Luxoft Interview Questions and Answers for Experienced

Find the maximum repeated number in a given string by counting occurrences of each digit and identifying the highest one.

• Iterate through the string: Loop through each character in the string to check if it's a digit.

• Count occurrences: Use a map or array to count how many times each digit appears.

• Identify the maximum: After counting, determine which digit has the highest count.

• Return the result: Output the digit th...read more

Indexing can improve query performance but has drawbacks like increased storage and maintenance overhead.

• Increased storage requirements: Indexes consume additional disk space. For example, a large table with multiple indexes can significantly increase storage needs.

• Slower write operations: Inserting, updating, or deleting records can be slower due to the need to update indexes. For instance, adding a new row requi...read more

Creating a simple Jenkins job with required parameters

• Log in to Jenkins and click on 'New Item'

• Enter a name for the job and select 'Freestyle project'

• Add build steps, post-build actions, and configure parameters as needed

• Save the job and run it to test

APM tools are software applications that help monitor and manage the performance of applications and infrastructure in real-time.

• APM stands for Application Performance Management or Monitoring.

• APM tools provide insights into the performance of applications, helping to identify and troubleshoot issues quickly.

• These tools monitor metrics such as response time, throughput, error rates, and resource usage.

• Examples of ...read more

I have extensive experience in designing scalable solutions across various industries, focusing on cloud architecture and integration.

• Led a team to migrate a legacy system to AWS, improving performance by 40%.

• Designed a microservices architecture for an e-commerce platform, enhancing scalability and maintainability.

• Implemented CI/CD pipelines using Jenkins and Docker, reducing deployment time by 70%.

• Collaborated w...read more

Cursors are database objects used to retrieve data from result sets one row at a time.

• Cursors are used in database management systems to navigate through a result set.

• They allow for processing individual rows of a result set instead of fetching the entire set at once.

• Cursors can be used in SQL queries to perform operations on each row of a result set.

Hash collusion is when two different inputs produce the same hash value.

• It is a security vulnerability in hash functions.

• Attackers can exploit this vulnerability to create a collision attack.

• For example, an attacker can create a malicious file with the same hash value as a legitimate file to bypass security checks.