How many layers does OSI Reference Model has?


Options:  4 B.  5 C.  6 D.  7

Ans:– D ,






More Computer Networks Related questions:


. What is the quickest way to select entire worksheet?
Options: Choose Edit -> Select all from the Menu B. Click on the first column, press Ctrl, and then click on the last column C. Click on the first column, press Shift, and then click on the last column D. Click on the rectangle box on the upper left corner where column headings and row headings meet

Ans:– D ,


What key hardware item ties a CAD/ CAM system together?
Options: Mouse,    Graphics workstation,    Digitizer,    Plotter

Ans:B ,B


What will be the output of the program ? #include<stdio.h> void fun(int **p); int main() { int a[3][4] = {1, 2, 3, 4, 4, 3, 2, 8, 7, 8, 9, 0}; int *ptr; ptr = &a[0][0]; fun(&ptr); return 0; } void fun(int **p) { printf("%d\n", **p); }
Options: 1,    2,    3,    4

Ans:A ,A


The step-by-step instructions that solve a problem are called _____.
Options: An algorithm,    A list,    A plan,    A sequential structure

Ans:A ,A


What is the highest binary number that can be referred to on a three position jumper block?
Options: 4,    6,    F,    1

Ans:D ,D


In a network with dozens of switches, how many root bridges would you have?
Options: 1,    2,    5,    12

Ans:A ,A


In an experiment in which a new drug was being tested on 1000 rats, which one of the following would a computer be least able to do?
Options: determine the total amount of drug that had been given to all 1000 rats keep records of weight changes of the 1000 rats,    keep records of the dosages and the dates the drug was given to each rat,    determine the total dosage that had been given to each rat,    keep records of weight changes of the 1000 rates

Ans:E ,E


. Which device is used to backup the data?
Options: A) Floppy Disk B) Tape C) Network Drive D) All of the above

Ans:D,D


Websites without a database attached to them have which of the following characteristics?
Options: The ability to generate data via SQL.,    The inability to use a browser to display Web pages.,    Static information using HTML or JavaScript.,    The need to use TCP/IP as the network protocol.

Ans:C ,C


ON UPDATE CASCADE ensures which of the following?
Options: Normalization,    Data Integrity,    Materialized Views,    All of the above.

Ans:B ,B


Physical connection between Microprocessor Memory and other parts is called _________
Options: A. Path B. Hub C. Address bus D. None of the above

Ans:C,


Which of the following is not a level of data abstraction?
Options: Physical Level B. Critical Level       C. Logical Level D. View Level

Ans:– B ,


Which command is used to delete the directory and all its contents in one step?
Options: DEL *.*,    RD,    DELTREE,    CD

Ans:C ,C


A device that stores one item of information is
Options: Memory element,    Block Compaction,    MDR,    Memory guard

Ans:A ,A


. Line spacing refers to
Options: a. The space between the lines of text b. The height of the line c. The length of the line d. a and c

Ans:6 – A ,6 – A


  A function inside another function is called _______
Options: Nested function B. Round function C. Sum function D. Text function

Ans:– A ,


You telnet into a remote device and type debug ip rip, but no output from the debug command is seen. What could the problem be?
Options: You must type the show ip rip command first.,    IP addressing on the network is incorrect.,    You must use the terminal monitor command.,    Debug output is sent only to the console.

Ans:C ,C


Which of the following is used for serial access storage only?
Options: RAM,    Magnetic tape,    Magnetic disk,    Core memory

Ans:B,B


What is the meaning of Bandwidth in Network?
Options:  Transmission capacity of a communication channels B.  Connected Computers in the Network C.  Class of IP used in Network D.  None of Above

Ans:– A ,


A program that is employed in the development, repair or enhancement of other programs is known as
Options: System software,    Software tool,    Applications program,    Utility program

Ans:B ,B


If a sine wave has a frequency of 500 Hz, the period in seconds of the sine wave is:
Options: 5000,    0.003,    0.02,    0.002.

Ans:D ,D


What command do you use to delete a file?
Options: rename,    delete,    rm,    cp

Ans:C ,C


. Which of the following store command to retrieve data from database?
Options: a. Forms b. Reports c. Queries d. Tables

Ans:4 – c ,4 – c


What is modified when changing the system start-up boot sequence?
Options: BIOS/CMOS,    CONFIG.SYS,    autoexec.bat,    COMMAND.COM

Ans:A ,A


A devices that links two homogeneous packet-broadcast local networks, is
Options: hub,    bridge,    repeater,    gateway

Ans:B ,B


The total impedance of a series RLC circuit:
Options: is minimum at the resonant frequency,    always increases as the applied frequency increases,    always decreases as the applied frequency increases,    is maximum at the resonant frequency

Ans:A ,A


A command that lets you change one or more fields in a record is
Options: a. insert b. modify c. lookup d. none of above 

Ans:.b,.b


. Which criteria return only those addresses beginning with the letter “K”?
Options: a. address = “K” b. address = “K*” c. address = “K?” d. address = “K#”

Ans:– b,– b


A subquery in an SQL SELECT statement is enclosed in:
Options: braces -- {...}.,    CAPITAL LETTERS.,    parenthesis -- (...) .,    brackets -- [...].

Ans:C ,C


Which of the following is not a communication command.
Options: write,    mesg,    mail,    grep

Ans:D ,D


A consideration evaluated by management when planning to convert to a computer system is :
Options: maintenance,    available software,    CPU sized speed,    All of the above

Ans:D ,D


What is a negative ion?
Options: An atom that contains more electrons than neutrons,    An atom that contains more protons than neutrons,    An atom that contains more electrons than protons,    An atom that contains more protons than electrons

Ans:C ,C


“Ctrl + Up Arrow” is used to
Options: a. Moves the cursor one page up b. Moves the cursor one line up c. Moves the cursor one screen up d. Moves the cursor one paragraph up

Ans:–  D,–  D


With a dot matrix printer, light then dark print is most commonly caused by:
Options: Erratic paper advancement,    Erratic ribbon advancement,    Misalligned print head,    Overheating print head

Ans:B ,B


When setting up Frame Relay for point-to-point subinterfaces, which of the following must not be configured?
Options: The Frame Relay encapsulation on the physical interface,    The local DLCI on each subinterface,    An IP address on the physical interface,    The subinterface type as point-to-point

Ans:C ,C


Conversion of binary number 1010101000010111 to hexadecimal number is
Options: D8F916,    A8B916,    AA1716,    D9F816

Ans:C ,C


. A real time operating system is most likely to be used for which of the following task?
Options: a. Controlling access to a shared printer in a network b. Ensuring that system clock works correctly on server c. Managing the access to system files in a laptop computers d. Controlling the fuel injection system of an automobile engines

Ans:1 – d ,1 – d


. Intel corporation produces chips for which computers?
Options: A) IBM PCs B) Apple/Macintosh PCs C) Both of above D) None of above

Ans:A,A


What is the shortcut key for “Subscript ” the selected text?
Options: Ctrl + = B. Ctrl + – C. Ctrl + Shift + = D. Ctrl + Shift + –

Ans: – A ,


The program execution time:
Options: must be slower than the fastest mechanical operation that is to be controlled,    will vary depending on the language used,    cannot be changed once the program is written,    All of the above

Ans:B ,B


The accident file is commonly updated in the
Options: accident and claims data system,    payroll system,    employment control reporting system,    personnel activity reporting system

Ans:A ,A


Which command is used to display and create files?
Options: cat,    vi,    ed,    lyrix

Ans:A ,A


. An output device that uses words or messages recorded on a magnetic medium to produce audio response is
Options: A) Magnetic tape B) Voice response unit C) Voice recognition unit D) Voice band

Ans:B,B


A feasibility study
Options: includes a statement of the problems,    considers a single solutions,    both (a) and (b),    a list of alternative solution considered

Ans:A ,A


Exceptions to the 8085 microprocessor normal operation are called:
Options: jump instructions,    decoding,    interrupts,    jump instructions or interrupts

Ans:D ,D


. Today’s computer giant IBM was earlier known by different name which was changed in 1924. What was that name?
Options: A) Computer Tabulating Recording Co. B) The Tabulator Ltd. C) International Computer Ltd. D) None of above

Ans:A,A


A six - digit card field used for postal ZIP codes is defined as
Options: A letter field,    An alphabetic field,    A numeric field,    An alphanumeric field

Ans:C ,C


. The three parts of an IIF function are separated by _____.
Options: a. dashes b. asterisks c. semicolons d. commas

Ans:8 – d ,8 – d


The primary memory of a personal computer consists of:
Options: ROM only,    RAM only,    Both ROM and RAM,    Memory module

Ans:C ,C


. Which of the following are the two main components of the CPU?
Options: A) Control Unit and Registers B) Registers and Main Memory C) Control unit and ALU D) ALU and bus

Ans:C,C

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