
Add your answer
Q2. Questions on CS Fundamentals
Add your answer

Q1. Questions on Linux commands
Add your answer
Q2. Questions related to oops and CS is
Add your answer