WGU D686 OPERATING SYSTEMS FOR
COMPUTER SCIENTISTS EXAM SCRIPT
VERIFIED QUESTIONS WITH ACCURATE
ANSWERS
●● Uses of Mainframe as a computing environment
Answer: Supports a high volume of data processing and the management
of a large amount of storage.
●● Uses of Server as a computing environment
Answer: In general, any computer, no matter the size, that provides
resources to other computers.
●● Uses of Embedded Systems as a computing environment
Answer: -Most prevalent
-Real Time
-Primitive
-Works within time constraints
-Could have an OS or not
●● Role of operating system
,Answer: The operating system (OS) is the software that runs on the bare
hardware of a computer and provides essential support for users to
develop and use applications in the most efficient and safe manner.
●● Firmware
Answer: Storage that is infrequently written to and is nonvolatile. Also
Software stored in ROM or EEPROM for booting the system and
managing low level hardware.
●● Flash Memory
Answer: Non-volatile memory that can be read from and written to. It is
suitable for secondary storage.
●● Cache Memory
Answer: A type of memory used to temporarily store frequently used
data or programs for quick access; similar to RAM but faster.
●● Dynamic Random Access Memory (DRAM)
Answer: The common version of RAM, which features high read and
write speeds.
●● read-only memory (ROM)
Answer: It's a type of computer storage containing non-volatile,
permanent data that, normally, can only be read, not written to.
,●● System Service
Answer: The additional functionality provided by a program that has
been incorporated into and started as part of the operating system.
●● Error detection service
Answer: Determines if a problem has occurred — for example a bit in
DRAM spontaneously changed from a 0 to a 1, the contents of a
network packet changed during transmission, or a block of data changed
between when it was written and when it was read.
●● Deadlock Detection
Answer: A set of methods intended to ensure that at least one of the
necessary conditions for deadlock cannot hold.
●● Graphical User Interface (GUI)
Answer: A visual display on a computer's screen that allows you to
interact with your computer more easily by clicking graphical elements.
●● Command Line Interface
Answer: a user types commands represented by short keywords or
abbreviations or presses special keys on the keyboard to enter data and
instructions
, ●● dir command
Answer: Command typed in a Command Prompt window to list the
directory contents.
●● wc command
Answer: counts lines , words and characters in a file. it can use " -l , -w
or -c " to displaay only lines , characters , or words
●● copy command
Answer: Command in the command line interface for making a copy of
a file and pasting it in another location.
●● del command
Answer: The DEL command is used to delete files and directories at the
command line.
●● Denial of service attack
Answer: How: Overload of system
Effects: Legitimate users can't access systems
●● What is a thread?
Answer: A thread is a lightweight subprocess.It is a separate path of
execution.It is called separate path of execution because each thread runs
in a separate stack frame.
COMPUTER SCIENTISTS EXAM SCRIPT
VERIFIED QUESTIONS WITH ACCURATE
ANSWERS
●● Uses of Mainframe as a computing environment
Answer: Supports a high volume of data processing and the management
of a large amount of storage.
●● Uses of Server as a computing environment
Answer: In general, any computer, no matter the size, that provides
resources to other computers.
●● Uses of Embedded Systems as a computing environment
Answer: -Most prevalent
-Real Time
-Primitive
-Works within time constraints
-Could have an OS or not
●● Role of operating system
,Answer: The operating system (OS) is the software that runs on the bare
hardware of a computer and provides essential support for users to
develop and use applications in the most efficient and safe manner.
●● Firmware
Answer: Storage that is infrequently written to and is nonvolatile. Also
Software stored in ROM or EEPROM for booting the system and
managing low level hardware.
●● Flash Memory
Answer: Non-volatile memory that can be read from and written to. It is
suitable for secondary storage.
●● Cache Memory
Answer: A type of memory used to temporarily store frequently used
data or programs for quick access; similar to RAM but faster.
●● Dynamic Random Access Memory (DRAM)
Answer: The common version of RAM, which features high read and
write speeds.
●● read-only memory (ROM)
Answer: It's a type of computer storage containing non-volatile,
permanent data that, normally, can only be read, not written to.
,●● System Service
Answer: The additional functionality provided by a program that has
been incorporated into and started as part of the operating system.
●● Error detection service
Answer: Determines if a problem has occurred — for example a bit in
DRAM spontaneously changed from a 0 to a 1, the contents of a
network packet changed during transmission, or a block of data changed
between when it was written and when it was read.
●● Deadlock Detection
Answer: A set of methods intended to ensure that at least one of the
necessary conditions for deadlock cannot hold.
●● Graphical User Interface (GUI)
Answer: A visual display on a computer's screen that allows you to
interact with your computer more easily by clicking graphical elements.
●● Command Line Interface
Answer: a user types commands represented by short keywords or
abbreviations or presses special keys on the keyboard to enter data and
instructions
, ●● dir command
Answer: Command typed in a Command Prompt window to list the
directory contents.
●● wc command
Answer: counts lines , words and characters in a file. it can use " -l , -w
or -c " to displaay only lines , characters , or words
●● copy command
Answer: Command in the command line interface for making a copy of
a file and pasting it in another location.
●● del command
Answer: The DEL command is used to delete files and directories at the
command line.
●● Denial of service attack
Answer: How: Overload of system
Effects: Legitimate users can't access systems
●● What is a thread?
Answer: A thread is a lightweight subprocess.It is a separate path of
execution.It is called separate path of execution because each thread runs
in a separate stack frame.
