Computer Awareness Mixed Quiz: Set 44

DigiLocker was launched in 2015 as part of the Digital India programme of the Ministry of Electronics and Information Technology, and it gives every citizen a cloud account linked to Aadhaar in which boards, universities and transport departments place verified certificates that are accepted on a par with the original…

Google Drive, launched in 2012, keeps a user files on Google servers, synchronises them to every signed-in device and opens them in Docs, Sheets and Slides for editing in the browser, which is exactly what cloud storage means.

Abstraction presents only what the user needs, such as the accelerator and brake of a car, and keeps the internal working out of sight; in C++ it is obtained through abstract classes with pure virtual functions and in Java through interfaces and abstract classes.

Simula 67, designed by Ole-Johan Dahl and Kristen Nygaard, introduced the ideas of class, object and inheritance and is therefore treated as the first object-oriented language, from which C++ and Java later borrowed.

MeghRaj is the brand name of the Government of India Cloud, under which the National Informatics Centre runs the National Cloud so that ministries and state departments can host applications and data without buying separate servers for every project.

Infosys was started in 1981 at Pune by N. R. Narayana Murthy together with six colleagues, among them Nandan Nilekani, S. Gopalakrishnan, S. D. Shibulal, K. Dinesh, N. S. Raghavan and Ashok Arora, with a very small amount of borrowed capital.

Bjarne Stroustrup developed the language at Bell Laboratories, starting it as C with Classes and giving it the name C++ in 1983; it adds classes, inheritance and polymorphism to C while keeping C procedural power, which is why it is called a hybrid language.

The Waterfall model is called the linear sequential model because the project flows in one direction through requirement analysis, design, coding, testing, deployment and maintenance, with each phase completed and signed off before the next begins and no overlap between them.

A hybrid cloud joins a private deployment with a public one so that confidential records stay inside the organisation while ordinary or seasonal workloads run on rented public resources, and data can move between the two.

Virtualisation is the technique of running several logical machines on one physical machine and belongs to the chapter on cloud computing, not to the definition of big data.

James Gosling and his team at Sun Microsystems developed Java, which was first called Oak and was released under the name Java in 1995; its programs are compiled to bytecode and run on the Java Virtual Machine, which makes them platform independent.

The Message Digest 5 algorithm takes an input of any length and returns a 128-bit digest.

OneDrive is the cloud storage of Microsoft, built into Windows and into the Microsoft 365 suite; it began life under the name SkyDrive and was renamed OneDrive in 2014 after a trademark dispute.

In the numeric form of chmod each of the three digits stands for one set of users, in the order owner, group and others, and each digit is the sum of read as 4, write as 2 and execute as 1.

Overloading means defining several functions of the same name in the same class with different numbers or types of parameters, so the compiler decides which one to call; because the decision is taken before the program runs, it is called compile-time or static polymorphism.

The correct answer is B, 480 megabits per second, the speed known as high speed in the USB 2.0 specification.

Amazon S3 was launched in 2006 and was among the first large public cloud offerings. It stores data as objects inside containers called buckets rather than as files in folders, and it is used by websites and applications across the world to hold images, backups and logs.

A class only describes the data members and member functions that its objects will have, while an object is created from the class, occupies memory and holds actual values; one class may have any number of objects.

The cloud is reached over a network, so working permanently offline is the opposite of what the model offers; the dependence on connectivity is in fact listed among the limitations of cloud computing.

Inheritance lets a derived, child or sub class take the members of a base, parent or super class and add its own, which is the main route to code reuse in object-oriented programming; its forms are single, multiple, multilevel, hierarchical and hybrid.