JAC Class 12 Computer Science Question Paper 2014 with Solution

About this paper

This is the Jharkhand Academic Council (JAC) Class 12 Computer Science paper from the 2014 board examination, with answers and C++ code written in. It has seven questions, in the style of a programming-and-SQL paper rather than the short Group B layout of the neighbouring years. They cover header files and program output, a Bank class with deposit and withdrawal rules, inheritance across livingbeing, ape and human, array row-sums and a postfix stack trace, binary files, SQL on EMPLOYEE and DESIG tables, Boolean laws and a K-map, and a cabling case for five buildings of Standard Bank. Marks and time are not printed.

Exam

JAC Class 12

Subject

Computer Science

Year

2014

Questions

7

Pages

5

Answers included

Yes

Paper pattern

• Group A

  Question 1: header files, data hiding, a program trace and class output

• Question 2

  Reusability, the serial class constructors, a Bank class, and inheritance questions on livingbeing, ape and human

• Question 3

  A function to sum one row of a 2-D array, a memory-address calculation, a sum of positive elements, and postfix evaluation

• Question 4

  File reading with seekg, counting lines in chapter.txt, and copying records from AMOUNT.DAT to CRITICAL.DAT

• Question 5

  Data independence, and SQL on the EMPLOYEE and DESIG tables

• Question 6

  Involution law, a product-of-sums form, a logic circuit and a K-map

• Question 7

  Ring topology, HTML and XML, and a five-building network layout for Standard Bank

Topics covered

• C++ header files and program output
• Classes, constructors and data hiding
• Inheritance and access specifiers
• Arrays and memory addressing
• Stacks and postfix evaluation
• File handling
• Data independence and SQL
• Boolean algebra and K-maps
• HTML, XML and network topology

Questions from this paper

1. Name the header files to which floor() and setw() belong.
2. Reusability of classes is one of the major properties of OOP. How is it implemented in C++?
3. Define a class Bank with Name, Account number, type of account and Balance, and functions to open an account, deposit, withdraw and display. The minimum balance is Rs. 1,000 for savings and Rs. 3,000 for current.
4. An array S[40][30] is stored in row-major order with each element occupying 2 bytes. If S[20][10] is stored at location 5500, find the location of S[15][5].
5. Evaluate the postfix expression 2, 4, *, 3, −, 10, 5, +, / showing the stack contents.
6. State the involution law and verify it using a truth table.