D686 Operating Systems exam
QUESTIONS AND VERIFIED
CORRECT ANSWERS
GRADED A+ LATEST 100%
GUARANTEED PASS
device driver - CORRECT ANSWER-software that helps the operating system talk to and control
hardware like printers or keyboards
interrupt - CORRECT ANSWER-a signal from a device telling the computer's brain (the CPU) that
something important needs attention right away
interrupt vector - CORRECT ANSWER-a list that shows where the computer should go to handle
different kinds of interruptions
interrupt-request line - CORRECT ANSWER-a wire or circuit that lets devices send signals to the
CPU to ask for attention
interrupt-handler routine - CORRECT ANSWER-a special program that the computer runs when
it gets an interrupt signal
interrupt-controller hardware - CORRECT ANSWER-parts of the computer that manage when
and how interrupts are handled
nonmaskable interrupt - CORRECT ANSWER-an urgent signal that the CPU must deal with
immediately, like a major error
,maskable - CORRECT ANSWER-describes an interrupt that the CPU can choose to ignore briefly,
usually when it's busy doing something very important
interrupt chaining - CORRECT ANSWER-a method where the computer checks a list of programs
to find the right one to handle the interrupt
interrupt priority level - CORRECT ANSWER-a way of deciding which interrupts are most urgent,
so that the computer can handle them in the right order
random-access memory (RAM) - CORRECT ANSWER-a computer's main memory that can be
used quickly to run programs
dynamic random-access memory (DRAM) - CORRECT ANSWER-a type of RAM that is fast and
used a lot in computers
volatile - CORRECT ANSWER-describes memory that loses its information when the computer
turns off
electrically erasable programmable read-only memory (EEPROM) - CORRECT ANSWER-a type of
nonvolatile memory that can be electrically erased and reprogrammed to store data
bootstrap program - CORRECT ANSWER-the first program that starts a computer by getting
everything ready for the main software to run when the computer is turned on
bit - CORRECT ANSWER-the smallest unit of data storage containing one of two values, 0 (off) or
1 (on)
byte - CORRECT ANSWER-8 bits
, word - CORRECT ANSWER-a unit of data representing multiple bytes, such as 4 bytes in a 32-bit
system or 8 bytes in a 64-bit system
hard disk drive (HDD) - CORRECT ANSWER-a storage device that uses spinning disks and
read/write heads to store and retrieve data
nonvolatile memory (NVM) - CORRECT ANSWER-memory that retains data even when power is
turned off
nonvolatile storage (NVS) - CORRECT ANSWER-storage that keeps data without needing power,
such as hard drives and SSDs
solid state drive (SSD) - CORRECT ANSWER-a storage device that uses flash memory to store
data with no moving parts
big data - CORRECT ANSWER-extremely large sets of data; distributed systems are well suited to
working with big data
MapReduce - CORRECT ANSWER-a Google-created big data programming modal and
implementation for parallel processing across nodes in a distributed cluster. a layer on top of
the Google file system (GFS), it allows developers to carry out large-scale parallel computations
easily
system daemon - CORRECT ANSWER-a service that is provided outside the kernel by stem
programs that are loaded into memory at boot time and run continuously
trap - CORRECT ANSWER-a software interrupt. the interrupt can be caused either by an error
(e.g., division by zero or invalid memory access) or by a specific request from a user program
that an operating-system service be performed
QUESTIONS AND VERIFIED
CORRECT ANSWERS
GRADED A+ LATEST 100%
GUARANTEED PASS
device driver - CORRECT ANSWER-software that helps the operating system talk to and control
hardware like printers or keyboards
interrupt - CORRECT ANSWER-a signal from a device telling the computer's brain (the CPU) that
something important needs attention right away
interrupt vector - CORRECT ANSWER-a list that shows where the computer should go to handle
different kinds of interruptions
interrupt-request line - CORRECT ANSWER-a wire or circuit that lets devices send signals to the
CPU to ask for attention
interrupt-handler routine - CORRECT ANSWER-a special program that the computer runs when
it gets an interrupt signal
interrupt-controller hardware - CORRECT ANSWER-parts of the computer that manage when
and how interrupts are handled
nonmaskable interrupt - CORRECT ANSWER-an urgent signal that the CPU must deal with
immediately, like a major error
,maskable - CORRECT ANSWER-describes an interrupt that the CPU can choose to ignore briefly,
usually when it's busy doing something very important
interrupt chaining - CORRECT ANSWER-a method where the computer checks a list of programs
to find the right one to handle the interrupt
interrupt priority level - CORRECT ANSWER-a way of deciding which interrupts are most urgent,
so that the computer can handle them in the right order
random-access memory (RAM) - CORRECT ANSWER-a computer's main memory that can be
used quickly to run programs
dynamic random-access memory (DRAM) - CORRECT ANSWER-a type of RAM that is fast and
used a lot in computers
volatile - CORRECT ANSWER-describes memory that loses its information when the computer
turns off
electrically erasable programmable read-only memory (EEPROM) - CORRECT ANSWER-a type of
nonvolatile memory that can be electrically erased and reprogrammed to store data
bootstrap program - CORRECT ANSWER-the first program that starts a computer by getting
everything ready for the main software to run when the computer is turned on
bit - CORRECT ANSWER-the smallest unit of data storage containing one of two values, 0 (off) or
1 (on)
byte - CORRECT ANSWER-8 bits
, word - CORRECT ANSWER-a unit of data representing multiple bytes, such as 4 bytes in a 32-bit
system or 8 bytes in a 64-bit system
hard disk drive (HDD) - CORRECT ANSWER-a storage device that uses spinning disks and
read/write heads to store and retrieve data
nonvolatile memory (NVM) - CORRECT ANSWER-memory that retains data even when power is
turned off
nonvolatile storage (NVS) - CORRECT ANSWER-storage that keeps data without needing power,
such as hard drives and SSDs
solid state drive (SSD) - CORRECT ANSWER-a storage device that uses flash memory to store
data with no moving parts
big data - CORRECT ANSWER-extremely large sets of data; distributed systems are well suited to
working with big data
MapReduce - CORRECT ANSWER-a Google-created big data programming modal and
implementation for parallel processing across nodes in a distributed cluster. a layer on top of
the Google file system (GFS), it allows developers to carry out large-scale parallel computations
easily
system daemon - CORRECT ANSWER-a service that is provided outside the kernel by stem
programs that are loaded into memory at boot time and run continuously
trap - CORRECT ANSWER-a software interrupt. the interrupt can be caused either by an error
(e.g., division by zero or invalid memory access) or by a specific request from a user program
that an operating-system service be performed
