Intersoft Data Labs Test Engineer Interview Questions and Answers

Round duration - 40 minutes
Round difficulty - Medium

Asked about time complexity of algorithm, puzzles, DBMS, cutting edge technologies etc. What are indexes?

Q1. 
Flip Bits Problem Explanation
Given an array of integers ARR of size N, consisting of 0s and 1s, you need to select a sub-array and flip its bits. Your task is to return the maximum count of 1s that can b...read more
Ans. 
Given an array of 0s and 1s, find the maximum count of 1s by flipping a sub-array at most once.
• Iterate through the array and keep track of the maximum count of 1s obtained by flipping a sub-array.

• Consider flipping a sub-array from index i to j and calculate the count of 1s in the resulting array.

• Return the maximum count of 1s obtained by flipping a sub-array at most once.
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Round duration - 20 minutes
Round difficulty - Medium

Asked 1 standard algorithm

Q1. 
Number of Islands Problem Statement
You are provided with a 2-dimensional matrix having N rows and M columns, containing only 1s (land) and 0s (water). Your goal is to determine the number of islands in t...read more
Ans. 
Count the number of islands in a 2D matrix of 1s and 0s.
• Iterate through the matrix and perform depth-first search (DFS) to find connected 1s.

• Mark visited cells to avoid redundant traversal.

• Increment island count whenever a new island is encountered.
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Leet code medium level question

Q1. About Java Streams
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Q2. Restful API coding completion based on given file
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Q1. To check your attitude
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Q2. Given detailed about company and what project you are going to work on?
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Q1. Hashmap working
Ans. 
Hashmap is a data structure that stores key-value pairs and allows for fast retrieval of values based on keys.
• Hashmap uses a hashing function to map keys to indices in an array.

• It allows for constant time complexity O(1) for insertion, deletion, and retrieval operations.

• Example: HashMap<String, Integer> map = new HashMap<>(); map.put("key", 123); int value = map.get("key");
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Q2. Multithreading cases
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Q3. Scenario specific on how to handle multiple events on a single variable to have accurate result
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Q4. Database indexing
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Q5. Architecture level
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Q1. What is VPN virtual private network?
Ans. 
VPN is a secure connection between two or more devices over the internet.
• VPN encrypts data to ensure privacy and security

• It allows remote access to a private network

• It can be used to bypass geo-restrictions and access blocked content

• Examples include OpenVPN, Cisco AnyConnect, and NordVPN
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Q2. Specifications about ping cmd
Ans. 
Ping cmd is a network diagnostic tool used to test connectivity between two devices.
• Ping sends ICMP packets to the destination device and measures the response time.

• It can be used to test network latency, packet loss, and network congestion.

• Ping can also be used to determine the IP address of a device.

• Ping can be run from the command prompt on Windows, macOS, and Linux systems.

• Ping can be used with various options such...read more
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Q3. Explain how to dual boot system
Ans. 
Dual booting allows two operating systems to be installed on one computer, giving the user the option to choose which to use.
• Create a separate partition for each operating system

• Install the first operating system on one partition

• Install the second operating system on the other partition

• Use a boot manager to choose which operating system to boot into

• Examples of boot managers include GRUB and Windows Boot Manager
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Q4. What is virtual machine
Ans. 
A virtual machine is a software emulation of a physical computer that can run multiple operating systems and applications.
• Virtual machines allow for efficient use of hardware resources by sharing them among multiple virtual machines

• They provide a secure and isolated environment for running applications

• Virtual machines can be easily created, cloned, and moved between physical hosts

• Examples of virtual machine software in
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Aptitude+coding was asked. Consider this as the very important selection criteria

Design test . Its very likely to be easy

Q1. Technical +HR was the last round. 1. Asked about SAP. 2.Basic python and oops concepts. 3.What does incture do 4. Will you accept any role we assign 5. How will your mechanical degree help us
Ans. Tell you are willing to later in training period you can request them to change your roles
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Q2. Why did you shift to mechanical
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Q3. Be specific about this answer
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