200+ Interview Questions and Answers

Docker save and Docker load commands can be used to transfer an image from one machine to another without using a Docker registry.

• Use the 'docker save' command to save the image as a tar file on the source machine

• Transfer the tar file to the destination machine using any file transfer method (e.g., scp)

• On the destination machine, use the 'docker load' command to load the image from the tar file

Distributed Jenkins nodes are used to handle large-scale builds and improve performance.

• Large-scale builds: When there are a large number of builds to be executed simultaneously, distributed Jenkins nodes can handle the load by distributing the builds across multiple nodes.

• Improved performance: By distributing the workload, the overall build time can be reduced, resulting in improved performance.

• Resource utilization: Distributed nodes allow for better utilization of resources...read more

Akamai request flow involves parsing rules in a hierarchical manner.

• Akamai request flow involves multiple stages and rules.

• When a request comes to Akamai, it goes through a series of stages such as Edge server selection, caching, and delivery.

• During each stage, different rules are parsed and applied based on the configuration.

• The hierarchy of rules determines the order in which they are evaluated and applied.

• For example, caching rules may be evaluated before delivery rules.

• Th...read more

To debug a progressively slowing down website, I would analyze the server logs, check for memory leaks, and optimize the code.

• Analyze server logs to identify any errors or bottlenecks

• Check for memory leaks in the code

• Optimize the code by removing unnecessary scripts and optimizing images

• Use tools like Chrome DevTools to identify performance issues

• Consider implementing a content delivery network (CDN) to improve website speed

Load balancer routes traffic to other healthy instances

• Load balancer detects the unhealthy instance

• Stops sending traffic to that instance

• Routes traffic to other healthy instances

• Maintains high availability and scalability of the application

To configure the new LUN in VC, I will follow the given steps and set the block size based on the volume size.

• Add the new LUN to the storage array

• Rescan the storage adapters in vSphere Client

• Create a new datastore using the new LUN ID

• Set the block size based on the volume size (e.g. 1MB for 500GB volume size)

The basic commands to troubleshoot connectivity between vSphere Client/vCenter and ESX server.

• Ping the ESX server from the vSphere Client/vCenter to check network connectivity.

• Check if the ESX server is reachable by using the vmkping command.

• Verify if the ESX server's management services are running using the service mgmt-vmware status command.

• Check the firewall settings on the ESX server to ensure necessary ports are open.

• Restart the management agents on the ESX server using...read more

To create a binary search tree of minimum height from a sorted skewed binary tree, we can use the following approach:

• Find the middle element of the sorted skewed binary tree.

• Make it the root of the new binary search tree.

• Recursively repeat the process for the left and right halves of the original tree.

• Attach the resulting subtrees as the left and right children of the root.

The command to restart SSH, NTP, and VMware Web access is service.

• To restart SSH, use the command: service ssh restart

• To restart NTP, use the command: service ntp restart

• To restart VMware Web access, use the command: service vmware-webaccess restart

Inodes are data structures that store information about files on a Unix/Linux file system. File descriptors are unique identifiers for open files. Swap is a space on a hard disk used as virtual memory.

• Inodes contain metadata about files such as ownership, permissions, and timestamps.

• File descriptors are used by the operating system to keep track of open files and to perform I/O operations on them.

• Swap is used when the amount of physical memory (RAM) is insufficient to hold al...read more

Yes, AWS provides various methods to blacklist IPs.

• Use AWS WAF to create rules to block specific IP addresses

• Configure security groups to deny traffic from specific IP addresses

• Utilize AWS Network ACLs to block traffic from specific IP addresses

The default number of ports configured with the Virtual Switch is 8.

• The Virtual Switch is a software-based network switch that allows virtual machines to communicate with each other and with the host system.

• By default, the Virtual Switch is configured with 8 ports, which can be used to connect virtual machines and other network devices.

• These ports can be assigned to different virtual machines or network adapters as needed.

• Additional ports can be added or existing ports can be...read more

The relevant elements to consider in ascertaining the cost of creating a quote by an IT company

• Scope of the project

• Complexity of the requirements

• Labor costs

• Technology and tools required

• Timeframe for completion

• Overhead expenses

• Profit margin

• Competitor pricing

• Client's budget constraints

Executor framework is used to manage threads and execute tasks asynchronously.

• Executor framework provides a way to manage threads and execute tasks asynchronously.

• It provides a thread pool and a queue to manage tasks.

• It helps in improving the performance of the application by reducing the overhead of creating and destroying threads.

• It also provides a way to handle exceptions and errors in the tasks.

• Example: Executors.newFixedThreadPool(10) creates a thread pool of 10 threads.

To reset the root password of the Service Console, you can follow these steps:

• Restart the system and press 'e' at the GRUB menu to edit the boot configuration

• Locate the line starting with 'linux' and append 'init=/bin/bash' at the end

• Press 'Ctrl + X' to boot into single-user mode

• Remount the root file system as read-write by running 'mount -o remount,rw /'

• Reset the root password by running 'passwd root'

• Reboot the system and login with the new root password

ISOs are important because they provide a set of standards and guidelines for various industries.

• ISOs ensure consistency and quality in products and services.

• ISOs help organizations meet legal and regulatory requirements.

• ISOs promote international trade by harmonizing standards across countries.

• ISOs enhance customer confidence and trust in products and services.

• ISOs facilitate interoperability and compatibility between different systems.

• ISOs cover a wide range of areas such a...read more