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Nested Selection & Iteration

Quiz by GCSE Computer Science Teacher 4

GCSE (AQA)
Computer Science
English National Curriculum

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10 questions
Show answers
  • Q1
    What is meant by nested selection?
    One selection below another selection statement, which increases the conditions
    One iteration below another iteration, another which increases the conditions
    One iteration within another iteration, which increases the conditions
    One selection within another selection statement, which increases the conditions
    60s
    3.2.2.c
  • Q2
    What is meant by nested iteration?
    One iteration below another iteration, which increases the conditions
    One iteration within another iteration, which increases the conditions
    One selection below another selection statement, which increases the conditions
    One selection within another selection statement, which increases the conditions
    60s
    3.2.2.c
  • Q3
    What is this program is doing?
    Question Image
    Looping through 10 times to check there are 8 characters
    Checking if the password is equal to the username
    Checking if the password is equal to the username and if it's over 8 characters
    Checking if it's 8 characters
    60s
    3.2.2.c
  • Q4
    Which is the correct code for a nested loop to show all the times table?
    FOR i <-- 1 TO 10 FOR I <-- 1 to 10 OUTPUT j * i ENDFOR ENDFOR
    DO i <-- 1 TO 10 DO j <-- 1 to 10 OUTPUT j * i ENDDO END
    WHILE I <-- 1 TO 10 WHILE j <-- 1 to 10 OUTPUT j * i ENDWHILE ENDWHILE
    FOR i <-- 1 TO 10 FOR j <-- 1 to 10 OUTPUT j * i ENDFOR ENDFOR
    60s
    3.2.2.c
  • Q5
    Why do we need separate variables for i and j? FOR i <-- 1 TO 10 FOR j <-- 1 to 10 OUTPUT j * i ENDFOR ENDFOR
    A DO-UNTIL loop should have been used
    A while loop should have been used
    The i and j would always be the same value as it would be replaced each time
    It could have been i and j because it would show all of the times table
    30s
    3.2.2.c
  • Q6
    What code will add two values together for every number from 1 to 10?
    WHILE i <-- 1 TO 10 WHILE i <-- 1 to 10 OUTPUT i + i ENDWHILE ENDWHILE
    FOR i <-- 1 TO 10 FOR j <-- 1 to 10 OUTPUT j + i ENDFOR ENDFOR
    DO UNTIL i <-- 1 TO 10 DO UNTIL i <-- 1 to 10 OUTPUT i + i
    FOR i <-- 1 TO 10 FOR i <-- 1 to 10 OUTPUT i + i ENDFOR ENDFOR
    120s
    3.2.2.c
  • Q7
    What code has created a nested iteration to check whether the user still wants to play the game, and whether they have inputted their name with at least one character?
    WHILE gamePlay = "Y" END WHILE
    WHILE gamePlay = "Y" DO username <-- USERINPUT UNTIL username != "" END WHILE
    DO username <-- USERINPUT UNTIL username != ""
    FOR gamePlay = "Y" DO username <-- USERINPUT UNTIL username != "" END FOR
    120s
    3.2.2.c
  • Q8
    Which program will check if someone is less than 18 and if they're, check whether they're a child or teenager?
    age = USERINPUT WHILE age > 18 OUTPUT "Now checking if you're a child or teenager" IF age < 13 OUTPUT("You're a child") ELSE OUTPUT("You're a teenager") ENDWHILE
    age = USERINPUT WHILE age > 18 OUTPUT "Now checking if you're a child or teenager" WHILE age < 13 OUTPUT("You're a child") ELSE OUTPUT("You're a teenager") ENDWHILE
    age = USERINPUT IF age > 18 OUTPUT "Now checking if you're a child or teenager" IF age < 13 OUTPUT("You're a child") ELSE OUTPUT("You're a teenager") ENDIF
    age = USERINPUT IF age < 18 OUTPUT "Now checking if you're a child or teenager" IF age < 13 OUTPUT("You're a child") ELSE OUTPUT("You're a teenager") ENDIF
    120s
    3.2.2.c
  • Q9
    Why do you need to be careful using nested selection or iteration?
    They are not efficient when combined
    They are only used in some langauges
    It can be become confusing with multiple conditions
    They are difficult to program
    60s
    3.2.2.c
  • Q10
    How many times in total will hello be output?
    Question Image
    4
    8
    16
    2
    60s
    3.2.2.c

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