Test on Codes, Circuits, and Digital Foundations
Codes, Circuits, and Digital Foundations: An Essential Student Guide
Test: Computer architecture & hardware: Architecture & Programming, Data encoding & representation — Binary & Codes, Foundations: electricity & electronic principles, History of computing & communications, Logic, circuits & digital design — Flip-flops & memory, Binary representation & encoding, Number systems history & concepts, Positional & base systems, Binary arithmetic & logic, Data encoding & representation — Fundamentals, Logic, circuits & digital design — Boolean & relay logic, Computer arithmetic & number systems, Computer architecture & hardware: Hardware & Components, Microprocessor & system programming, Memory, storage & data management, Operating systems & system software
20 questions
Question 1: The 23-bit fractional part of the significand is the only part stored, thus the single-precision floating-point format offers a precision of 23 bits.
A. Ano
B. Ne
Explanation: The study materials state: "The 23-bit fractional part of the significand is the only part stored. So even though only 23 bits are used to store the significand, the precision is said to be 24 bits." Therefore, the precision is 24 bits, not 23 bits.
Question 2: What is the hexadecimal operation code (opcode) for the Halt instruction in the automated adder, as described in the study materials?
A. 10h
B. FFh
C. 20h
D. 23h
Explanation: According to the provided tables of operation codes, the Halt operation consistently has the code FFh.
Question 3: When a hobbyist manufactured a printed circuit board in the old days, they would apply an acid-resistant material to the areas of copper they intended to etch away.
A. Ano
B. Ne
Explanation: The study materials state that to create a printed circuit board, a hobbyist would "cover all the areas of copper you want to preserve with an acid resistant and use acid to etch away the rest." This means the acid-resistant material was applied to the areas to be preserved, not etched away.
Question 4: According to the study materials, which of the following statements accurately describe the use of a plastic breadboard for wiring integrated circuits?
A. Each short row of five holes on the breadboard is electrically connected underneath the plastic base.
B. Integrated circuit chips are inserted into the breadboard such that they straddle a long central groove.
C. Each pin of an integrated circuit placed on the breadboard is electrically connected to four other holes.
D. The primary method for connecting chips on a breadboard involves a special wire-wrap gun.
Explanation: The study materials state that 'Each short row of 5 holes is electrically connected underneath the plastic base.' It also explains that 'You insert chips into the breadboard so that a chip straddles the long central groove and the pins go into the holes on either side of the groove.' Additionally, it clarifies that 'Each pin of the IC is then electrically connected to 4 other holes.' The use of a wire-wrap gun is described as a different, more permanent technique called wire-wrapping, not for breadboard wiring, where 'You connect the chips with pieces of wires pushed into the other holes'.
Question 5: The single-byte Increment (INR) and Decrement (DCR) instructions on the 8080 microprocessor affect all processor flags, including the Carry flag.
A. Ano
B. Ne
Explanation: The single-byte INR and DCR instructions affect all flags except the Carry flag. Therefore, the statement that they affect all flags including the Carry flag is incorrect.