Vervali Systems Mern Stack Developer Interview Questions and Answers

While loop is used when the number of iterations is not known beforehand, while for loop is used when the number of iterations is known.

• While loop checks a condition before each iteration, for loop has initialization, condition, and increment/decrement expressions.

• For loop is more concise and easier to read for iterating over a range of values.

• While loop is more flexible and can be used for situations where the number ...read more

NoSQL databases are non-relational databases that do not require a fixed schema, while SQL databases are relational databases that use structured query language.

• NoSQL databases are schema-less, allowing for flexibility in data storage

• SQL databases use structured query language to interact with data

• NoSQL databases are horizontally scalable, making them suitable for big data applications

• SQL databases are vertically scala...read more