Computer Operator Questions and Answers SET - 3 | MCQs | PSC

Computer Operator Model Question Set - 3

1. Multimedia system require hard real time scheduling

a. To ensure critical tasks will be serviced within timing deadline

b. To deliver the media file to the client

c. To minimize the delay

d. For security

Correct Answer: a. To ensure critical tasks will be serviced within timing deadline
Explanation: Hard real-time scheduling ensures that critical tasks, such as multimedia processing, meet strict timing deadlines to maintain performance and quality.

2. Process is

a. Program in high level language kept on disk

b. Contents of main memory

c. A program in execution

d. A job in secondary memory

Correct Answer: c. A program in execution
Explanation: A process is a program that is currently executing, including its code, data, and state in memory.

3. Virtual memory is normally implemented by

a. Demand paging

b. Buses

c. Virtualization

d. All of these

Correct Answer: a. Demand paging
Explanation: Virtual memory is typically implemented using demand paging, which loads pages into memory only when needed, optimizing memory usage.

4. DHCP stands for

a. Dynamic Host Control Protocol

b. Dynamic Host Configuration Protocol

c. Different Host Control Protocol

d. Dynamic Host Configuration Procedure

Correct Answer: b. Dynamic Host Configuration Protocol
Explanation: DHCP (Dynamic Host Configuration Protocol) automatically assigns IP addresses and network configuration to devices on a network.

5. A __ is a device that forwards packets between networks by processing the routing information included in the packet.

a. Bridge

b. Firewall

c. Router

d. Switch

Correct Answer: c. Router
Explanation: A router forwards packets between networks by analyzing routing information, directing data to the appropriate destination.

6. __ is the physical path over which a message travels

a. Path

b. Medium

c. Protocol

d. Route

Correct Answer: b. Medium
Explanation: The medium is the physical path (e.g., cables, wireless signals) through which data travels in a network.

7. __ is executed to request a new IP address

a. ipconfig/renew

b. ipconfig/release

c. ipconfig/revive

d. ipconfig/request

Correct Answer: a. ipconfig/renew
Explanation: The command `ipconfig/renew` requests a new IP address from a DHCP server in Windows.

8. Communication channel is shared by all the machines on the network in

a. broadcast network

b. unicast network

c. multicast network

d. None of the above

Correct Answer: a. broadcast network
Explanation: In a broadcast network, the communication channel is shared by all devices, and messages are sent to all machines.

9. Protocol Data Unit (PDU) of TCP is known as

a. Message

b. Segment

c. Datagram

d. Frame

Correct Answer: b. Segment
Explanation: The PDU for TCP is called a segment, which contains a header and payload for reliable data transmission.

10. What function key is used hyperlink facility?

a. Ctrl+C

b. Ctrl+K

c. Ctrl+L

d. Ctrl+{

Correct Answer: b. Ctrl+K
Explanation: Ctrl+K is commonly used in applications like MS Word to open the hyperlink insertion dialog.

11. Feature that enables several people to work to create and update a document

a. Document sharing

b. Document locking

c. Document Collaboration

d. Document Protection

Correct Answer: c. Document Collaboration
Explanation: Document collaboration allows multiple users to work together on creating and updating a document in real-time.

12. You can break the column by pressing

a. Ctrl+Shift+Enter

b. Ctrl+Enter

c. Shift+Enter

d. Alt+Enter

Correct Answer: b. Ctrl+Enter
Explanation: In MS Word, Ctrl+Enter inserts a column break, moving the content to the next column.

13. The shortcut to copy format is:

a. CTRL+SHIFT+C

b. ALT+CTRL+C

c. ALT+SHIFT+C

d. None of the above

Correct Answer: a. CTRL+SHIFT+C
Explanation: Ctrl+Shift+C is used in MS Office applications to copy the formatting of selected text or objects.

14. Which of the following is NOT a valid page margin

a. Mirrored

b. Narrow

c. English

d. Wide

Correct Answer: c. English
Explanation: MS Word offers margin settings like Mirrored, Narrow, and Wide, but "English" is not a valid margin type.

15. What function displays row data in a column or column data in a row?

a. Hyperlink

b. Index

c. Transpose

d. Rows

Correct Answer: c. Transpose
Explanation: The Transpose function in Excel swaps row data to columns or vice versa.

16. Each excel file is called a workbook because

a. It can contain text and data

b. It can be modified

c. It can contain many sheets including worksheets and chart sheets

d. You have to work hard to create it

Correct Answer: c. It can contain many sheets including worksheets and chart sheets
Explanation: An Excel workbook is a file that can include multiple worksheets and chart sheets for organizing data.

17. A typical spreadsheet software allows at least

a. 64 columns

b. 128 columns

c. 256 columns

d. 512 columns

Correct Answer: c. 256 columns
Explanation: Modern spreadsheet software like Excel supports at least 256 columns, though newer versions support more.

18. Which of the following methods cannot be used to edit the content of cell?

a. Pressing the Alt Key

b. Clicking the formula bar

c. Pressing F2

d. Double clicking the cell

Correct Answer: a. Pressing the Alt Key
Explanation: Pressing Alt does not directly edit cell content, while the other methods (F2, formula bar, double-click) do.

19. How should you print a selected area of a worksheet, if you'll want to print a different area next time?

a. On the file menu, point to print, and then click selection under print what

b. On the file menu, click print, and then click add

c. On the view menu, click custom views, then click add

d. All of the above

Correct Answer: a. On the file menu, point to print, and then click selection under print what
Explanation: Selecting "Print Selection" in Excel allows printing only the highlighted area, which can vary each time.

20. In MS Power Point, ___ is readymade styles that can be used to enter Speaker Comments?

a. Auto style

b. Template

c. Wizard

d. Preformatting

Correct Answer: b. Template
Explanation: Templates in PowerPoint provide predefined styles, including layouts for speaker notes.

21. Which view in Power Point page can be used to enter Speaker Comments?

a. Notes page view

b. Slide sorter

c. Normal

d. Slide show

Correct Answer: a. Notes page view
Explanation: Notes Page view in PowerPoint is designed for adding and editing speaker comments for each slide.

22. The values GET, POST, HEAD etc are specified in ___ of HTTP message.

a. Request line

b. Header line

c. Status line

d. Entity body

Correct Answer: a. Request line
Explanation: HTTP methods like GET, POST, and HEAD are specified in the request line of an HTTP message.

23. A web cookie is a small piece of data in user’s web browser while the user is browsing a website

a. Sent from a website and stored in the server while a user is browsing a website

b. Sent from user and stored in the server while a user is browsing

c. Sent from root server to all servers

d. None of the mentioned

Correct Answer: d. None of the mentioned
Explanation: A web cookie is sent from a website and stored in the user’s browser, not the server, to track user activity.

24. How can you make a bulleted list?

a. <list>

b. <nl>

c. <ul>

d. <ol>

Correct Answer: c. <ul>
Explanation: The <ul> tag in HTML creates an unordered (bulleted) list.

25. Text within <EM> … </EM> tag displays text in ___ format.

a. bold

b. italic

c. list

d. indented

Correct Answer: b. italic
Explanation: The <em> tag in HTML emphasizes text, typically rendering it in italic format.

26. Software that defines a database, stores the data, supports a query language, produces reports and creates data entry screens is a

a. Data dictionary

b. Database management system (DBMS)

c. Decision support system

d. Relational database

Correct Answer: b. Database management system (DBMS)
Explanation: A DBMS manages databases, supporting data storage, queries, reports, and data entry interfaces.

27. When building database, the data dealing with an entity is modeled as a:

a. attribute

b. class

c. object

d. table

Correct Answer: d. table
Explanation: In a relational database, entities are modeled as tables, with attributes as columns.

28. Student and course enrolled is an example of

a. One-to-one relationship

b. One-to-many relationship

c. Many-to-one relationship

d. Many-to-many relationship

Correct Answer: d. Many-to-many relationship
Explanation: A student can enroll in multiple courses, and a course can have multiple students, forming a many-to-many relationship.

29. Given the following relation Student (roll no, name, course no, max. marks, year of study, address). The corresponding 3NF relations are

a. Student (roll no, name, year of study, address), Course (course no, course max. marks)

b. Student (roll no, name, year of study, address), Studies (roll no, course no), Course (course no, course max. marks)

c. Student (roll no, name, address, marks), Year (roll no, year of study), Course (course no, course max. marks)

d. None of the above

Correct Answer: b. Student (roll no, name, year of study, address), Studies (roll no, course no), Course (course no, course max. marks)
Explanation: To achieve 3NF, the relation is decomposed into Student (roll no, name, year of study, address), Studies (roll no, course no) for the many-to-many relationship, and Course (course no, course max. marks) to store course details.

30. Which of the following term describes testing?

a. Finding broken code

b. Evaluating deliverable to find errors

c. Stage of all projects

d. None of the above

Correct Answer: b. Evaluating deliverable to find errors
Explanation: Testing involves evaluating software deliverables to identify errors and ensure they meet requirements.

31. Which of the following manuals is not a user documentation?

a. Beginner’s Guide

b. Installation guide

c. Reference Guide

d. SRS

Correct Answer: d. SRS
Explanation: SRS (Software Requirements Specification) is a technical document for developers, not user documentation like guides.

32. Data flow diagram is related to

a. Data design

b. Process design

c. UI design

d. Database schema

Correct Answer: b. Process design
Explanation: Data flow diagrams (DFDs) model the flow of data in a system, focusing on process design.

33. Digital signature issued by

a. Controller

b. Certifying Authority

c. Subscriber

d. Department of Information Technology

Correct Answer: b. Certifying Authority
Explanation: A Certifying Authority (CA) issues digital signatures to verify the authenticity of users or entities.

34. For digital signature key pair is generated by

a. Asymmetric crypto system

b. Symmetric crypto system

c. RSA

d. None of the above

Correct Answer: a. Asymmetric crypto system
Explanation: Digital signatures use asymmetric cryptography, with a public-private key pair for signing and verification.

35. License of certifying authority is issued by

a. Nepal Government

b. Controller

c. Department of IT

d. Ministry of Science and Technology

Correct Answer: b. Controller
Explanation: The Controller of Certifying Authorities issues licenses to CAs in many jurisdictions, including Nepal.

36. An area of a computer that temporarily holds waiting to be processed is……

a. CPU

b. Memory

c. Storage

d. File

Correct Answer: b. Memory
Explanation: Memory (RAM) temporarily holds data and instructions waiting to be processed by the CPU.

37. Hard disk can be used as……

a. Input device

b. Output device

c. Storage device

d. All of the above

Correct Answer: c. Storage device
Explanation: A hard disk is used for long-term storage of data and programs.

38. Unicode standard is……

a. Software

b. Font

c. Character encoding system

d. Keyboard layout

Correct Answer: c. Character encoding system
Explanation: Unicode is a standard for encoding characters from various languages and symbols.

39. A fault in a computer program which prevents it from working correctly is known as

a. Boot

b. Bug

c. Biff

d. Strap

Correct Answer: b. Bug
Explanation: A bug is an error or fault in a program that causes it to malfunction.

40. The difference between people with access to computers and the internet and those without this access is known as the:

a. Digital divide

b. Internet divide

c. Web divide

d. E-illiteracy

Correct Answer: a. Digital divide
Explanation: The digital divide refers to the gap between those with and without access to digital technology.

41. Cache memory……

a. Helps to store more data in hard disk

b. Placed between main memory and microprocessor

c. Stores data permanently

d. Holds last time visited web site only

Correct Answer: b. Placed between main memory and microprocessor
Explanation: Cache memory is a high-speed memory located between the CPU and main memory to speed up data access.

42. Which one of the following printers is suitable for printing sprocket fed carbon copies?

a. Laser

b. Dot matrix

c. Ink-jet

d. Drum

Correct Answer: b. Dot matrix
Explanation: Dot matrix printers are suitable for printing on sprocket-fed carbon copies due to their impact printing mechanism.

43. HDMI stands for

a. High Definition Machine Interface

b. High Definition Machine Interconnection

c. High Definition Multimedia Interface

d. High Definition Manual Interface

Correct Answer: c. High Definition Multimedia Interface
Explanation: HDMI (High Definition Multimedia Interface) transmits high-quality audio and video signals.

44. When a RJ 45 jack is clamped with UTP 4-pair cable, it is understood that following PIN are responsible for reception and transmission

a. 1, 2, 3, 4

b. 1, 2, 3, 6

c. 1, 2, 7, 8

d. 5, 6, 7, 8

Correct Answer: b. 1, 2, 3, 6
Explanation: In a T568-B configuration for Ethernet, pins 1, 2 (transmit) and 3, 6 (receive) are used for data transmission.

45. If a computer presentation is required to be displayed in local monitor and LCD projector simultaneously, the setup chosen in windows display setting is

a. Split screen

b. Projector only

c. LCD mode

d. Duplicate screen

Correct Answer: d. Duplicate screen
Explanation: Duplicate screen in Windows display settings mirrors the content on both the monitor and projector.

46. What command can be used to find out network route/path for internet connection troubleshooting?

a. tracert

b. ping

c. nslookup

d. net use

Correct Answer: a. tracert
Explanation: The `tracert` command traces the route packets take to a network destination, aiding in troubleshooting.

47. Computer not booting at all, beeping endlessly is a symptom of

a. BAD RAM

b. BAD Network Card

c. Network layer

d. Data Link layer

Correct Answer: a. BAD RAM
Explanation: Endless beeping during boot typically indicates a RAM issue, as detected by the system’s POST.

48. Bridge works in which layer of OSI model?

a. Application layer

b. Transport layer

c. Network layer

d. Data Link layer

Correct Answer: d. Data Link layer
Explanation: A bridge operates at the Data Link layer (Layer 2) of the OSI model, connecting network segments based on MAC addresses.

49. Unix operating system is an

a. Multi user operating system

b. Time sharing operating system

c. Multi tasking operating system

d. All of the above

Correct Answer: d. All of the above
Explanation: Unix is a multi-user, time-sharing, and multitasking operating system, supporting multiple users and processes simultaneously.

50. In which type of operating system, the response time is very crucial?

a. Network operating system

b. Real time operating system

c. Batch operating system

d. Unix operating system

Correct Answer: b. Real time operating system
Explanation: Real-time operating systems prioritize low response times for time-critical applications, such as embedded systems.