_______ allow us to identify uniquely a tuple in the relation.

Options: Superkey B. Domain C. Attribute D. Schema

Ans:– A ,

Description: mcqquestions

Asked in: KCC-2018   |   JOA 556-2018  |  HRTC JTO-2017

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More Database Systems Related questions:

. When increasing the Control Padding, space is added where?
Options: a. Between the content of the controls and the outside edge of then controls b. Between all controls c. Between the control and the Form’s edge d. Between controls and gridlines

Ans:4 – b ,4 – b

What are the decimal and hexadecimal equivalents for the binary number 10110111?
Options: 69/0x2102,    183/B7,    173/A6,    83/0xC5

Ans:B ,B

Point out the error in the following program. #include<stdio.h> #include<stdarg.h> fun(...); int main() { fun(3, 7, -11.2, 0.66); return 0; } fun(...) { va_list ptr; int num; va_start(ptr, n); num = va_arg(ptr, int); printf("%d", num); }
Options: Error: fun() needs return type,    Error: ptr Lvalue required,    Error: Invalid declaration of fun(...),    No error

Ans:C ,C

What will be the output of the program (sample.c) given below if it is executed from the command line? cmd> sample friday tuesday sunday /* sample.c */ #include<stdio.h> int main(int sizeofargv, char *argv[]) { while(sizeofargv) printf("%s", argv[--sizeofargv]); return 0; }
Options: sample friday tuesday sunday,    sample friday tuesday,    sunday tuesday friday sample,    sunday tuesday friday

Ans:C ,C

In MS-DOS, relocatable object files and load modules have extensions
Options: .OBJ and .COM or .EXE, respectively,    .COM and .OBJ, respectively,    .EXE and .OBJ, respectively,    .DAS and .EXE, respectively

Ans:A ,A

A file produced by a spreadsheet 
Options: a. is generally stored on disk in an ASCII text fromat b. can be used as is by the DBMS c. both a and b d. none of the above


. Internal commands are
Options: a. Incorporated in the command.com b. Incorporate in the command directory c. Have external files d. All of the above

Ans:0 – a ,0 – a

Information about the items ordered (item description, price, warehouse location, etc.) is provided by the
Options: order entry subsystem,    manufacturing information system,    marketing information system,    billing subsystem

Ans:B ,B

The file created yesterday is called the
Options: "son" file,    "father" file,    "mother" file,    "grandfather file"

Ans:B ,B

. Which one is the last column header in Excel 2007?
Options: XFD B. XFX C. XFL D. XFT

Ans:– A ,

This data type allows alphanumeric characters and special symbols.
Options: a. text b. memo c. auto number d. None of the above

Ans:dash; a,dash; a

. Which of the following is not an advantage of open source operating system over proprietary version?
Options: a. Free to use and distribution b. Availability of technical support c. Availability of source code d. Ability to modify code

Ans:4 – b ,4 – b

Which of the following is requirement to develop a successful management information system?
Options: a staff of technical specialists with the skills necessary to develop the computer based parts of the system,    the development of a short-range goal for the system,    the development of a long-range goal for the system,    a commitment from management to allocate the personnel and resources necessary to get the job done

Ans:E ,E

The conditions immediately outside a system is called
Options: The boundary,    The interface,    The environment,    The protocols

Ans:C ,C

A regular subquery can be processed:
Options: from the top down.,    from the bottom up.,    by nesting.,    None of the above is correct.

Ans:B ,B

. If you hard disk is partitioned into 3 drives, the number of recycle bin for that hard disk is
Options: a. 1 b. 2 c. 3 d. 4

Ans:2 – c ,2 – c

When you are testing a fuse, you should set the Volt-OHM meter to what scale?
Options: AC,    DC,    AMPS,    OHMS

Ans:D ,D

. Microsoft Windows7 is not possible to installed on FAT32 Disk Format.
Options: True B. False

Ans:– A ,

What will you do to treat the constant 3.14 as a long double?
Options: use 3.14LD,    use 3.14L,    use 3.14DL,    use 3.14LF

Ans:B ,B

A T-switch is used to
Options: control how messages are passed between computers,    echo every character that is received,    transmit characters one at a time,    rearrange the connections between computing equipment

Ans:D ,D

What is the shortcut key to “Undo ” the last action in a document?
Options: Ctrl + X B. Ctrl + Y      C. Ctrl + Z D. None of above

Ans:– C ,

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

Ans:6 – c ,6 – c

. What is the use of Researching Timings?
Options: a. This option allows you to rearrange slides b. This option allows you to set the time of animations c. This option allows you to rehearsal of slide presentation d. There is no such option in PowerPoint

Ans:5 – B ,5 – B

. A search value can be an exact value or it can be
Options: a. Logical operator b. Relationship c. Wild card character d. Comparison operation

Ans:8 – c ,8 – c

. How many types of storage loops exists in magnetic bubble memory
Options: A) 8 B) 4 C) 16 D) 2


. You can activate a cell by
Options: a. Pressing the Tab key b. Clicking the cell c. Pressing an arrow key d. All of above

Ans:– d,– d

To locate a data item for storage is
Options: Field,    Feed,    Database,    Fetch


Which command-line tool is included with every Microsoft TCP/IP client?
Options: DHCP,    WINS,    PING,    WINIPCFG

Ans:C ,C

Where as a computer mouse moves over the table surface, the trackball is
Options: A) Stationary B) Difficult to move C) Dragged D) Moved in small steps


. Size of the primary memory of a PC ranges between
Options: A) 2KB to 8KB B) 64KB & 256KB C) 256KB & 640KB D) None of these


Conversion of a hexadecimal number 3D16 to binary number is
Options: 1111012,    1100112,    110001102,    1100012

Ans:A ,A

How may valence electrons does a silicon atom have?
Options: 0,    1,    2,    4

Ans:D ,D

The ability to combine name and addresses with a standard document is called _________ 
Options: a. document formatting b. database management c. mail merge d. form letters

Ans:–  C,–  C

ART (Automatic Reasoning Tool) is designed to be used on:
Options: LISP machines,    personal computers,    microcomputers,    All of the above

Ans:A ,A

In phase 1 of the system development life cycle, which of the following aspects are usually analyzed?
Options: outputs,    input (transactions),    controls,    All of the above

Ans:D ,D

What is the frequency range of the IEEE 802.11b standard?
Options: 2.4Gbps,    5Gbps,    2.4GHz,    5GHz

Ans:C ,C

Which of the following is not one of the three ‘Mail Merge Helper’ steps?
Options: a. merge the two files b. create the main document c. set the mailing list parameters d. create the data source

Ans:– C,– C

Portrait and Landscape are
Options: a. Page Orientation b. Paper Size c. Page Layout d. All of above

Ans:– A,– A

A smart solid-state sensor is:
Options: one that integrates both logic and a solid-state sensor into one unit.,    one that has two or three substrates,    not available today,    All of the above

Ans:A ,A

66. A (n) _____is a dot or other symbol positioned at the beginning of a paragraph.
Options: a. bullet b. logo c. cell d. target

Ans:– A ,– A

What command is used to assign only read permission to all three categories of the file'letter'?
Options: chmod u + r, g + r, o - x letter,    chmod ugo = r letter,    chmod a - rw letter,    chmod go + r letter

Ans:B ,B

A hard disk is divided into tracks which are further subdivided into:
Options: clusters,    sectors,    vectors,    heads

Ans:B ,B

Which of the following items is not used in Local Area Networks (LANs)?
Options: Computer,    Modem,    Printer,    Cable

Ans:B ,B

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

Ans:C ,C

What function does a serial interface perform in data communication?
Options: Converts serial data into audio signals,    Converts analog signals into digital signals,    Converts parallel data into a stream of bits,    Decodes incoming signals into computer data

Ans:C ,C

What does DMA stand for?
Options: Distinct Memory Access B. Direct Memory Access C. Direct Module Access D. Direct Memory Allocation

Ans:– B ,

. Which of the following is best for quick copy operation?
Options: Copy and Paste B. Windows Clipboard C. Drag and Drop D. Auto Text

Ans: – C ,

Consider the following program and what will be content of t? #include<stdio.h> int main() { FILE *fp; int t; fp = fopen("DUMMY.C", "w"); t = fileno(fp); printf("%d\n", t); return 0; }
Options: size of "DUMMY.C" file,    The handle associated with "DUMMY.C" file,    Garbage value,    Error in fileno()

Ans:B ,B

14. Which command in DOS can be used to recover accidentally deleted files?

Ans:Correct Answer: a ,Correct Answer: a

Which command is used to establish a link between a source document and a destination document?
Options: Tools, Link, Documents B. Tools, Link C. Edit, Link D. Edit, Paste Special

Ans:– D ,