IT &computer MCQ section 7 MCQ Questions & Answers Detailed Explanation

Answer: (a)

ODBC : Open Database Connectivity

Answer: (b)

LOGO is a computer programming language used for functional programming, and is used for generating basic shapes using a turtle cursor. It was developed for children experimenting their first programming steps. It guides kids step by step with the basics of computers programming.

Answer: (b)

Primary Key is a column or a combination of columns that uniquely identify a record. Only one Candidate Key can be Primary Key. For a Candidate Key to qualify as a Primary Key, it should be unique and non-null. So, basically a primary key is just one of the candidate keys, which is a just a minimal super key.

Answer: (c)

A personal computer (PC) is a digital computer designed for use by only one person at a time. A typical personal computer assemblage consists of a central processing unit (CPU) two types of computer memory and various input/output devices, including a display screen, keyboard and mouse, modem, and printer.

Answer: (c)

An optical disc is an electronic data storage medium that can be written to and read using a low-powered laser beam. Super disk is an optical disk.

Answer: (c)

The Compact Disc, or CD for short, is an optical disc used to store digital data. It was originally developed to store and playback sound recordings only, but the format was later adapted for the storage of data (CD-ROM). Standard CDs have a diameter of 12 mm (4.7 in) and can hold up to 80 minutes of uncompressed audio or 700 MB (700 × 106 bytes) of data.

The encoding material sits atop a thicker substrate (usual polycarbonate) which makes up the bulk of the disc and forms a dust defocusing layer. The encoding pattern follows a continuous, spiral path covering the entire disc surface and extending from the innermost track to the outermost track.

The data is stored on the disc with a laser or stamping machine.