CpE 301 LOGIC CIRCUITS AND DESIGN
A PRELIMINARY EXAM
Name: ___________________
Date: ____________
Course/Year: ____________
Score: ____________
TEST I
Direction: Read the statements carefully and identify what is being asked.
1. This refers to the massive adoption of computer systems within every aspect of our lives
from smart phones to automobiles to household appliances.
2. It is defined as a continuous, time-varying quantity that corresponds directly to the
information it represents.
3. It uses a direct mapping between an electrical quantity and the information being
processed.
4. A signals represent information that is transmitted between devices using an electrical
quantity.
5. The electrical signal itself is not directly the information it represents; instead, the
information is encoded.
6. It uses a discrete representation of the information.
7. It is not represented using traditional mathematical functions; instead, the values are
typically held in tables of 1’s and 0’s.
8. It is type of signaling on which the information is transmitted as a series of distinct values
9. It allows the digital signals to be more immune to noise in addition to requiring simple
circuits that require less power to perform the computations.
10. The most common type of encoding.
TEST II
Direction: Group the following items based on their category: ANALOG OR DIGITAL
Old CRT TV
Computer
Landline Telephones
Old Photocopier
Tele-autograph
Tape Recorders
Thermometer
Loudspeaker
ATM
Smart Phones
Audio Amplifier
Automobiles
Barometer
Weighing Machine
Audio Tape
Calculator
Condensers
Record Players
Standard Wired Telephone
Conventional Microphone
TEST III
Direction: Solve the following problems. Show complete, neat and orderly solution.
1. Find the magnitude of 654.168
2. Find the magnitude of 729.408
3. Find the magnitude of 532.998
4. Find the magnitude of 1230.608
5. Find the magnitude of 001001012
TEST IV
Direction: Provide the answers to the following given problems. Show a complete, neat, and
orderly solution.
Convert Binary to Hexadecimal and Octal
1. 1011112
2. 10000.11002
3. 11101110. 111110012
Convert Octal to Hexadecimal
4. 637072758
5. 454422218
Convert Base-k to Decimal
6. 928816
7. 4438e7018b16
Express Integer of Positional Numbers
8. 6956810
9. 9578810
10. 450662610
TEST V: ESSAY
Direction: Construct a response to the given essay questions. Make it at least five (5)
sentences long for each.
1. What do you mean by digital system? Discuss the characteristics of digital system.
2. Why digital systems are most preferred over analog ones?