Piece of code that only one thread can execute at a time is called


Options: Mutual Exclusion B. Critical Section C. Synchronization D. All of them

Ans:– B ,


Description: mcqquestions






More Operating System Related questions:


Changes to the data base are made only with
Options: proper departmental security codes,    proper individual passwords,    both (a) and (b),    neither (a) nor (b)

Ans:C ,C


. A utility that can be used to minimize the number of fragmented files and enhance the speed
Options: a. Disk space b. Defrag c. Scandisk d. Double space

Ans:4 – b ,4 – b


The most popular language used with microcomputers and time-shared mini computers, is an easy-to-use high level language.
Options: COBOL,    ADA,    PASCAL,    BASIC

Ans:D ,D


. Which of the following is the most commonly used encoding standard of Unicode?
Options: UTF-6 B. UTF-7 C. UTF-8 D. UTF-9

Ans:– C ,


_____ assist traditional auditors both in the review of computer controls and in the production of audit information through the use of computers.
Options: CDP,    CISA,    DPMA,    EDP auditor

Ans:D ,D


40. When the same word is used in multiple locations or a word is used that was not quite appropriate, a thesaurus can be used to look up a (n) _____ or a word similar in meaning.
Options: a. synonym b. homonym c. antonym d. metronym

Ans:– A ,– A


What will be the output of the program in 16-bit platform (under DOS)? #include<stdio.h> int main() { struct node { int data; struct node *link; }; struct node *p, *q; p = (struct node *) malloc(sizeof(struct node)); q = (struct node *) malloc(sizeof(struct node)); printf("%d, %d\n", sizeof(p), sizeof(q)); return 0; }
Options: 2, 2,    8, 8,    5, 5,    4, 4

Ans:A ,A


. The .... displays the name of every computer user on the computer
Options: a. Wish list screen b. Command screen c.Welcome screen d. None of the above

Ans: c, c


In the language of the computer profession, one thousand position of main storage is represented with the letter
Options: K,    L,    M,    C

Ans:A ,A


In SQL, which command(s) is(are) used to redefine an index's future storage allocation
Options: ALTER INDEX,    REDEFINE INDEX,    MODIFY INDEX,    DO INDEX

Ans:A ,A


. Which part of the IIF expression is the action performed if the true condition exists?
Options: a. inner b. first c. second d. third

Ans:3 – c ,3 – c


What IRQ is used for COM 2?
Options: 4,    3,    2,    1

Ans:B ,B


. Which of the following file menu option saves document to disk?
Options: a. Save b. Create c. Rename d. All of above

Ans:5 – a ,5 – a


The packets switching concept was first proposed
Options: in the late 1980s for the Defense Ministry of US.,    in the early 1960s for military communication systems, mainly to handle speech,    in the late 1950s for Defense Ministry of US,    All of the above

Ans:B ,B


How do you display current date and time in MS Excel?
Options: date () B. Today () C. now () D. time ()

Ans:– C ,


Which command is used to display the subdirectory structure of the currently logged drive and pause the screen display after each screenful of information?
Options: TREE,    DELTREE/F,    DIR | MORE,    TREE | MORE

Ans:D ,D


A thermistor:
Options: is a pressure sensing device,    has a voltage output,    measures temperature,    All of the above

Ans:C ,C


A _____ is a formalized computer information system that can integrate data from various sources to provide the information necessary for management decision making.
Options: prompt,    passwords,    MIS,    Tactical

Ans:C ,C


. Circular division of disks to store and retrieve data are known as

Options: A) tracks B) sectors C) cycles D) rings

Ans:A,A


Assembly languages are most commonly used to write computing systems that provide
Options: supervisory information,    priority setting information,    planning information,    All of the above

Ans:A ,A


Which command is used to send the contents of file named REPORT/TXT to the standard printing device?
Options: TYPE REPORT.TXT TO PRINTER,    TYPE REPORT.TXT > PRN,    TYPE REPORT.TXT | PRN,    TYPE REPORT.TXT | PRINTER

Ans:B ,B


Which of the following is not a basic step in creating a worksheet?
Options: a. Save workbook b. Modifiy the worksheet c. Enter text and data d. Copy the worksheet

Ans:8211; d,8211; d


System generation:
Options: is always quite simple,    is always very difficult,    varies in difficulty between systems,    requires extensive tools to be understandable

Ans:C ,C


A semijoin is which of the following?
Options: Only the joining attributes are sent from one site to another and then all of the rows are returned.,    All of the attributes are sent from one site to another and then only the required rows are returned.,    Only the joining attributes are sent from one site to another and then only the required rows are returned.,    All of the attributes are sent from one site to another and then only the required rows are returned.

Ans:C ,C


. Which is not consisted in a processor
Options: A) ALU B) CU C) Memory D) Registers

Ans:C,C


. What is an expression that tells how the numbers in a determined set of cells are to be calculated?
Options: a. Formula b. Field c. Data d. Query

Ans:A,– a


A form defines
Options: where data is placed on the screen,    the width of each field,    both (a) and (b),    All of the above

Ans:C ,C


Which of the following is not currently a topic in computer science?
Options: Speech recognition,    Artificial intelligence,    Thermodynamics,    Multiprocessing

Ans:C,C


A rule of thumb for choosing indexes for a relational database includes which of the following?
Options: Indexes are more useful on smaller tables.,    Indexes are more useful for columns that do not appear frequently in the WHERE clause in queries.,    Do not specify a unique index for the primary key of each table.,    Be careful indexing attributes that have null values.

Ans:D ,D


Inventory lead time can be broken into:
Options: review, order, manufacturing or purchasing and receiving,    order, manufacturing or purchasing, and receiving,    order, receiving,    All of the above

Ans:A ,A


The general type of process found in industry is:
Options: discrete parts,    continuous,    batch,    All of the above

Ans:D ,D


Which of the following is used to check for errors in RAM chips?
Options: ROM chip,    Microprocessor chip,    Parity chip,    EPROM chip

Ans:C ,C


. When typing in Preeti font all the Ukars turn to something else? What’s the cause?
Options: a. Autotext b. Autocorrect c. Speller d. Preeti font does not work with Word

Ans:– B,– B


. The ….is a temporary storage area in memory where you can attach text or graphics information
Options: a. Clipboard b. Copyboard c. Both a and b d. None of above

Ans:3 – a ,3 – a


Creating a read-only database is a task that is ________ assigned to beginning database professionals.
Options: always,    commonly,    seldom,    never

Ans:B ,B


In a synchronous modem, the receive equalizer is known as
Options: adaptive equalizer,    impairment equalizer,    statistical equalizer,    compromise equalizer

Ans:A ,A


How much space in minimum must be provided between columns?
Options:  A) 0", B) 0.5", C) 1", D) 1.5", 

Ans:-A,-A


Which of the following would not be a major deliverable of the structured systems analysis phase.
Options: data dictionaries,    data flow diagrams,    entity relationship diagrams,    prototype model

Ans:D ,D


What service is not monitored by inetd ?
Options: SSH,    time,    ntalk,    finger

Ans:A ,A


A system must be composed of more than one
Options: subsystem,    element,    super system,    All of the above

Ans:B ,B


. A computer programmer
Options: A) Does all the thinking for a computer B) Can enter input data quickly C) Can operate all types of computer equipments D) Can draw only flowchart

Ans:A,A


Can you name of the major Operating System used in computers?
Options: MS DOS,    OS/2,    UNIX,    All of the above

Ans:D ,D


. What is the path from which data flow in a computer system is knon as
Options: A) Car B) Bus C) Truck D) Road

Ans:9-B,9-B


Which of the following software types is used to simplify using systems software?
Options: spreadsheet,    operating environment,    timesharing,    multitasking

Ans:C ,C


. Which of the following is a correct association between a vendor and an operating system
Options: a. Redhat Linux b. Microsoft Unix c. AT & T DOS d. Novell Linux

Ans:0 – a ,0 – a


LISP machines also are known as:
Options: AI workstations,    time-sharing terminals,    super mini computers,    All of the above

Ans:A ,A


Fork is
Options: the dispatching of a task,    the creation of a new job,    the creation of a new process,    increasing the priority of a task

Ans:C ,C


The _____, or typeface, defines the appearance and shape of letters, numbers, and special characters.
Options: a. font b. font size c. point d. paragraph formatting

Ans:– A,– A


To run a compiled Java program, the machine must have what loaded and running?
Options: Java virtual machine,    Java compiler,    Java bytecode,    A Web browser

Ans:A ,A


How will you free the allocated memory ?
Options: remove(var-name);,    free(var-name);,    delete(var-name);,    dalloc(var-name);

Ans:B ,B

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