# Introduction to Number System and Logic

## Quiz Questions

 1. Blaise Pascal (French) invented the first adding machine in 1642. True False 2. The MSD in a number is the digit that has the greatest effect on that number and the LSD has the least effect on that number. True False 3. The number from which another number is to be subtracted is ___________ and the quantity to be subtracted is ____________. Minuend and Subtrahend Subtrahend and Minuend 4. The BINARY NUMBER SYSTEM is a ____system Base -2 Base -8 Base -16 5. The OCTAL NUMBER SYSTEM is a ______ system Base -2 Base -8 Base -16 6. The HEX NUMBER SYSTEM is a _____ system Base -2 Base -8 Base -16 7. The AND gate is a logic circuit that requires all inputs to be TRUE at the same time in order for the output to be TRUE. True False 8. In the OR gate, two switches are placed in parallel. If either or both of the switches are closed (view A), the lamp will light. The only time the lamp will not be lit is when both switches are open (view B). True False 9. The NOR gate is an OR gate with an inverter on the output. True False 10. In DIGITAL LOGIC (positive or negative), the TRUE condition of a statement is represented by the logic 1 state and the FALSE condition is represented by the logic 0 state. True False 11. The exclusive OR gate is a modified OR gate that produces a HIGH output when only one of the inputs is HIGH. True False 12. Does the adder make use of the and gate. Yes No 13. Flip-flops are bistable multivibrators. True False 14. The D FF is a two-input FF. The inputs are the data (D) input and a clock (CLK) input. The clock is a timing pulse generated by the equipment to control operations. The D FF is used to store data at a predetermined time and hold it until it is needed. This circuit is sometimes called a delay FF. True False 15. A _____ register is a register in which the contents may be shifted one or more places to the left or right. Shift Bit 16. RTL is an acronym for Resistor-Transistor Logic Register Transistor Logic 17. What are RTL, DTL, and TTL examples of? Logic families Logic devices 18. A circuit that generates timing control signals in a computer or other type of digital equipment is called ______ . Pulse Clock