McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Computer Science Engineering (CSE) , Bachelor of Science in Computer Science FY (BSc CS) , Bachelor of Science in Computer Science SY (BSc CS) , Bachelor of Science in Information Technology SY (BSc IT) , Bachelor of Computer Applications (BCA) .
Chapters
| 651. |
is increasingly being used in server systems to improve performance by caching frequently used data, since it provides faster access than disk, with larger storage capacity than main memory. |
| A. | flash memory |
| B. | disk |
| C. | main memory |
| D. | secondary memory |
| Answer» A. flash memory | |
| 652. |
The primary medium for the long-term online storage of data is the where the entire database is stored on magnetic disk. |
| A. | semiconductor memory |
| B. | magnetic disks |
| C. | compact disks |
| D. | magnetic tapes |
| Answer» B. magnetic disks | |
| 653. |
Optical disk systems contain a few drives and numerous disks that can be loaded into one of the drives automatically (by a robot arm) on demand. |
| A. | tape storage |
| B. | jukebox |
| C. | flash memory |
| D. | all of the mentioned |
| Answer» B. jukebox | |
| 654. |
There are “record-once” versions of the compact disk and digital video disk, which can be written only once; such disks are also called disks. |
| A. | write-once, read-many (worm) |
| B. | cd-r |
| C. | dvd-w |
| D. | cd-rom |
| Answer» A. write-once, read-many (worm) | |
| 655. |
In magnetic disk stores information on a sector magnetically as reversals of the direction of magnetization of the magnetic material. |
| A. | read–write head |
| B. | read-assemble head |
| C. | head–disk assemblies |
| D. | disk arm |
| Answer» D. disk arm | |
| 656. |
A is the smallest unit of information that can be read from or written to the disk. |
| A. | track |
| B. | spindle |
| C. | sector |
| D. | platter |
| Answer» C. sector | |
| 657. |
The disk controller uses at each sector to ensure that the data is not corrupted on data retrieval. |
| A. | checksum |
| B. | unit drive |
| C. | read disk |
| D. | readsum |
| Answer» A. checksum | |
| 658. |
is the time from when a read or write request is issued to when data transfer begins. |
| A. | access time |
| B. | average seek time |
| C. | seek time |
| D. | rotational latency time |
| Answer» A. access time | |
| 659. |
The time for repositioning the arm is called the and it increases with the distance that the arm must move. |
| A. | access time |
| B. | average seek time |
| C. | seek time |
| D. | rotational latency time |
| Answer» C. seek time | |
| 660. |
is around one-half of the maximum seek time. |
| A. | access time |
| B. | average seek time |
| C. | seek time |
| D. | rotational latency time |
| Answer» B. average seek time | |
| 661. |
Hybrid disk drives are hard-disk systems that combine magnetic storage with a smaller amount of flash memory, which is used as a cache for frequently accessed data. |
| A. | hybrid drivers |
| B. | disk drivers |
| C. | hybrid disk drivers |
| D. | all of the mentioned |
| Answer» B. disk drivers | |
| 662. |
Optical disk technology uses |
| A. | helical scanning |
| B. | dat |
| C. | a laser beam |
| D. | raid |
| Answer» D. raid | |
| 663. |
With multiple disks, we can improve the transfer rate as well by data across multiple disks. |
| A. | striping |
| B. | dividing |
| C. | mirroring |
| D. | dividing |
| Answer» A. striping | |
| 664. |
partitions data and parity among all N+1 disks, instead of storing data in N-disks and parity in one disk. |
| A. | block interleaved parity |
| B. | block interleaved distributed parity |
| C. | bit parity |
| D. | bit interleaved parity |
| Answer» B. block interleaved distributed parity | |
| 665. |
The RAID level which mirroring is done along with stripping is |
| A. | raid 1+0 |
| B. | raid 0 |
| C. | raid 2 |
| D. | both raid 1+0 and raid 0 |
| Answer» D. both raid 1+0 and raid 0 | |
| 666. |
Where performance and reliability are both important, RAID level is used. |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | 0+1 |
| Answer» D. 0+1 | |
| 667. |
is popular for applications such as storage of log files in a database system since it offers the best write performance. |
| A. | raid level 1 |
| B. | raid level 2 |
| C. | raid level 0 |
| D. | raid level 3 |
| Answer» A. raid level 1 | |
| 668. |
which increases the number of I/O operations needed to write a single logical block, pays a significant time penalty in terms of write performance. |
| A. | raid level 1 |
| B. | raid level 2 |
| C. | raid level 5 |
| D. | raid level 3 |
| Answer» A. raid level 1 | |
| 669. |
Tertiary storage is built with : |
| A. | a lot of money |
| B. | unremovable media |
| C. | removable media |
| D. | secondary storage |
| Answer» C. removable media | |
| 670. |
Operating system is responsible for |
| A. | disk initialization |
| B. | booting from disk |
| C. | bad-bock recovery |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| 671. |
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» A. more expensive than | |
| 672. |
During recovery from a failure |
| A. | each pair of physical block is examined |
| B. | specified pair of physical block is examined |
| C. | first pair of physical block is examined |
| D. | none of the mentioned |
| Answer» A. each pair of physical block is examined | |
| 673. |
A magneto-optic disk is : |
| A. | primary storage |
| B. | secondary storage |
| C. | tertiary storage |
| D. | none of the mentioned |
| Answer» C. tertiary storage | |
| 674. |
Which of the following are the process of selecting the data storage and data access characteristics of the database? |
| A. | logical database design |
| B. | physical database design |
| C. | testing and performance tuning |
| D. | evaluation and selecting |
| Answer» B. physical database design | |
| 675. |
The replacement of a bad block generally is not totally automatic because |
| A. | data in bad block cannot be replaced |
| B. | data in bad block is usually lost |
| C. | bad block does not contain any data |
| D. | none of the mentioned |
| Answer» B. data in bad block is usually lost | |
| 676. |
Which of the following is the oldest database model? |
| A. | relational |
| B. | hierarchical |
| C. | physical |
| D. | network |
| Answer» D. network | |
| 677. |
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» B. much larger than | |
| 678. |
Which one of the following is not a secondary storage? |
| A. | magnetic disks |
| B. | magnetic tapes |
| C. | ram |
| D. | none of the mentioned |
| Answer» C. ram | |
| 679. |
Which level of RAID refers to disk mirroring with block striping? |
| A. | raid level 1 |
| B. | raid level 2 |
| C. | raid level 0 |
| D. | raid level 3 |
| Answer» A. raid level 1 | |
| 680. |
A unit of storage that can store one or more records in a hash file organization is denoted as |
| A. | buckets |
| B. | disk pages |
| C. | blocks |
| D. | nodes |
| Answer» A. buckets | |
| 681. |
The file organization which allows us to read records that would satisfy the join condition by using one block read is |
| A. | heap file organization |
| B. | sequential file organization |
| C. | clustering file organization |
| D. | hash file organization |
| Answer» C. clustering file organization | |
| 682. |
What are the correct features of a distributed database? |
| A. | is always connected to the internet |
| B. | always requires more than three machines |
| C. | users see the data in one global schema. |
| D. | have to specify the physical location of the data when an update is done |
| Answer» C. users see the data in one global schema. | |
| 683. |
Each tablespace in an Oracle database consists of one or more files called |
| A. | files |
| B. | name space |
| C. | datafiles |
| D. | pfile |
| Answer» C. datafiles | |
| 684. |
The management information system (MIS) structure with one main computer system is called a |
| A. | hierarchical mis structure |
| B. | distributed mis structure |
| C. | centralized mis structure |
| D. | decentralized mis structure |
| Answer» C. centralized mis structure | |
| 685. |
Choose the RDBMS which supports full fledged client server application development |
| A. | dbase v |
| B. | oracle 7.1 |
| C. | foxpro 2.1 |
| D. | ingress |
| Answer» B. oracle 7.1 | |
| 686. |
One approach to standardization storing of data? |
| A. | mis |
| B. | structured programming |
| C. | codasyl specification |
| D. | none of the mentioned |
| Answer» C. codasyl specification | |
| 687. |
The highest level in the hierarchy of data organization is called |
| A. | data bank |
| B. | data base |
| C. | data file |
| D. | data record |
| Answer» B. data base | |
| 688. |
An audit trail |
| A. | is used to make backup copies |
| B. | is the recorded history of operations performed on a file |
| C. | can be used to restore lost information |
| D. | none of the mentioned |
| Answer» B. is the recorded history of operations performed on a file | |
| 689. |
Large collection of files are called |
| A. | fields |
| B. | records |
| C. | database |
| D. | sectors |
| Answer» C. database | |
| 690. |
Which of the following is not true of the traditional approach to information processing |
| A. | there is common sharing of data among the various applications |
| B. | it is file oriented |
| C. | programs are dependent on the file |
| D. | it is inflexible |
| Answer» A. there is common sharing of data among the various applications | |
| 691. |
Which of these is not a feature of Hierarchical model? |
| A. | organizes the data in tree-like structure |
| B. | parent node can have any number of child nodes |
| C. | root node does not have any parent |
| D. | child node can have any number of parent nodes |
| Answer» D. child node can have any number of parent nodes | |
| 692. |
Which of these data models is an extension of the relational data model? |
| A. | object-oriented data model |
| B. | object-relational data model |
| C. | semi structured data model |
| D. | none of the mentioned |
| Answer» B. object-relational data model | |
| 693. |
The information about data in a database is called |
| A. | metadata |
| B. | hyper data |
| C. | tera data |
| D. | none of the mentioned |
| Answer» A. metadata | |
| 694. |
A data dictionary is a special file that contains? |
| A. | the names of all fields in all files |
| B. | the data types of all fields in all files |
| C. | the widths of all fields in all files |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| 695. |
The DBMS acts as an interface between what two components of an enterprise-class database system? |
| A. | database application and the database |
| B. | data and the database |
| C. | the user and the database application |
| D. | database application and sql |
| Answer» A. database application and the database | |
| 696. |
A relational database system needs to maintain data about the relations, such as the schema of the relations. This is called |
| A. | metadata |
| B. | catalog |
| C. | log |
| D. | dictionary |
| Answer» A. metadata | |
| 697. |
Relational schemas and other metadata about relations are stored in a structure called the |
| A. | metadata |
| B. | catalog |
| C. | log |
| D. | data dictionary |
| Answer» D. data dictionary | |
| 698. |
is the collection of memory structures and Oracle background processes that operates against an Oracle database. |
| A. | database |
| B. | instance |
| C. | tablespace |
| D. | segment |
| Answer» B. instance | |
| 699. |
A is a logical grouping of database objects, usually to facilitate security, performance, or the availability of database objects such as tables and indexes. |
| A. | tablespace |
| B. | segments |
| C. | extents |
| D. | blocks |
| Answer» A. tablespace | |
| 700. |
A tablespace is further broken down into |
| A. | tablespace |
| B. | segments |
| C. | extents |
| D. | blocks |
| Answer» B. segments | |
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