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Answering questions on Git, Mercurial, Linux/Windows services, Java thread dump, heap dump, and deadlock
Git and Mercurial are both version control systems, but Git is more popular and has a steeper learning curve
Merge conflicts occur when two or more people make changes to the same file at the same time, and can be resolved using tools like Git's merge tool or Mercurial's merge tool
Starting services in Linux can be don...
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I applied via Approached by Company and was interviewed in Apr 2024. There was 1 interview round.
A stack is a data structure that follows the Last In, First Out (LIFO) principle, where elements are added and removed from the top.
Elements are added to the top of the stack and removed from the top as well
Common operations on a stack include push (add element) and pop (remove element)
Examples of stacks include the call stack in programming and a stack of plates
VPC stands for Virtual Private Cloud, it is needed to securely isolate resources within the cloud environment.
VPC allows you to create a private network in the cloud.
It provides control over network settings such as IP address range, subnets, route tables, and network gateways.
VPC helps in securing resources by setting up security groups and network access control lists.
It enables you to connect your on-premises networ...
A load balancer is a device or software that distributes network or application traffic across multiple servers to ensure no single server is overwhelmed.
Balances traffic across multiple servers
Improves performance and reliability
Can be hardware or software based
Examples: F5 BIG-IP, NGINX, HAProxy
IAM stands for Identity and Access Management. Policies are rules that determine who has access to what resources.
IAM is a framework for managing digital identities and controlling access to resources
IAM policies are rules that define the permissions and access levels for different users or groups
IAM policies can be attached to users, groups, or resources to control access
IAM helps organizations ensure that only author...
DNS server is a system that translates domain names to IP addresses, allowing users to access websites using human-readable names.
DNS servers store a database of domain names and their corresponding IP addresses.
When a user enters a domain name in a web browser, the DNS server is queried to find the corresponding IP address.
DNS servers help in the efficient routing of internet traffic by translating domain names to IP ...
Types of lookup tables include direct mapping, associative arrays, and hash tables.
Direct mapping: uses a key to directly access the corresponding value in the table
Associative arrays: store key-value pairs where keys are unique
Hash tables: use a hash function to map keys to values for efficient retrieval
Troubleshooting steps for network issues
Check physical connections (cables, ports)
Verify network settings (IP address, subnet mask)
Restart networking devices (modem, router)
Run network diagnostics tools (ping, traceroute)
Check for software conflicts or firewall issues
posted on 23 May 2024
This was well organised.
Very well organised.
I applied via Company Website
posted on 6 Jan 2022
I applied via Walk-in and was interviewed in Jul 2021. There was 1 interview round.
I applied via Naukri.com and was interviewed in Sep 2020. There was 1 interview round.
No, two different users cannot have the same UID.
UID (User ID) is a unique identifier assigned to each user in a system.
Having two different users with the same UID can cause conflicts and security issues.
UIDs are typically assigned sequentially and are unique within a system.
For example, in Linux systems, UID 0 is reserved for the root user and cannot be assigned to any other user.
To create a new user without useradd or add user command, use the usermod command.
Use the usermod command with the -u option to create a new user
Specify the username and user ID as arguments
Example: usermod -u 1001 newuser
Create a home directory for the new user manually
Yes, group name can be changed. The procedure involves accessing the group settings and editing the name.
Access the group settings
Click on the group name
Edit the name
Save changes
The root user name can be changed by modifying the /etc/passwd file.
Open the /etc/passwd file in a text editor
Locate the line that starts with 'root'
Change the username in the first field to the desired name
Save and close the file
Restart the system or use the 'su' command to switch to the new username
I applied via Approached by Company and was interviewed in Apr 2024. There was 1 interview round.
A stack is a data structure that follows the Last In, First Out (LIFO) principle, where elements are added and removed from the top.
Elements are added to the top of the stack and removed from the top as well
Common operations on a stack include push (add element) and pop (remove element)
Examples of stacks include the call stack in programming and a stack of plates
VPC stands for Virtual Private Cloud, it is needed to securely isolate resources within the cloud environment.
VPC allows you to create a private network in the cloud.
It provides control over network settings such as IP address range, subnets, route tables, and network gateways.
VPC helps in securing resources by setting up security groups and network access control lists.
It enables you to connect your on-premises networ...
A load balancer is a device or software that distributes network or application traffic across multiple servers to ensure no single server is overwhelmed.
Balances traffic across multiple servers
Improves performance and reliability
Can be hardware or software based
Examples: F5 BIG-IP, NGINX, HAProxy
IAM stands for Identity and Access Management. Policies are rules that determine who has access to what resources.
IAM is a framework for managing digital identities and controlling access to resources
IAM policies are rules that define the permissions and access levels for different users or groups
IAM policies can be attached to users, groups, or resources to control access
IAM helps organizations ensure that only author...
DNS server is a system that translates domain names to IP addresses, allowing users to access websites using human-readable names.
DNS servers store a database of domain names and their corresponding IP addresses.
When a user enters a domain name in a web browser, the DNS server is queried to find the corresponding IP address.
DNS servers help in the efficient routing of internet traffic by translating domain names to IP ...
Types of lookup tables include direct mapping, associative arrays, and hash tables.
Direct mapping: uses a key to directly access the corresponding value in the table
Associative arrays: store key-value pairs where keys are unique
Hash tables: use a hash function to map keys to values for efficient retrieval
Troubleshooting steps for network issues
Check physical connections (cables, ports)
Verify network settings (IP address, subnet mask)
Restart networking devices (modem, router)
Run network diagnostics tools (ping, traceroute)
Check for software conflicts or firewall issues
posted on 25 May 2024
I applied via Approached by Company and was interviewed before May 2023. There were 3 interview rounds.
Vsphere is a virtualization technology used for managing virtual machines and resources in data centers.
Vsphere is a product by VMware that provides virtualization solutions for data centers.
It allows for the creation, management, and migration of virtual machines.
Vsphere includes features like vMotion for live migration of VMs, High Availability for automatic VM restarts, and Distributed Resource Scheduler for load ba...
I applied via Recruitment Consulltant and was interviewed before Sep 2022. There were 2 interview rounds.
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