30+ Gold Plus Glass Interview Questions and Answers

Answers to technical questions related to cloud computing, programming, and software development.

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

• There are three types of clouds: public, private, and hybrid.

• Virtualization is the creation of a virtual version of something, such as an operating system, server, storage device, or network resource.

• SaaS (Software as a Service) provides software applications over the internet, while PaaS (Platform as a Servic...read more

Java does not support multiple inheritance. It uses interfaces to achieve similar functionality.

• Java supports single inheritance, where a class can only inherit from one superclass.

• To achieve multiple inheritance-like behavior, Java uses interfaces.

• Interfaces allow a class to implement multiple interfaces, providing access to multiple sets of methods and constants.

• Unlike classes, interfaces cannot be instantiated and can only be implemented by classes.

• Example: class A impleme...read more

Questions related to computer science and programming concepts.

• OOPs stands for Object-Oriented Programming which is a programming paradigm based on the concept of objects.

• DBMS stands for Database Management System which is a software system used to manage and organize data.

• Types of computer networks include LAN, WAN, MAN, PAN, and CAN.

• Tell about yourself by highlighting your education, skills, and work experience.

• Explain your project by discussing its purpose, methodology, an...read more

Main function is required in C program as it is the entry point of the program.

• Main function is where the program starts executing.

• It contains the code that initializes variables, calls functions, and performs other necessary tasks.

• Without main function, the program would not know where to start executing.

• Main function must return an integer value to indicate the status of the program execution.

• Example: int main() { // code here }

I would rate myself 8 out of 10 in Java.

• I have a strong understanding of core Java concepts such as OOP, data structures, and algorithms.

• I have experience in developing Java applications using frameworks like Spring and Hibernate.

• I have also worked on projects involving Java-based technologies like JSP, Servlets, and JDBC.

• However, there is always room for improvement and I am constantly learning and exploring new features and updates in Java.

• Overall, I am confident in my Java...read more

In printf(), f is a format specifier used to display floating-point numbers. conio.h is a header file used for console input and output functions in C.

• f in printf() is a format specifier used to display floating-point numbers, like %f for float and %lf for double.

• conio.h is a header file used for console input and output functions in C, like getch() and clrscr().

Types of joins in SQL and definition of primary key and foreign key.

• Types of joins in SQL include inner join, left join, right join, and full outer join.

• Primary key is a unique identifier for a record in a table.

• Foreign key is a field in a table that refers to the primary key of another table.

• Joins are used to combine data from two or more tables based on a related column.

• Examples of joins include joining a customer table with an orders table based on a customer ID field.

• Anot...read more

Java doesn't use pointers for safety and security reasons.

• Java uses references instead of pointers to avoid memory leaks and null pointer exceptions.

• Pointers can be misused and cause security vulnerabilities.

• Java's garbage collector manages memory automatically, reducing the need for pointers.

• Java's object-oriented design allows for better encapsulation and abstraction without pointers.

Code in C++ using array to perform sorting of strings.

• Use std::sort() function from algorithm library to sort the array of strings.

• Define an array of strings, populate it with strings, and then call std::sort() to sort the array.

• Example: std::string arr[] = {"banana", "apple", "cherry"}; std::sort(arr, arr+3);

The strlen() function is used to find the length of a string in C.

• Include the header file

• Use the strlen() function with the string as argument

• The function returns the length of the string excluding the null character

To install Unix on a PC, you need to create a bootable USB or CD and follow the installation process.

• Download the Unix distribution you want to install

• Create a bootable USB or CD using software like Rufus or UNetbootin

• Insert the bootable USB or CD into your PC and restart it

• Follow the installation process, selecting the appropriate options

• Once the installation is complete, you can boot into Unix by selecting it from the boot menu

Google Earth uses satellite imagery, aerial photography, and GIS data to create a virtual globe that users can explore.

• Google Earth collects high-resolution satellite imagery and aerial photography from various sources.

• It uses GIS (Geographic Information System) data to overlay maps, terrain, and other geographic information.

• Users can navigate the virtual globe by zooming in and out, panning, and tilting to view different locations.

• Google Earth also offers features like Stree...read more

C programming has a structured approach with functions, variables, and control structures.

• C programs are divided into functions that perform specific tasks.

• Variables are declared and defined within the functions.

• Control structures like if-else, loops, and switch-case are used to control the flow of the program.

• Functions can be called from other functions to reuse code.

• C programs have a main() function that is the entry point of the program.

Code in C++ to find prime numbers

• Use a loop to iterate through numbers and check if each number is prime

• A prime number is only divisible by 1 and itself

• Start checking from 2 onwards, as 0 and 1 are not prime numbers

• Optimize by checking up to square root of the number

A list is a collection of items in a specific order.

• Lists can be ordered or unordered

• Examples of list types include arrays, linked lists, and queues

A tuple is a data structure that stores a fixed number of elements of different data types.

• Tuples are immutable, meaning their values cannot be changed once they are assigned.

• They are ordered collections, meaning the order of elements is preserved.

• Example: ('John', 25, 'Male') is a tuple with three elements representing a person's name, age, and gender.

Tuple is immutable and fixed in size, while list is mutable and can change in size.

• Tuple is defined using parentheses, while list is defined using square brackets.

• Tuple elements cannot be changed, while list elements can be modified.

• Tuple is faster than list for iteration and accessing elements.

• Example: tuple = (1, 2, 3) and list = [1, 2, 3]

I am proficient in English and Spanish.

• Proficient in English and Spanish

• Can read, write, and speak both languages fluently

Types of SQL queries and DBMS related questions

• Types of SQL queries: SELECT, INSERT, UPDATE, DELETE

• DBMS related questions: normalization, indexing, transactions

• Example: SELECT * FROM table_name WHERE condition

Oops concept is a programming paradigm that focuses on objects and classes, allowing for code reusability and organization.

• Oops concept involves four main principles: encapsulation, inheritance, polymorphism, and abstraction.

• Encapsulation refers to the bundling of data and methods that operate on the data within a single unit.

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

• Polymorphism enables objects to be treated as instances of their parent...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 polymorphism and inheritance.

• C++ has a standard template library (STL) which provides a collection of classes and functions for common programming tasks.

• C++ allows function overloading while C does not.

• C++ has better type checking and exception handling compared to C.

SQL commands are used to interact with databases to perform various operations like querying, updating, and deleting data.

• SELECT: Retrieves data from a database

• INSERT: Adds new records to a table

• UPDATE: Modifies existing records in a table

• DELETE: Removes records from a table

• CREATE TABLE: Creates a new table in the database

• ALTER TABLE: Modifies an existing table structure

• DROP TABLE: Deletes a table from the database

OOPS concept stands for Object-Oriented Programming System. It is a programming paradigm based on the concept of objects.

• OOPS focuses on creating objects that contain both data and methods to manipulate that data.

• It emphasizes concepts like encapsulation, inheritance, polymorphism, and abstraction.

• Encapsulation refers to bundling data and methods that operate on the data into a single unit.

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

• Poly...read more

Classes can have both implementation and state, while interfaces only have method signatures.

• Classes can have constructors, fields, and methods, while interfaces can only have method signatures.

• A class can implement multiple interfaces, but can only inherit from one class.

• Interfaces are used to achieve abstraction and multiple inheritance in Java.

• Example: Class 'Car' can have fields like 'color' and 'model', while Interface 'Drivable' can have method signatures like 'start()'...read more

A router is a networking device that forwards data packets between computer networks.

• Routes data packets between networks

• Uses IP addresses to determine where to send packets

• Can be used to create a local network

• Can be configured to prioritize certain types of traffic

• Examples include Cisco, Netgear, and TP-Link routers

Python has various data types including integers, floats, strings, lists, tuples, dictionaries, and sets.

• Integers: whole numbers without decimal points (e.g. 5, -3)

• Floats: numbers with decimal points (e.g. 3.14, -0.5)

• Strings: sequences of characters enclosed in quotes (e.g. 'hello', '123')

• Lists: ordered collections of items (e.g. [1, 'apple', True])

• Tuples: ordered, immutable collections of items (e.g. (1, 'banana', False))

• Dictionaries: unordered collections of key-value pairs...read more

A variable is a symbol or placeholder that represents a value that can change or vary.

• Variables are used in programming to store and manipulate data.

• They can hold different types of values such as numbers, strings, or boolean.

• Examples: int age = 25; String name = 'John'; boolean isStudent = true;

Phishing is a type of cyber attack where attackers impersonate legitimate organizations to trick individuals into providing sensitive information.

• Phishing emails often contain links to fake websites that mimic real ones

• Attackers may use social engineering tactics to manipulate victims into revealing personal information

• Common targets of phishing attacks include usernames, passwords, and financial information

• Examples of phishing attacks include emails claiming to be from banks...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.

• Example: A method 'draw()' can be implemented differently in various classes that inher...read more

Hackers can be categorized into different types based on their intentions and methods.

• White hat hackers - ethical hackers who help organizations by finding security vulnerabilities

• Black hat hackers - malicious hackers who exploit vulnerabilities for personal gain

• Grey hat hackers - a mix of white and black hat hackers, may break laws but not for malicious purposes

• Script kiddies - inexperienced hackers who use pre-written scripts and tools

• Hacktivists - hackers who hack for poli...read more