Quiz Answers

Variables

  1. What are the two main divisions in a DBL program?
    • Procedure division and memory division
    • Data division and procedure division
    • Data division and memory division
    • Procedure division and static division
  2. What keyword allows for variable declarations within the procedure division in recent versions of DBL?
    • Var
    • Data
    • Local
    • Static
  3. What are the storage specifiers available for records in DBL?
    • Static, local, and global
    • Stack, global, and local
    • Stack, static, and local
    • Local, global, and data
  4. What is the primary difference between “stack” and “static” variables in DBL?
    • Stack variables are shared across the program, while static variables are unique to each function
    • Static variables retain their value between function calls, while stack variables are deallocated when the scope is exited
    • Stack variables persist until the program ends, while static variables are deallocated when the scope is exited
    • Static variables are shared across the program, while stack variables are unique to each function
  5. How are “data” variables stored in DBL?
    • They are stored statically
    • They are stored locally
    • They are stored on the stack
    • They are stored globally
  6. What data containers in DBL can hold multiple related data items of various types?
    • Functions
    • Groups
    • Records
    • Variables
  7. True or False: It’s mandatory to put ENDRECORD at the end of a record declaration in DBL.
    • False. It’s not mandatory to put ENDRECORD at the end of a record declaration in DBL, but it is considered good form.

Primitives

  1. What are the three forms of alpha types in DBL?

    • a, alpha, a10
    • a, a*, a{size}
    • a, a10, a*
    • a, a*, a{size}+

  2. What’s the maximum length of alpha types in 32-bit Windows and Linux when running Traditional DBL?

    • 65,535 characters
    • 32,767 characters
    • 2,147,483,647 characters
    • 2,147,483,648 characters

  3. In Traditional DBL, how is a byte represented?

    • Eight-bit unsigned integer
    • Eight-bit signed integer
    • Sixteen-bit signed integer
    • Sixteen-bit unsigned integer

  4. What is the main difference between the decimal and implied-decimal types in DBL?

    • Decimal types are unsigned; implied-decimal types are signed.
    • Decimal types are whole numbers; implied-decimal types have a sized precision.
    • Decimal types have a fractional precision; implied-decimal types are whole numbers.
    • Decimal types are signed; implied-decimal types are unsigned.

  5. What is the default value for the .NET System.Double structure in DBL?

    • 1.0
    • 0.0
    • NULL
    • Undefined

  6. Which types does short map to in Traditional DBL and DBL on .NET, respectively?

    • i2 and System.Int32
    • i2 and System.Int64
    • i2 and System.Int16
    • i4 and System.Int16

  7. When defining a record, when must you include a size for these DBL types: a, d, i, id?

    • Only when the fields need to be stored in an array
    • Only when the fields will be processed in a loop
    • When the fields define a memory layout (this is most of the time)
    • When the fields are initialized with a certain value

  8. In DBL, when is the size of parameters and non-^VAL return types determined?

    • At compile time
    • At runtime
    • When they are initialized
    • When they are declared

  9. What happens when you pass the string “a slightly longer alpha” to a routine with an unsized alpha parameter myFld, a?

    • An error occurs as the parameter is unsized
    • The parameter myFld will have a size of 23
    • The parameter myFld will have a size of 24, including the end character
    • The program will crash

Control Flow

Mini quiz
What does this program output if `month` is 5 instead of 3?
  - shrug
What does this program output if `month` is 5555 instead of 3?
  - "wild month"

  1. Consider the following IF construct: IF condition THEN statement1 ELSE statement2. What does statement2 represent?

    • The statement to be executed when the condition is true
    • The statement to be executed when the condition is false
    • The condition to be checked after the initial condition is checked
    • The default statement that is always executed

  2. In an IF construct, are parentheses around the condition required?

    • Yes, the condition must always be enclosed in parentheses
    • Yes, but only when using the ELSE IF clause
    • No, parentheses can improve readability but are entirely optional
    • No, parentheses are not allowed in the IF construct

  3. Which statement about THEN in DBL is correct?

    • THEN is always required in IF and ELSE IF statements
    • THEN is only required in IF statements
    • THEN is never required in DBL
    • THEN is required if another ELSE or ELSE-IF will follow, but it is not allowed on the last one

  4. Consider you have a piece of code where you need to execute different blocks of code based on the value of a single variable. Which control flow structures are the most appropriate for this purpose in DBL?

    • IF, ELSE IF, ELSE
    • USING, CASE
    • FOR, WHILE
    • BEGIN, END

  5. What is the purpose of the ELSE clause in a CASE control flow statement?

    • It provides a condition to be checked if no prior conditions have been met
    • It acts as the default case that is always executed
    • It specifies a block of code to be executed if no case labels match the value of the switch expression
    • It causes the program to exit the CASE statement if no match is found