Operating Systems Online Quiz 1

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| By Mostafiz

Mostafiz

Community Contributor

Quizzes Created: 1 | Total Attempts: 1,479

Questions: 10 | Attempts: 1,479 | Updated: Aug 10, 2023

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Questions and Answers

1.

Before the days of Windows, users interfaced with the operating system through a --- interface.
- A.
  
  Graphical
- B.
  
  Object oriented
- C.
  
  Command utility
- D.
  
  Command line
Correct Answer
A. GrapHical

Explanation
Before the days of Windows, users interfaced with the operating system through a graphical interface. This means that instead of typing commands into a command line, users could interact with the operating system using a visual representation of buttons, menus, and icons. This made it easier for users to navigate and interact with the system, as they could simply click on options instead of memorizing and typing commands.

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2.

The operating system is an example of a computer
- A.
  
  Object
- B.
  
  File system
- C.
  
  Program
- D.
  
  Desktop
Correct Answer
C. Program

Explanation
The operating system is considered a program because it is a set of instructions or code that controls and manages the computer's hardware and software resources. It provides a platform for other programs to run on and facilitates communication between the hardware and software components of the computer system. The operating system is responsible for managing tasks, memory, input/output devices, and file systems, among other things. Therefore, it fits the definition of a program as it performs a specific set of functions to enable the computer to operate.

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3.

Most operating systems are comprised of three main components: the file system, the shell and ?
- A.
  
  Desktop
- B.
  
  Kernel
- C.
  
  User interface
- D.
  
  Code
Correct Answer
B. Kernel

Explanation
The kernel is the correct answer because it is one of the main components of an operating system. It is responsible for managing the system's resources, such as memory and hardware devices, and acts as a bridge between the software and hardware. The kernel also handles tasks such as process management, file system access, and input/output operations.

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4.

CloseHandle() call function in windows operating system is a UNIX's function called for
- A.
  
  Fork()
- B.
  
  Open()
- C.
  
  Read()
- D.
  
  Close()
Correct Answer
D. Close()

Explanation
The given correct answer is close(). The CloseHandle() function in the Windows operating system is used to close an open handle to a file or an input/output (I/O) device. It is not related to any of the mentioned UNIX functions (fork(), open(), read()). The close() function in UNIX is used to close a file descriptor after it is no longer needed. Therefore, the correct answer is close().

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5.

The --- is often used as part of a path.
- A.
  
  Comma
- B.
  
  Forward slash
- C.
  
  Backslash
- D.
  
  Semicolon
Correct Answer
C. Backslash

Explanation
The backslash is often used as part of a path in computer systems. It is commonly used to separate directories or folders within a file path. For example, in a Windows operating system, the backslash is used to separate folders in a file path like C:\Program Files\Example.

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6.

When we execute a C program, CPU runs in ____ mode.
- A.
  
  User
- B.
  
  Kernel
- C.
  
  Supervisory
- D.
  
  System
Correct Answer
A. User

Explanation
When we execute a C program, the CPU runs in user mode. In this mode, the program has limited access to system resources and cannot perform privileged operations. The user mode provides a level of protection and prevents the program from interfering with other processes or the operating system. It ensures that the program only has access to its allocated memory and cannot modify critical system files or configurations.

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7.

For reading input, which of the following system call is used?
- A.
  
  Write
- B.
  
  Rd
- C.
  
  Read
- D.
  
  Change
Correct Answer
A. Write

Explanation
The correct answer is "write" because the write system call is used to write data from a buffer to a file descriptor. It allows the program to send data to an output device or file.

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8.

Which of the following mode is used for opening a file in both reading and writing?
- A.
  
  O_RDONLY
- B.
  
  O_WRONLY
- C.
  
  O_RDWR
- D.
  
  O_WDR
Correct Answer
C. O_RDWR

Explanation
The correct answer is O_RDWR. This mode is used for opening a file in both reading and writing. O_RDONLY is used for opening a file in read-only mode, O_WRONLY is used for opening a file in write-only mode, and O_WDR is not a valid mode for opening a file.

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9.

Getting device attributes of a computer system is a
- A.
  
  Process control
- B.
  
  File management
- C.
  
  Device management
- D.
  
  Information maintenance
Correct Answer
D. Information maintenance

Explanation
The correct answer is "information maintenance" because getting device attributes of a computer system involves collecting and managing information about the devices connected to the system. This process includes gathering details such as device type, status, configuration, and capabilities, which are essential for maintaining and updating the system's information database. It does not involve controlling processes, managing files, or directly managing the devices themselves.

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10.

Programs of the operating system usually end
- A.
  
  Normally
- B.
  
  Interruptedly
- C.
  
  Intervally
- D.
  
  Erroneously
Correct Answer
A. Normally

Explanation
Programs of the operating system usually end "normally" means that they terminate without any errors or issues. This implies that the program has completed its execution successfully and has followed the expected flow of execution.

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Current Version
Aug 10, 2023

Quiz Edited by
ProProfs Editorial Team
Aug 08, 2020

Quiz Created by
Mostafiz

Operating Systems Online Quiz 1

Before the days of Windows, users interfaced with the operating system through a --- interface.

The operating system is an example of a computer

Most operating systems are comprised of three main components: the file system, the shell and ?

CloseHandle() call function in windows operating system is a UNIX's function called for

The --- is often used as part of a path.

When we execute a C program, CPU runs in ____ mode.

For reading input, which of the following system call is used?

Which of the following mode is used for opening a file in both reading and writing?

Getting device attributes of a computer system is a

Programs of the operating system usually end