Computer (Physics) (Part-5)

Total Questions: 50

41. Which of the following statement is true? [S.S.C. Online Graduation Level (T-I) 10.09.2016 (Shift-II)]

Correct Answer: (a) A Primary key is also a candidate key.
Solution:A Primary Key is also a candidate key in relation databases.

The primary key can be a column or a collection of columns that uniquely identify the record.

Relational database is a system of establishing relationships between databases used by different types of software systems.

42. Which algorithm is used to decide the path to transfer the packets from source to destination? [S.S.C. Online Graduation Level (T-I) 31.08.2016 (Shift-III)]

Correct Answer: (a) Routing
Solution:Path directions are called routing in English.
  • The word "Routing is derived from 'Route which means-Path".
  • The 'route' algorithm is used to decide the path to transfer packets from the source point to the destination.
  • The router searches its routing table to determine the best path to transfer the packets.
  • Through this search, the packets have to be matched with its destination IP address.

43. Files left in the Recycle Bin are permanently deleted when_____ . [S.S.C. Online MTS (T-I) 10.10.2017(Shift-II)]

Correct Answer: (b) it is emptied manually
Solution:The Recycle Bin is a system folder in which Windows stores items that users delete.
Files left in the Recycle Bin are permanently deleted when they are emptied manually.

44. A/an________is the smallest illuminated area on a computer screen. [S.S.C. JE Mechanical Exam 22.03.2021 (Shift-II)]

Correct Answer: (d) Pixel
Solution:A pixel is the smallest unit of a digital image or graphic that can be displayed and represented on a digital display device.
  • A pixel is the basic logical unit in digital graphics.
  • Pixels are combined to form a complete image, video, text, or any visible thing on a computer display.
  • A pixel is also known as a picture element (pix picture, el = element).

45. Constantly running system-program processes are known as- [S.S.C. Online Graduation Level (T-I) 10.09.2016 (Shift-III)]

Correct Answer: (a) Daemons
Solution:

Constantly running system-program processes are known as daemons (in Unix-like operating systems) or services (in Windows operating systems).

These background processes typically start when the operating system boots up and continue to run in the background, performing essential tasks without direct user interaction.

They often listen for specific events or requests and respond accordingly.

46. A_______is a vertical blinking line in a text editor that indicates the place where anything that is typed will appear. [S.S.C. JE CNL Exam 23.03.2021 (Shift-I)]

Correct Answer: (c) Cursor
Solution:

A cursor (or sometimes called an insertion point) is the vertical blinking line in a text editor that indicates the place where anything that is typed will appear.

  • It essentially shows you your current position within the text document.
  • As you type, the cursor moves to the right, indicating where the next character will be inserted.
  • You can also move the cursor around the document using the arrow keys, the mouse, or other navigation commands.

47. The Unix operating system was developed by_______in the 1970s. [S.S.C. Online CHSL (T-I) 21.01.2017 (Shift-II)]

Correct Answer: (d) Bell Labs
Solution:UNIX is a powerful Operating System initially developed by Ken Thompson, Dennis Ritchie at AT&T Bell laboratories in 1970.

It is prevalent among scientific, engineering, and academic institutions due to its most appreciative features like multitasking, flexibility, and many more.

In UNIX, the file system is a hierarchical structure of files and directories where users can store and retrieve information using the files.

48. A series of instructions written by a programmer according to a given set of rules or conventions is called ______ . [S.S.C. Online CHSL (T-I) 3.02.2017 (Shift-II)]

Correct Answer: (a) Syntax
Solution:A series of instructions written by a programmer according to a given set of rules or conventions is called Syntax.

Syntax in computer programming means the rules that control the structure of the symbols, punctuation, and words of a programming language.

49. What is a memory buffer used to accommodate a speed differential? [S.S.C. Online Graduation Level (T-I) 28.08.2016 (Shift-III)]

Correct Answer: (a) Cache
Solution:A memory buffer used to accommodate a speed differential is called a cache.
Caches are
  • small,
  • high-speed memory units

placed between the CPU and main memory. They store frequently accessed data, allowing the CPU to retrieve information quickly without needing to access the slower main memory.

50. Which of the following ports is used to connect a computer to a wired network? [S.S.C. Online CHSL (T-I) 10.08.2021 (Shift-III)]

Correct Answer: (b) Ethernet port
Solution:An Ethernet port (also called a jack or socket) is an opening on computer network equipment that Ethernet cables plug into.

They aim to connect wired network hardware in an Ethernet LAN, metropolitan area network (MAN), or wide area network (WAN).