Download Fundamentals of Computer Science and IT: Course Overview and Components and more Study notes Logic in PDF only on Docsity! Fundamentals of computer & IT WIT-101 Dr. Salma Shaheen 2017-2018 9/17/2017 salma shaheen FCIT 1 Details of WIT-101 Periods/Week 04 9/17/2017 salma shaheen FCIT 2 1. Periods per week 04 2. Total No. of Periods required 45 3. Mid. Sem Exam+ Assignment marks 25+15 = 40 4. End Sem. Exam marks 60 Total marks=60+40=100 5. Duration of end sem. exam 2.5 Hours 6. Attendance requirement 75% each subject (No Medical) Block Diagram along with Computer Component !Block Dia ram of Computer 5salma shaheen FCIT 9/17/2017 • Input Unit accepts the instructions and data from the outside world. Then it converts these instructions and data in computer acceptable form. after that it supplies the converted instructions and data to the computer system for further processing. Input Unit 6salma shaheen FCIT 9/17/2017 Output Unit The output unit is just reverse of the input unit. it accepts the result produced by computer, which are in coded form and can't be easily understood by us. Then it converts these coded result into human readable form. After that it supplies the converted results to the outside world. 7salma shaheen FCIT 9/17/2017 Secondary Memory • Secondary storage, sometimes called auxiliary storage, is all data storage that is not currently in a computer's primary storage or memory. This is computer memory that is not directly accessible to the processor but uses the I/O channels. It is for storing data not in active use and preserves data even without power, meaning it is non-volatile. In a personal computer, secondary storage typically consists of storage on the hard disk and on any removable media, if present, such as a CD or DVD. 10salma shaheen FCIT 9/17/2017 Arithmetic Logical Unit An arithmetic logic unit (ALU) is a digital circuit that performs arithmetic and logical operations. The ALU is a fundamental building block of the central processing unit (CPU) of a computer, and even the simplest microprocessors contain one for purposes such as maintaining timers. 11salma shaheen FCIT 9/17/2017 ALUs; a single component may contain a number of ALUs. Most ALUs can perform the following operations: 1).Integer arithmetic operations (addition, subtraction, and sometimes multiplication and division). 2).Bitwise logic operations (AND, NOT, OR, XOR) 3).Bit-shifting operations (shifting or rotating a word by a specified number of bits to the left or right, with or without sign extension). Shifts can be interpreted as multiplications by 2 and divisions by 2. Arithmetic Logical Unit 12salma shaheen FCIT 9/17/2017
