Infosys Specialist Programmer Interview Questions, Process, and Tips

Coding test will be pretty hard. 2 questions will be giv

Coding test will be pretty hard. Have to choose any one of 2 questions given and solve it in 45 mins.
Atleast 70-80% test case needs to be cleared to pass

Q1. Drill down on the tech stack mentioned in CV
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Q2. Basic concepts of Java
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Q3. Advanced java like stream, sealed classes, webflux etc
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Q4. Concepts on cloud, docker, kubernetes etc
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I was provided with 2 DSA questions, and was given an option to pick one and solve in 45 mins duration. Since there were some problems in opening my coding assessment link, interviewer provided both questions in virtual meet chat.
Question1 - you are given N(len of arrays), X(int), Y(int), Z(int), A(int[]), B(int[]), sum = 0 and 3 arithmetic operations that can be performed using A, B, X, Y, Z upon sum. Any operations including X, Y, Z is possible only when their values are greater than 0. After N iterations you have to obtain the maximum sum value that can be obtained.
Question2 - Find K-most frequent element in an array

Q1. Provided a time&date API, asked to display the time on screen and update it every second like a clock using react.
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Q2. Design a promise wrapper that accepts two parameters - a promise function and integer timeout value. If the promise function resolve before timeout, resolve it else reject it.
Ans. 
Design a promise wrapper with timeout for resolving or rejecting a promise function.
• Create a function that takes a promise function and timeout value as parameters.

• Inside the function, create a new Promise that wraps the original promise function.

• Use Promise.race to race between the original promise and a timeout promise.

• If the original promise resolves before timeout, resolve the wrapper promise with the result.

• If the...read more
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Q3. Pros and cons of Monolith and microservice architecture.
Ans. 
Monolith vs microservice architecture pros and cons
• Monolith: easier to develop and test, simpler deployment process

• Monolith: can be harder to scale and maintain as it grows

• Microservices: scalable and flexible, easier to update and maintain

• Microservices: complex to develop and deploy, requires more monitoring and management

• Example: Monolith - traditional web applications, Example: Microservices - Netflix, Amazon
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Infosys conducts coding assessment on the HackWithInfy platform. The assessment includes a medium-level problem & the rest are hard-level similar to LeetCode's. The total duration of the test is 3 hours.

Q1. The question is based on string and it is a hard-level question. (I can't recognise it now)
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Q2. Reverse the linked list.. i solved it by floyed warshall algorithm then interviwer tell me solve it recursive way.
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Q3. What is deadlock in OS & how it overcome?
Ans. 
Deadlock in OS occurs when two or more processes are unable to proceed because each is waiting for the other to release a resource.
• Deadlock happens when processes have acquired resources but are waiting for additional resources that are held by other processes.

• Four conditions must hold for deadlock to occur: mutual exclusion, hold and wait, no preemption, and circular wait.

• Deadlock can be prevented by using techniques ...read more
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Q4. Which are the process scheduling algorithms and explain each algorithm.
Ans. 
Process scheduling algorithms determine the order in which processes are executed by the CPU.
• First Come First Serve (FCFS) - Processes are executed in the order they arrive.

• Shortest Job Next (SJN) - Process with the shortest burst time is executed next.

• Round Robin (RR) - Each process is assigned a fixed time slice for execution.

• Priority Scheduling - Processes are executed based on priority levels assigned to them.

• Multi...read more
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Q5. What are the joins in DBMS and explain each join
Ans. 
Joins in DBMS are used to combine rows from two or more tables based on a related column between them.
• Inner Join: Returns rows when there is at least one match in both tables.

• Left Join: Returns all rows from the left table and the matched rows from the right table.

• Right Join: Returns all rows from the right table and the matched rows from the left table.

• Full Outer Join: Returns rows when there is a match in one of the ...read more
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Q6. Write a SQL query to print n'th highest salary with full details
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SQL query to retrieve the n'th highest salary with full details
• Use the ORDER BY clause to sort salaries in descending order

• Use the LIMIT clause to retrieve the n'th highest salary

• Join with the employee table to get full details
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Q7. What are late binding and early binding?
Ans. 
Late binding and early binding are concepts in programming related to when the binding of a method to its implementation occurs.
• Early binding refers to the process of linking a method call to the method implementation at compile time.

• Late binding refers to the process of linking a method call to the method implementation at runtime.

• Early binding is also known as static binding, while late binding is also known as dynam...read more
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Q8. What is inheritance and explain each type
Ans. 
Inheritance is a concept in object-oriented programming where a class inherits properties and behaviors from another class.
• Types of inheritance: single inheritance, multiple inheritance, multilevel inheritance, hierarchical inheritance, hybrid inheritance

• Single inheritance: a class inherits from only one base class

• Multiple inheritance: a class inherits from multiple base classes

• Multilevel inheritance: a class inherits ...read more
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Three questions categorized by difficulty: Easy, Medium, and Hard, covering topics such as trees, graphs, and backtracking.

Q1. Tell me about yourself.
Ans. 
I am a dedicated and experienced specialist programmer with a passion for creating efficient and innovative solutions.
• Over 5 years of experience in programming languages such as Java, Python, and C++

• Strong background in developing web applications and software solutions

• Experience working on large-scale projects and collaborating with cross-functional teams

• Certified in Agile methodologies and continuous integration/cont
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Q2. Can you elaborate on the projects you have worked on?
Ans. 
I have worked on various projects including developing web applications, creating mobile apps, and implementing data analytics solutions.
• Developed a web application for a retail company to manage inventory and sales data

• Created a mobile app for a fitness tracking platform to track user activity and provide personalized recommendations

• Implemented a data analytics solution for a financial institution to analyze customer
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Q3. 3 Dsa questions with approach - brute force and efficient. Topics were LinkedList, queue, backtracking, trees.
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Q4. Questions on RDBMS.
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Q5. Questions from OOPS and Networking.
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