MCQOPTIONS
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MCQOPTIONS
This section includes 1690 Mcqs, each offering curated multiple-choice questions to sharpen your Technical Programming knowledge and support exam preparation. Choose a topic below to get started.
| 751. |
The protection domain of a process contains |
| A. | object name |
| B. | rights-set |
| C. | both object name and rights-set |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 752. |
For system protection, a process should access |
| A. | all the resources |
| B. | only those resources for which it has authorization |
| C. | few resources but authorization is not required |
| D. | all of the mentioned |
| Answer» C. few resources but authorization is not required | |
| 753. |
_______ is an approach to restricting system access to authorized users. |
| A. | Role-based access control |
| B. | Process-based access control |
| C. | Job-based access control |
| D. | None of the mentioned |
| Answer» B. Process-based access control | |
| 754. |
Which principle states that programs, users and even the systems be given just enough privileges to perform their task? |
| A. | principle of operating system |
| B. | principle of least privilege |
| C. | principle of process scheduling |
| D. | none of the mentioned |
| Answer» C. principle of process scheduling | |
| 755. |
What are various roles of protection ? |
| A. | It is used to detect errors which can prevent contamination of system |
| B. | It is used used to accelerate a process |
| C. | It is used to optimize system downtime |
| D. | None of the mentioned |
| Answer» B. It is used used to accelerate a process | |
| 756. |
What is ‘separation’ in security of Operating systems ? |
| A. | To have separate login for different users |
| B. | To have separate Hard disk drive/partition for different users |
| C. | It means keeping one user’s objects separate from other users |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 757. |
Which of the following objects require protection ? |
| A. | CPU |
| B. | Printers |
| C. | Motherboard |
| D. | All of the mentioned |
| Answer» C. Motherboard | |
| 758. |
Which is an unsolvable problem in access-matrix ? |
| A. | Owner override |
| B. | Brute force |
| C. | Access denied |
| D. | Confinement |
| Answer» E. | |
| 759. |
Which two rights allow a process to change the entries in a column ? |
| A. | copy and transfer |
| B. | copy and owner |
| C. | owner and transfer |
| D. | deny and copy |
| Answer» B. copy and owner | |
| 760. |
What are the three copyrights ? |
| A. | copy |
| B. | transfer |
| C. | limited copy |
| D. | All of the mentioned |
| Answer» E. | |
| 761. |
Who can add new rights and remove some rights ? |
| A. | copy |
| B. | transfer |
| C. | limited copy |
| D. | owner |
| Answer» E. | |
| 762. |
What are the three additional operations to change the contents of the access-matrix ? |
| A. | copy |
| B. | Owner |
| C. | control |
| D. | all of the mentioned |
| Answer» E. | |
| 763. |
What does access matrix represent ? |
| A. | Rows-Domains, Columns-Objects |
| B. | Rows-Objects, Columns-Domains |
| C. | Rows-Access List, Columns-Domains |
| D. | Rows-Domains, Columns-Access list |
| Answer» B. Rows-Objects, Columns-Domains | |
| 764. |
What is Domain ? |
| A. | Domain = Set of all objects |
| B. | It is a collection of protection policies |
| C. | Domain= set of access-rights |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 765. |
What is meaning of right-set ? |
| A. | It is a subset consist of read and write |
| B. | It is a subset of all valid operations that can be performed on the object |
| C. | It is a subset consist of read,write and execute |
| D. | None of the mentioned |
| Answer» C. It is a subset consist of read,write and execute | |
| 766. |
The surface area of a tape is ________ the surface area of a disk. |
| A. | much lesser than |
| B. | much larger than |
| C. | equal to |
| D. | none of the mentioned |
| Answer» C. equal to | |
| 767. |
A typical tape drive is ________ a typical disk drive. |
| A. | more expensive than |
| B. | cheaper than |
| C. | of the same cost as |
| D. | none of the mentioned |
| Answer» B. cheaper than | |
| 768. |
Random access to tape is _______ a disk seek. |
| A. | much slower than |
| B. | much faster than |
| C. | comparable to |
| D. | none of the mentioned |
| Answer» B. much faster than | |
| 769. |
A tape holds _______ data than optical or magnetic disk cartridge. |
| A. | lesser |
| B. | more |
| C. | much lesser |
| D. | none of the mentioned |
| Answer» C. much lesser | |
| 770. |
WORM stands for : |
| A. | write only, read mandatory |
| B. | write once, read many times |
| C. | write only once, read multiple |
| D. | none of the mentioned |
| Answer» C. write only once, read multiple | |
| 771. |
The phase change disk is coated with a material that can freeze into either _______ or ________ state. |
| A. | crystalline, solid |
| B. | ice, amorphous |
| C. | crystalline, liquid |
| D. | crystalline, liquid |
| Answer» E. | |
| 772. |
Optical disks ______ magnetism. |
| A. | use |
| B. | do not use |
| C. | may use |
| D. | none of the mentioned |
| Answer» C. may use | |
| 773. |
The magneto-optic head flies ___________ the disk surface than a magnetic disk head does. |
| A. | much farther from |
| B. | much closer to |
| C. | at the same distance as |
| D. | none of the mentioned |
| Answer» B. much closer to | |
| 774. |
A magneto-optic disk is : |
| A. | primary storage |
| B. | secondary storage |
| C. | removable disk |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 775. |
Floppy disks are examples of : |
| A. | primary storage |
| B. | secondary storage |
| C. | tertiary storage |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 776. |
Tertiary storage is built with : |
| A. | a lot of money |
| B. | unremovable media |
| C. | removable media |
| D. | secondary storage |
| Answer» D. secondary storage | |
| 777. |
RAID level 3 does not have _________ as in RAID level 1. |
| A. | efficiency |
| B. | enough storage space for data |
| C. | storage overhead |
| D. | time consumption overhead |
| Answer» D. time consumption overhead | |
| 778. |
RAID level ______ is also known as memory style error correcting code(ECC) organization |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 779. |
A single parity bit can be used for : |
| A. | detection |
| B. | multiple error corrections |
| C. | few error corrections |
| D. | all of the mentioned |
| Answer» B. multiple error corrections | |
| 780. |
RAID level ______ is also known as bit interleaved parity organisation. |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | 3 |
| Answer» E. | |
| 781. |
RAID level _______ refers to disk mirroring. |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | 3 |
| Answer» C. 2 | |
| 782. |
RAID level ________ refers to disk arrays with striping at the level of blocks, but without any redundancy. |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | 3 |
| Answer» B. 1 | |
| 783. |
The mean time to failure of a mirrored disk depends on : I) the mean time to failure of individual disks II) the mean time to repair |
| A. | Only I |
| B. | Only I I |
| C. | Both I and II |
| D. | Neither I nor II |
| Answer» D. Neither I nor II | |
| 784. |
The technique of duplicating every disk is known as : |
| A. | mirroring |
| B. | shadowing |
| C. | redundancy |
| D. | all of the mentioned |
| Answer» B. shadowing | |
| 785. |
The solution to the problem of reliability is the introduction of __________ |
| A. | aging |
| B. | scheduling |
| C. | redundancy |
| D. | disks |
| Answer» D. disks | |
| 786. |
If the mean time to failure of a single disk is 100,000 hours, then the mean time to failure of some disk in an array of 100 disks will be : |
| A. | 100 hours |
| B. | 10 days |
| C. | 10 hours |
| D. | 1000 hours |
| Answer» E. | |
| 787. |
RAID stands for : |
| A. | Redundant Allocation of Inexpensive Disks |
| B. | Redundant Array of Important Disks |
| C. | Redundant Allocation of Independent Disks |
| D. | Redundant Array of Independent Disks |
| Answer» E. | |
| 788. |
A large number of disks in a system improves the rate at which data can be read or written : |
| A. | if the disks are operated on sequentially |
| B. | if the disks are operated on selectively |
| C. | if the disks are operated in parallel |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| 789. |
Where performance and reliability are both important, RAID level ____ is used. |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | 0+1 |
| Answer» E. | |
| 790. |
If a disk fails in RAID level ___ rebuilding lost data is easiest. |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» B. 2 | |
| 791. |
RAID level 0+1 is used because, RAID level 0 provides ______ whereas RAID level 1 provides ________ |
| A. | performance, redundancy |
| B. | performance, reliability |
| C. | redundancy, performance |
| D. | none of the mentioned |
| Answer» C. redundancy, performance | |
| 792. |
The potential overuse of a single parity disk is avoided in RAID level _______ |
| A. | 3 |
| B. | 4 |
| C. | 5 |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| 793. |
RAID level ____ spreads parity and data among all N+1 disks rather than storing data in N disks and parity in 1. |
| A. | 3 |
| B. | 4 |
| C. | 5 |
| D. | 6 |
| Answer» D. 6 | |
| 794. |
RAID level 5 is also known as : |
| A. | bit-interleaved parity organization |
| B. | block-interleaved parity organization |
| C. | block-interleaved distributed parity |
| D. | memory-style ECC organization |
| Answer» D. memory-style ECC organization | |
| 795. |
A write of a block has to access : |
| A. | the disk on which the block is stored |
| B. | parity disk |
| C. | a parity block |
| D. | all of the mentioned |
| Answer» E. | |
| 796. |
The overall I/O rate in RAID level 4 is : |
| A. | low |
| B. | very low |
| C. | high |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 797. |
In RAID level 4, one block read, accesses __________ |
| A. | only one disk |
| B. | all disks simultaneously |
| C. | all disks sequentially |
| D. | none of the mentioned |
| Answer» B. all disks simultaneously | |
| 798. |
A performance problem with _________ is the expense of computing and writing parity. |
| A. | non-parity based RAID levels |
| B. | parity based RAID levels |
| C. | all RAID levels |
| D. | none of the mentioned |
| Answer» C. all RAID levels | |
| 799. |
RAID level _____ is also known as block interleaved parity organisation and uses block level striping and keeps a parity block on a separate disk. |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» E. | |
| 800. |
RAID level 3 supports a lower number of I/Os per second, because _______________ |
| A. | Every disk has to participate in every I/O request |
| B. | Only one disk participates per I/O request |
| C. | I/O cycle consumes a lot of CPU time |
| D. | All of the mentioned |
| Answer» B. Only one disk participates per I/O request | |