Sourcebits Technologies Mobile App Developer Interview Questions and Answers

Code for arranging numbers in sorted order

• Use a sorting algorithm like bubble sort, insertion sort, or quicksort

• Determine if the numbers are integers or floating point numbers

• Consider the size of the input array and the time complexity of the algorithm

• Check for edge cases like empty array or array with only one element

Data mining is the process of discovering patterns and insights from large datasets.

• It involves using statistical and machine learning techniques to analyze data

• The goal is to extract useful information and knowledge from the data

• Examples include identifying customer buying patterns or predicting stock prices

• Data mining can also be used in fields such as healthcare to identify disease risk factors

Compiler is needed to translate high-level programming language code into machine code.

• Compilers are used to convert human-readable code into machine-readable code.

• They help in detecting errors and bugs in the code before execution.

• Compilers optimize the code for better performance and efficiency.

• Examples of compilers include GCC, Clang, and Visual C++.

Windows OS is a proprietary operating system developed by Microsoft while Ubuntu is a free and open-source operating system based on Linux.

• Windows OS is more widely used in desktops and laptops while Ubuntu is popular among developers and servers.

• Windows OS has a graphical user interface (GUI) while Ubuntu can be used with or without a GUI.

• Windows OS has a larger selection of software and games available while Ubuntu h...read more

64-bit architecture allows for larger memory addressing and faster processing speeds.

• 64-bit architecture can address more memory than 32-bit architecture

• 64-bit architecture can perform more calculations per clock cycle

• 64-bit architecture is required for certain software applications, such as video editing or scientific simulations

Sorting is the process of arranging data in a particular order.

• Sorting is used to organize data for easier access and retrieval.

• There are various sorting algorithms such as bubble sort, insertion sort, quicksort, etc.

• Sorting can be done in ascending or descending order.

• Examples of sorting include sorting a list of names alphabetically or sorting a list of numbers in numerical order.

Heap sorting is a comparison-based sorting algorithm that divides the input into a sorted and an unsorted region, while insertion sorting builds the final sorted array one item at a time.

• Heap sorting has a worst-case time complexity of O(n log n), while insertion sorting has a worst-case time complexity of O(n^2)

• Heap sorting is not an in-place sorting algorithm, while insertion sorting is

• Heap sorting is more efficient ...read more

Type casting is the process of converting a variable from one data type to another.

• It is also known as type conversion.

• It can be done implicitly or explicitly.

• Explicit type casting involves the use of casting operators.

• Examples include converting an integer to a string or a float to an integer.

• Type casting can lead to loss of data or precision.

Inheritance is a mechanism in OOP where a new class is derived from an existing class.

• Single Inheritance: A derived class inherits from a single base class.

• Multiple Inheritance: A derived class inherits from multiple base classes.

• Multilevel Inheritance: A derived class is created from another derived class.

• Hierarchical Inheritance: Multiple derived classes inherit from a single base class.

• Hybrid Inheritance: Combinatio

The source code for doubly linked list is a data structure that contains nodes with pointers to the previous and next nodes.

• Declare a node struct with data, prev, and next pointers

• Create a head and tail pointer to the first and last nodes

• Implement functions to add, remove, and traverse nodes

Software development life cycle (SDLC) is a process followed to develop software. Testing is done to ensure quality and functionality.

• SDLC is a process that includes planning, designing, coding, testing, and maintenance.

• Testing is done to identify and fix defects, ensure functionality, and improve quality.

• Types of testing include unit testing, integration testing, system testing, and acceptance testing.

• Testing can be m...read more

Windows and Linux are two different operating systems. I prefer Linux because of its open-source nature and flexibility.

• Windows is a proprietary operating system developed by Microsoft, while Linux is an open-source operating system.

• Linux is more flexible and customizable than Windows.

• Linux is known for its stability and security.

• Windows is more user-friendly and has better compatibility with software.

• Examples of Linux...read more

I am a highly motivated and experienced professional with a strong background in marketing and sales.

• I have over 10 years of experience in the marketing industry, working for both small startups and large corporations.

• I have a proven track record of successfully implementing marketing strategies that have resulted in significant revenue growth.

• I am skilled in market research, competitor analysis, and customer segmentat...read more

My CGPA is lower than my school percentage due to various factors.

• Different grading systems: CGPA is based on a different scale than school percentage.

• Difficulty level: The subjects in college may be more challenging than in school.

• Personal circumstances: I may have faced personal challenges that affected my academic performance.

• Learning style: College may require different study techniques that I am still adapting to.

• ...read more

C++ is an extension of C with object-oriented programming features.

• C++ supports classes and objects while C does not.

• C++ has better support for function overloading and templates.

• C++ has a more complex syntax compared to C.

• C++ has a standard library that includes many useful functions.

• C++ is generally considered to be a more powerful language than C.

Java Virtual Machine (JVM) is an abstract machine that enables a computer to run Java programs.

• JVM is responsible for interpreting the compiled Java code and executing it on the computer.

• It provides a platform-independent environment for Java programs to run on different operating systems.

• JVM has several components such as class loader, bytecode verifier, and execution engine.

• JVM memory is divided into different region...read more

Inheritance is a way to create new classes based on existing classes. Polymorphism allows objects of different classes to be treated as if they were of the same class.

• Inheritance allows a child class to inherit properties and methods from a parent class.

• Polymorphism allows a method to be used with objects of different classes that share a common interface.

• Example of inheritance: A car class can be inherited by a sports...read more

My strength is my ability to remain calm and focused during incidents. My weakness is that I can sometimes overanalyze situations.

• Strength: Ability to remain calm and focused during incidents

• Weakness: Tendency to overanalyze situations

• Strength: Quick decision-making skills

• Weakness: Difficulty in delegating tasks

• Strength: Effective communication with team members

• Weakness: Struggle with time management

I have been actively involved in volunteering and participating in various clubs and organizations.

• Volunteering at local animal shelter

• Member of debate club and Model UN

• Participated in community service projects with National Honor Society

• Organized fundraising events for charity organizations

TCS is a global IT services and consulting company.

• TCS stands for Tata Consultancy Services.

• It is one of the largest IT services companies in the world.

• TCS provides a wide range of services including software development, consulting, and business process outsourcing.

• The company has a strong presence in various industries such as banking, healthcare, and retail.

• TCS is known for its innovation and use of emerging technol...read more

Software development life cycle is a process of planning, designing, developing, testing, and deploying software.

• SDLC is a framework that guides the development of software.

• It involves several stages such as planning, designing, coding, testing, and deployment.

• Each stage has its own set of activities and deliverables.

• The stages are often iterative, meaning they may be repeated until the desired outcome is achieved.

• Exam...read more

DBMS queries are used to interact with a database. Common queries include select, delete, insert, update, and drop.

• SELECT: Retrieves data from a database table

• DELETE: Removes data from a database table

• INSERT: Adds new data into a database table

• UPDATE: Modifies existing data in a database table

• DROP: Deletes an entire database table

Studio.h is a header file in C programming used for input/output operations.

• Studio.h contains functions like printf() and scanf() for input/output operations.

• Preprocessor directives like #define and #include are used to include the header file.

• Studio.h is part of the standard C library and is included in most C compilers.

• It is important to include the header file in your program if you plan to use input/output function

TCS is a leading global IT services company with a strong reputation for innovation and client satisfaction.

• TCS has a proven track record of delivering high-quality IT solutions to clients worldwide.

• TCS offers a wide range of services and solutions, including consulting, digital transformation, and business process outsourcing.

• TCS has a strong focus on innovation and invests heavily in research and development.

• TCS has ...read more

Different Linux OS have different features, package managers, and user interfaces.

• Linux distributions have different package managers, such as apt, yum, and pacman.

• Some distributions are designed for specific purposes, such as Kali Linux for penetration testing.

• User interfaces can vary greatly, with some distributions using GNOME, KDE, or Xfce.

• Some distributions are more lightweight and optimized for older hardware, su

Cloud computing is the delivery of computing services over the internet.

• Cloud computing allows users to access data and applications from anywhere with an internet connection.

• It eliminates the need for physical servers and hardware, reducing costs and increasing scalability.

• Examples include Amazon Web Services, Microsoft Azure, and Google Cloud Platform.