Explanation

 When a computer application is running, it is in the user mode.

Some examples are word application, PowerPoint, reading a PDF file and browsing the internet.

These are application programs so the computer is in user mode.

Explanation

A compiler is a special program that translates a programming language's source code into machine code, bytecode or another programming language.

Explanation

 Some functions of the presentation layer include character-code translation, data conversion, data encryption and decryption, and data translation.

It connects the application layer with the layers below converting the human readable text and media to machine readable format and vice-versa.

Explanation

An integer  that can be positive, negative, or zero.

Explanation

Database replication is the frequent electronic copying of data from a database in one computer or server to a database in another -- so that all users share the same level of information.

Explanation

A friend function can access the private and protected data of a class.

Explanation

A transaction log is a history of actions executed by a "Database Management System" (DBMS) to guarantee "ACID" properties over crashes or hardware failures.

Physically, a log is a file listing changes to the database, stored in a stable storage format.

Explanation

The relational database environment has all of the following components except separate files.

A relational database is a set of formally described tables from which data can be accessed or reassembled in many different ways without having to reorganize the database tables.

Explanation

In the Internet Protocol stack (also known as the OSI model), the fifth layer is the Session Layer.

When data is sent from device A to device B, the Session Layer at device B is responsible for managing and controlling the connections between the two devices,

ensuring that the data exchange occurs correctly and efficiently.

Explanation

Hypertext Transfer Protocol Secure is an extension of the Hypertext Transfer Protocol.

It is used for secure communication over a computer network, and is widely used on the Internet.

In HTTPS, the communication protocol is encrypted using Transport Layer Security or, formerly, Secure Sockets Layer.