Exam 10: Javascript: Arrays

What is the effect of the join statement in the following code Var theArray1 = [ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 ]; Var theArray2 = [ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 ]; Var value = theArray1.join( " " );

Pass-by- ________ is the method of passing the argument's address in memory to a function.

Which of the following is an illegal array initialization statement

What would the browser output if the following script is executed < script type = "text/javascript" > < !-- Var array = [ [ 1, 2, 3 ], [ 1, 2, 3 ] ]; For ( var i in array ) { For ( var j in array[ i ] ) Document.write( array[ i ][ j ] + " " ); Document.writeln("< br / >"); } //-- > < /script >

What does the following code do For ( var col = 0; col < a[ 2 ].length; ++col ) A[ 2 ][ col ] = 0;

Which of the following is the proper method to dynamically allocate memory to an array of 100 elements

In JavaScript, numbers and boolean values are passed to functions by ________.

The first statement below ________ the array while the second statement ________ the array. Var c; C = new Array( 12 );

_________ are data structures consisting of related data items (sometimes called collections of data items).

Which of the following is the proper method to access the length of the array arr

By default, the JavaScript sort method uses ________ to sort the array passed to it.

The sort method can be given a function to use for the comparisons it makes, called a(n) ________ function.

What will the browser display if the following script is executed < script type = "text/javascript" > < !-- Var theArray = [ 1, 2, 3, 4, 5, 6, 7, 8, 9 ]; ModifyArray( theArray[ 3 ] ); Document.write( theArray.join( " " ) ); Function modifyArray( i ) { I = 11; } //-- > < /script >

When working with data stored in arrays, it's often necessary to determine whether an array contains a value that matches a certain ________.

What is the value of num assuming that all 12 elements of array test are initialized to 3 ++test[ 7 ]; Var num = test[ 7 ];

Pass-by- ________ is the method of passing a copy of the argument's value to a function.

To refer to a particular location or element in the array, we spec ify the name of the array and the ________ of the particular element in the array.

In JavaScript, all objects and arrays are passed to functions by ________.