ITQUIZ

Saturday 20 October 2018

IT OS PROCESSES 1

1. The systems which allows only one process execution at a time, are called
a) uniprogramming systems
b) uniprocessing systems
c) unitasking systems
d) none of the mentioned

2. In operating system, each process has its own
a) address space and global variables
b) open files
c) pending alarms, signals and signal handlers
d) all of the mentioned

3. In Unix, Which system call creates the new process?
a) fork
b) create
c) new
d) none of the mentioned

4. A process can be terminated due to
a) normal exit
b) fatal error
c) killed by another process
d) all of the mentioned

5. What is the ready state of a process?
a) when process is scheduled to run after some execution
b) when process is unable to run until some task has been completed
c) when process is using the CPU
d) none of the mentioned

Answer:
1. b
Explanation: Those systems which allows more than one process execution at a time, are called multiprogramming systems. Uniprocessing means only one processor.
2. d
3. a
4. d
5. a
Explanation: When process is unable to run until some task has been completed, the process is in blocked state and if process is using the CPU, it is in running state.

6. What is interprocess communication?
a) communication within the process
b) communication between two process
c) communication between two threads of same process
d) none of the mentioned

7. A set of processes is deadlock if
a) each process is blocked and will remain so forever
b) each process is terminated
c) all processes are trying to kill each other
d) none of the mentioned

8. A process stack does not contain
a) Function parameters
b) Local variables
c) Return addresses
d) PID of child process

9. Which system call returns the process identifier of a terminated child?
a) wait
b) exit
c) fork
d) get

10. The address of the next instruction to be executed by the current process is provided by the
a) CPU registers
b) Program counter
c) Process stack
d) Pipe

Answer:
6. b
7. a
8. d
9. a

10. b

Friday 19 October 2018

IT OS BASIC QUIZ 1

1. What is operating system?

a) collection of programs that manages hardware resources

b) system service provider to the application programs

c) link to interface the hardware and application programs

d) all of the mentioned

2. To access the services of operating system, the interface is provided by the

a) System calls

b) API

c) Library

d) Assembly instructions

3. Which one of the following is not true?

a) kernel is the program that constitutes the central core of the operating system

b) kernel is the first part of operating system to load into memory during booting

c) kernel is made of various modules which can not be loaded in running operating system

d) kernel remains in the memory during the entire computer session

4. Which one of the following error will be handle by the operating system?

a) power failure

b) lack of paper in printer

c) connection failure in the network

d) all of the mentioned

5. The main function of the command interpreter is

a) to get and execute the next user-specified command

b) to provide the interface between the API and application program

c) to handle the files in operating system

d) none of the mentioned

Answer:
1. d
2. a
3. c
4. d
5. a

6. By operating system, the resource management can be done via

a) time division multiplexing

b) space division multiplexing

c) both time and space division multiplexing

d) none of the mentioned

7. If a process fails, most operating system write the error information to a ______

a) log file

b) another running process

c) new file

d) none of the mentioned

8. Which facility dynamically adds probes to a running system, both in user processes and in the kernel?

a) DTrace

b) DLocate

c) DMap

d) DAdd

9. Which one of the following is not a real time operating system?

a) VxWorks

b) Windows CE

c) RTLinux

d) Palm OS

10. The OS X has ____________

a) monolithic kernel

b) hybrid kernel

c) microkernel

d) monolithic kernel with modules

Answer:
6. c
7. a
8. a
9. d
10. b

Thursday 18 October 2018

IT QUIZ RANDOM MEGA 1

1. The tracks on a disk which can be accused without repositioning the R/W heads is

a. Surface
b. Cylinder
c. Cluster
d. All of these
e. None of these

Ans : b

2. Which of the following is true about GUIs ?

a. They make computers easier to use for non professionals
b. They use icons and menus that users can select with a mouse
c. Both a and b
d. All of these
e. None of these

Ans : c

3. A computer system consisting of its processor, memory and I/O devices accepts data, processes it and produces the output results. Can you tell in which component is the raw data fed ?

a. Mass Memory
b. Main Memory
c. Logic Unit
d. Arithmetic Unit
e. None of these

Ans : b

4. The mechanical diskette drive in which you insert your diskette is connected to the computer's bus

a. Data
b. Communication
c. Address
d. Parallel
e. None of these

Ans : b

5. A set of programs that handle firm's database responsibilities is called a

a. Data Base Management System (DBMS)
b. Data Base Processing System (DBPS)
c. Data Management System (DMS)
d. All of these
e. None of these

Ans : d

6. You are in the process of analyzing a problem that requires you to collect and store TCP/IP Packets. Which of the following utilities is best suited for this purpose ?

a. NBTSTAT
b. Performance Monitor
c. NETSTAT
d. Network Monitor
e. DHCP Management Console

Ans : d

7. A top to bottom relationship among the items in a database is established by a

a. Hierarchical Schema
b. Network Schema
c. Relational Schema
d. All of these
e. None of these

Ans : a

8. The process of transferring data intended for a peripheral device into a disk (or intermediate store) so that it can be transferred to peripheral at a more convenient time or in bulk is known as

a. Multi Programming
b. Spooling
c. Caching
d. Virtual Programming
e. None of these

Ans : b

9. Which of the following system program forgoes the production of object code to generate absolute machine code and load it into the physical main storage location from which it will be executed immediately upon completion of the assembly ?

a. Two pass assembler
b. Load and go assembler
c. Macro processor
d. Compiler
e. None of these

Ans : b

10. Relocation bits used by relocating loader are specified (generated) by

a. Relocating loader itself
b. Linker
c. Assembler or translator
d. Macro Processor
e. None of these

Ans : b

11. From what location are the 1st computer instructions available on boot up ?

a. ROM BIOS
b. CPU
c. Boot.ini
d. CONFIG.SYS
e. None of these

Ans : a

12. Abstraction is

a. The act of representing the essential features of something without including much detail
b. The act of representing the features of something much detail
c. A tree structure
d. All of these
e. None of these

Ans : a

13. Aggregation is a special form of _

a. Generalization
b. Spectalization
c. Association
d. Object
e. None of these

Ans : c

14. Consider an operation of addition. For two numbers, the operating will generate a sum. If the operand are strings and the same operation would produce a third string by concatenation. This feature is called

a. Inheritance
b. Encapsulation
c. Polymorphism
d. Binding
e. None of these

Ans : c

15. In E - R diagrams, the term cardinality is a synonym for the term _

a. Attribute
b. Degree
c. Entities
d. Cartesian
e. None of these

Ans : b

16. An oracle server index

a. Is a schema object
b. Is used to speed up the retrieval of rows by using a pointer
c. Is independent of the table it indexes
d. All of these
e. None of these

Ans : d

17. Which of the following is not a context free grammar components ?

a. Terminal symbols
b. Non termincal symbol
c. Production line
d. List
e. None of these

Ans : d

18. Which of the following is a phase of RAD model ?

a. Business modeling
b. Data modeling
c. Application generation
d. All of these
e. None of these

Ans : d

19. __ is a set design steps that allows a DFD with transform flow characteristics to be mapped into a predefined template for program structure.

a. Transaction flow
b. Contributor
c. Transform mapping
d. Design evaluation
e. None of these

Ans : c

20. A combinational logic circuit which is used to send data coming from a single source to two or more separate destinations is called as

a. Decoder
b. Encoder
c. Multiplexer
d. Demultiplexer
e. None of these

Ans : d

21. Which of the following is a Universal Gate ?

a. AND
b. OR
c. EX - OR
d. NAND
e. None of these

Ans : d

22. The 2's compliment of binary number 010111.1100 is

a. 101001.1100
b. 101000.0100
c. 010111.0011
d. 101000.0011
e. None of these

Ans : b

23. In 8086, the overflow flag is set when

a. The sum is more than 16 bits
b. Signed numbers go out their range after an arithmetic operation
c. Carry and sign flags are set
d. During subtraction
e. None of these

Ans : b

24. What does mircro processor speed depends on ?

a. Clock
b. Data bus width
c. Address bus width
d. All of these
e. None of these

Ans : c

25. The TRAP is one of the interrupts available its INTEL 8086. Which one statement is true of TRAP ?

a. It is level triggered
b. It is negative edge triggered
c. It is positive edge triggered
d. It is both positive edge triggered and level triggered
e. None of these

Ans : d

26. A special type gateway that can keep external users from accessing resources on the LAN users access the external info is called _

a. Repeater
b. Firewall
c. Encryption
d. Hub
e. None of these

Ans : b

27. What is the name given to the exchange of control signals which is necessary for establishing a connection between a modem and a computer at one end of a line and another modem and computer at the other end ?

a. Handshaking
b. Modem Options
c. Protocol
d. All of these
e. None of these

Ans : a

28. In SQL, which command is used to change data in a data table ?

a. UPDATE
b. INSERT
c. BROWSE
d. APPEND
e. None of these

Ans : a

29. In SQL, which of the following is not a data definition language command ?

a. RENAME
b. REVOKE
c. GRANT
d. UPDATE
e. None of these

Ans : d

30. Which command(s) is(are) used to redefine a column of the table in SQL ?

a. ALTER TABLE
b. DEFINE TABLE
c. MODIFY TABLE
d. All of these
e. None of these

Ans : a

31. In a relational schema, each tuple is divided into fields called

a. Relations
b. Domains
c. Queries
d. All of the these
e. None of these

Ans : b

32. An indexing operation

a. Sorts a file using a single key
b. Sorts file using two keys
c. Establishes an index for a file
d. Both a and c
e. None of these

Ans : c

33. Data security threats include

a. Hardware failure
b. Privacy invasion
c. Fraudulent manipulation of data
d. All of these
e. None of these

Ans : b

34. The language used in application programs to request data from the DBMS is referred to as the

a. DML
b. DDL
c. Query Language
d. DCL
e. None of these

Ans : a

35. A contains the smallest unit of meaningful data, so you might call it the basic building block for a data file.

a. File Structures
b. Records
c. Fields
d. Data base
e. None of these

Ans : c

36. A means that one record in a particular record type is related to only one record of another record type.

a. One-to-one relationship
b. One-to-many relationship
c. Many-to-one relationship
d. Many-to-many relationship
e. None of these

Ans : a

37. Through linked list one can implement

a. Stack
b. Graph
c. Queue
d. All of these
e. None of these

Ans : d

38. A heap allows a very efficient implementation of a

a. Double ended queue
b. Priority queue
c. Stack
d. Trees
e. None of these

Ans : b

39. In files, there is a key associated with each record which is used to differentiate among different records. For every file there is atleast one set of keys that is unique. Such a Key is called

a. Unique Key
b. Prime attribute
c. Index key
d. Primary Key
e. Null key

Ans : d

40. _ is primarily used for mapping host names and email destinations to IP address but can also be used for other purposes

a. TCP (Transfer Control Protocol)
b. DNS (Domain Name System)
c. SHA (Secure Hash Algorithm)
d. Simple Network Management Protocol (SNMP)
e. None of these

Ans : b

41. Override is a method

a. For an operation that replaces an inherited method for the same operation
b. For a data that replaces an inherited method for the same operation
c. For an operation that takes arguments from library function
d. All of these
e. None of these

Ans : a

42. Local Variables

a. Are created outside a block
b. Are known only to that block
c. Continue to exist when their block ends
d. Are illegal in C++
e. None of these

Ans : b

43. is virus that inserts itself into a system's memory. Then it take number of actions when an infected file is executed.

a. Web scripting virus
b. Polymorphic Virus
c. Macro virus
d. Boot sector virus
e. Resident virus

Ans : e

44. This _ data mining technique derives rules from real world case examples.

a. Waterfall model
b. RAD
c. White Box
d. Spiral model
e. Case based reasoning

Ans : e

45. The model remains operative until the software is required.

a. Waterfall model
b. Incremental model
c. Spiral model
d. Prototyping model
e. Incremental model

Ans : c

46. Data mining evolve as a mechanism to cater the limitations of systems to deal massive data sets with high dimensionality, new data type, multiple heterogeneous data resource etc..

a. OLTP
b. OLAP
c. DSS
d. DWH
e. None of these

Ans : a

47. An important application of cryptography, used in computerized commercial and financial transaction

a. Data mining
b. Data warehousing
c. Digital signature
d. Media convergence
e. None of these

Ans : c

48. Rows of a relation are called

a. Relation
b. Tuples
c. Data structure
d. An entity
e. None of these

Ans : b

49. The drawbacks of the binary tree sort are remedied by the

a. Linear sort
b. Quick sort
c. Heap Sort
d. Insertion sort
e. None of these

Ans : c

50. Which layer of OSI determines the interface of the system with the user ?

a. Network
b. Application
c. Data link
d. Session
e. None of these

Ans : b

Wednesday 17 October 2018

IT DBMS QUIZ 8

1.Sort/report generators
A. are faster than index/report generators
B. require more disk space than index/report generators
C. do not need to sort before generating a report
D. both (a) and (b)
E. None of the above

2.The data dictionary tells the DBMS
A. what files are in the database
B. what attribute are possessed by the data
C. what these files contain
D. All of the above
E. None of the above

3.In SQL, which command(s) is(are) used to enable/disable a database trigger?
A. MODIFY USER
B. CHANGE USER
C. ALTER TRIGGER
D. All of the above
E. None of the above

4.If the record management system allows you to edit values before they are recorded on disk, you can
A. correct spelling changes before they are recorded
B. change the name of a field
C. change the width of a field
D. All of the above
E. None of the above

5.The relational model uses some unfamiliar terminology. A tuple is equivalent to a:
A. record
B. field
C. file
D. data base
E. data item

Answer
1 A
2 D
3 C
4 A
5 A

6.The files stored on a secondary stage device are composed of a hierarchy of data. What does a record in a file contain?
A. Bits
B. Characters
C. Data field
D. Schema
E. None of the above

7.Which command is used to remove an index from the database in SQL?
A. DELETE INDEX
B. DROP INDEX
C. REMOVE INDEX
D. ROLL BACK INDEX
E. None of the above

8.An-owner-member set in the CODASYL specifications may have
A. only one owner but many owner occurrences
B. only one member but many member occurrence
C. more than one member but only one occurrence per member
D. All of the above
E. None of the above

9.What is the name given to the database management system which is able to handle full text data, image data, audio and video?
A. Full media
B. Graphics media
C. Multimedia
D. Hypertext
E. None of the above

10.A top-to-bottom relationship among the items in a database is established by a
A. Hierarchical schema
B. Network schema
C. Relational schema
D. All of the above
E. None of the above

Answer
6 C
7 B
8 A
9 C
10 A

IT DBMS QUIZ 7

1.A report generator is used to
A. update files
B. print files on paper
C. data entry
D. All of the above
E. None of the above

2. Which of the following is not a logical data-base structure?
A. tree
B. relational
C. network
D. chain
E. All of the above

3.Which of the following is a database administrator's function?
A. database design
B. backing up the database
C. performance monitoring
D. user coordination
E. All of the above

4.Primitive operations common to all record management systems include
A. Print
B. Sort
C. Look-up
D. All of the above
E. None of the above

5.Each of data files has a _____ that describe the way the data is stored in the file.
A. File structure
B. Records
C. Fields
D. Database
E. None of the above

Answer :
1. B
2. D
3. D
4. C
5. D

6.After you _____ a record, many data management the environments require you to issue a command to save the changes you made.
A. Delete
B. Update
C. Sort key
D. Index
E. None of the above

7.What is the language used by most of the DBMSs for helping their users to access data?
A. High level language
B. Query language
C. SQL
D. 4GL
E. None of the above

8.Data item characteristics that are important in data management include
A. punctuation
B. language
C. spelling
D. width
E. None of the above

9.In SQL, which command is used to make permanent changes made by statements issue since the beginning of a transaction?
A. ZIP
B. PACK
C. COMMIT
D. SAVE
E. None of the above

10.Periodically adding, changing and deleting file records is called file
A. Updating
B. upgrading
C. restructuring
D. renewing
E. None of the above

Answer :
6 B
7 B
8 D
9 C
10 A