JAC Class 12 Computer Science Question Paper 2012 with Solution

About this paper

This is the Jharkhand Academic Council (JAC) Class 12 Computer Science paper from the 2012 board examination, with an answer under the questions. It is based on C++ and is split into three groups. Group A is one question of 15 multiple-choice parts on operators, structures, stacks, queues, SQL and gates. Group B, questions 2 to 10, is very short answers on encapsulation, keywords, expressions, linear search, keys and Boolean algebra, most of them with an Or alternative. Group C, questions 11 to 19, asks for programs, a postfix evaluation on a stack, SQL commands on a STUDENT table and a four-variable K-map. Marks and time are not printed.

Exam

JAC Class 12

Subject

Computer Science

Year

2012

Questions

19

Pages

5

Answers included

Yes

Paper pattern

• Group A

  Question 1 with 15 multiple-choice parts

• Group B

  Questions 2–10, very short answers, most with an Or alternative

• Group C

  Questions 11–19, short and long answers: C++ programs, algorithms, SQL, a K-map and networking

Topics covered

• C++ operators, keywords and expressions
• Header files and errors
• Object-oriented programming and encapsulation
• Structures
• Stacks, queues and linked lists
• Searching and sorting
• Database keys and functional dependency
• SQL
• Boolean algebra and K-maps
• Networking, modems and the internet

Questions from this paper

1. Encapsulation is one of the major properties of OOP. How is it implemented in C++?
2. What is the difference between a keyword and an identifier?
3. What is linear search?
4. Define candidate key and foreign key.
5. Prove that X(X + Y) = X by the algebraic method.
6. Evaluate the postfix expression 50, 40, +, 18, 14, −, 4, *, + using a stack, and show the stack after each step.