Friday, March 2, 2012

IT Quiz - 9 (IT Quiz Questions)

1. Which of the following data models are used in describing the data at the logical and view levels?
I. Object based logical models (OBLM).
II. Record based logical models (RBLM).
III. Physical data base model.
[A]Only (I) above
[B]Only (II) above
[C]Only (III) above
[D]Both (I) and (II) above

2. A relational database system needs to maintain data about the relations, such as the schema, the schema of the relations. This information is called
[A]Data dictionary
[B]Data definition
[C]Data planning
[D]Data mining

3. Which of the following layers is responsible for establishing an error-free communications path between computers over the physical channel?
[A]Data link layer
[B]The network layer
[C]The session layer
[D]The presentation layer

4. The difference(s) between PBX (Private Branch Exchange) and Centrex networks is/are
I. In a Centrex network the switching equipment is located in one of the telephone company’s “central exchanges” instead of on the premises of a business.
II. Unlike PBX, a Centrex network incorporates data-over-voice technology for transmissions.
III. A Centrex network consists of large-scale networking systems that enable a business with several offices in the same area whereas a PBX is a telephone multiplexer connecting a large number of in-house telephones to a smaller number of external lines that lead to the service provider’s telephone exchange.
[A]Only (I) above
[B]Only (II) above
[C]Both (I) and (II) above
[D]Both (I) and (III) above

5. Which of the following devices convert digital signals from input/output devices into appropriate frequencies at a transmission terminal and convert them back into digital signals at a recurring terminal?

6. Which of the following is/are process(es) of rapid systems development and testing of working models of new applications through an interactive, iterative process of an evolutionary nature?
I. Prototyping.
II. Rapid Application Design.
III. Process design.
[A]Only (I) above
[B]Only (II) above
[C]Both (I) and (II) above
[D]Both (I) and (III) above

7. Which of the following is not true about an Effective Worksheet in a Spreadsheet program?
[A]Worksheet has a proper title
[B]The worksheet’s purpose has been clearly indicated
[C]Instructions are provided that specifically state how one should type numbers, such as percentages or currencies
[D]Data entry areas are same as calculation and result areas

8. Periodic preparation of data and periodic processing in groups is/are called
I. Batch processing.
II. Online processing.
III. Large scale processing.
[A]Only (I) above
[B]Only (II) above
[C]Both (I) and (II) above
[D]Both (I) and (III) above

9. Which of the following is a performance monitoring system for shop floor operations?
[A]Computer Aided Manufacturing
[B]Computer Aided Design
[C]Computer Aided Engineering
[D]Manufacturing Execution System

10. Which of the following contains a collection of documents inter-linked by hyperlinks over the Internet?
[B]Local Area Network
[C]Metropolitan Area Network
[D]World Wide Web

11. The arrow shaped symbol that is used in a flowchart to designate entry to or exit from a page is called
[A]Terminal symbol
[B]On page connector symbol
[C]Input/Output symbol
[D]Off page connector symbol

12. To reach multiple small groups, Teleconferencing can be done using
I. Television Broadcasting.
II. Closed Circuit Televisions.
III. Open Circuit Televisions.
[A]Only (I) above
[B]Only (II) above
[C]Both (I) and (II) above
[D]Both (II) and (III) above

13. Which of the following is/are the issue(s) of Ethical and Social dimensions of IT?
I. Privacy.
II. Encryption.
III. Accessibility.
[A]Only (I) above
[B]Only (II) above
[C]Both (I) and (II) above
[D]Both (I) and (III) above

14. Which of the following commands in Unix is used to both backup and restore files, to or from tapes or diskettes?

15. Which of the following is not true about an Integer Constant in ‘C’ programming language?
[A]It should have at least one digit
[B]It must not have a decimal point
[C]Commas or blanks are allowed within an Integer Constant
[D]It can be either positive or negative