©EMILLECT 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED
FIRST PUBLISH OCTOBER 2024
OSG202 Exam Questions and Answers
____ developed the Banker's Algorithm. - ANSWER✔✔-Dijkstra
____ gives users the appearance that their programs are being completely loaded in main -
ANSWER✔✔-Virtual memory
____ include(s) every peripheral unit in the system such as printers, disk drives, CD/DVD drives, flash
memory, keyboards, and so on. - ANSWER✔✔-I/O Devices
____ introduced the need for control cards, which defined the exact nature of each program -
ANSWER✔✔-Job scheduling
____ is a sort of pseudofile that can be used to connect to processes - ANSWER✔✔-toicankey A pipe
____ is a way to optimize search times by ordering the requests once the read/write heads have -
ANSWER✔✔-Rotational ordering
____ is necessary in any computer system because some resources such as memory, CPU, and -
ANSWER✔✔-Mutual exclusion
____ is when, in modern printing systems, a disk accepts output from several users and acts as a -
ANSWER✔✔-Spooling
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____ means that several logical records are grouped within one physical record. - ANSWER✔✔-Blocking
____ occurs when two processes do not release control of resources they are using. - ANSWER✔✔-
Resource holding
____ proposed a solution to the readers and writers problem that did not result in starvation -
ANSWER✔✔-Hoare
____ uses the same underlying philosophy as shortest job next, where the shortest jobs are processed
first and longer jobs are made to wait. - ANSWER✔✔-SSTF
_____ are used to model devices that consist of a collection of randomly addressable blocks such as
disks - ANSWER✔✔-toicankey A block special file
_____ is the command that writes the bottom 10 lines of a file to the screen. - ANSWER✔✔-tail
______ is resources that can be taken away from the process owning it with no ill effects - ANSWER✔✔-
toicankey preemptable
_______ is the rapid switching of the CPU between multiple processes in memory - ANSWER✔✔-
toicankey Multi-programming
_________is the act of allowing only one process to have access to a dedicated resource - ANSWER✔✔-
Mutual-exclusion condition
Page 2/92
, ©EMILLECT 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED
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: _____ is the command that writes the first 10 lines of a file to the screen. - ANSWER✔✔-head
: An Operating System is? - ANSWER✔✔-A program that acts as an intermediary between a user of a
computer and the computer hardware
: The _____ command will list all working processes? - ANSWER✔✔-ps
: What is the correct approach with the Hold and Wait condition to prevent Deadlock? - ANSWER✔✔-
Request all resources initially
: Which command is used to change a file's name? - ANSWER✔✔-mv
: Which command will display current day? - ANSWER✔✔-date
· The CPU sets the DMA controller registers so DMA knows what to transfer where, and how many
transfer ; · The CPU command the disk controller read data from disk to internal buffer, then verify the
checksum· The disk controller sends an acknowledgement signal to DMA controller when the write is
complete ; · Simultaneously, the DMA controller decides which device to service next (using RR or
priority scheme)· In each transfer, the DMA controller increments the memory addresses to use and
decrements the byte count ; · If the byte count is still greater than 0, step 2 through 4 are repeated until
the count reaches 0· If the byte equals 0, the DMA controller interrupts the CPU to let it know the
transfer is now complete ; · The disk controller transfer a word/ byte from internal buffers to main
memory at the address that is described in the DMA's memory address register· The DMA controller
initiates the transfer by issu - ANSWER✔✔-toicankeyMemory-Mapped I/O
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FIRST PUBLISH OCTOBER 2024
1. A requests R ; 2. C requests T3. A requests S ; 4. C requests R5. A releases R ; 6. A releases S7. B
requests S ; 8. C requests S9. B requests R - ANSWER✔✔-toicankey The system is deadlock ; toicankey
The system can be resolved by process B attacks the No-Preemption condition
1. A requests R ; 2. C requests T3. A requests S ; 4. C requests R5. A releases R ; 6. A releases S7. B
requests S - ANSWER✔✔-toicankey The system is in safe state ; toicankey All process no deadlock
1. It is a list of memory locations (set of addresses) from 0 to some maximum, which the process can
read and write ; 2. It make the different programs think they have the hardware on their ownWhat's is
it? - ANSWER✔✔-toicankey Address space
1. It uses a table of counters per files. ; 2. Traverse the directory tree, incrementing the counter when
each every i-node in every directory 3. When the checker is all done, it has a list, indexed by i-node
number, telling how many directories contain each file ; 4. It then compares these numbers with the link
counts stored in the i-node themselves Which checking is applied with the above description? -
ANSWER✔✔-toicankey Checking for directory and its file in consistency
1. Map a disk block to a page (s) in memory and page used the file on disk as the backing store ; 2.
Allowing a part of the virtual address space to be logically associated with the fileWhat's is the strategy?
- ANSWER✔✔-toicankey Memory-mapped file
1. Put the argument of called function on the stack ; 2. The interrupt occurs to switch from user mode to
kernel mode3. The system functions are located and executed ; 4. After finished, the interrupt occurs
Page 4/92
FIRST PUBLISH OCTOBER 2024
OSG202 Exam Questions and Answers
____ developed the Banker's Algorithm. - ANSWER✔✔-Dijkstra
____ gives users the appearance that their programs are being completely loaded in main -
ANSWER✔✔-Virtual memory
____ include(s) every peripheral unit in the system such as printers, disk drives, CD/DVD drives, flash
memory, keyboards, and so on. - ANSWER✔✔-I/O Devices
____ introduced the need for control cards, which defined the exact nature of each program -
ANSWER✔✔-Job scheduling
____ is a sort of pseudofile that can be used to connect to processes - ANSWER✔✔-toicankey A pipe
____ is a way to optimize search times by ordering the requests once the read/write heads have -
ANSWER✔✔-Rotational ordering
____ is necessary in any computer system because some resources such as memory, CPU, and -
ANSWER✔✔-Mutual exclusion
____ is when, in modern printing systems, a disk accepts output from several users and acts as a -
ANSWER✔✔-Spooling
Page 1/92
, ©EMILLECT 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED
FIRST PUBLISH OCTOBER 2024
____ means that several logical records are grouped within one physical record. - ANSWER✔✔-Blocking
____ occurs when two processes do not release control of resources they are using. - ANSWER✔✔-
Resource holding
____ proposed a solution to the readers and writers problem that did not result in starvation -
ANSWER✔✔-Hoare
____ uses the same underlying philosophy as shortest job next, where the shortest jobs are processed
first and longer jobs are made to wait. - ANSWER✔✔-SSTF
_____ are used to model devices that consist of a collection of randomly addressable blocks such as
disks - ANSWER✔✔-toicankey A block special file
_____ is the command that writes the bottom 10 lines of a file to the screen. - ANSWER✔✔-tail
______ is resources that can be taken away from the process owning it with no ill effects - ANSWER✔✔-
toicankey preemptable
_______ is the rapid switching of the CPU between multiple processes in memory - ANSWER✔✔-
toicankey Multi-programming
_________is the act of allowing only one process to have access to a dedicated resource - ANSWER✔✔-
Mutual-exclusion condition
Page 2/92
, ©EMILLECT 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED
FIRST PUBLISH OCTOBER 2024
: _____ is the command that writes the first 10 lines of a file to the screen. - ANSWER✔✔-head
: An Operating System is? - ANSWER✔✔-A program that acts as an intermediary between a user of a
computer and the computer hardware
: The _____ command will list all working processes? - ANSWER✔✔-ps
: What is the correct approach with the Hold and Wait condition to prevent Deadlock? - ANSWER✔✔-
Request all resources initially
: Which command is used to change a file's name? - ANSWER✔✔-mv
: Which command will display current day? - ANSWER✔✔-date
· The CPU sets the DMA controller registers so DMA knows what to transfer where, and how many
transfer ; · The CPU command the disk controller read data from disk to internal buffer, then verify the
checksum· The disk controller sends an acknowledgement signal to DMA controller when the write is
complete ; · Simultaneously, the DMA controller decides which device to service next (using RR or
priority scheme)· In each transfer, the DMA controller increments the memory addresses to use and
decrements the byte count ; · If the byte count is still greater than 0, step 2 through 4 are repeated until
the count reaches 0· If the byte equals 0, the DMA controller interrupts the CPU to let it know the
transfer is now complete ; · The disk controller transfer a word/ byte from internal buffers to main
memory at the address that is described in the DMA's memory address register· The DMA controller
initiates the transfer by issu - ANSWER✔✔-toicankeyMemory-Mapped I/O
Page 3/92
, ©EMILLECT 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED
FIRST PUBLISH OCTOBER 2024
1. A requests R ; 2. C requests T3. A requests S ; 4. C requests R5. A releases R ; 6. A releases S7. B
requests S ; 8. C requests S9. B requests R - ANSWER✔✔-toicankey The system is deadlock ; toicankey
The system can be resolved by process B attacks the No-Preemption condition
1. A requests R ; 2. C requests T3. A requests S ; 4. C requests R5. A releases R ; 6. A releases S7. B
requests S - ANSWER✔✔-toicankey The system is in safe state ; toicankey All process no deadlock
1. It is a list of memory locations (set of addresses) from 0 to some maximum, which the process can
read and write ; 2. It make the different programs think they have the hardware on their ownWhat's is
it? - ANSWER✔✔-toicankey Address space
1. It uses a table of counters per files. ; 2. Traverse the directory tree, incrementing the counter when
each every i-node in every directory 3. When the checker is all done, it has a list, indexed by i-node
number, telling how many directories contain each file ; 4. It then compares these numbers with the link
counts stored in the i-node themselves Which checking is applied with the above description? -
ANSWER✔✔-toicankey Checking for directory and its file in consistency
1. Map a disk block to a page (s) in memory and page used the file on disk as the backing store ; 2.
Allowing a part of the virtual address space to be logically associated with the fileWhat's is the strategy?
- ANSWER✔✔-toicankey Memory-mapped file
1. Put the argument of called function on the stack ; 2. The interrupt occurs to switch from user mode to
kernel mode3. The system functions are located and executed ; 4. After finished, the interrupt occurs
Page 4/92
