Habasit India Applications Engineer Interview Questions and Answers

Q1. Data structures and Perl questions
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Q2. How can you search a file inside folder levels via command line
Ans. 
To search a file inside folder levels via command line, use the 'find' command.
• Open the command prompt or terminal

• Navigate to the folder where you want to start the search

• Use the 'find' command followed by the name of the file you want to search for

• Optionally, you can specify the depth of the search using the '-maxdepth' flag

• Example: 'find . -name myfile.txt -maxdepth 2'
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Q1. Total 3 round was there First 2 questions from the data structure and algorithm and third round was design
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Q2. Reverse the linked list
Ans. 
Reverse a linked list
• Create three pointers: current, prev, and next

• Iterate through the linked list, updating pointers accordingly

• Set the head of the linked list to the new tail
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Q3. Diameter of binary tree
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The diameter of a binary tree is the number of nodes on the longest path between two leaves in the tree.
• The diameter of a binary tree can be calculated by finding the height of the left subtree, the height of the right subtree, and adding them together.

• The diameter may or may not pass through the root of the tree.

• Example: For the binary tree below, the diameter is 4 (nodes 1, 2, 4, 7).

• 1

• / \

• 2 3

• / \
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Q1. Explain on AWS components
Ans. 
AWS components are services provided by Amazon Web Services for cloud computing.
• Compute services like EC2, Lambda

• Storage services like S3, EBS

• Database services like RDS, DynamoDB

• Networking services like VPC, Route 53

• Management tools like CloudWatch, CloudFormation
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Q2. How does Terraform work
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Terraform is an infrastructure as code tool that allows users to define and provision data center infrastructure using a declarative configuration language.
• Terraform uses a configuration file written in HashiCorp Configuration Language (HCL) to define the desired state of infrastructure.

• It then compares the desired state with the current state of the infrastructure and creates an execution plan to reach the desired sta...read more
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Dynamic Programming, Greedy Algorithm

Q1. Tell me about a time where you found a bug and how you resolved
Ans. 
Discovered a bug in the software during testing and resolved it by identifying the root cause and implementing a fix.
• During testing, found a bug where the application crashed when a specific input was entered.

• Investigated the issue by analyzing the code and logs to identify the root cause.

• Implemented a fix by updating the code to handle the input correctly and retested to ensure the bug was resolved.
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Q2. Trouble shooting steps if speakers of mobile are not working
Ans. 
Check volume settings, restart phone, check for software updates, test with headphones
• Check if volume is turned up on the phone

• Restart the phone to see if that resolves the issue

• Check for any software updates that may fix the problem

• Test the speakers with headphones to determine if the issue is with the speakers or the phone
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