Which statement about ENIAC is true?

Which statement about ENIAC is true?

• A. It is a mechanical calculator
• B. It used integrated circuits
• C. It was completed in 1950
• D. It is one of the earliest electronic computers

Answer: (D)

ENIAC represents an early leap from mechanical and relay-based calculation to electronic computation. It used vacuum tubes to perform operations directly as electrical signals, which was a groundbreaking shift at the time. Because it was completed in 1945, not 1950, any statement tying it to a 1950 completion is incorrect. Integrated circuits hadn’t been used yet—ICs came later—so ENIAC didn’t rely on them. This combination of electronic design and its early completion makes it one of the first true electronic computers, which is why that statement is the correct one.

ENIAC represents an early leap from mechanical and relay-based calculation to electronic computation. It used vacuum tubes to perform operations directly as electrical signals, which was a groundbreaking shift at the time. Because it was completed in 1945, not 1950, any statement tying it to a 1950 completion is incorrect. Integrated circuits hadn’t been used yet—ICs came later—so ENIAC didn’t rely on them. This combination of electronic design and its early completion makes it one of the first true electronic computers, which is why that statement is the correct one.