Little Angels Modern High School Software Developer Intern Interview Questions and Answers

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
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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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Q1. What is oops , explain its concepts
Ans. 
OOPs stands for Object-Oriented Programming. It is a programming paradigm based on the concept of objects.
• OOPs concepts include encapsulation, inheritance, polymorphism, and abstraction.

• Encapsulation refers to the bundling of data with the methods that operate on that data.

• Inheritance allows a class to inherit properties and behavior from another class.

• Polymorphism allows objects to be treated as instances of their par...read more
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Q2. What do you know about collections in java explain it
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Collections in Java are classes that represent groups of objects, providing operations for manipulation and iteration.
• Collections framework in Java provides interfaces (e.g. List, Set, Map) and classes (e.g. ArrayList, HashSet, HashMap) for storing and manipulating groups of objects.

• Collections offer methods for adding, removing, and accessing elements in a collection.

• Collections also provide methods for sorting, searc...read more
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Q1. Tell me about yourself
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I am a passionate software engineer with experience in developing web applications using various technologies.
• Experienced in developing web applications using HTML, CSS, JavaScript, and frameworks like React and Angular

• Proficient in backend development with Node.js and databases like MongoDB and MySQL

• Familiar with version control systems like Git and deployment tools like Docker
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Q2. Situation based behaviourial questions
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Q1. Microservice what is and Architecture
Ans. 
Microservices are a software development approach where applications are broken down into smaller, independent services that communicate with each other.
• Microservices are small, independent services that work together to form a larger application

• Each microservice is responsible for a specific function or feature

• Microservices communicate with each other through APIs

• Microservices can be developed, deployed, and scaled in...read more
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Q1. Profermance and error management questions
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The first round was aptitude and it has 3 sections

They gave coding regarding java

Q1. Tell about Oops concepts
Ans. 
OOPs concepts are fundamental principles in object-oriented programming, including inheritance, encapsulation, polymorphism, and abstraction.
• Inheritance: Allows a class to inherit properties and behavior from another class. Example: class Dog extends Animal.

• Encapsulation: Bundling data and methods that operate on the data into a single unit. Example: private variables and public methods.

• Polymorphism: Ability to present...read more
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Q2. Difference between method overloading and method overriding
Ans. 
Method overloading is having multiple methods in the same class with the same name but different parameters. Method overriding is having a method in a subclass with the same name and parameters as a method in its superclass.
• Method overloading is resolved at compile time based on the method signature, while method overriding is resolved at runtime based on the object type.

• Method overloading is used to provide different ...read more
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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

Medium leetcode question on graph was given by third party interviewer BarRaiser

Common Aptitude along with HTML5, CSS

Q1. Mostly questions were on HTML5,CSS and web development related questions.
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Q1. Java oops concepts
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Q1. Self intro for yourself
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