Capillary Technologies Software Developer Intern Interview Questions and Answers

Q1. DSA Array, String and Hashmap questions
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Q2. Functional programming java questions
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Q1. Spring and spring boot related
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Q2. HLD scenario level questions
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Q3. SQL queries nested and joins
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Q4. DB related questions and experience level questions and previous project situations related questions
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Q5. Security level questions like XSS vulnerability and SQL injection
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Q1. Java springboot basic to intermediate question
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Q2. Java stream questions
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Q1. Easy level DSA questions
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Q2. Project based questions
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Q1. They asked first question related to Spring security .
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Q2. Questions related to rest API Given scenario and asked approach
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Q3. Database related like procedures call in db and also in springboot
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Q4. Core java related to collections
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Q1. In second round , interviewer asked me to write logic for Array sort
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Q2. Singleton class
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Q3. Design pattern like singleton and factory , dao
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Q4. Spring data JPA , jdbc connection
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Q5. Hibernate annotation
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Q1. Related to projects what we had done
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Q2. Difficult situations what u face
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Handling difficult situations by staying calm, analyzing the problem, and finding a solution.
• Remaining calm under pressure

• Identifying the root cause of the problem

• Collaborating with team members to brainstorm solutions

• Prioritizing tasks to address the issue efficiently
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Q3. Code standardization
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Portions covered:- maths, DBMS, OS, programming and verbal ability question

Q1. Explanation about projects in detail.
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Q2. Basics of SQL and DBMS
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Q1. How to debug in python
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Q2. For loop vs while loop. Full explanation, not only points
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Q1. Write a Simple GET, POST Flask Application?
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Q2. Assign Values to a Cookie - Flask Application
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- Convert a given input of keys-values to value-keys using Python

2 coding question for 60 mins. One array based question and one string based question.

Q1. Oops 2 pillars with examples ?
Ans. 
Oops 2 pillars are Abstraction and Encapsulation.
• Abstraction: Hiding unnecessary details and showing only relevant information. Example: Car dashboard displaying speed without showing internal engine details.

• Encapsulation: Bundling data and methods that operate on the data into a single unit. Example: Class in object-oriented programming encapsulates data and methods.
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Q2. Inheritance and it's types with examples ?
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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

• Single inheritance: a class inherits from only one parent class. Example: class Dog inherits from class Animal

• Multiple inheritance: a class inherits from multiple parent classes. Example:...read more
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Q1. My expertise are in golang. And all the questions were straight forward around golang.
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Q2. What is concurrency. How to check performance of applications. How to handle concurrency. How many no of goroutines can be created and so on.
Ans. 
Concurrency is the ability of a system to run multiple tasks simultaneously. Performance of applications can be checked using profiling tools. Concurrency can be handled using synchronization techniques like mutexes and channels.
• Concurrency allows multiple tasks to run concurrently, improving performance and responsiveness.

• Performance of applications can be checked using profiling tools like Go's built-in 'pprof' packa...read more
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Q1. How to make sure there are no vulnerabilities. What engineering principles you follow.
Ans. 
To ensure no vulnerabilities, follow secure coding practices, conduct regular security audits, use encryption, and stay updated on security threats.
• Follow secure coding practices such as input validation, output encoding, and parameterized queries.

• Conduct regular security audits to identify and address vulnerabilities in the code.

• Use encryption to protect sensitive data in transit and at rest.

• Stay updated on security t...read more
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Basic OOP questions for python programming language

Q1. What's abstraction
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Abstraction is the concept of hiding complex implementation details and showing only the necessary information to the user.
• Abstraction allows users to focus on what an object does instead of how it does it

• It helps in reducing complexity and improving efficiency in software development

• Example: In object-oriented programming, abstract classes and interfaces are used to achieve abstraction
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Q2. What's the difference between SQL and NoSQL database
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SQL databases are relational databases with structured data, while NoSQL databases are non-relational databases with flexible, unstructured data.
• SQL databases use structured query language for defining and manipulating data, while NoSQL databases use different query languages or APIs.

• SQL databases are table-based, with a predefined schema, while NoSQL databases are document, key-value, wide-column, or graph-based.

• SQL d...read more
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Q1. Reverse a linked list
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Reverse a linked list by changing the direction of pointers
• Start with three pointers: current, prev, and next

• Iterate through the linked list, updating pointers to reverse the direction

• Update the head of the linked list to the last node after reversing
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Q2. Implement binary search algorithm
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Binary search algorithm efficiently finds the target value in a sorted array.
• Start by defining the low and high indices of the array.

• Calculate the mid index and compare the target value with the value at mid.

• If target is less than mid value, update high to mid-1; if greater, update low to mid+1.

• Repeat until target is found or low is greater than high.
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Q1. Brief Introduction and basic questions
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Q2. Future plans and how am i going to achieve them
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