Colan Infotech Software Engineer Interview Questions and Answers

Coding Rount
DSA Round + Puzzle
SQL + Project Discussion
JS

Dsa problems dp and tress problem

Q1. Tell me about your self
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Q2. Projects and intership
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Q1. Given an array Reverse array
Ans. 
Reverse array of strings
• Iterate through the array and swap elements from start to end

• Use two pointers, one at the beginning and one at the end, and swap elements until they meet
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Q2. Giaven a string Reverse string
Ans. 
Reverse a given string
• Use built-in functions like reverse() or loop through the string in reverse order

• Create a new string and append characters from the original string in reverse order

• Convert the string to an array of characters, reverse the array, and then join it back into a string
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Q3. Given array find sum of all elements
Ans. 
Calculate sum of all elements in a given array of strings
• Iterate through the array and convert each element to integer before adding to sum

• Handle edge cases like empty array or non-numeric elements

• Return the final sum after iterating through all elements
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Q1. Phone screen about previous experience
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Q1. Mobile app development basics
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Q1. Culture fit questions
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Q1. What is docker cp command
Ans. 
Docker cp command is used to copy files/folders between a container and the host machine.
• Used to copy files/folders from a container to the host machine or vice versa

• Syntax: docker cp [OPTIONS] CONTAINER:SRC_PATH DEST_PATH

• Example: docker cp mycontainer:/app/file.txt /host/path
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Q2. How ingress works and how network policy can be created for this situation
Ans. 
Ingress is a Kubernetes resource that exposes HTTP and HTTPS routes from outside the cluster to services within the cluster.
• Ingress works by defining rules for routing external traffic to services based on hostnames or paths.

• Network policies can be created to control the traffic allowed to reach the services behind the Ingress.

• For example, a network policy can restrict traffic to a specific service to only come from a
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Question based on array string linkedlist

It was online test having coding questions for logical part and UI part

Q1. Again logical and technical round with questions that you need to code while sharing your screen.
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Q2. Todo list problem
Ans. 
Implement a todo list with add, delete, and mark as completed functionalities.
• Create an array to store the tasks

• Implement functions to add, delete, and mark tasks as completed

• Display the tasks with their completion status
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Q1. Basic js concepts
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