ALLEN Career Institute Senior Software Engineer Interview Questions and Answers

Coding test are assessments that are designed to evaluate a developer's coding skills and aptitude.

An aptitude test is an exam used to determine an individual's skill or propensity to succeed in a given activity

Leetcode questions on Java, Go

Theory based questions

Q1. What is the XPath?
Ans. 
XPath is a query language used for selecting nodes from an XML document.
• XPath stands for XML Path Language

• It is used to navigate through elements and attributes in an XML document

• XPath uses path expressions to select nodes or node-sets in an XML document

• Example: /bookstore/book[1]/title selects the title of the first book in a bookstore
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Q2. Difference between static and non-static?
Ans. 
Static variables are shared among all instances of a class, while non-static variables belong to individual instances.
• Static variables are declared using the 'static' keyword, while non-static variables are not.

• Static variables are initialized only once at the start of the program, while non-static variables are initialized each time an instance is created.

• Static variables can be accessed using the class name, while no...read more
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Q1. Coding question: Given a sorted array of numbers. All numbers have freq of 2 in array except one number. Find that number with T.C of logn
Ans. 
Find the single number in a sorted array with frequency of 2 for all other numbers.
• Use binary search to find the number with different frequency.

• Check if the mid element is at even or odd index to determine which side to search next.

• Example: Input array [1, 1, 2, 2, 3, 3, 4, 4, 5] should return 5.
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Q2. Print left view of tree
Ans. 
Print the left view of a tree by traversing the tree from left to right at each level
• Traverse the tree using level order traversal

• Print the first node at each level encountered during traversal
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Q1. Detailed discussion on projects
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Q2. Questions on O.S like about deadlocks,etc..
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They asked some programs like fibbonaccy,armstring number,happy number

They asked some programs and technical questions on java

Q1. What's your goal
Ans. 
My goal is to continuously learn and grow in the field of software development, while contributing to innovative projects and making a positive impact.
• Continuous learning through courses, workshops, and hands-on experience

• Contributing to innovative projects by collaborating with team members

• Making a positive impact by developing efficient and user-friendly software solutions
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Q2. What can you do
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Q3. Exceptionsalary
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Q1. Basic questions for ADF
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Q1. Basic HR round for CTC and notice period
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Q1. Design a distributed system with 10mil users
Ans. 
Design a distributed system to handle 10 million users.
• Use a microservices architecture to break down the system into smaller, manageable components.

• Implement load balancing to distribute user requests across multiple servers.

• Utilize a distributed database to store user data and ensure scalability.

• Implement caching mechanisms to improve performance and reduce database load.

• Use message queues for asynchronous communicat...read more
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