A Relation is a


Options: Subset of a Cartesian product of a list of attributes B. Subset of a Cartesian product of a list of domains C. Subset of a Cartesian product of a list of tuple D. Subset of a Cartesian product of a list of relations

Ans:– B ,


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More Database Systems Related questions:


. When you point to a text entry in the Office Clipboard gallery in the Clipboard task pane, _____.
Options: a. the first several characters of text in the item display as a ScreenTip b. the text entry is deleted from the Office Clipboard gallery c. the text entry is pasted into the document at the location of the insertion point d. all of the above

Ans: – A , – A


Which of the following is a technique for hiding the internal implementation details of an object?
Options: Encapsulation,    Polymorphism,    Inheritance,    All of the above.

Ans:A ,A


The OR, XOR & AND functions can be performed by _____ of the computer in a CPU.
Options: ALU,    CU,    Memory,    Register

Ans:A ,A


In which tcp_wrappers file can you specify to allow all connections from all hosts?
Options: /etc/hosts.allow,    /etc/hosts.deny,    /etc/hosts,    /etc/tcp.conf

Ans:A ,A


The feasibilities studied in preliminary investigation is (are):
Options: technical feasibility,    economic feasibility,    operational feasibility,    All of the above

Ans:D ,D


Terminal Table
Options: a permanent table which lists all key words and special symbols of the language in symbolic form,    a permanent table of decision rules in the form of patterns for matching with the uniform symbol table to discover syntactic structure,    consists of a full or partial list of the tokens as they appear in the program. Created by Lexical analysis and used for syntax analysis and interpretation,    contains all constants in the program

Ans:A ,A


Why are vacuum tubes also called valves?
Options: A) Because they can amplify the weak signals and make them strong B) Because they can stop or allow the flow of current C) Both of above D) None of above

Ans:-B,-B


The systems have been classified in different ways
Options: physical or abstract,    open or closed,    man-made information system,    All of the above

Ans:D ,D


. What is the default file extension created by notepad?
Options: a. .doc b. .html c. .txt d. .tif

Ans:6 – c ,6 – c


. Access file operations can be found by clicking the ____.
Options: a. Access Button b. Database Button c. Office Button d. Window Button

Ans:5 – c ,5 – c


. You can open the scenario Manager dialog box by choosing scenarios from the ….. menu.
Options: a. View b. Insert c. Format d. Tools

Ans:– d,– d


Which of the following is not a part of the CPU
Options: storage unit,    arithmetic and logic unit,    program unit,    control unit

Ans:C ,C


. To move to the beginning of a line of text, press the __________ key.
Options: a. a b. pageup c. enter d. home

Ans:9 – d ,9 – d


Page Up Key
Options: a. Moves the cursor one line up b. Moves the cursor one screen up c. Moves the cursor one page up d. Moves the cursor one paragraph up

Ans:–  B,–  B


Which one of the following statements most accurately reflects the nature of ac power?
Options: The current in an ac circuit flows in one direction, but changes value periodically,    The current in an ac circuit flows in one direction at a steady level,    The current in an ac circuit changes direction periodically,    The current in an ac circuit flows in two directions at the same time

Ans:C ,C


A condition that led to the development of databases was
Options: a demand for more data to support information needs,    an increase in the amount of data handled by organizations,    the proliferation of data files,    All of the above

Ans:D ,D


A method for representing digital data analog signals by changing the phase of the analog carrier to represent the digital information is known as
Options: PIA,    PSK,    PM,    PM

Ans:B ,B


A proportional plus integral contro¬ller can:
Options: has no transient response,    can compensate for lag,    can increase the system type,    both (b) and (c)

Ans:D ,D


. One computer that is not considered a portable computer is
Options: A) Minicomputer B) A laptop computer C) Tablet PC D) All of the above

Ans:A,A


The memory which is ultraviolet light erasable and electrically programmable is
Options: ROM,    PROM,    RAM,    EPROM

Ans:D,D


Which of the following is TRUE about argv?
Options: It is an array of character pointers,    It is a pointer to an array of character pointers,    It is an array of strings,    None of above

Ans:A ,A


12. What is the default file extension for all Word documents?
Options: a. .txts b. .word c. .docs d. .docx

Ans:– D ,– D


35. How can you make the selected character superscripted
Options: a. Ctrl + = b. Ctrl + Shift +  = c. Alt + Ctrl + Shift + = d. None of above

Ans:– B ,– B


Which of the following is used when a company goes outside its organization to develop a new system?
Options: data flow diagram,    systems flowchart,    project dictionary,    request for proposal

Ans:D ,D


Instructions and memory address are represented by
Options: A) Character code B) Binary codes C) Binary word D) Parity bit

Ans:-B,-B


The advantage of optimistic locking is that:
Options: the lock is obtained only after the transaction has processed.,    the lock is obtained before the transaction has processed.,    the lock never needs to be obtained.,    transactions that are best suited are those with a lot of activity.

Ans:A ,A


In order to arrange the countries from those with the highest population to those with the lowest, you need to sort on the population field in ……………
Options: ascending order B. descending order C. alphabetical order D. random order

Ans:– B ,


. UNIX operating system is a(n)
Options: a. Time sharing operating system b. Multi-user operating system c. Multi-tasking operating system d. All of the above

Ans:2 – d ,2 – d


The time taken for the read/write head to move to the correct track on the magnetic disk is called
Options: epoch delay,    latency delay,    seek time,    approach time

Ans:C ,C


Which is a permanent database in the general model of compiler?
Options: Literal Table,    Identifier Table,    Terminal Table,    Source code

Ans:C ,C


Binary numbers need more places for counting because:
Options: 0's and 1's can be added in front of them,    0's and 1's have to be properly placed,    They are always big numbers,    Binary base is small

Ans:D ,D


64. What is the default font used in MS Word 2007 document?
Options: a. Times New Roman b. Arial c. Calibri d. Preeti

Ans:– C ,– C


. The main elements of the _____ are the insertion point, end mark, mouse pointer, rulers, scroll bars, and status bar.
Options: a. Word toolbar b. Formatting toolbar c. Word document window d. Graphics toolbar

Ans: – C , – C


  How can the slide show be repeated continuously?
Options: loop continuously until ‘Esc’ B. repeat continuously     C. loop more D. none

Ans:– A ,


The difference between linear array and a record is
Options: a. An array is suitable for homogeneous data but the data items in a record may have different data type b. In a record, there may not be a natural ordering in opposed to linear array. c. A record form a hierarchical structure but a linear array does not d. All of above

Ans: d, d


In cyclic redundancy checking what is the CRC?
Options: the divisor,    the quotient,    the dividend,    the remainder

Ans:D ,D


When mapping a many-to-many unary relationship into a relation which of the following is true?
Options: One relation is created.,    Two relations are created.,    Three relations are created.,    Four relations are created.

Ans:B ,B


_____ tool allows you to change your default X Window desktop.
Options: utilinux,    cempre,    switchdesk,    window

Ans:C ,C


A device mounted on a communication satellite which receives, amplifies and re-transmits signals from earth station is
Options: Track,    Transponder,    Transistor,    Terminal

Ans:B ,B


. … are list of commands that appear on the screen
Options: a. GUIS b. Icons c. Menus d. Windows

Ans:6 – c ,6 – c


Which of the following applies to a class rather than an object?
Options: Query,    Update,    Scope,    Constructor

Ans:C ,C


. The original ASCII code used__bits of each byte, reserving that last bit for error checking
Options: A) 5 B) 6 C) 7 D) 8

Ans:C,C


. Relationships between tables can be graphically viewed in the _______________ window.
Options: a. Design b. Joins c. Relationships d. Tables

Ans:4 – c ,4 – c


In top down analyis and design
Options: each succeeding phase is more detailed than the phase before it,    each succeeding phase is as detailed as the phase before it.,    each succeeding phase is less detailed than the phase before it,    aLL of the above

Ans:A ,A


What are the distinct functions of layer 2 switching that increase available bandwidth on the network? Address learning Routing Forwarding and filtering Creating network loops Loop avoidance IP addressing
Options: 1, 3 and 5,    2, 4 and 6,    2 and 6,    3 and 5

Ans:A ,A


The three dimensions of system integrity do not include
Options: accuracy,    completeness,    security,    appropriateness

Ans:B ,B


A byte is comprised of:
Options: One bit,    Four bits,    Eight bits,    Sixteen bits

Ans:C,C


. When you quickly press and release the left mouse button twice you are
Options: a. Primary clicking b. Pointing c. Double clicking d. Secondary clicking

Ans:1 – c ,1 – c


A drum timer is a good example of:
Options: an output actuator,    an input sensor,    a position sensor,    a sequence controller

Ans:D ,D


. Who is the inventor of ABC Computer?
Options: A) John v. Atanasoff B) Clifford Berry C) Both of above D) None of above

Ans:3-C,3-C

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