Qodenext Interview Questions, Process, and Tips

Basic coding interview.

Q1. What are SQL commands?
Ans. 
SQL commands are instructions used to interact with a database to perform tasks such as querying, updating, and deleting data.
• SQL commands are used to interact with databases to perform various tasks.

• Common SQL commands include SELECT, INSERT, UPDATE, DELETE, CREATE, and DROP.

• Examples: SELECT * FROM table_name; INSERT INTO table_name (column1, column2) VALUES (value1, value2); UPDATE table_name SET column1 = value WHER
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Q2. What are different types of datastructure explain Doubly linked list with code in any language
Ans. 
Doubly linked list is a data structure where each node contains a reference to the previous and next node.
• Doubly linked list allows traversal in both directions.

• Each node in a doubly linked list contains data and two pointers - one to the previous node and one to the next node.

• Example: Node A -> Node B -> Node C, where Node B has pointers to both A and C.
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Q3. What is the difference between the GROUP BY and ORDER BY clauses in SQL?
Ans. 
GROUP BY is used to group rows that have the same values, while ORDER BY is used to sort the result set.
• GROUP BY is used with aggregate functions like COUNT, SUM, AVG, etc.

• ORDER BY is used to sort the result set based on one or more columns.

• GROUP BY is used before the SELECT statement, while ORDER BY is used after the SELECT statement.
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Q4. What are the differences between HTML and HTML 5.0?
Ans. 
HTML 5.0 is the latest version of HTML with new features and improvements.
• HTML 5.0 supports new elements like <header>, <footer>, <nav>, <article>, <section> etc.

• HTML 5.0 introduces new APIs like canvas, audio, video, geolocation, local storage, etc.

• HTML 5.0 supports new form input types like email, url, date, range, color, etc.

• HTML 5.0 has improved semantics, accessibility, and multimedia
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Q5. Questions on web technology and backend technology invluding optimization questions
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Q1. Family members and salary discuss including ctc
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Q2. Hobbies and other personal growth related questions long term goals. Happiest memory in your life
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Q1. What is your role in company
Ans. My role in solve technical issues, project implementation,
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Q1. What is your rank
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