9th Class Computer Notes

Very Important Notes of 9th Class Computer Notes written by Professor Mr. Faraz Qasir Suib. These computerized Notes are very helpful in the preparation of the 9th Class Computer Notes for the students of Computer Science of 9th Class and these are according to the paper patterns of all Punjab boards.

• Here are the detailed 9 class computer notes to help you prepare for your exams.
• Note: Write answers to the questions on objective answer sheet provided Four possible answers A, B, C & D to each question are given. Which answer you consider correct. Choose the correct answers.
• Transistor is ____ times faster than vacuum tubes.  (a) 40  (b) 20  (c) 10  (d) 50
• Rectangular circuit board is called:  (a) Memory  (b) Processor  (c) Disk  (d) Mother board
• CPU is command called ______ of computer. (a) Brain  (b) Input  (c) Output  (d) Program
• Hard disk is a ______ Disk.  (a) Optical  (b) Magnetic  (c) Read only  (d) Random Access
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• Collection of 8-bits is known as:  (a) Byte  (b) Nibble  (c) Character  (d) Mega byte
• Which is volatile memory?  (a) Rom  (b) CD  (c) RAM  (d) Hard disk
• Decimal number system has _____ digits.  (a) 8  (b) 10  (c) 16  (d) 2
• In Boolean Algebra “OR” operation is denoted by:  (a) *  (b) /  (c) +  (d)  .
• The types of software are:  (a) two  (b) three  (c) four  (d) five
• Which is extension of Microsoft word document?  (a) .ppt  (b) .xis  (c) .doc  (d) .wav
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• The third generation computer use: (a) Vacuum tubes  (b) IC’s  (c) Transistors (d) Microprocessor
• USB port is used to connect printer with the computer? (a) 125  (b) 126  (c) 127  (d) 128
• Which port is used to connect printer with the computer?  (a) Serial (b) Parallel  (c) HDMI  (d) VDO
• Which one of the following is not an output device.  (a) Scanner  (b) Printer  (c) Monitor  (d) Speaker
• Standard size of floppy disk is:  (a) 4 1/2^n  (b) 2 1/2^n  (c) 3 1/2^n  (d) 6 1/2^n 
• These 9th computer notes are designed to simplify your study sessions.
• One nibble is equal to:  (a) 2 bits  (b) 4 bits  (c) 8 bits  (d) 16 bits
• The base of binary number system is:  (a) 2 (b) 8  (c) 10  (d) 16
• Boolean Algebra was invented in: (a) 1847 (A)D (b) 1947 (A)D  (c) 1857 (A)D (d) 1957 (A)D
• Windows ___: (a) has a GUI (b) is not an Operating System  (c) is a compiler  (d) is a device
• Good time was a:  (a) Virus  (b) Antivirus  (c) Fake News  (d) Hardware
• 2. Answer briefly any four parts from the following.
• (i) Define Computer.
• (ii) Define Complier.
• (iii) What is meant by Computer Hardware?
• (iv) Write a brief note on Data bus.
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• (v) What is the function of Arithmetic and Logic Unit (ALU)?
• (vi) Write a note on USB ports.
• 3. Answer briefly any four parts from the following.
• (i) What is meant by Input devices?
• (ii) Define  Main Memory.
• (iii) What is meant by PROM?
• (iv) What is meant by Data Rate?
• (v) What is meant by Data?
• (vi) Define BCD code.
• 4. Answer briefly any five parts from the following.
• (i) Define the preposition.
• (ii) Describe the “OR” operation by truth table.
• (iii) What is use of CD command?
• (iv) Describe the internal DOS command
• (v) Define the file extension.
• (vi) What is Antivirus?
• (SECTION – II),  Note: Attempt any TWO questions.
• 5. Write a note on any two classifications of computers.
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• 6. Define Monitor and describe its types with respect to structure.
• 7. Calculate 45 - 63 using 8 bits 1’s complement.
• 2. Answer briefly any four parts from the following.
• (i) Write a brief note on ENIA(C)
• (ii) What is meant by Von Neumann theory?
• (iii) Write the names of two types of computer software.
• (iv) What is meant by ALU?
• (v) Define Data bus.
• (vi) Define Serial port.