20+ Deccan International School Interview Questions and Answers

Commonly used Unix commands for listing files, creating directories, and changing directories.

• List files: ls (list files in current directory), ls -l (detailed list), ls -a (include hidden files)

• Create directories: mkdir (make directory)

• Change directories: cd (change directory), cd .. (move up one directory)

Bubble sort is a simple sorting algorithm that repeatedly steps through the list, compares adjacent elements, and swaps them if they are in the wrong order.

• Compares adjacent elements and swaps them if they are in the wrong order

• Repeats this process until the list is sorted

• Not efficient for large datasets, has a time complexity of O(n^2)

• Example: [5, 3, 8, 2, 1] -> [3, 5, 2, 1, 8] -> [3, 2, 1, 5, 8] -> [2, 1, 3, 5, 8] -> [1, 2, 3, 5, 8]

The date of joining will be determined after the selection process. Certificates required may include educational qualifications, relevant training, and any specific certifications related to the job role.

• Date of joining will be communicated post selection.

• Certificates needed may include educational qualifications.

• Relevant training certificates may be required.

• Specific certifications related to the job role may also be necessary.

Program to split two strings into an array of strings

• Use the split() method to split the strings

• Specify the delimiter to split the strings

• Store the split strings in an array

The software development life cycle (SDLC) is a process used by software development teams to design, develop, test, and deploy software.

• SDLC consists of several phases including planning, analysis, design, implementation, testing, and maintenance.

• Each phase has specific goals and deliverables that must be completed before moving on to the next phase.

• Examples of SDLC models include Waterfall, Agile, and DevOps.

• SDLC helps ensure that software projects are completed on time, wi...read more

this() is used in Java to call a constructor of the same class.

• this() can be used to call a constructor with default arguments.

• It can also be used to call a constructor with specific arguments.

• this() must be the first statement in a constructor.

• It can only be used inside a constructor.

• Example: public MyClass(int x) { this(x, 0); }

• Example: public MyClass(int x, int y) { this.x = x; this.y = y; }

OOPs stands for Object-Oriented Programming. Inheritance is a feature in OOPs where a class inherits properties and behaviors from another class.

• OOPs is a programming paradigm based on the concept of objects, which can contain data in the form of fields and code in the form of procedures.

• Inheritance allows a class to inherit properties and methods from another class. It promotes code reusability and helps in creating a hierarchy of classes.

• For example, a 'Vehicle' class can h...read more

SQL is based on the English language.

• SQL stands for Structured Query Language

• It is based on relational algebra and tuple relational calculus

• SQL uses English-like syntax for querying databases

• Example: SELECT * FROM table_name WHERE condition;

Object-oriented programming concepts including encapsulation, inheritance, polymorphism, and abstraction.

• Encapsulation: bundling data and methods that operate on that data within a single unit

• Inheritance: creating new classes from existing ones, inheriting their properties and methods

• Polymorphism: ability of objects to take on multiple forms, often achieved through method overriding

• Abstraction: hiding implementation details and only exposing necessary information to users

Call by reference passes the address of the variable while call by value passes the value itself.

• Call by reference allows the function to modify the original variable

• Call by value creates a copy of the variable for the function to use

• Call by reference is more memory efficient for large data types

• Call by value is safer as it prevents unintended changes to the original variable

I handle pressure situations by staying organized, prioritizing tasks, seeking help when needed, and taking breaks to recharge.

• Stay organized by creating a to-do list or using a project management tool

• Prioritize tasks based on deadlines and importance

• Seek help from colleagues or supervisors if feeling overwhelmed

• Take short breaks to clear your mind and recharge

Data in ROM is stored permanently and cannot be modified or erased.

• Data is programmed into ROM during manufacturing process

• Stored using non-volatile memory cells

• Read-only access, cannot be modified or deleted

• Examples: firmware, BIOS

WFH lacks social interaction, may lead to distractions and lack of work-life balance.

• Lack of face-to-face interaction with colleagues and managers

• Difficulty in separating work and personal life

• Potential for distractions at home

• Limited access to office resources and equipment

• May lead to feelings of isolation and loneliness

The latest news in information technology includes advancements in artificial intelligence, cybersecurity, and cloud computing.

• Artificial intelligence continues to be a major focus, with developments in machine learning and natural language processing.

• Cybersecurity remains a critical concern, with an increase in cyber attacks and the need for stronger defense mechanisms.

• Cloud computing is evolving rapidly, with a shift towards hybrid and multi-cloud environments for improved ...read more

Garbage collection is an automatic memory management process in Java.

• Garbage collection frees up memory by removing objects that are no longer in use.

• Java uses a mark-and-sweep algorithm to identify and remove unused objects.

• The System.gc() method can be used to suggest garbage collection, but it is not guaranteed to run immediately.

• Garbage collection can impact performance, so it is important to optimize code to minimize unnecessary object creation.

Program to generate Fibonacci sequence

• Start with two initial numbers 0 and 1

• Add the previous two numbers to get the next number

• Repeat the process to generate the sequence

Constructor in JAVA is a special type of method used to initialize objects. It has the same name as the class and no return type.

• Constructors are called when an object is created using the 'new' keyword.

• They can be used to initialize instance variables or perform any other setup tasks.

• Default constructors are automatically provided by Java if no constructor is defined in the class.

• Parameterized constructors can be used to initialize objects with specific values.

• Example: publi...read more

Git is a version control system used for tracking changes in code and collaborating with others.

• Git allows for branching and merging of code

• It tracks changes made to code over time

• It allows for collaboration with others on the same codebase

• Git can be used for both personal and professional projects

Structures and unions are used to group related data members in a program.

• Structures are used to group related data members of different data types.

• Unions are used to group related data members of the same data type.

• Structures allocate memory for each data member, while unions allocate memory for the largest data member.

• Structures are used when all data members need to be accessed separately, while unions are used when only one data member needs to be accessed at a time.

Oops concept in Java

• Object-oriented programming paradigm

• Encapsulation, Inheritance, Polymorphism, Abstraction

• Classes and Objects

• Access Modifiers

• Interfaces and Abstract Classes