Veer & Co Interview Questions, Process, and Tips

Pretty simple SQL, apptitude and programming questions for a duration of 1 hour.

Easy Going GD 5 people in a group with a given topic, we were supposed to say against and for the motion.

Q1. What are procedures?
Ans. 
Procedures are a set of steps or actions that need to be followed in a specific order to achieve a desired outcome.
• Procedures provide a structured approach to completing tasks.

• They help ensure consistency and accuracy in performing tasks.

• Procedures can be documented in manuals, guides, or standard operating procedures.

• Examples include software testing procedures, medical procedures, and manufacturing procedures.
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Q2. Difference between SQL and MongoDB?
Ans. 
SQL is a relational database management system, while MongoDB is a NoSQL database management system.
• SQL is a relational database, MongoDB is a document-oriented database

• SQL uses tables and rows, MongoDB uses collections and documents

• SQL uses structured query language, MongoDB uses JSON-like documents with dynamic schemas
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Q3. What are abstract classes?
Ans. 
Abstract classes are classes that cannot be instantiated and may contain abstract methods that must be implemented by subclasses.
• Cannot be instantiated directly

• May contain abstract methods

• Used as a blueprint for other classes
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Q4. Write a program to find duplicate elements in an array
Ans. 
Program to find duplicate elements in an array of strings
• Create a HashSet to store unique elements

• Iterate through the array and check if element is already in the HashSet

• If element is already in the HashSet, it is a duplicate
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Q5. Explain promises in javascript?
Ans. 
Promises in JavaScript are objects representing the eventual completion or failure of an asynchronous operation.
• Promises are used to handle asynchronous operations in JavaScript.

• They can be in one of three states: pending, fulfilled, or rejected.

• Promises can be chained using .then() to handle success and .catch() to handle errors.

• Example: const myPromise = new Promise((resolve, reject) => { ... });
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