RSA Interview Questions and Answers

Swap two numbers without using third variable

• Use arithmetic operators to swap values

• Addition and subtraction can be used to swap values

• XOR operator can also be used to swap values

Reverse a string without using array

• Use two pointers, one at the start and one at the end of the string

• Swap the characters at the two pointers and move the pointers towards each other

• Repeat until the pointers meet in the middle of the string

Find the largest palindrome substring in a given string.

• Iterate through the string and check for palindromes of odd and even lengths.

• Keep track of the largest palindrome found so far.

• Use dynamic programming to optimize the solution.

• Example: 'babad' -> 'bab' or 'aba'.

Sort numbers in string format using Python

• Convert the array of strings to an array of integers using map()

• Sort the array of integers using sorted()

• Convert the sorted array of integers back to an array of strings using map()

Execution of non-existent file

• An error message is displayed indicating the file does not exist

• The program may crash or terminate abruptly

• The operating system may throw an exception

• The program may prompt the user to create the file

To give group and user permissions in Linux, use the chmod command.

• Use the chmod command followed by the permission code (e.g. 755) and the file or directory name.

• To give permissions to a specific user, use the chown command followed by the username and file or directory name.

• To give permissions to a specific group, use the chgrp command followed by the group name and file or directory name.

Docker is a platform for developing, shipping, and running applications using containerization technology.

• Docker allows developers to package their applications and dependencies into a container that can run on any system

• Containers are lightweight and provide isolation, making it easy to deploy and scale applications

• Docker Hub is a repository of pre-built images that can be used to quickly deploy applications

• Docker Com...read more

Kubernetes is an open-source container orchestration platform that automates deployment, scaling, and management of containerized applications.

• Kubernetes is used to manage containerized applications across multiple hosts.

• It automates deployment, scaling, and management of containerized applications.

• It provides a platform for deploying, scaling, and managing containerized applications.

• Kubernetes is highly scalable and f...read more

Kubernetes was chosen due to its superior orchestration capabilities and larger community support.

• Kubernetes has better load balancing and scaling features

• Kubernetes has a larger community and more resources available

• Docker Swarm is simpler and easier to use for smaller projects

• Kubernetes is more suitable for complex, large-scale applications

Code is pushed to Github using Git commands through the terminal or a Git client.

• Create a new repository on Github

• Clone the repository to your local machine

• Make changes to the code and commit them using Git commands

• Push the changes to Github using Git commands

git clone copies a repository to local machine while git fork creates a copy on GitHub.

• git clone downloads the entire repository to local machine

• git fork creates a copy of the repository on GitHub

• git clone is used to work on an existing repository

• git fork is used to contribute to someone else's repository

• git clone creates a local copy of the repository

• git fork creates a remote copy of the repository

Maven is a build automation tool used primarily for Java projects.

• Maven manages dependencies and builds the project using a pom.xml file

• It simplifies the build process by providing a standard way of building and packaging projects

• Maven can also generate reports and documentation for the project

• Example: mvn clean install - compiles, tests, and packages the project

To change the owner of a file in Linux, use the chown command.

• Use the chown command followed by the new owner's username and the file name.

• To change the owner and group, use chown followed by the new owner's username, a colon, the new group's name, and the file name.

• To change the owner of a directory and its contents, use the -R option with chown.

• Example: chown newowner myfile.txt

• Example: chown newowner:newgroup myfile

A cron job can be run using the crontab command in Unix/Linux systems.

• Open the terminal and type 'crontab -e' to edit the cron table.

• Add a new line with the desired schedule and command to run.

• Save and exit the editor to activate the cron job.

• Use 'crontab -l' to list all current cron jobs.

• Use 'crontab -r' to remove all cron jobs.