SMARTe Software Developer Interview Questions and Answers

Aptitude test

Current affairs

Q1. Puzzle , sql related questions
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Q1. DS Algo, Backend and DB
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Q2. Stack(DS) question and DB based questions
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Q3. Scaling (Horizontal, Vertical) with use cases
Ans. 
Scaling refers to increasing capacity of a system. Horizontal scaling adds more machines, while vertical scaling adds more resources to a machine.
• Horizontal scaling involves adding more machines to a system to increase capacity

• Vertical scaling involves adding more resources to a machine to increase capacity

• Use cases for horizontal scaling include handling increased traffic or adding redundancy

• Use cases for vertical sca...read more
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2 questions of DSA medium to hard

Mcq + dsa JavaScript questions

Q1. JavaScript advance topics and database design topics
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Q1. Situation based question and behavioural questions
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Q1. Print unique numbers in list
Ans. 
Print unique numbers in list
• Iterate through the list and store each number in a set to keep track of unique numbers

• Print out the numbers in the set to display the unique numbers
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Q1. What is Connection pooling
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Connection pooling is a technique to manage database connections efficiently, reducing overhead and improving performance.
• Connection pooling maintains a pool of active database connections for reuse.

• It reduces the overhead of establishing a new connection for each database request.

• Example: A web application can reuse connections from the pool instead of opening new ones for each user request.

• Connection pools can be con...read more
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Q2. What is mounting in docker
Ans. 
Mounting in Docker allows you to share files between the host and containers, enabling data persistence and configuration management.
• Mounting can be done using volumes or bind mounts.

• Volumes are managed by Docker and are stored in a part of the host filesystem which is not directly accessible.

• Example of a volume: `docker run -v my_volume:/data my_image`.

• Bind mounts allow you to specify an exact path on the host, e.g., ...read more
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Q3. What is decorators
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Decorators are a design pattern in Python that allows modifying the behavior of functions or methods at runtime.
• A decorator is a function that takes another function and extends its behavior without explicitly modifying it.

• Common use cases include logging, access control, and caching.

• Example: @staticmethod and @classmethod are built-in decorators in Python.

• Custom decorators can be created using nested functions.

• Example...read more
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Q4. Shell script question
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Round duration - 50 minutes
Round difficulty - Medium

Round duration - 20 minutes
Round difficulty - Medium

Q1. 
Pair Sum Problem Statement
You are given an integer array 'ARR' of size 'N' and an integer 'S'. Your task is to find and return a list of all pairs of elements where each sum of a pair equals 'S'.
Note:
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Ans. 
Given an array and a target sum, find pairs of elements that add up to the target sum.
• Iterate through the array and for each element, check if the complement (target sum - current element) exists in a hash set.

• If the complement exists, add the pair to the result list. Otherwise, add the current element to the hash set.

• Sort the pairs based on the first element and then the second element to meet the required output form
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Round duration - 20 minutes
Round difficulty - Easy

Round duration - 40 minutes
Round difficulty - Hard

Q1. Can you provide an example of how to use pointers in C/C++ and discuss different concepts related to them?
Ans. 
Pointers in C/C++ are variables that store memory addresses. They are used to manipulate memory directly and improve performance.
• Pointers are declared using an asterisk (*) before the variable name.

• Pointers can be used to dynamically allocate memory using functions like malloc() and free().

• Pointers can be used to pass variables by reference to functions.
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