Let's Mainframe! Important Interview questions for a Mainframe developer

As a college student I currently have 2 options. Whether to learn mainframe technologies as a part of the subject very wisely so I can apply in companies like BMC and IBM or shall I stick with DSA practicing. Enlighten me in areas of scope, advancement and salary.

After 2 years at Wipro in a support role, I've self-taught Java Spring Boot, Hibernate, and basic frontend skills, with good knowledge of DSA. However, I lack hands-on experience in real-time Java projects at my current company. What steps should I take to transition into a Java development role at another company?

I am planning to give interview for 3+ years experience. Please write interview question which you have asked in past.java +springboot etc

Hello all, I just wanted to ask you all what kind of questions you usually get in machine coding rounds? Like what things interviewers usually ask to code for example create a button, calculator etc. I was making some projects so, thought why not add the functionality which are usually asked in interviews. Can anyone please comment on the type of questions they faced? Thanks in advance 😃

Challenges faced while working on java projects 1. **Memory Leaks**: One challenge I faced was identifying and fixing memory leaks in a Java application. I used profilers like VisualVM or YourKit to analyze memory usage and identify objects that were not being garbage collected properly. Then, I reviewed the code to ensure proper resource management, such as closing streams and releasing references when they were no longer needed. 2. **Concurrency Issues**: In a multi-threaded Java application, I encountered race conditions and deadlocks. To solve these issues, I carefully reviewed the code to identify critical sections and synchronized access to shared resources using locks or concurrent data structures like ConcurrentHashMap. Additionally, I used tools like Java's built-in concurrency utilities and frameworks like Akka to manage concurrency more effectively. 3. **Performance Bottlenecks**: Optimizing the performance of a Java application was another challenge. I used profilers to identify bottlenecks and hotspots in the code. Then, I applied various optimization techniques such as algorithmic improvements, caching, and tuning JVM parameters like heap size and garbage collection settings to improve overall performance. 4. **Integration with Legacy Systems**: Integrating a Java application with legacy systems using outdated technologies and protocols was challenging. I leveraged libraries like Apache Camel or Spring Integration to abstract away the complexities of communication protocols and data formats. Additionally, I wrote custom adapters and converters to bridge the gap between the modern Java application and legacy systems. 5. **Handling Big Data**: Processing and analyzing large volumes of data efficiently posed a challenge. I used frameworks like Apache Spark or Hadoop to distribute data processing tasks across multiple nodes and scale horizontally. Additionally, I optimized data processing pipe Source: chatgpt

I am a mainframe developer with 10 years experience and have an offer from both TCS (25 lpa) and Capgemini (28 lpa). Which one could be a better choice overall, and not just monetary?

Short Pls help me prepare for any sort of questions that can be asked based on my projects only Long I was rejected in an on Campus interview because I didn't have any projects back then and now since I have those I really wanna dig deep on what extent the interview can go based on my projects only I don't have money right now Par jab bhi aap kahenge aapka kha kaam jarur karunga Pls help

Sometimes there are questions like design in memory key value store or a distributed message queue. Wanted to understand whats the evaluation criteria of companies asking these questions. And if any one of you have experience getting through this round, how did you approach?