Formative 1

Boolean type values in Kotlin can only have true or false values

• True

• False

The Float data type in Kotlin can have up to _____ significant bits.

• 53

• 24

• 16

• 32

The ______ control flow statement iterates through anything that provides an iterator.

• while

• when

• for

• if

What keyword is used to declare a package?

• package

• pckg

• pkg

• pack

What keyword is used to declare immutable variables (constants) in Kotlin?

• var

• None of the other choices is correct.

• val

• dec

The when control structure can replace if..else..if chain when used without putting any argument.

• True 

• False

Using if statement as an expression requires an else clause. False

• True 

• False

1. What is the output of the following code:

• 2

• 2.5

• Error, data type of variables is not the same

• Will not display any output

1. Which of the following statements will show the output: The value of x is:

• 

• All the other choices are correct

• 

• 

What is the data type of the variable declared below: val num = -42L.

• Short

• Byte

• Long

• Int

What symbol is used to define a raw string?

• a pair of single quotes

• three single quotes

• a pair of double quotes

• triple quotes

The if control structure in Kotlin is considered as an expression which means it is expected to return a value.

• True

• False

1. Analyze the code below:

• Error in line 2.

• Code will execute and will print: 1 2 3 4 5 6 7 8 9 10

• Code will execute and will print: 1 2 3 4 6 7 8 9 10

• Error in line 3.

What symbol is used for String concatenation in Kotlin?

• period ( . )

• plus ( + )

• comma ( , )

• ampersand ( & )

Analyze the code below:

• Code will execute and will print: 1 2 3 4 6 7 8 9 10

• Code will execute and will print: 1 2 3 4 5 6 7 8 9 10

• Code will execute and will print: 1 2 3 4

• Error in line 3.

You can use escape characters in a raw string.:

• True

• False

We can put underscores in the initial values of numeric type variables, e.g. val x = 1_234.

• True 

• False

The symbol $ is used when creating string templates.

• True

• False

Which of the following shows the Kotlin built-in Boolean operations?

• ||, &&, !!

• |, &, !

• ||, &&, !

• |, &, !!

The return jump expression terminates the nearest enclosing loop.

• True

• False

1. Analyze the code below and determine its output:

• The value is $7.

• The value is: x + 2.

• The value is: ${x + 2}.

• The value is: 7.

What will happen if the code below is executed?

• It will execute normally and prints: 6 5 2

• Error in line 4, the for statement needs more arguments.

• Error in line 2, it is not the correct way of defining arrays.

• It will execute normally and prints: 3 9

To explicitly define a Float type variable, you have to add a suffix ____ after the initial value.

• Fl or fl

• Float or float

• F or f

• Ft or ft

1. What is the output of the code below?

• The sum is: 13

• Error, variable x and y does not have the same data type

• Error, statements do not have semicolons

• The sum is: 13.4

1. What is the output of the code below?

• Error, data type of variables is Int

• Will not display any output

• 2.5

• 2

What is the range value of the Int data type?

• 2,147,483,648 to 2,147,483,647

• -2,147,483,647 to 2,147,483,648

• -2,147,483,647 to 2,147,483,647

• -2,147,483,648 to 2,147,483,648

We can use template expressions in string by using _____ symbol followed by either an identifier or an expression delimited by curly braces.

• &

• @

• ^

• $

What jump expression terminates the nearest enclosing loop?

• break

• return

• goto

• continue

1. What is the output of the code below?

• Will not display any output.

• String Another

• Another $x

• Another String

How many numerical data types are there in Kotlin?

• 6

• 4

• 5

• 3

The Byte data type has a size of _____ bits.

• 16

• 8

• 32

• 4

What function is used in removing leading whitespaces in a raw string?

• trimLead()

• trimWhitespace()

• trim()

• trimMargin()

This statement replaced the switch statement in other programming languages.

• when

• then

• choice

• select

1. What is the output of the following code?

• Error, the code uses unknown symbols to delimit a string value.

• |First Name: Joseph

     |Last Name: Calleja

• Error, the code uses and unknown function, trimMargin()

• First Name: Joseph

                               Last Name: Calleja

1. When iterating through a range of numbers using the for statement, we use the range expression which is represented by the symbol ________.

• “”

• ..

• [ ]

• ( )

All variables initialized with a fractional number will infer the _____ data type.

• Short

• Double

• Float

• Int

Analyze the following code:

• It will run and will print: Grade is: Failed

• It will run but there will be no output.

• It will not run due to an error in the condition in the if statement.

• It will run and will print: Grade is: Passed

while and do..while loops are also available in Kotlin and are used the same way they are used in other programming languages.

• True

• False

String is a mutable data type.

• True

• False

Characters are treated as numbers in Kotlin.

• True

• False

1. Analyze the code below:

• The program has an error in line 5, !in is not a valid statement.

• The program has an error in line 7, keyword else is not used in when statement.

• The program will execute, and prints Can now vote.

• The program will execute but will not print anything.

Using if statement as an expression requires an else clause.

• True

• False

String templates can be used in raw strings.

• True

• False

Individual characters in a Sting-type value can be accessed by indexing operation.

• True

• False

If you want to explicitly declare a variable with a Long data type, your have to append a suffix _______ to its initial value.

• LNG or lng

• L or l

• Lng or lng

• Long or long

Raw strings can contain escape code characters.

• True

• False

1. Which of the following codes correctly declares an Int-type array of size 5, initializes the array with values 1, 2, 3, 4, 5 and prints the values vertically?