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100 questions with answersProvisional keyMedium of Question:    ENGLISH

Jr Instrctor(Information Communication Technology System Maintenance) - Industrial Training question paper 2019

Medium of Question:    ENGLISH

Date of test
31/12/2019
Question paper code
61/2019/OL
Questions
100
Answer key
Provisional Answer Key
Exam mode
Online (computer based)

Provisional key. Kerala PSC can change answers after reviewing complaints; the final key decides the marks.

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Source: Kerala PSC (keralapsc.gov.in) · official document· Last updated 25 Sept 2026· How we check content

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As published by the Kerala Public Service Commission.

All 100 questions with answers

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  1. 1.
    What are the active devices of I generation computer
    Show answer and explanation
    Answer: A —
    Vacuum tubes
    First generation computers used vacuum tubes for circuitry and magnetic drums for memory.
    Report a mistake
  2. 2.
    Which of the following is not a language translator
    Show answer and explanation
    Answer: D —
    Application
    Assemblers, interpreters, and compilers are language translators, whereas an application is software that performs specific tasks.
    Report a mistake
  3. 3.
    1 Kilobyte = _____ bits
    Show answer and explanation
    Answer: A —
    8 bits
    The question was cancelled in the final answer key.
    Report a mistake
  4. 4.
    Which one of the following is a volatile memory?
    Show answer and explanation
    Answer: B —
    RAM
    RAM (Random Access Memory) is volatile, meaning it loses its data when power is turned off.
    Report a mistake
  5. 5.
    Which of the following is an extension of image file?
    Show answer and explanation
    Answer: C —
    jpeg
    JPEG is a commonly used method of lossy compression for digital images.
    Report a mistake
  6. 6.
    The term "Pentium" relates to
    Show answer and explanation
    Answer: B —
    Microprocessor
    Pentium is a brand name for a series of x86-compatible microprocessors developed by Intel.
    Report a mistake
  7. 7.
    Which of the following is not a flavor of Linux?
    Show answer and explanation
    Answer: D —
    OS/2
    OS/2 is a separate operating system originally developed by Microsoft and IBM, not a Linux distribution.
    Report a mistake
  8. 8.
    Which of the following is used to keep a process running in background even after the user logout from shell?
    Show answer and explanation
    Answer: D —
    nohup
    The nohup command in Unix/Linux allows a command to continue running after the user logs out.
    Report a mistake
  9. 9.
    On successful execution, fork returns _____ to parent process
    Show answer and explanation
    Answer: C —
    Child process id
    The fork() system call returns the process ID of the newly created child process to the parent.
    Report a mistake
  10. 10.
    Which of the following is used to display the content of a file in octal format?
    Show answer and explanation
    Answer: C —
    od
    The od (octal dump) command is used to display file contents in octal or other formats.
    Report a mistake
  11. 11.
    What will be the output of the program? #include <stdio.h> main() { float b=5, h=2, a; a = 1/2 * b * h; printf("%f",a); }
    Show answer and explanation
    Answer: D —
    0.000000
    In C, 1/2 performs integer division resulting in 0. Thus, 0 * 5 * 2 = 0.
    Report a mistake
  12. 12.
    Default return type of a function is
    Show answer and explanation
    Answer: C —
    int
    In C, if no return type is specified, the compiler assumes the return type to be int.
    Report a mistake
  13. 13.
    Which of the following is the last character of a string
    Show answer and explanation
    Answer: A —
    \0
    C strings are null-terminated, meaning the last character is the null character '\0'.
    Report a mistake
  14. 14.
    Name of an array returns _____
    Show answer and explanation
    Answer: D —
    Base address of the array
    In C, the name of an array acts as a pointer to its first element, representing the base address.
    Report a mistake
  15. 15.
    What will be the output of the following program segment? #include <stdio.h> main() { int i; for (i = 3; i <5; i++); printf("%d",i); }
    Show answer and explanation
    Answer: B —
    5
    The semicolon after the for loop makes it an empty loop that increments i until it reaches 5.
    Report a mistake
  16. 16.
    What will be the output of the following program segment #include <stdio.h> main() { int z, x = 4, y = -10, a=4, b=2; z = x++ - --y*b/a; printf(%d",z); }
    Show answer and explanation
    Answer: D —
    9
    Calculation: x=4, y=-11. z = 4 - (-11 * 2 / 4) = 4 - (-22 / 4) = 4 - (-5) = 9.
    Report a mistake
  17. 17.
    What will be the output? main() { union stud { char name [10]; int regno; int mark1; int mark2; } st; printf("%d",sizeof(st));
    Show answer and explanation
    Answer: D —
    10
    The size of a union is the size of its largest member. Here, char name[10] is 10 bytes, while integers are typically 2 or 4 bytes, making 10 the largest.
    Report a mistake
  18. 18.
    What is the return value of malloc()?
    Show answer and explanation
    Answer: B —
    base address of the allocated memory
    malloc() allocates a block of memory and returns a void pointer to the first byte of the allocated block.
    Report a mistake
  19. 19.
    Which of the following header file must be included to use dynamic memory allocation functions?
    Show answer and explanation
    Answer: C —
    stdlib.h
    Dynamic memory allocation functions like malloc(), calloc(), and free() are defined in the <stdlib.h> header file.
    Report a mistake
  20. 20.
    What will be the data type returned by the following function? #include<stdio.h> int func() { return (float)(char)8.3; }
    Show answer and explanation
    Answer: A —
    int
    The function return type is declared as int, so the final result will be cast to an integer regardless of internal operations.
    Report a mistake
  21. 21.
    What will be the output of the following program #include<stdio.h> main() { int a=5 * 3 % 6 - 8 + 3; printf("%d",a); }
    Show answer and explanation
    Answer: C —
    -2
    Calculation: (5*3)%6 - 8 + 3 = 15%6 - 8 + 3 = 3 - 8 + 3 = -2.
    Report a mistake
  22. 22.
    Information on basic system configuration is stored in
    Show answer and explanation
    Answer: B —
    CMOS
    CMOS RAM stores the BIOS settings and basic system configuration data.
    Report a mistake
  23. 23.
    Where do PC store CMOS settings?
    Show answer and explanation
    Answer: B —
    Flash ROM
    Modern PCs typically store BIOS/CMOS settings in Flash ROM (or NVRAM).
    Report a mistake
  24. 24.
    How can you remove a CMOS password?
    Show answer and explanation
    Answer: D —
    Remove jumper on the mother board
    Removing the CMOS reset jumper on the motherboard clears the CMOS settings, including the password.
    Report a mistake
  25. 25.
    Power-on self-test checks all of the flowing except
    Show answer and explanation
    Answer: C —
    Modem
    POST checks core components like CPU, RAM, and Video, but not external peripherals like modems.
    Report a mistake
  26. 26.
    Which of the following is a special database that holds key information about your system including the device drivers?
    Show answer and explanation
    Answer: D —
    Registry
    The Windows Registry is a hierarchical database that stores configuration settings and options for the operating system.
    Report a mistake
  27. 27.
    IDE cables have how many pins?
    Show answer and explanation
    Answer: C —
    40
    Standard PATA (IDE) cables use a 40-pin connector.
    Report a mistake
  28. 28.
    Which controller support an external CD drive?
    Show answer and explanation
    Answer: C —
    SCSI
    SCSI controllers were historically used to support external devices like CD drives and scanners.
    Report a mistake
  29. 29.
    Which of the following describes a fragmented hard disk?
    Show answer and explanation
    Answer: D —
    Files are not stored in consecutive clusters
    Fragmentation occurs when files are split into pieces and stored in non-contiguous clusters on the disk.
    Report a mistake
  30. 30.
    A 16 bit address bus can generate _____ addresses.
    Show answer and explanation
    Answer: A —
    65536
    A 16-bit address bus can address 216=655362^{16} = 65536 unique memory locations.
    Report a mistake
  31. 31.
    The size of registers of 8086 microprocessor.
    Show answer and explanation
    Answer: C —
    16 bits
    The 8086 is a 16-bit microprocessor, and its general-purpose registers are 16 bits wide.
    Report a mistake
  32. 32.
    If there is a carry from lowest nibble during addition, _____ flag is set.
    Show answer and explanation
    Answer: C —
    Auxiliary carry
    The Auxiliary Carry flag (AC) is set when there is a carry from the lower nibble (bit 3) to the upper nibble (bit 4).
    Report a mistake
  33. 33.
    The number of address and data lines of 8086
    Show answer and explanation
    Answer: C —
    20 and 16
    The 8086 has a 20-bit address bus (allowing 1MB of memory) and a 16-bit data bus.
    Report a mistake
  34. 34.
    Which directory contains configuration files in linux?
    Show answer and explanation
    Answer: B —
    /etc/
    In the Linux file system hierarchy, the /etc directory is used for system-wide configuration files.
    Report a mistake
  35. 35.
    On successful completion, fork() returns _____ to the parent process.
    Show answer and explanation
    Answer: D —
    Process ID of child process
    The fork() system call returns the child's process ID to the parent and 0 to the child process.
    Report a mistake
  36. 36.
    What will be the output of the following program? ```c static int a = 3; void main() { a = 5; { int a = 7; } printf("%d",a); }```
    Show answer and explanation
    Answer: B —
    5
    The inner 'a' is local to the block, so the global/static 'a' remains 5 after the assignment.
    Report a mistake
  37. 37.
    Default storage class of a variable declaration is _____
    Show answer and explanation
    Answer: A —
    auto
    In C, local variables are 'auto' by default if no other storage class is specified.
    Report a mistake
  38. 38.
    Fast access to data items available in a database file can be provided through
    Show answer and explanation
    Answer: C —
    data dictionary
    A data dictionary contains metadata about the database structure, which helps in efficient data management and access.
    Report a mistake
  39. 39.
    The term _____ is used to refer to a row in a table
    Show answer and explanation
    Answer: C —
    Tuple
    In relational database terminology, a row is referred to as a tuple.
    Report a mistake
  40. 40.
    Which one of the follow is not a RDBMS?
    Show answer and explanation
    Answer: A —
    Foxpro
    FoxPro is generally considered a file-based database management system, whereas Oracle, MySQL, and SQL Server are RDBMS.
    Report a mistake
  41. 41.
    Which one of the following is used to create a virtual relation for storing a query?
    Show answer and explanation
    Answer: A —
    view
    A view is a virtual table based on the result-set of an SQL statement.
    Report a mistake
  42. 42.
    which one of the following option clause is used with view to reject the tuples that do not satisfy the "where condition"?
    Show answer and explanation
    Answer: B —
    with check
    The 'WITH CHECK OPTION' ensures that all updates and inserts satisfy the view's defining condition.
    Report a mistake
  43. 43.
    When using Foreign Key, the _____ of one relation is referenced in another relation
    Show answer and explanation
    Answer: B —
    Primary Key
    A foreign key in one table points to the primary key of another table to establish a relationship.
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  44. 44.
    _____ is the preferred method for enforcing data integrity
    Show answer and explanation
    Answer: A —
    Constraints
    Constraints (like Primary Key, Foreign Key, Unique, Not Null) are the standard way to enforce data integrity.
    Report a mistake
  45. 45.
    What values does the count(*)function ignore?
    Show answer and explanation
    Answer: A —
    null values
    While count(column_name) ignores nulls, count(*) counts all rows including those with nulls in some contexts, but in many SQL implementations, it is used to count total rows.
    Report a mistake
  46. 46.
    The _____ statement is used in SQL for authorization
    Show answer and explanation
    Answer: C —
    grant
    The GRANT statement is used to provide access privileges to users.
    Report a mistake
  47. 47.
    _____ is executed when a table is modified
    Show answer and explanation
    Answer: C —
    trigger
    A trigger is a special type of stored procedure that automatically runs when an event like INSERT, UPDATE, or DELETE occurs.
    Report a mistake
  48. 48.
    Which of the following command is used to delete a particular column in a relation?
    Show answer and explanation
    Answer: B —
    ALTER
    The ALTER TABLE command with DROP COLUMN is used to remove a column from a table.
    Report a mistake
  49. 49.
    A transaction completes its execution is said to be
    Show answer and explanation
    Answer: C —
    Committed
    A transaction that has successfully completed and saved its changes to the database is said to be committed.
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  50. 50.
    The language used in application program to request for data from DBMS is
    Show answer and explanation
    Answer: B —
    DML
    Data Manipulation Language (DML) is used for retrieving, inserting, deleting, and modifying data.
    Report a mistake
  51. 51.
    Which of the following is NOT related to OOP?
    Show answer and explanation
    Answer: D —
    Data Dictionary
    Encapsulation, Abstraction, and Data Hiding are core OOP concepts, while Data Dictionary is a database concept.
    Report a mistake
  52. 52.
    In a class defined using an Object Oriented Programming language:
    Show answer and explanation
    Answer: B —
    Nearly all data should be private and most functions should be public
    Encapsulation principles suggest keeping data private and providing public methods to access it.
    Report a mistake
  53. 53.
    Which among the following is an Object-Oriented Programming language?
    Show answer and explanation
    Answer: D —
    All the above
    Java, Simula 67, and Smalltalk are all object-oriented programming languages.
    Report a mistake
  54. 54.
    _____ are the basic run times entities in an object-oriented system.
    Show answer and explanation
    Answer: A —
    Objects
    Objects are the basic runtime entities in any object-oriented programming system.
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  55. 55.
    Operator Overloading
    Show answer and explanation
    Answer: D —
    All of the above
    Operator overloading gives existing operators custom meanings for user-defined types, implementing compile-time polymorphism.
    Report a mistake
  56. 56.
    Virtual function in C++ implements _____
    Show answer and explanation
    Answer: B —
    Polymorphism
    Virtual functions implement runtime (dynamic) polymorphism in C++.
    Report a mistake
  57. 57.
    Multiple inheritance can be achieved in Java using _____
    Show answer and explanation
    Answer: C —
    Interface
    Java does not support multiple inheritance with classes, but it is achieved using interfaces.
    Report a mistake
  58. 58.
    Which of the following statements is TRUE about constructors?
    Show answer and explanation
    Answer: D —
    Both (A) and (B)
    Constructors are called automatically upon object creation and can be overloaded, but they have no return type.
    Report a mistake
  59. 59.
    Wrapping up of data and associated functions into one single unit is called
    Show answer and explanation
    Answer: B —
    Encapsulation
    Encapsulation is the mechanism of wrapping data and methods into a single unit.
    Report a mistake
  60. 60.
    Which among the following OOP feature promotes code reusability?
    Show answer and explanation
    Answer: C —
    Inheritance
    Inheritance allows new classes to adopt properties and behaviors of existing classes, promoting code reusability.
    Report a mistake
  61. 61.
    Private members of a class are accessible to:
    Show answer and explanation
    Answer: D —
    Both (A) and (B)
    Member functions and friend functions have access to private members of a class.
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  62. 62.
    A class which is not used to create objects, but is designed to act as a base class to be inherited by other classes is called:
    Show answer and explanation
    Answer: A —
    Abstract class
    An abstract class cannot be instantiated directly and serves as a base for other classes.
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  63. 63.
    Which of the following programs in UNIX helps us to configure a machine as a proxy server?
    Show answer and explanation
    Answer: D —
    Squid
    Squid is a widely used caching proxy for web clients.
    Report a mistake
  64. 64.
    The maximum number of class A networks possible according to the IPv4 addressing scheme is:
    Show answer and explanation
    Answer: C —
    126
    Class A uses 7 bits for the network ID (27=1282^7 = 128), but 0.0.0.0 and 127.0.0.0 are reserved, leaving 126 networks.
    Report a mistake
  65. 65.
    172.0.14.87 is a Class _____ address
    Show answer and explanation
    Answer: B —
    Class B
    Class B IP addresses range from 128.0.0.0 to 191.255.255.255. Thus, 172.0.14.87 is Class B.
    Report a mistake
  66. 66.
    In IPv6 address is a _____ bit address
    Show answer and explanation
    Answer: C —
    128
    IPv6 addresses are 128 bits long.
    Report a mistake
  67. 67.
    How fast can CAT 6 cable transfer data?
    Show answer and explanation
    Answer: D —
    Upto 10 Gbps
    CAT 6 cables support data transfer speeds up to 10 Gbps (for limited distances up to 55 meters).
    Report a mistake
  68. 68.
    The number of half duplex links required to connect five computers in mesh topology is:
    Show answer and explanation
    Answer: B —
    20
    In a full mesh topology, the number of links is n(n−1)2\frac{n(n-1)}{2} for simplex/undirected connections, and for directional/half-duplex links it is n(n−1)=5×4=20n(n-1) = 5 \times 4 = 20.
    Report a mistake
  69. 69.
    A network device that connects dissimilar networks by providing the translation from one set of protocols to another is:
    Show answer and explanation
    Answer: C —
    Gateway
    A gateway operates at higher layers to translate protocols between dissimilar networks.
    Report a mistake
  70. 70.
    Which among the following protocols is used for translating from IP address to MAC address?
    Show answer and explanation
    Answer: B —
    ARP
    Address Resolution Protocol (ARP) resolves IP addresses to MAC addresses.
    Report a mistake
  71. 71.
    The input and output ports of a router perform the _____ layer functions:
    Show answer and explanation
    Answer: A —
    Physical and Data link
    Input and output ports of routers handle Physical and Data link layer protocols.
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  72. 72.
    Transport Layer is responsible for _____ delivery of data:
    Show answer and explanation
    Answer: B —
    Process to process
    The transport layer provides end-to-end (process-to-process) communication services.
    Report a mistake
  73. 73.
    A firewall is used in a network to:
    Show answer and explanation
    Answer: C —
    Prevent unauthorized access to the network
    Firewalls monitor and control incoming and outgoing network traffic based on security rules.
    Report a mistake
  74. 74.
    The maximum number of active devices in a Piconet is:
    Show answer and explanation
    Answer: D —
    8
    A Bluetooth piconet consists of 1 primary and up to 7 active secondary devices, making 8 active devices in total.
    Report a mistake
  75. 75.
    Which of the following is a private network?
    Show answer and explanation
    Answer: A —
    LAN
    A Local Area Network (LAN) is typically privately owned and operated.
    Report a mistake
  76. 76.
    The IEEE standard for Wireless LAN is:
    Show answer and explanation
    Answer: C —
    IEEE 802.11
    IEEE 802.11 is the standard set of specifications for wireless local area network (WLAN) communications.
    Report a mistake
  77. 77.
    A protocol that allows non-ASCII messages to be sent through e-mails:
    Show answer and explanation
    Answer: A —
    MIME
    MIME (Multipurpose Internet Mail Extensions) extends email formats to support non-ASCII text and attachments.
    Report a mistake
  78. 78.
    A sniffer is
    Show answer and explanation
    Answer: C —
    A program that monitors and analyzes network traffic
    A packet sniffer is a tool that monitors and logs traffic passing over a computer network.
    Report a mistake
  79. 79.
    Providing, managing and maintaining hardware, software, content integrity, security and reliable high speed connection for a website is called:
    Show answer and explanation
    Answer: A —
    Web hosting
    Web hosting service provides the infrastructure and technologies required for websites to be viewed on the Internet.
    Report a mistake
  80. 80.
    The system that helps users to identify host computers in a network by their names instead of their IP addresses is:
    Show answer and explanation
    Answer: B —
    DNS
    The Domain Name System (DNS) translates human-friendly domain names to numerical IP addresses.
    Report a mistake
  81. 81.
    A computer virus that copies itself to the beginning of the hard disk, where it is automatically executed when the system is turned ON is called _____
    Show answer and explanation
    Answer: C —
    Boot sector virus
    A boot sector virus infects the master boot record or boot sector of storage devices.
    Report a mistake
  82. 82.
    What is a trap door in a program?
    Show answer and explanation
    Answer: A —
    A security hole inserted while writing the program, which is intended for later use
    A trapdoor (or backdoor) is a secret entry point into a program bypassing normal authentication.
    Report a mistake
  83. 83.
    Honeypot is an example for
    Show answer and explanation
    Answer: B —
    Intrusion detection software
    A honeypot is a decoy system designed to attract and detect cyber attacks and intrusions.
    Report a mistake
  84. 84.
    Which feature of cloud computing allows the service to change in size or volume in order to meet user's needs?
    Show answer and explanation
    Answer: A —
    Scalability
    Scalability refers to the ability of cloud systems to dynamically scale resources up or down.
    Report a mistake
  85. 85.
    DoS is the acronym for
    Show answer and explanation
    Answer: C —
    Denial of Service
    DoS stands for Denial of Service attack.
    Report a mistake
  86. 86.
    Which among the following is NOT a web browser?
    Show answer and explanation
    Answer: D —
    None of the above
    Edge, Chrome, and Firefox are all popular web browsers.
    Report a mistake
  87. 87.
    URL stands for _____
    Show answer and explanation
    Answer: B —
    Uniform Resource Locator
    URL stands for Uniform Resource Locator.
    Report a mistake
  88. 88.
    What should be the first tag in any HTML document?
    Show answer and explanation
    Answer: D —
    <html>
    The <html> element is the root element of an HTML page and typically the first tag after doctype.
    Report a mistake
  89. 89.
    Domain names used by commercial establishments usually have the suffix _____
    Show answer and explanation
    Answer: A —
    .com
    .com stands for commercial and is used by commercial entities.
    Report a mistake
  90. 90.
    Choose the correct HTML tag to make the text bold:
    Show answer and explanation
    Answer: D —
    Both (A) and (B)
    Both <b> and <strong> (and historically <bold> in some non-standard parsers) relate to making text bold.
    Report a mistake
  91. 91.
    Marquee is a tag in HTML used to:
    Show answer and explanation
    Answer: C —
    Display text with scrolling effect
    The <marquee> tag is used to create scrolling text on a web page.
    Report a mistake
  92. 92.
    CSS is an acronym for
    Show answer and explanation
    Answer: A —
    Cascading Style Sheet
    CSS stands for Cascading Style Sheets.
    Report a mistake
  93. 93.
    Which of the following statements is TRUE about JavaScript?
    Show answer and explanation
    Answer: B —
    JavaScript is designed to add interactivity to HTML pages
    JavaScript is a scripting language used to create dynamic and interactive web pages.
    Report a mistake
  94. 94.
    _____ is a built-in JavaScript function which can be used to execute another function after a given time interval.
    Show answer and explanation
    Answer: C —
    setTimeout( )
    setTimeout() is used to call a function after a specified number of milliseconds.
    Report a mistake
  95. 95.
    A dynamic web page is
    Show answer and explanation
    Answer: B —
    Generated on demand by a program on a request from browser
    Dynamic web pages change content based on user requests, time, or inputs, generated on the fly.
    Report a mistake
  96. 96.
    Which of the following is NOT TRUE about PHP?
    Show answer and explanation
    Answer: D —
    PHP cannot be embedded into HTML
    PHP code can be easily embedded directly into HTML files.
    Report a mistake
  97. 97.
    PHP scripts are enclosed with _____
    Show answer and explanation
    Answer: B —
    <?php...?>
    PHP code blocks are enclosed within the standard tags <?php and ?>.
    Report a mistake
  98. 98.
    Which of the following is the correct statement to create an array in PHP? (i) state[0] = "Kerala"; (ii) $state[ ] = array("Kerala"); (iii) $state[0] = "Kerala"; (iv) $state = array("Kerala");
    Show answer and explanation
    Answer: A —
    (iii) and (iv)
    Variables in PHP start with '′.Thus,'. Thus,state[0] = "Kerala" and $state = array("Kerala") are correct syntax.
    Report a mistake
  99. 99.
    Which one of the following PHP functions allow user-defined functions to accept variable length argument lists?
    Show answer and explanation
    Answer: B —
    func_get_args()
    func_get_args() returns an array comprising a function's argument list.
    Report a mistake
  100. 100.
    _____ is the concatenation operator in PHP
    Show answer and explanation
    Answer: A —
    .(dot)
    The dot (.) operator is used for string concatenation in PHP.
    Report a mistake

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