Digital Logic & Computer Technology Quiz

Propagation delay is the time required for a digital signal to travel from the input to the output of a logic gate or circuit, representing the state transition time. Rise time measures output transition from low to high, decay time from high to low, while charging time is not standard terminology for gate delays.

Combinational circuits have NO memory elements - outputs depend only on present inputs. Sequential circuits DO have memory (flip-flops, registers) to store state information. The statement claims combinational circuits have memory, which is false.

To simplify f = A.B.C.D + A.C.D + A.D, factor out A.D from all terms: f = A.D(B.C + C + 1). Since C + 1 = 1, and B.C + C = C(B + 1) = C, the expression reduces to A.D. This is a direct application of Boolean algebra factorization and identity laws.

COBOL stands for COmmon Business Oriented Language. This name reflects its original purpose - a language designed for business, data processing, and administrative applications. Options A, B, and D incorrectly expand the acronym with 'Concentrated' or misspell 'Orientated.'

To answer this question, the user needs to know about the history of Facebook and its founder.

Option A, Marks Piterberge is incorrect, as this person does not exist and is not associated with the creation of Facebook.

Option B, Mark Swan is also incorrect. There is no known person by this name who founded Facebook.

Option C, Mark Zuckerberg is the correct answer. He is the founder of Facebook and is known for his role in creating the social media platform.

Option D, Mark Twain is an American author and humorist who lived in the 19th century. He is not associated with the creation of Facebook.

Therefore, the answer is: C. Mark Zuckerberg.