Align Technology Full Stack Developer Interview Questions, Process, and Tips

Q1. Tell us about your experience.
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Q2. In english, give me a feedback you received lately.
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Q1. Brief explanation of SOLID principles
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Q2. Ref vs out arguments
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Q1. Question are about interview
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Q2. Answers about interview
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Q1. What are oops concepts in java, explain real time scenario
Ans. 
OOPs concepts in Java include inheritance, polymorphism, encapsulation, and abstraction.
• Inheritance allows a subclass to inherit properties and methods from a superclass.

• Polymorphism allows objects to take on multiple forms and behave differently based on their context.

• Encapsulation hides the implementation details of an object and only exposes necessary information.

• Abstraction allows for the creation of abstract class...read more
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Q2. Uses of interface, inheritance
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Interfaces define contracts for behavior, while inheritance allows for code reuse and polymorphism.
• Interfaces allow for loose coupling and abstraction, enabling multiple implementations of the same behavior.

• Inheritance allows for code reuse and extension of existing classes, reducing code duplication.

• Polymorphism allows objects of different classes to be treated as if they were of the same class, simplifying code and i
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Q3. SQL query for join of tables
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SQL query for joining tables
• Use JOIN keyword to combine two or more tables based on a related column

• Specify the columns to be selected using SELECT keyword

• Use ON keyword to specify the condition for joining the tables

• Different types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL OUTER JOIN
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Q4. Java concepts used in your project
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Used Java concepts such as inheritance, polymorphism, and exception handling in my project.
• Implemented inheritance to create a base class and derived classes with specific functionalities.

• Utilized polymorphism to allow objects of different classes to be treated as if they were of the same class.

• Implemented exception handling to handle errors and prevent program crashes.

• Used interfaces to define a set of methods that a ...read more
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Q5. Overloading vs overriding, practical uses
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Overloading is having multiple methods with the same name but different parameters. Overriding is having a method in a subclass with the same name and parameters as a method in the superclass.
• Overloading is used to provide different ways to call a method with different parameters

• Overriding is used to provide a specific implementation of a method in a subclass

• Overloading is resolved at compile-time while overriding is r...read more
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Q1. It was related to core java, spring boot, Microservices
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Q1. More technical round and cofing questions
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Basic leetcode question

Q1. OOPS.Python,SQl,Networks
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Q1. What is HashMap?
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HashMap is a data structure that stores key-value pairs and provides constant time complexity for basic operations.
• HashMap allows quick access to values based on their keys

• Keys must be unique and values can be duplicated

• HashMap is not thread-safe and requires synchronization for concurrent access

• Java's HashMap implementation uses hashing to distribute keys across buckets
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Q2. It’s a collection framework.
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Round duration - 90 minutes
Round difficulty - Medium

Q1. Cycle Detection in a Singly Linked List
You have given a Singly Linked List of integers, determine if it forms a cycle or not.
A cycle occurs when a node's next points back to a previous node in the ...read more
Ans. 
The task is to determine if a given singly linked list forms a cycle or not.
• A cycle occurs when a node's next points back to a previous node in the list.

• To solve this problem, we can use the Floyd's Cycle-Finding Algorithm.

• The algorithm uses two pointers, one moving at a normal pace and the other moving twice as fast.

• If there is a cycle, the fast pointer will eventually catch up to the slow pointer.

• If the fast pointer ...read more
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Round duration - 60 minutes
Round difficulty - Medium

Q1. Minimum Depth Of Binary Tree
You have been given a Binary Tree of integers, find the minimum depth of this Binary Tree. The minimum depth of a Binary Tree is the number of nodes along the shortest path fro...read more
Ans. 
The minimum depth of a binary tree is the number of nodes along the shortest path from the root node down to the nearest leaf node.
• The minimum depth can be found by performing a breadth-first search (BFS) traversal of the binary tree

• During the BFS traversal, keep track of the current level and increment the depth by 1 for each level

• Stop the BFS traversal when a leaf node is encountered and return the depth as the minim
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Q2. Intersection Of Two Arrays
You are given two arrays 'A' and 'B' of size 'N' and 'M' respectively. Both these arrays are sorted in non-decreasing order. You have to find the ...read more
Ans. 
The problem is to find the intersection of two sorted arrays.
• Use two pointers to iterate through the arrays.

• Compare the elements at the current pointers and move the pointers accordingly.

• If the elements are equal, add it to the intersection array and move both pointers.

• If the element in the first array is smaller, move the first pointer.

• If the element in the second array is smaller, move the second pointer.

• Repeat until...read more
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Q3. Operating System Question
What is the difference between a mutex and a semaphore
Ans. 
A mutex is a binary semaphore used for mutual exclusion, while a semaphore is a generalized synchronization primitive.
• Mutex is used to protect a critical section of code, allowing only one thread to access it at a time.

• Semaphore is used to control access to a shared resource, allowing multiple threads to access it simultaneously.

• Mutex has ownership, meaning the thread that locks it must unlock it.

• Semaphore does not hav...read more
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Round duration - 60 minutes
Round difficulty - Easy

Q1. Technical Questions
It was a managerial round. The interviewer started by introducing himself and then asked for my introduction. We then had an in-depth discussion on Cloud Computing, its importance and di...read more
Ans. 
The interviewer asked about Cloud Computing, OSI layers, network security, and security protocols.
• Discussed the importance of Cloud Computing

• Talked about the different OSI layers

• Explored the significance of network security in today's world

• Discussed various security protocols in place

• Had a healthy and friendly discussion
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Round duration - 25 minutes
Round difficulty - Easy

Q1. Basic HR questions
The interviewer introduced himself and then asked for my introduction. He then asked me why I wanted to join F5 networks and why they should hire me. He then told me in-depth about the co...read more
Ans. 
I wanted to join F5 networks because of their strong reputation in the industry and their commitment to innovation and customer satisfaction.
• I am impressed by F5 networks' track record of delivering cutting-edge solutions to their clients.

• I believe my skills and experience align well with the company's goals and values.

• F5 networks' focus on customer satisfaction resonates with my own commitment to providing excellent s...read more
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Easy Aptitude questions that covers all sections.

It was a pen and paper based coding test where we have to write 2 codes in 1hr. 1st one is easy and second one is medium level.

Q1. Technical Interview with 3 panel members which lasted for 1hr.
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Q2. DSA, DBMS concepts and a SQL query, 2 Puzzles
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Q1. This is basically a Technical+Hr round(final round) where all the 6 panel members will test you with different questions. It lasted for more than 1hr 20 mins.
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Q2. A coding question, DBMS questions, puzzles and mainly on Resume.
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