Qmex Steel Construction Software Development Engineer Interview Questions and Answers

Q1. Explain how rest api authenticated
Ans. 
REST API authentication is the process of verifying the identity of clients accessing the API.
• Authentication can be achieved using various methods such as API keys, tokens, or OAuth.

• API keys are unique identifiers issued to clients and are included in the request headers for authentication.

• Tokens are generated upon successful login and are used to authenticate subsequent requests.

• OAuth is a protocol that allows clients...read more
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Q1. Not attended yet
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My name is mounika qualification graduate cmpltd passing year 2022 my family background I have a 5 members father mother sister brother me my father is medical and fancy store my mother is home maker my sister is graduate cmpltd my brother is inter 1st year my hobbys listing music watching tv

Q1. Name qualification passing year hobbys self introduction skills
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Q2. Name qualification graduate skills
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Q3. Group discussion name qualification passing year hobbys family background
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Standard process in hackerrank

Q1. Standard interview with live coding
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Q2. Find the second largest element in an array
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Q1. Describe yourself in 3 words
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Aptitude, electronics

Q1. Transformer and power supply
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Q2. What is a pointer
Ans. 
A pointer is a variable that stores the memory address of another variable.
• Pointers are used to access and manipulate memory locations directly.

• They are commonly used in programming languages like C and C++.

• Example: int *ptr; // declares a pointer to an integer variable
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Q1. What all thinks happen on powering on a device.
Ans. 
When a device is powered on, several processes occur including booting up the operating system, initializing hardware components, loading necessary drivers, and launching user interface.
• Booting up the operating system

• Initializing hardware components

• Loading necessary drivers

• Launching user interface
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The questions are easy as compare to other companies. The round was online test

Q1. The interview was easy and basically based on resume and projects done in the past
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Q2. The interview was easy and mostly of weakness and strength
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Sql, nodejs JavaScript

Q1. Joins in sql, differences between join
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Q2. Sql query functions used in sql
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Q1. Node.js question were asked
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Q2. Project questions were also being asked
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Q1. General Behavioural questions
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Q2. Culture fit questions
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Q1. What is your understanding of memory concepts in the C programming language?
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90 min, DSA, hacker platform 3 question

Q1. 2D DP WITH SPACE OPTIMIZATION
Ans. 
2D DP with space optimization is a technique to reduce memory usage while solving dynamic programming problems.
• Use a 1D array instead of a 2D array to store values in dynamic programming problems.

• Update the values in the 1D array based on the dependencies between subproblems.

• Example: Solving the longest common subsequence problem using 2D DP with space optimization.
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Q2. GRAPH WITH BFS ON TREE
Ans. 
Breadth First Search (BFS) on a tree involves visiting nodes level by level starting from the root.
• Start by visiting the root node, then visit all its children before moving on to the next level

• Use a queue data structure to keep track of nodes to visit next

• Repeat the process until all nodes have been visited
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