Altimetrik Interview Questions, Process, and Tips for Experienced

Q1. How can you optmize dags?
Ans. 
Optimizing dags involves reducing unnecessary tasks, parallelizing tasks, and optimizing resource allocation.
• Identify and remove unnecessary tasks to streamline the workflow.

• Parallelize tasks to reduce overall execution time.

• Optimize resource allocation by scaling up or down based on task requirements.

• Use caching and memoization techniques to avoid redundant computations.

• Implement data partitioning and indexing for eff
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Q2. How can we handle unacknowledged messages in pubsub?
Ans. 
Unacknowledged messages in pubsub can be handled by implementing retries, dead letter queues, and monitoring mechanisms.
• Implement retries for unacknowledged messages to be redelivered.

• Use dead letter queues to store messages that repeatedly fail to be processed.

• Set up monitoring mechanisms to track unacknowledged messages and identify potential issues.
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Q1. Questions based on java collections
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Q1. Big data technologies
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Q2. What is hadoop in big data
Ans. 
Hadoop is an open-source framework used for distributed storage and processing of large data sets across clusters of computers.
• Hadoop consists of HDFS (Hadoop Distributed File System) for storage and MapReduce for processing.

• It allows for parallel processing of large datasets across multiple nodes in a cluster.

• Hadoop is scalable, fault-tolerant, and cost-effective for handling big data.

• Popular tools like Apache Hive, A...read more
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Q1. What are the traversal conditions for a Doubly Linked List? And write a program to traverse.This was the first question and I had no answer and ended up the interview immediately by asking any questions fo...read more
Ans. 
Traversal conditions for a Doubly Linked List involve moving forward and backward through each node.
• Start at the head node and move to the next node by following the 'next' pointer.

• To traverse backward, start at the tail node and move to the previous node by following the 'prev' pointer.

• Continue this process until reaching the end of the list.
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Technical Assessment Test (MCQs) - 30 mins.

Q1. Basic Questions on: 1.Python 2.SQL 3.Spark
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Q2. Python: Replace all occurrences of word: "apple" with "froot" and count no.of occurrences of word: "apple" - in a given string (multiple lines) SQL: 1. Retrieve employee details, drawing the maximum salar...read more
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Q3. Convert string (multiple lines) to list
Ans. 
Use the split() method to convert a string with multiple lines into a list of strings.
• Use the split() method with the newline character '\n' as the delimiter to split the string into a list of strings.

• Example: 'Hello\nWorld\n' -> ['Hello', 'World']
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Q4. Convert string of multiple lines with 'n' words to multiple arrays of fixed size: k, with no overlap of elements accross arrays.
Ans. 
Convert a string of multiple lines with 'n' words to multiple arrays of fixed size without overlap.
• Split the string into individual words

• Create arrays of fixed size 'k' and distribute words evenly

• Handle cases where the number of words is not divisible by 'k'
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Print the unique elements in the unsorted array without sorting it, achieving a time complexity of O(n).

Q1. OOPS questions, SOLID principles, Functional interface, difference between thread wait and join
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