Previous Year Question Paper for CBSE Class 12 Computer Science - 2018

With the advent of digitalization, human beings have expanded their sphere of activity a lot.  The same digitalization is now helping the students through Vedantu. Previous Year Computer Science Question Paper for CBSE Class 12 - 2018 could be accessed by any student free of cost and this could be done without going anywhere. 

The student can use this online facility and practice the previous year questions. Solving the previous year questions has many benefits. It enables students to be more organized and have a good time management plan for attempting the exam. One is acquainted with the latest ongoing trends in the examination and can equip oneself with the right kind of approach to score well.  

Self-Evaluation is the key 

One should keep evaluating the performance in regular intervals. Self-evaluation is best done through writing previous year question papers, that too with the same seriousness and intensity as in the exams.  This technique of evaluating oneself will enhance a student's preparation for the exam. It highlights minor details that are usually not visible to the eyes and allows us to fix them.  Wringing practice and better finishing exams on time are a couple of things that are achievable only through solving previous year question papers. 

Overview of CBSE Class 12 Computer Science Question Paper 2018

There is a choice between the first two sections, that is, Section A and Section B.

• Section A consists of questions from C++

• Section B consists of questions from Python 

Section A

The first section (Section- A) of the computer science question paper 2018 is meant for students who had taken up C++ in their 10+2. This section carries a total of 44 marks and all the questions are mandatory to be answered. The marks weightage for the questions in this section varies from 1 mark to 4 marks. The concepts of parameters, arguments, functions, header files are required to answer the questions of this section properly. Data abstraction, polymorphism, array, for and nested for loop, and various other concepts of Object-Oriented Programming of students are assessed in this section. Some of the questions in this section are aimed to assess the concepts of basic programming syntax of C++. 

For certain questions, there are step marks allotted for the programs to be coded. Students may need to dry run the code snippets and get the write the desired output for these questions. Mostly these questions carry 1 mark for each line of output. For certain questions, choices are provided and students are required to answer with the correct choice of output and respective reasons. Also, for some of the code snippets, students may need to identify the errors and write the respective correct codes in their answers.

Going by this cs 2018 question paper students are likely to expect a couple of questions for which they will have to code proper classes and their objects, inclusive of the given requirements of class members and functions. 

Few questions in this section are aimed to test the various concepts of 2D arrays. On taking a closer look at these questions, students may jot down the concepts being they need to brush up, as follows:

• Row Major formula

• Sorting of a 2D array

• Finding the base address and address of the elements of a given array   

This section of the 2018 CBSE computer science paper consists of questions from various concepts such as POSTFIX expressions and their consequent effects on memory allocation. A couple of questions in this section are from the topics of Stack memory, PUSH, POP operations, pointers, and data updations in binary files.  

Section B

The second section (Section-B) of this question paper consists of questions from the programming language of Python. This section carries a total of 44 marks and students must answer all the questions in this section. The basic concepts of ‘for’ loop such as ‘break’, ‘continue’ and identifying module names for given functions are assessed in the questions of this section. 

For some questions, students will have to scrutinize the given Python code snippets, identify the syntactical errors and write down the correct codes. Like ‘Section-A’, this section also has questions for which students need to have a strong base in coding. Some of these questions may need them to write an entire program whereas for the other questions students may need to dry run the given codes and write the correct output.  Students need to have a detailed idea of Python coding to fetch a good score in this section as the questions have step markings as well.   

The concepts such as class attributes, Operator Overloading that is utilized to implement Polymorphism are also assessed in the questions of this section.

Section C

This section carries a total of 26 marks and is mandatory for all students to attempt. It consists of questions from the database and SQL. Students will need to be thorough with the definitions of various commands such as DDL, DML and the operators of SQL such as UPDATE, ALTER, SELECT and DROP, to fetch the maximum score in this section. Apart from having strong concepts of various SQL commands and operators, students will also have to be thorough with the SQL queries. They may expect one or more tables to be provided for certain questions and they will have to write queries fetching various data from those tables. 

In the latter part of Section C, there are questions from the topics of Boolean Algebra. It is necessary to have proper knowledge of the various logic gates, and related truth tables. One of the most commonly asked topics from Boolean Algebra is the ‘De-Morgan’s Law’. Various proofs using De-Morgan's law wherein proper truth tables are also required to be provided are included in this section. Another scoring part from Boolean algebra is the drawing of Logic circuit diagrams.

CBSE class 12 computer science question paper 2018 download is free on Vedantu and referring to the same will help students get a clear idea of the types of questions they may expect in the board exams. Also, students may download and refer to the solutions of the last five years' computer science board question papers of CBSE class 12 from Vedantu for their practice and take a note from the sample answers for a better understanding of the concepts.