HCLTech System Engineer Interview Questions and Answers

Swap two numbers with and without temporary variable

• Without temporary variable: Use addition and subtraction

• With temporary variable: Use a third variable to store the value of one of the numbers

• Example without temporary variable: a=5, b=7; a=a+b; b=a-b; a=a-b;

• Example with temporary variable: a=5, b=7; temp=a; a=b; b=temp;

To troubleshoot performance related errors, analyze system logs, check resource utilization, identify bottlenecks, and optimize configurations.

• Analyze system logs for any error messages or warnings related to performance issues

• Check resource utilization such as CPU, memory, disk, and network usage

• Identify bottlenecks in the system that may be causing performance degradation

• Optimize configurations such as adjusting settings, upgrading hardware, or tuning software parameters

Troubleshooting DB errors involves identifying the root cause, checking logs, verifying configurations, and testing queries.

• Identify the specific error message or behavior

• Check database logs for any relevant information

• Verify database configurations and settings

• Test the problematic queries to isolate the issue

• Consider recent changes or updates that may have caused the error

P1 tickets are high priority issues that require immediate attention and resolution.

• Acknowledge the ticket immediately to show the user that their issue is being addressed

• Assess the severity of the issue and prioritize accordingly

• Communicate with the user regularly to provide updates on the progress

• Involve necessary stakeholders or teams to expedite resolution

• Ensure proper documentation of the issue and resolution steps taken

The recent challenges faced in the field of System Engineering include adapting to remote work, cybersecurity threats, and managing complex systems.

• Adapting to remote work due to the COVID-19 pandemic

• Increased cybersecurity threats and the need for enhanced security measures

• Managing complex systems with evolving technology and integration challenges

Mainframe is a large, powerful, and centralized computer system used for critical applications in industries like banking and healthcare.

• Mainframes are known for their reliability, security, and high processing power.

• They are often used by large organizations for tasks like processing transactions, managing databases, and running complex applications.

• Examples of mainframe systems include IBM zSeries and Unisys ClearPath.