Selected MCQ

Current Question
In a certain code, adjacent letters are swapped in pairs. If FROG is coded as RFGO, then LAMP is coded as:
  • A. ALPM
  • B. LMAP
  • C. AMLP
  • D. PMAL
Correct Answer: A
Explanation:
Pairwise swapping gives LA→AL and MP→PM, so LAMP becomes ALPM.
Related Question 1
In a certain code, the letters of a word are arranged in alphabetical order. If KNIFE is coded as EFIKN, then SPOON is coded as:
  • A. NOPOS
  • B. NOOPS
  • C. OONPS
  • D. OOPNS
Correct Answer: B
Explanation:
Sorting the letters of SPOON alphabetically gives N, O, O, P, S.
Related Question 2
In a certain code, the letters of a word are arranged in alphabetical order. If GREEN is coded as EEGNR, then BROWN is coded as:
  • A. BORNW
  • B. BNORW
  • C. BNROW
  • D. BONRW
Correct Answer: B
Explanation:
Sorting the letters of BROWN alphabetically gives B, N, O, R, W.
Related Question 3
In a certain code, letters are replaced by their opposite letters in the alphabet. If BAG is coded as YZT, then RUG is coded as:
  • A. IFT
  • B. RFT
  • C. HUG
  • D. JEU
Correct Answer: A
Explanation:
Using opposite letters, R→I, U→F, and G→T.
Related Question 4
In a code, letters in odd positions are shifted one step forward and letters in even positions are shifted one step backward. If NOTE is coded as ONUD, then COLD is coded as:
  • A. DNMC
  • B. DOLD
  • C. CPKE
  • D. BNLE
Correct Answer: A
Explanation:
C→D, O→N, L→M, D→C by the alternating rule.
Related Question 5
In a certain code, the first letter is moved to the end. If ROAD is coded as OADR, then LANE is coded as:
  • A. ANEL
  • B. NELA
  • C. AENL
  • D. ELAN
Correct Answer: A
Explanation:
Moving the first letter to the end changes LANE to ANEL.