10+ Interview Questions and Answers

Binary search is a search algorithm that finds the position of a target value within a sorted array.

• Binary search requires a sorted array as input.

• It compares the target value with the middle element of the array.

• If the target value is equal to the middle element, the search is successful.

• If the target value is less than the middle element, the search continues on the left half of the array.

• If the target value is greater than the middle element, the search continues on the ri...read more

Sorting an array without using predefined functions

• Implement a sorting algorithm like bubble sort, insertion sort, or selection sort

• Loop through the array and compare adjacent elements to swap them if necessary

• Repeat the loop until the array is sorted in ascending or descending order

Reverse a string without using predefined functions.

• Iterate through the string from the end and append each character to a new string.

• Use a loop to swap the first and last characters, then move towards the middle.

• Convert the string to a list, reverse the list, then join the list back into a string.

My comfortable programming language is Java.

• Strong object-oriented programming skills

• Experience with Java frameworks like Spring

• Proficient in writing clean and efficient code

Topology is the study of geometric properties and spatial relations unaffected by the continuous change of shape or size.

• Topology is concerned with the properties of space that are preserved under continuous transformations, such as stretching or bending.

• It is used in mathematics, physics, computer science, and engineering.

• Types of topology include point-set topology, algebraic topology, and differential topology.

• Examples of topological properties include connectedness, compa...read more

A constructor is a special method used to initialize objects in a class. It can have different types based on parameters.

• A constructor has the same name as the class it belongs to.

• It is automatically called when an object is created.

• Constructors can be parameterized or non-parameterized.

• Parameterized constructors accept arguments to initialize object properties.

• Non-parameterized constructors have no arguments and provide default values.

• Constructors can be overloaded, allowing...read more

To interchange values of 2 variables, use a temporary variable to store one value before swapping them.

• Declare a temporary variable to store the value of one variable

• Assign the value of the first variable to the temporary variable

• Assign the value of the second variable to the first variable

• Assign the value of the temporary variable to the second variable

C is a procedural programming language while C++ is an extension of C with added features like object-oriented programming.

• C is a procedural language while C++ supports both procedural and object-oriented programming.

• C++ has additional features like classes, objects, inheritance, and polymorphism.

• C++ supports function overloading and namespaces, which are not present in C.

• C++ has a standard template library (STL) that provides useful data structures and algorithms.

• C++ allows ...read more

Windows PowerShell is a command-line shell and scripting language designed for system administration tasks.

• It is built on the .NET Framework

• It allows users to automate tasks using scripts

• It supports remote management of Windows machines

• It has a rich set of commands and utilities

• Example: Get-Process command retrieves information about running processes

• Example: Set-ExecutionPolicy command changes the PowerShell execution policy

Types of network include LAN, WAN, MAN, WLAN, PAN, SAN, CAN, and VPN.

• LAN (Local Area Network) is a network that covers a small area such as a home, office, or building.

• WAN (Wide Area Network) is a network that covers a large geographical area such as a city, country, or even the world.

• MAN (Metropolitan Area Network) is a network that covers a larger area than a LAN but smaller than a WAN, typically a city or town.

• WLAN (Wireless Local Area Network) is a LAN that uses wireless ...read more

Java is a popular object-oriented programming language known for its platform independence and extensive libraries.

• Java is designed to be simple, secure, and portable.

• It is used for developing a wide range of applications, from desktop to mobile and web.

• Java programs are compiled into bytecode, which can run on any Java Virtual Machine (JVM).

• It supports multithreading, exception handling, and automatic memory management.

• Java has a vast ecosystem of libraries and frameworks, s...read more

parseInt in Java is a method used to convert a string to an integer.

• parseInt is a static method in the Integer class.

• It takes a string as input and returns the corresponding integer value.

• If the string cannot be parsed as an integer, it throws a NumberFormatException.

Topology is the study of the properties and characteristics of geometric objects that are unchanged by continuous transformations.

• Topology studies the properties of objects that remain the same under continuous transformations.

• It focuses on the concepts of continuity, connectivity, and proximity.

• Examples of topological objects include points, lines, curves, surfaces, and higher-dimensional spaces.

• Topology is used in various fields such as mathematics, computer science, physic...read more

Polymorphism is the ability of a single function or method to operate on different types of data.

• Polymorphism allows objects of different classes to be treated as objects of a common superclass.

• There are two types of polymorphism: compile-time (method overloading) and runtime (method overriding).

• Example: Inheritance in object-oriented programming languages like Java allows for polymorphism.

OOPs concepts in Java refer to the principles of Object-Oriented Programming such as 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 with public getter and setter methods.

• Polymorphism: Ability of a method to do different things based on the...read more