Computer Knowledge

Operating Systems

1,344 Questions

Test your computer knowledge with these questions on operating systems. The content covers various platforms including Unix, Linux, Windows, Android, and Macintosh. These questions are commonly asked in the computer knowledge sections of banking and government exams.

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Operating Systems Questions

Multiple choice technology mainframe

What is this and how can it be executed?

  1. It's a JCL procedure and cannot be executed

  2. It's a job and may be submitted with a SUBMIT command.

  3. It's a JCL procedure and can be executed with a submit command.

  4. It's a JCL procedure and must be invoked in a job with an EXEC statement.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Like the previous JCL procedure question, a PROC is not a standalone executable job and cannot be run with a submit command. It must be invoked using an EXEC statement inside a JCL job stream. Therefore, option 556575 is correct.

Multiple choice technology mainframe

What is this and how can it be executed?

  1. It's a JCL procedure and cannot be executed.

  2. It's a job and may be submitted with a SUBMIT command.

  3. It's a JCL procedure and can be executed with a submit command.

  4. It's a JCL procedure and must be invoked in a job with an EXEC statement.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The prompt asks 'What is this and how can it be executed?' where 'this' refers to a JCL procedure. JCL procedures (PROCs) cannot be submitted directly as standalone jobs via SUBMIT; they must be called and executed within a job stream using an EXEC statement.

Multiple choice technology mainframe

ISPF uses various function keys. Which of the following describes the mapping of these keys?

  1. Different in every ISPF menu

  2. Determined by operating system

  3. Fixed by ISPF and cannot be changed

  4. May be changed using the ISPF SETTINGS function
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In ISPF, function key (PF key) definitions and mappings are not permanently fixed or determined dynamically by the host OS menu-by-menu. Instead, users can customize these settings to match their preferences using the ISPF SETTINGS panel (or command keys).

Multiple choice technology programming languages

C was given along with which operating system?

  1. DOS

  2. unix

  3. Solaris

  4. Both 1 and 2
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

C was developed by Dennis Ritchie at Bell Labs specifically to rewrite the Unix operating system. Unix and C are historically co-developed, making Unix the operating system with which C was originally distributed. Other operating systems like DOS and Solaris came later or are different branches.

Multiple choice technology operating systems

Which of the following is not an Operating System

  1. Debian

  2. BSD

  3. eCos

  4. VyWorks
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Debian and BSD are well-known operating systems. eCos (Embedded Configurable Operating System) is a real-time embedded OS. 'VyWorks' is a misspelling of VxWorks, which IS an operating system. However, the misspelled version 'VyWorks' doesn't exist as a recognized OS, making it the correct answer to 'which is NOT an operating system'.

Multiple choice technology operating systems

Which of the following are the versions of Microsoft Windows OS?

  1. Windows 7

  2. Windows Me

  3. Windows CT

  4. Windows CE
Reveal answer Fill a bubble to check yourself
A,B,D Correct answer
Explanation

Windows 7 (2009), Windows Me (2000), and Windows CE (1996, embedded systems) are all legitimate Microsoft Windows operating systems. Windows CT is not a real Windows version - it's a fabricated distractor. Windows versions follow consistent naming like 95, 98, XP, Vista, 7, 8, 10, 11.

Multiple choice technology platforms and products

1)What is the latest build of Answers Desktop as on Dec 2009?

  1. V7.3 Build 10

  2. V7.3.1 Build 10

  3. V7.3 Build 6

  4. V7.3.1 Build 6
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is a factual product knowledge question about 'Answers Desktop' build versions as of December 2009. While the claimed answer (V7.3.1 Build 10) may be correct for the specific product context, this is not a testing or software engineering concept question - it's product-specific trivia. The answer is stated as correct (B) but the question tests domain knowledge rather than technical principles.

Multiple choice technology

How do you visualize the content of file "not_empty"?

  1. type not_empty

  2. cat not_empty

  3. more not_empty

  4. vi not_empty
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

To solve this question, the user needs to know the basic command-line interface (CLI) commands and their functionalities in Linux/Unix.

Now, let's go through each option and explain why it is right or wrong:

A. type not_empty: This command is used to display the type of a command, but it does not show the content of a file. Therefore, this option is incorrect.

B. cat not_empty: This command is used to display the contents of a file on the terminal. Hence, this option is correct.

C. more not_empty: This command is also used to display the contents of a file, but it displays one screen of text at a time, and the user has to press the spacebar to see the next screen. Therefore, this option is correct but less efficient than the cat command.

D. vi not_empty: This command is used to open a file in the vi editor, which allows the user to edit the file content. Therefore, this option is incorrect as it does not display the content of the file on the terminal.

Therefore, the correct answer is:

The Answer is: B. cat not_empty

Multiple choice technology

How do you print the first 15 lines of all files ending by ".txt"?

  1. print 15 .txt

  2. cat *.txt -length=15

  3. head -15 *.txt

  4. type 15 .txt
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The head command displays the first N lines of files. 'head -15 *.txt' shows the first 15 lines of all files ending in .txt (the *.txt pattern matches all such filenames). Options B, C, and D use incorrect commands or syntax.

Multiple choice technology operating systems

To restore the active console window

  1. CTRL+F3

  2. CTRL+F4

  3. CTRL+F5

  4. CTRL+F1
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

CTRL+F5 is the Windows shortcut to restore or refresh the active console window in many testing and development environments. The other function key combinations (F1, F3, F4) are typically used for other purposes like help, search, or closing tabs.

Multiple choice technology operating systems

To open the utility manager

  1. CTRL+SHIFT+V

  2. Windowslogo+U

  3. Windowslogo

  4. CTRL+U
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Windows logo key + U (Windowslogo+U) opens the Utility Manager in Windows, which provides access to system accessibility tools like Magnifier, Narrator, and On-Screen Keyboard. This is a standard Windows accessibility shortcut.

Multiple choice technology

What is the command used to Erases the complete line

  1. CTRL+Y

  2. CTRL+U

  3. CTRL+C

  4. CTRL+F
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

CTRL+U is the Unix/command-line shortcut that erases from the cursor to the beginning of the current line. This is a standard readline/emacs-style editing command available in bash and other Unix shells. CTRL+Y typically yanks (pastes) previously deleted text, while CTRL+C and CTRL+F have other purposes.