IT Developer

IT Developer Interview Questions and Answers

Updated 7 Jul 2025

Q. What are static IP and dynamic IP addresses?

Ans.

Static IP is a fixed IP address assigned to a device, while dynamic IP is one that changes each time a device connects to a network.

  • Static IP remains the same every time the device connects to the network

  • Dynamic IP changes each time the device connects to the network

  • Static IP is typically used for servers, while dynamic IP is common for personal devices

  • Example: A home router may have a dynamic IP assigned by the ISP, while a web server may have a static IP for consistent acce...read more

Q. What is the difference between DELETE and DROP commands in SQL?

Ans.

Delete command removes rows from a table, while drop command removes entire table structure.

  • DELETE command is used to remove specific rows from a table based on a condition

  • DROP command is used to remove an entire table along with its structure

  • DELETE command can be rolled back using transactions, while DROP command cannot be rolled back

  • Example: DELETE FROM table_name WHERE condition; DROP TABLE table_name;

Q. What is REST API?

Ans.

REST API is a set of rules and conventions for building and interacting with web services using HTTP methods.

  • REST stands for Representational State Transfer

  • Uses standard HTTP methods like GET, POST, PUT, DELETE

  • Data is transferred in JSON or XML format

  • Stateless communication between client and server

  • Example: GET request to retrieve data from a server

Asked in Cohesity

2d ago

Q. What is copy maps?

Ans.

Copy maps are data structures used to create a shallow copy of an existing map.

  • Copy maps are commonly used in programming languages like JavaScript and Go.

  • They allow you to duplicate the key-value pairs of a map into a new map.

  • The new map shares the same references to the values as the original map.

  • If any of the values in the original map are modified, the corresponding values in the copy map will also be modified.

  • Copy maps are useful when you want to create a new map with th...read more

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