| Sub: Computer | Second Class Test 2078 | Full Marks: 25 |
| Class: XI | Morning Shift | Time: 35 Minutes |
|---|
Q1. Select the best answer: [5x1=5] (a) Which of the following works as an interface between hardware and user? (i) Operating System (ii) Adobe Reader (iii) Computer Virus (iv) Multimedia Software (b) Which of the following is open source software? (i) Linux (ii) Android (iii) moodle (iv) All of above (c) Dual of (x+1).z is .... (i) (x+0).z’ (ii) (x+0).1 (iii) (x+0).z (iv) (x.0)+z (d) Result of x.x in Boolean algebra is ____ (i) x2 (ii) x (iii) 2x (iv) None (e) Which symbol is used for absolute cell reference ? (i) @ (ii) ? (iii) $ (iv) + Q2. State and prove De-Morgan’s Theorem. [5] OR Realize AND, OR and NOT gate using NAND gate only. [5] Q3. Explain the roles of Operating System. [5]
| Sub: Computer | Second Class Test 2078 | Full Marks: 25 |
| Class: XI | Day Shift | Time: 35 Minutes |
|---|
Q1. Select the best answer: [5x1=5] (a) Which of the following is the main part of the operating system? (i) Kernel (ii) Hardware (iii) Utility Software (iv) Anti Virus (b) Which of the following is not open source software? (i) Linux (ii) Android (iii) moodle (iv) None of above (c) Dual of (x+y’).z is .... (i) (x+y’).z’ (ii) (x+y).1 (iii) (x.y’)+z (iv) (x.y’)+z’ (d) Result of x+x in Boolean algebra is .... (i) x2 (ii) x (iii) 2x (iv) None (e) Which symbol is used to insert a formula in Excel? (i) = (ii) $ (iii) ? (iv) + Q2. State and prove Distributive law of Boolean algebra. [5] OR Realize AND, OR and NOT gate using NOR gate only. [5] Q3. Explain the functions of Operating System. [5]