Junior Developer Interview Questions and Answers for Freshers

The question covers various topics related to database management, SQL, and object-oriented programming concepts.

• Truncate is a DDL command used to delete all records from a table, while delete is a DML command used to remove specific records.

• Primary key uniquely identifies each record in a table, while a unique key ensures that all values in a column are unique.

• Composite key is a combination of multiple columns that uniquely identify a record in a table.

• Foreign key establishe...read more

To determine if a number is even or odd, check the remainder when divided by 2.

• Use the modulus operator (%) to find the remainder.

• If number % 2 == 0, the number is even.

• If number % 2 != 0, the number is odd.

• Example: 4 % 2 == 0 (even), 5 % 2 != 0 (odd).

I have 2 years of experience in web development, working with HTML, CSS, JavaScript, and various frameworks.

• 2 years of experience in web development

• Proficient in HTML, CSS, and JavaScript

• Familiar with various frameworks like React and Angular

• Developed responsive and interactive websites

I have a background in computer science with experience in various programming languages including Python, Java, and JavaScript.

• Completed a Bachelor's degree in Computer Science, where I learned foundational programming concepts.

• Worked on a project using Python to develop a web scraper that collects data from multiple websites.

• Gained experience in Java through building a simple Android application for tracking personal expenses.

• Utilized JavaScript and React to create a respon...read more

I systematically identify and resolve issues in code through a structured debugging process.

• Reproduce the issue: Ensure the bug can be consistently replicated.

• Check error messages: Analyze any error messages or logs for clues.

• Use debugging tools: Utilize tools like breakpoints and step-through debugging to inspect code execution.

• Isolate the problem: Narrow down the code to the smallest section that causes the issue.

• Review recent changes: Look at recent code changes that might...read more

Identifying prime numbers involves checking if a number has only two distinct positive divisors: 1 and itself.

• A prime number is greater than 1 and has no divisors other than 1 and itself.

• To check if a number n is prime, test divisibility from 2 to √n.

• For example, 7 is prime (divisors: 1, 7), while 8 is not (divisors: 1, 2, 4, 8).

• Special cases: 2 is the only even prime number; all other even numbers are not prime.

Footer in HTML is used to display information at the bottom of a webpage. Anchor tag is used to create hyperlinks. CSS syntax includes selectors, properties, and values.

• Footer in HTML is created using the <footer> tag.

• Anchor tag <a> is used to create hyperlinks in HTML.

• CSS syntax includes selectors (e.g. class, id), properties (e.g. color, font-size), and values (e.g. red, 16px).

Joins in SQL combine rows from two or more tables based on related columns, with left, right, and inner joins serving different purposes.

• Left Join: Returns all records from the left table and matched records from the right table. Example: SELECT * FROM A LEFT JOIN B ON A.id = B.a_id;

• Right Join: Returns all records from the right table and matched records from the left table. Example: SELECT * FROM A RIGHT JOIN B ON A.id = B.a_id;

• Inner Join: Returns only the records that have ...read more