HCL Group DevOps Lead Interview Questions and Answers for Experienced

Static class and static constructor in C#

• Static class can only contain static members and cannot be instantiated

• Static constructor is called only once when the class is first accessed

• Static constructor is used to initialize static members of the class

• Example: Math class in C# is a static class

• Example: static constructor can be used to initialize a static variable with a value

Performance improvement in Angular app

• Use lazy loading to load modules on demand

• Optimize change detection strategy

• Use trackBy function in ngFor loops

• Minimize DOM manipulation

• Use AOT compilation

• Implement server-side rendering

• Use web workers for heavy computations

• Use caching for frequently accessed data

Performing web application penetration testing on a website with firewall enabled.

• Identify the type of firewall and its configuration

• Perform reconnaissance to gather information about the target

• Identify vulnerabilities and exploit them

• Use tools like Burp Suite, Nmap, and Metasploit

• Test for common web application vulnerabilities like SQL injection and cross-site scripting

• Document findings and provide recommendations for

A flip-flop is a digital circuit that can store one bit of information. It has two stable states and is used for memory storage and data transfer.

• Flip-flops are made up of logic gates, such as NAND or NOR gates.

• They have two stable states: SET and RESET.

• The SET state is when the output is high and the RESET state is when the output is low.

• Flip-flops can be edge-triggered or level-triggered.

• Examples of flip-flops includ