{"id":15458,"date":"2019-12-27T13:57:35","date_gmt":"2019-12-27T08:27:35","guid":{"rendered":"https:\/\/kseebsolutions.guru\/?p=15458"},"modified":"2021-07-02T15:34:57","modified_gmt":"2021-07-02T10:04:57","slug":"2nd-puc-computer-science-previous-year-question-paper-june-2015","status":"publish","type":"post","link":"https:\/\/kseebsolutions.guru\/2nd-puc-computer-science-previous-year-question-paper-june-2015\/","title":{"rendered":"2nd PUC Computer Science Previous Year Question Paper June 2015"},"content":{"rendered":"

Students can Download 2nd PUC Computer Science Previous Year Question Paper June 2015, Karnataka 2nd PUC Computer Science Model Question Papers with Answers<\/a> helps you to revise the complete Karnataka State Board Syllabus and score more marks in your examinations.<\/p>\n

Karnataka 2nd PUC Computer Science Previous Year Question Paper June 2015<\/h2>\n

Time: 3 Hrs 15 Min
\nMax. Marks: 100<\/p>\n

PART – A<\/p>\n

Answer all the following questions. Each question carries one mark. (10 \u00d7 1 = 10)<\/span><\/p>\n

Question 1.
\nWhat is a motherboard?
\nAnswer:
\nThe motherboard is a large printed circuit board and every physical unit is connected to it. It is the main circuit board of computer system.<\/p>\n

Question 2.
\nWhat is a logic gate?
\nAnswer:
\nIt is an electronic circuit having one or more than one input and only one output.<\/p>\n

Question 3.
\nGive an example for linear data structure.
\nAnswer:
\nThe examples for linear data structures are stack, queues and linked lists.<\/p>\n

\"KSEEB<\/p>\n

Question 4.
\nWhat is a class?
\nAnswer:
\nA class is a structured data type in C++ which is a collection of variables and functions.<\/p>\n

Question 5.
\nMention any one advantage of pointers.
\nAnswer:
\nThe advantage of pointer is memory can be allocated or deallocated dynamically.<\/p>\n

Question 6.
\nWhat is a database?
\nAnswer:
\nA database is a collection of large amount of related data. In other words, It is a collection of database tables.<\/p>\n

Question 7.
\nExpand URL.
\nAnswer:
\nUniform Resource Locator.<\/p>\n

\"KSEEB<\/p>\n

Question 8.
\nDefine bus topology.
\nAnswer:
\nA bus topology consists of a central cable with a terminator at each end. All nodes (file server, workstations, and peripherals) are connected to the linear cable.<\/p>\n

Question 9.
\nName any one web browser.
\nAnswer:
\nThe name of a web browser is Google Chrome<\/p>\n

Question 10.
\nWrite any one HTML tag.
\nAnswer:
\nHTML tag :<\/p>\n

PART-B<\/p>\n

Answer any five questions. Each question carries two marks. (5 \u00d7 2 = 10)<\/span><\/p>\n

Question 11.
\nState and prove involution law.
\nAnswer:
\nThis law states that the double complement of a variable gives the same variable.
\n\"2nd<\/p>\n

Question 12.
\nWhat is principle of duality? Give an example.
\nAnswer:
\nThe principle of duality states that starting with a Boolean relation, another relation can be derived by<\/p>\n

    \n
  1. Changing each OR sing (+) to an AND sign (.).<\/li>\n
  2. Changing each AND sing (.) to an OR sign (+).<\/li>\n
  3. Replacing each 0 by 1 and each 1 by 0.<\/li>\n
  4. All variables are complemented.<\/li>\n<\/ol>\n

    For example, (X + Y’) dual is (X’. Y)<\/p>\n

    Question 13.
    \nDifferentiate between base class and derived class.
    \nAnswer:
    \nA base class is a class from which other classes are derived. The class that inherits is called derived class. The inheriting class is called the derived class.<\/p>\n

    \"KSEEB<\/p>\n

    Question 14.
    \nMention different types of constructors.
    \nAnswer:
    \nThe three types of constructors are<\/p>\n

      \n
    1. Default constructor.<\/li>\n
    2. Parameterized constructor.<\/li>\n
    3. Copy constructor.<\/li>\n<\/ol>\n

      Question 15.
      \nWhat is a stream? Mention any one stream used in C++.
      \nAnswer:
      \nA stream is a sequence of characters that move from the source to the destination. The streams generally used for file I\/O is input stream, output stream, and error stream.<\/p>\n

      Question 16.
      \nWrite any advantages of database system.
      \nAnswer:
      \nThe two advantages of database system are controlling Redundancy and Sharing of data.<\/p>\n

      Question 17.
      \nMention any two data types used in SQL.
      \nAnswer:
      \nThe two data types used in SQL are number and varchar2.<\/p>\n

      \"KSEEB<\/p>\n

      Question 18.
      \nExplain the circuit switching technique.
      \nAnswer:
      \nA type of communication in which a dedicated channel (or circuit) is established at the time of transmission. For example, the telephone system, which links together wire segments to create a single unbroken line for each telephone call. Circuit-switching systems are ideal for communications that require data to be transmitted in real-time.<\/p>\n

      PART-C<\/p>\n

      Answer any five questions. Each question carries three marks: (5 \u00d7 3 = 15)<\/span><\/p>\n

      Question 19.
      \nWhat is the function of UPS? Mention different types of UPS.
      \nAnswer:
      \nThe function of UPS is<\/p>\n

        \n
      • UPS unit give continuous power supply in the event of main source power break.<\/li>\n
      • It also regulates the high and low voltage in power supply.<\/li>\n
      • They give different backup power ranging from 15 minutes to several hours.<\/li>\n<\/ul>\n

        On-line UPS and Off-line UPS are the two types of UPS.<\/p>\n

        Question 20.
        \nWrite the logic diagram and truth table for a NAND gate.
        \nAnswer:
        \nThe truth table of NAND gate
        \n\"2nd<\/p>\n

        The standard symbol of NAND gate.<\/p>\n

        \"2nd<\/p>\n

        Question 21.
        \nExplain the various operations performed on queue data structure.
        \nAnswer:
        \nA queue is a non-primitive data structure where an item is inserted at one end and removed from the other end.<\/p>\n

        The queue(), enqueue(item), dequeue(), isEmpty() and size() are the operations that can be performed on queues.<\/p>\n

          \n
        • Queue() – create an empty queue<\/li>\n
        • enqueue(item) – insert in element into the queue.<\/li>\n
        • dequeue() – remove the element from the queue.<\/li>\n
        • isEmpty() – returns true if queue is empty otherwise false.<\/li>\n
        • size() – give the count of elements in a queue.<\/li>\n<\/ul>\n

          \"KSEEB<\/p>\n

          Question 22.
          \nWhat is array of pointers? Give an example.
          \nAnswer:
          \nThe one dimensional or two-dimensional pointer array is called array of pointer.
          \nFor example, int *ptr[5];
          \nWhere *ptr is array pointer variable and size of array is 5. i.e., ptr[0], ptr[l], ptr[2], ptr[3], ptr[4].<\/p>\n

          Question 23.
          \nList the different modes of opening a file with their meaning in C++.
          \nAnswer:
          \nThe methods of opening file within C++ program<\/p>\n

            \n
          • Opening a file using constructor<\/li>\n
          • Opening a file using member function open() of the class<\/li>\n<\/ul>\n

            Opening a file using constructor:
            \nThe syntax for opening file for output purpose only is ofstream obj(“filename”);
            \nExample:
            \nofstream fout(“results.dat”);<\/p>\n

            \"KSEEB<\/p>\n

            Question 24.
            \nWrite the different symbols used in E-R diagram with their significance.
            \nAnswer:
            \n\"2nd<\/p>\n

            Question 25.
            \nWhat is E-commerce? Explain any two types.
            \nAnswer:
            \nThe e-commerce is defined as buying and selling of products or services over electronic systems such as the Internet and other computer networks<\/p>\n

            1. B2B – Business to business:
            \nElectronic commerce that is conducted between business organizations is referred to as business-to-business or B2B. for example, transactions between manufacturing industry with suppliers of raw materials.<\/p>\n

            2. B2C – Business to Consumer:
            \nElectronic commerce that is conducted between trader and consumers is referred to as business-to-consumer or B2C. This is the type of electronic commerce conducted by companies such as Amazon.com, ebay.com, etc.<\/p>\n

            Question 26.
            \nWhat is web-hosting? Mention different types of web-hosting.
            \nAnswer:
            \nWeb hosting means to put web-site content on a Web server and provide fast connection to the internet. The different type of web-hosting are:<\/p>\n

              \n
            1. Free Hosting<\/li>\n
            2. Virtual or Shared Hosting<\/li>\n
            3. Dedicated Hosting<\/li>\n
            4. Colocation Hosting<\/li>\n<\/ol>\n

              PART-D<\/p>\n

              Answer any seven of the following questions. Each question carries Five marks: (7 \u00d7 5 = 35)<\/span><\/p>\n

              Question 27.
              \nReduce.(F(A,B,C,D) = \u03a3(l,2,3,4,5,7,9, 11, 12, 13, 15) using Karnaugh map.
              \n\"2nd
              \nAnswer:
              \nReduced Boolean expression is AD + D + C<\/p>\n

              Question 28.
              \nExplain the memory representation of stack data structure using arrays.
              \nAnswer:
              \nThe items into the stack are stored in a sequential order from the first location of the memory block.
              \nA pointer TOP contains the location of the top element of the stack.
              \nA variable MAXSTK contains the maximum number of elements that can be stored in stack.
              \nThe stack is full when TOP = MAXSTK
              \nThe stack is empty when TOP = 0.<\/p>\n

              \"KSEEB<\/p>\n

              Question 29.
              \nWrite an algorithm of binary search.
              \nAnswer:
              \n\"2nd<\/p>\n

              \"KSEEB<\/p>\n

              Question 30.
              \nMention any five applications of OOP.
              \nAnswer:
              \nSome of the real life applications of object oriented programming are given below;<\/p>\n

                \n
              • Computer graphic applications<\/li>\n
              • CAD\/CAM software<\/li>\n
              • Object oriented database<\/li>\n
              • User interface design such as windows<\/li>\n
              • Real time systems<\/li>\n
              • Simulation and modeling<\/li>\n
              • Artificial intelligence and expert systems.<\/li>\n<\/ul>\n

                Question 31.
                \nWhat are access specifiers? Explain any two with examples.
                \nAnswer:
                \nThe data members and member functions can be accessed using access specifiers. They define the scope of members.
                \nThe different access specifiers are private, protected and public.<\/p>\n

                1. Private members:
                \nThe member data and members functions defined using access specifier private, can be accessed by member functions of that class only. Non-members of the class cannot access private members of the class. If no access specifier is mentioned for the members, then it is treated as private members.<\/p>\n

                2. Public members:
                \nThe public members of a class can be accessed by member functions of that class and also non member functions (outside the class) of the class. The public member functions can access private, protected and public data members of the class.<\/p>\n

                For example;
                \n\"2nd<\/p>\n

                The private data members regno, fees and name can be accessed by only getdata() and printdata() public member functions of the class student.<\/p>\n

                \"KSEEB<\/p>\n

                Question 32.
                \nWhat is function overloading? Explain the need for overloading.
                \nAnswer:
                \nThe overloading helps to apply polymorphism because Function overloading means two or more functions having same name but different types of arguments or different number of arguments. Whereas polymorphism refers to “one name having many forms of an object behavior depending on situations.<\/p>\n

                Function overloading is normally used when several function of the same name perform identical tasks on different data types. The overloading function helps to reduce the use of different names for many functions.<\/p>\n

                The developer of the program can use one function name to give function call to one in many functions and C++ select the appropriate function by checking the number of parameter and type of parameters. This reduces the selecting a function block to give a function call by the user.<\/p>\n

                It is easier to understand the flow of information that helps in faster debug. Easy program maintenance. There can be common interface between programs and real-world objects.<\/p>\n

                Question 33.
                \nExplain destructor with syntax and example.
                \nAnswer:
                \nIt is a special function used to release the memory space allocated by the object.
                \n\u2192 Name of the Destructor is similar to the class, which it belongs.
                \n\u2192 It does not have argument(s) and doesn’t return any value (no return type)
                \n\u2192 Destructor is preceded by ~ (tilde) sign.
                \nFollowing points should be kept in mind while defining and writing the syntax for the destructor:<\/p>\n

                  \n
                • A destructor function must be declared with the same name as that of the class to which it belongs.<\/li>\n
                • The first character of the destructor name must begin with a tilde (~).<\/li>\n
                • A destructor function is declared with no return types specified (not even void).<\/li>\n
                • A destructor function must have public access in the class declaration.<\/li>\n<\/ul>\n

                  General Syntax of Destructors:
                  \n~ classname();
                  \nThe above is the general syntax of a destructor. In the above, the symbol tilde ~ represents a destructor which precedes the name of the class.
                  \nFor example,
                  \n\"2nd<\/p>\n

                  Question 34.
                  \nWhat is inheritance? Mention its advantages.
                  \nAnswer:
                  \nIn object-oriented programming, inheritance is a way to form new classes using classes that have already been defined.
                  \n1. Reusability:
                  \nInheritance helps the code to be reused in many situations.<\/p>\n

                  2. Saves Time and Effort:
                  \nSince the main code written can be reused in various situations as heeded.<\/p>\n

                  3. Easy Maintenance:
                  \nThe different part of the programs written in C++ can be easily maintained due to the features of Inheritance, polymorphism, dynamic binding, etc.,<\/p>\n

                  4. Easy to extend:
                  \nThe programs can be extended with new features by adding very easily.<\/p>\n

                  5. Memory utlisation:
                  \nDue to the feature of dynamic binding and dynamic memory allocation (new and delete), memory can be efficiently used.<\/p>\n

                  \"KSEEB<\/p>\n

                  Question 35.
                  \nDefine the following database terms<\/p>\n

                    \n
                  1. Data model<\/li>\n
                  2. Tuple<\/li>\n
                  3. Domain<\/li>\n
                  4. Primary key<\/li>\n
                  5. Foreign key<\/li>\n<\/ol>\n

                    Answer:
                    \n1. Data model:
                    \nData models are fundamental entities that define how the logical structure of a database is modeled. Data models define how data is connected to each other and how they are processed and stored inside the system.<\/p>\n

                    2. Tuple:
                    \nCollection of related fields (e.g. Name, Age, register number, marks)<\/p>\n

                    3. Domain:
                    \nA domain describes the set of possible values for a given attribute.<\/p>\n

                    4. Primary key:
                    \nA primary key is a field in a table which uniquely identifies each row\/record in a database table. Primary keys must contain unique values. A primary key column cannot have NULL values.<\/p>\n

                    5. Foreign key:
                    \nA foreign key is a key used to link two tables together. Foreign Key is a column or a combination of columns whose values match a Primary Key in a different table.<\/p>\n

                    Question 36.
                    \nWhat is data definition language? Explain SELECT and UPDATE commands.
                    \nAnswer:
                    \nData Defintion Language commands create database objects such as tables, views, etc., The various Data definition language commands are Create Table, Alter Table, Create View, Drop Table, etc.,<\/p>\n

                    1. Select Command:
                    \nIt is used to view tuple\/records from the tables. It is a read only command.<\/p>\n

                    Usage:
                    \n> select columns from table_name where condition;<\/p>\n

                    For example:
                    \n> select * from tablename;
                    \n> select columnname1, columnname2,…. From tablename;
                    \n> select * from tablename where columnname=value<\/p>\n

                    2. UPDATE command:
                    \nThe update command is used to change row values from a table. The SET key word takes the column in which values needs to be changed or updated.
                    \nSyntax:
                    \nupdate tablename set columnname = value where condition;
                    \nExample:
                    \n> update marks set total = marks 1 + marks 2 + marks 3 where class =”IIPUC”;<\/p>\n

                    \"KSEEB<\/p>\n

                    Question 37.
                    \nGive the measures for preventing virus.
                    \nAnswer:
                    \n1. Install quality antivirus:
                    \nThe users should install professional, business-grade antivirus software on their PCs. Pro-grade antivirus programs update more frequently throughout the, protect against a wider range of threats (such as rootkits), and enable additional protective features (such as custom scans).<\/p>\n

                    2. Install real-time anti-spyware protection:
                    \nUse of professional (or fully paid and licensed) anti-spyware programs are required to prevent infections and fully remove those infections already present.<\/p>\n

                    3. Keep anti-malware applications current:
                    \nAntivirus and anti-spyware programs require regular signature and database updates. Without these critical updates, anti-malware programs are unable to protect PCs from the latest threats. Computer users must keep their antivirus and anti-spyware applications up to date.<\/p>\n

                    4. Perform daily scans:
                    \nEnabling complete, daily scans of a system’s on hard drive gives protection. These daily scans can be invaluable in detecting, isolating, and removing infections that initially escape security software’s attention.<\/p>\n

                    5. Disable autorun:
                    \nMany viruses work by attaching themselves to a drive and automatically installing themselves. As a result, connecting any network drives, external hard disks, or even thumb drives to a system can result in the automatic propagation of such threats. The users can disable the Windows autorun feature to avoid.<\/p>\n

                    6. Don’t click on email links or attachments:
                    \nUsers should never click on email attachments without at least first scanning them for viruses using a business-class anti-malware application. As for clicking on links, users should access Web sites by opening a browser and manually navigating to the sites.<\/p>\n

                    7. Use a hardware-based firewall:
                    \nThe software-based firewall included with Windows isn’t sufficient to protect systems. For this reason, all PCs connected to the Internet should be secured behind a capable hardware-based firewall.<\/p>\n","protected":false},"excerpt":{"rendered":"

                    Students can Download 2nd PUC Computer Science Previous Year Question Paper June 2015, Karnataka 2nd PUC Computer Science Model Question Papers with Answers helps you to revise the complete Karnataka State Board Syllabus and score more marks in your examinations. Karnataka 2nd PUC Computer Science Previous Year Question Paper June 2015 Time: 3 Hrs 15 …<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[82],"tags":[],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kseebsolutions.guru\/wp-json\/wp\/v2\/posts\/15458"}],"collection":[{"href":"https:\/\/kseebsolutions.guru\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kseebsolutions.guru\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kseebsolutions.guru\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kseebsolutions.guru\/wp-json\/wp\/v2\/comments?post=15458"}],"version-history":[{"count":0,"href":"https:\/\/kseebsolutions.guru\/wp-json\/wp\/v2\/posts\/15458\/revisions"}],"wp:attachment":[{"href":"https:\/\/kseebsolutions.guru\/wp-json\/wp\/v2\/media?parent=15458"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kseebsolutions.guru\/wp-json\/wp\/v2\/categories?post=15458"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kseebsolutions.guru\/wp-json\/wp\/v2\/tags?post=15458"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}