WGU D686 Sections 1 & 2
exam QUESTIONS AND
VERIFIED CORRECT
ANSWERS GRADED A+
LATEST 100% GUARANTEED
PASS
system program - CORRECT ANSWER-A program associated with the operating system but not
necessarily part of the kernel.
middleware - CORRECT ANSWER-A set of software frameworks that provide additional services
to application developers.
bus - CORRECT ANSWER-A communication system; e.g., within a computer, a bus connects
various components, such as the CPU and I/O devices, allowing them to transfer data and
commands.
device driver - CORRECT ANSWER-An operating system component that provides uniform access
to various devices and manages I/O to those devices.
,interrupt - CORRECT ANSWER-A hardware mechanism that enables a device to notify the CPU
that it needs attention.
interrupt vector - CORRECT ANSWER-An operating-system data structure indexed by interrupt
address and pointing to the interrupt handlers. A kernel memory data structure that holds the
addresses of the interrupt service routines for the various devices.
interrupt-request line - CORRECT ANSWER-The hardware connection to the CPU on which
interrupts are signaled.
interrupt-handler routine - CORRECT ANSWER-An operating system routine that is called when
an interrupt signal is received.
interrupt-controller hardware - CORRECT ANSWER-Computer hardware components for
interrupt management.
nonmaskable interrupt - CORRECT ANSWER-An interrupt that cannot be delayed or blocked
(such as an unrecoverable memory error).
maskable - CORRECT ANSWER-Describes an interrupt that can be delayed or blocked (such as
when the kernel is in a critical section).
interrupt chaining - CORRECT ANSWER-A mechanism by which each element in an interrupt
vector points to the head of a list of interrupt handlers, which are called individually until one is
found to service the interrupt request.
interrupt priority level - CORRECT ANSWER-Prioritization of interrupts to indicate handling
order.
, random-access memory (RAM) - CORRECT ANSWER-Rewritable memory, also called main
memory. Most programs run from RAM, which is managed by the kernel.
dynamic random-access memory (DRAM) - CORRECT ANSWER-The common version of RAM,
which features high read and write speeds.
bootstrap program - CORRECT ANSWER-The program that allows the computer to start running
by initializing hardware and loading the kernel.
volatile - CORRECT ANSWER-Describes storage whose content can be lost in a power outage or
similar event.
firmware - CORRECT ANSWER-Software stored in ROM or EEPROM for booting the system and
managing low level hardware.
bit - CORRECT ANSWER-The basic unit of computer storage. A bit can contain one of two values,
0 or 1.
byte - CORRECT ANSWER-Eight bits.
word - CORRECT ANSWER-A unit made up of one or more bytes.
kilobyte (KB) - CORRECT ANSWER-1,024 bytes.
megabyte (MB) - CORRECT ANSWER-bytes.
gigabyte (GB) - CORRECT ANSWER-bytes.
exam QUESTIONS AND
VERIFIED CORRECT
ANSWERS GRADED A+
LATEST 100% GUARANTEED
PASS
system program - CORRECT ANSWER-A program associated with the operating system but not
necessarily part of the kernel.
middleware - CORRECT ANSWER-A set of software frameworks that provide additional services
to application developers.
bus - CORRECT ANSWER-A communication system; e.g., within a computer, a bus connects
various components, such as the CPU and I/O devices, allowing them to transfer data and
commands.
device driver - CORRECT ANSWER-An operating system component that provides uniform access
to various devices and manages I/O to those devices.
,interrupt - CORRECT ANSWER-A hardware mechanism that enables a device to notify the CPU
that it needs attention.
interrupt vector - CORRECT ANSWER-An operating-system data structure indexed by interrupt
address and pointing to the interrupt handlers. A kernel memory data structure that holds the
addresses of the interrupt service routines for the various devices.
interrupt-request line - CORRECT ANSWER-The hardware connection to the CPU on which
interrupts are signaled.
interrupt-handler routine - CORRECT ANSWER-An operating system routine that is called when
an interrupt signal is received.
interrupt-controller hardware - CORRECT ANSWER-Computer hardware components for
interrupt management.
nonmaskable interrupt - CORRECT ANSWER-An interrupt that cannot be delayed or blocked
(such as an unrecoverable memory error).
maskable - CORRECT ANSWER-Describes an interrupt that can be delayed or blocked (such as
when the kernel is in a critical section).
interrupt chaining - CORRECT ANSWER-A mechanism by which each element in an interrupt
vector points to the head of a list of interrupt handlers, which are called individually until one is
found to service the interrupt request.
interrupt priority level - CORRECT ANSWER-Prioritization of interrupts to indicate handling
order.
, random-access memory (RAM) - CORRECT ANSWER-Rewritable memory, also called main
memory. Most programs run from RAM, which is managed by the kernel.
dynamic random-access memory (DRAM) - CORRECT ANSWER-The common version of RAM,
which features high read and write speeds.
bootstrap program - CORRECT ANSWER-The program that allows the computer to start running
by initializing hardware and loading the kernel.
volatile - CORRECT ANSWER-Describes storage whose content can be lost in a power outage or
similar event.
firmware - CORRECT ANSWER-Software stored in ROM or EEPROM for booting the system and
managing low level hardware.
bit - CORRECT ANSWER-The basic unit of computer storage. A bit can contain one of two values,
0 or 1.
byte - CORRECT ANSWER-Eight bits.
word - CORRECT ANSWER-A unit made up of one or more bytes.
kilobyte (KB) - CORRECT ANSWER-1,024 bytes.
megabyte (MB) - CORRECT ANSWER-bytes.
gigabyte (GB) - CORRECT ANSWER-bytes.
