# Morse Code Multiple Choice Questions and Answers (MCQs) – 2

This set of Data Structures & Algorithms Multiple Choice Questions & Answers (MCQs) focuses on “Morse Code – 2”.

1. Which letter of the English alphabet has the shortest code in Morse Code?
a) A
b) C
c) B
d) E

Explanation: Morse code was designed so that the length of each symbol is inverse to the frequency of occurrence in text. Thus the letter in English, “E”, has a single dot.

2. Which word tells a word rate of Morse code’s shorter code durations for common characters such as “e” and “t”.?
a) PARIS
b) CODEX
c) PARCOD
d) SPACE

Explanation: PARIS tells about word rate that is typical of natural language words and reflects the benefits of Morse code’s shorter code durations for common characters such as “e” and “t”.

3. Is Morse code speed measured in words per minute (wpm).
a) True
b) False

Explanation: Morse code speed is measured in words per minute (wpm). The transmission rate of the Morse code is also measured is groups per unit (gpm).

4. Is Morse code speed measured in characters per minute (cpm)?
a) True
b) False

Explanation: Morse code speed is measured in characters per minute (cpm) as well as in words per minute (wpm). The transmission rate of the Morse code is also measured is groups per unit (gpm).

5. Who is the creator of Modern International Morse Code?
a) Samuel F. B. Morse
b) Karl Morse
c) Alexander Morse
d) Friedrich Clemens Gerke

Explanation: It was created by Friedrich Clemens Gerke in 1848 and initially used for telegraphy in Germany. Samuel Morse is the inventor of the telegraph after whom Morse code was named.
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6. What is meant by the single dot in Morse code?
a) A
b) C
c) B
d) E

Explanation: The most common letter in English, the letter “E”, has a single dot. Morse code was designed so that the length of each symbol is inverse to frequency of occurrence in text.

7. Which word offers a word rate that is typical of 5-letter code groups?
a) PARIS
b) CODEX
c) PARCOD
d) SPACE

Explanation: CODEX word offers a word rate that is typical of 5-letter code groups. PARIS is a standard word to measure the operator transmission speed of Morse Code.

8. What is the name of special procedural signals that are used to indicate changes in communications protocol status?
a) Prosigns
b) Aldis
c) BIT
d) Asterisk

Explanation: Prosigns are special unwritten procedural signals which are used to show changes in communications protocol status or white space text.

9. Space signal is of how many unit?
a) 1
b) 2
c) 3
d) 4

Explanation: Since the duration of Space Signal is equal to Dot Duration. So, the space signal is of 1 Unit. While a dash is 3 units and space between letters is also three units.

10. The letters of a word are separated by a space of how many units?
a) 1 Unit
b) 2 Units
c) 3 Units
d) 4 Units

Explanation: The letters of a word are separated by a space of 3 Unit. The representation of dot symbol has 1 unit, while the dash symbol has 2 units.

11. Which symbol is not defined inside the ITU recommendation on Morse code?
a) \$
b) .
c) +
d) ~

Explanation: The symbol \$ and & are not defined inside the ITU recommendation on Morse code. International Telecommunication Union is a union that mandated Morse code worldwide.

12. For which symbol there is no standard representation in Morse Code?
a) /
b) .
c) *
d) !

Explanation: There is no standard representation for the exclamation mark (!) in Morse code. The other symbols have been defined by the International Telecommunication Union.

13. In which year the symbol @ was added to the official Morse character set by ITU-R?
a) 2003
b) 2004
c) 2005
d) 2006

Explanation: On May 24, 2004, the symbol @ was added to the official Morse character set by International Telecommunication Union.

14. Which device was used to generate high speed Morse Code?
c) Vibrolex

Explanation: Iambic Paddle was used to generate high speed Morse Code in conjunction with an electronic keyer. It was commercially manufactured.

15. Who along with Samuel Morse developed Morse code?
a) Alfred Vail
b) Alan Turing
c) Jedidiah Morse
d) Lucretia Pickering Walker

Explanation: Alfred Vail along with Samuel Morse developed Morse code. While Jedidiah Morse, Lucretia Pickering Walker were his father and spouse respectively.

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