QLIKMATRIX SEM AND ANALYTICS Interview Questions and Answers

Implement various operations on a linked list and solve related problems like reversing a linked list or detecting a cycle.

• Understand the basic structure of a linked list with nodes containing data and a reference to the next node.

• For insertion, update the pointers of the nodes accordingly to maintain the sequence.

• For deletion, adjust the pointers to skip the node to be deleted.

• To reverse a linked list, iterate through...read more

Approach debugging by understanding the code flow, using debugging tools, isolating the issue, and testing solutions.

• Start by understanding the code flow and identifying potential areas where the issue may be occurring.

• Use debugging tools like breakpoints, logging, and stack traces to pinpoint the source of the problem.

• Isolate the issue by reproducing it consistently and narrowing down the scope of the problem.

• Test pot...read more

Refactored a legacy codebase to improve performance by optimizing database queries.

• Identified bottlenecks in the codebase by profiling and analyzing performance metrics.

• Rewrote complex and inefficient database queries to improve response times.

• Implemented caching mechanisms to reduce redundant database calls.

• Refactored code to follow best practices and improve maintainability.

• Tested the changes thoroughly to ensure the

By prioritizing tasks, using efficient algorithms, and conducting code reviews.

• Prioritize tasks based on impact and complexity to focus on critical components first.

• Utilize efficient algorithms and data structures to optimize code performance.

• Conduct code reviews with team members to identify potential bottlenecks and suggest improvements.

• Example: Prioritize implementing a caching mechanism for frequently accessed data

I would approach the situation by respectfully discussing the pros and cons of both solutions and finding a compromise.

• Listen to the senior team member or client's perspective and understand their reasoning

• Present your preferred solution along with the reasons why you believe it is the best approach

• Engage in a constructive discussion to find common ground or a compromise

• Consider the impact of each solution on the proje...read more

I regularly attend tech conferences, read industry blogs, participate in online courses, and collaborate with colleagues to stay updated.

• Attend tech conferences to learn about new technologies and trends

• Read industry blogs and articles to stay informed

• Participate in online courses and tutorials to expand knowledge

• Collaborate with colleagues to share insights and learn from each other

I use package managers, regularly update dependencies, and conduct security audits.

• Utilize package managers like npm, pip, or Maven to manage dependencies

• Regularly update dependencies to ensure compatibility and security patches

• Conduct security audits using tools like OWASP Dependency-Check or Snyk

• Consider using dependency locking to ensure consistent builds

I implemented a new feature using React Native and had to learn the framework on the job.

• Researched online resources and documentation to understand React Native

• Experimented with small projects to practice using React Native

• Sought help from colleagues or online communities when facing challenges

Identified and addressed a potential bottleneck in a system before it became a problem.

• Monitored system performance regularly to identify any potential bottlenecks

• Analyzed system logs and metrics to pinpoint the root cause of the bottleneck

• Implemented optimizations such as caching, indexing, or code refactoring to address the bottleneck

• Collaborated with team members to implement a long-term solution to prevent similar

I prioritize tasks based on deadlines, impact, and dependencies, and use tools like to-do lists and project management software.

• Evaluate deadlines and prioritize tasks that are due soon

• Consider the impact of each task on the overall project or team goals

• Identify dependencies between tasks and prioritize accordingly

• Use tools like to-do lists, project management software, or time-blocking techniques to stay organized

• Regu

I use consistent naming conventions, inline comments, and thorough documentation to ensure clean and well-documented code.

• Follow consistent naming conventions for variables, functions, and classes to make the code easier to understand.

• Include inline comments to explain complex logic or algorithms within the code.

• Write thorough documentation for each function, class, and module to provide context and usage instructions ...read more

Approach integrating new feature into existing system without disruption

• Analyze the existing system to understand its architecture and dependencies

• Identify the impact of the new feature on the current functionality

• Implement the new feature in a separate branch or environment for testing

• Conduct thorough testing to ensure the new feature works as expected and does not break existing functionality

• Gradually integrate the n...read more