ISC class XI sample paper 5

(Part 1 (30 marks). This part consists of compulsory short answer questions , Part 2 (70 marks) this part is divided into 3 sections A,B and C students are requested to answer 3 questions out of 4 from section A, & 2 questions out of 3 in section B & C. Each question carries 10 marks) Part I (30 marks) 1. Why D-flip-flop is known as Delay flip-flop? 2. What are jumping statements (break & continue)? 3. Write 2 difference between Half & Full adder 4. List 4 different processors used in computer? 5. What is tautology, contradiction, contingencies? 6. Convert the following octal to hexadecimal [2] [2] [2] [2] [2] [4] 1. 26 2. 44 3. 57 4. 91 Define the following commands of MSDOS [4] 1. COPY 2. TYPE 3. COMP 4. XCOPY Convert the following fractional number to binary [4] 1. 12.3 2. 5.45 3. 14.5 4. 23.7 Convert the following hex into decimal [4] 1. 8B 2. BAD 3. ACC 4. BE Solve the following [4] 1. (A1F)6=(?)10 2. (1010110)2=(?)8 3. (FACE)16=(?)2 4. (721235)8=(?)2 Part II (70 marks) Section A(30 marks) 1. Explain the following addressing mode [10] Immediate addressing o PC relative addressing o Register direct addressing Explain the importance of each functional unit inside your computer i.e. CPU, ALU,MU,CU, microprocessor [10] Define the following terms [10] o Operating system as I/O manager o Operating system as device manager. Explain Full adder with help of truth table, logic diagram and equation [10] Section B(20 marks) 1. Answer the following o Calculate address of a [2][4] for array of size a [4][5], whose word size is 2 bytes, and base address is 1024. The array is stored in column wise matrix. [2] o Explain terms related to software piracy [8] Intellectual property Trade mark Copy right patent 2. Explain the following terms related to JAVA [10] 1. Define recursive function 2. Function overloading as Polymorphism 3. What is buffered reader, explain how is it used in program 4. Mention the importance of public static void main(String args[]) 5. What is function overriding? 3. Explain Booting process in detail. With each phase described in depth, with the list of files loaded in computer [10] Section C (20 marks) 1. Write a program explaining recursive functions, where function name is Fact which returns factorial of N, & N is a parameter of the function [10] 2. Write a program explaining function overriding, which defines a class Shape from which class rectangle & Circle inherits. The function called area () is defined inside all classes with same parameter. Calculate area of circle & rectangle. [10] 3. A house has to be renovated, for that 2 things are to be done, which are as follows [10] 1. Square shaped marble flooring of size x, & floor covers area of 500sq/feet 2. Wall has to be paneled which is of L length, B Breadth , the wall covers area of 1500sq/feet Find number of marbles & panels required using function called area. Use function overloading method.