NJ Technologies Backend Developer Interview Questions and Answers

Q1. What you do? Description with analysis
Ans. 
I am a Java Developer responsible for designing, developing, and maintaining Java applications.
• Design and develop Java applications

• Write clean, efficient, and maintainable code

• Collaborate with team members to troubleshoot and solve technical issues
Answered by AI
Add your answer

Q1. Java,sql,python
Add your answer

Q1. What is your goal
Add your answer

Code was of leetcode medium level.

Q1. Easy level DS code
Add your answer
Q2. Question related to database
Add your answer

Q1. Questions related to SQL
Add your answer
Q2. Inner join of three tables
Ans. 
Inner join of three tables in SQL
• Use the JOIN keyword to combine three tables based on a common column

• Specify the columns to select from each table

• Use the ON keyword to specify the join condition
Answered by AI
Add your answer
Q3. What is cross join
Ans. 
Cross join is a type of join operation in SQL that returns the Cartesian product of two tables.
• Cross join does not require any matching condition between the tables.

• It combines each row from the first table with every row from the second table.

• Cross join can result in a large number of rows if the tables are big.

• Example: SELECT * FROM table1 CROSS JOIN table2;
Answered by AI
Add your answer

Q1. Share your past work experience.
Add your answer

Q1. What is research?
Ans. 
Research is the systematic investigation of a subject to discover new knowledge or validate existing theories.
• Research involves a systematic and organized approach to gather information and analyze data.

• It aims to answer specific questions or solve problems by using various methods and techniques.

• Research can be conducted in various fields such as science, social sciences, business, and technology.

• Examples of research ...read more
Answered by AI
Add your answer

Q1. What is secondary research
Ans. 
Secondary research involves gathering information from existing sources such as books, articles, and reports.
• Secondary research is the process of collecting and analyzing data that has already been published or gathered by others.

• It is used to gain a better understanding of a topic, validate primary research findings, or gather historical data.

• Examples of secondary research sources include academic journals, government
Answered by AI
Add your answer
Q2. What have u done in your internship
Ans. 
I worked on data analysis projects, conducted market research, and created reports for senior management.
• Conducted data analysis on customer feedback surveys

• Assisted in creating financial models to analyze company performance

• Researched market trends and competitor analysis

• Prepared presentations and reports for senior management meetings
Answered by AI
Add your answer
Q3. PEP relevant questions
Add your answer