ict5_mt_w5-6_q2

What are the individual values stored in an array called?

• Variables

• Identifiers

• Elements

• Collections

In Java, which operator is specifically used to determine the remainder of a division operation?

• /

• *

• -

• %

Explain the difference between declaring an array with values and declaring an array without values (specifying size).

• Declaring with values initializes the array elements, while declaring without values only reserves memory.

• Declaring with values creates a fixed-size array, while without values creates a dynamic array.

• Declaring with values uses less memory.

• There is no functional difference; it's just a matter of preference.

Explain the key difference between the == operator and the = operator in Java programming contexts.

• == is used for assignment, while = is used for comparison.

• == is used to declare variables, while = is used to initialize them.

• == and = are interchangeable; they serve the same purpose.

• == is used for comparison, while = is used for assignment.

How do arrays promote "Effectiveness and Efficiency" in computer programming?

• By allowing programmers to write less code to manage large datasets.

• By automatically handling data conversions.

• By providing built-in sorting mechanisms.

• By improving the graphical user interface.

A Java application manages inventory. If currentStock is 100 and itemsSold is 25, write the Java code snippet to update currentStock after itemsSold are deducted, using an arithmetic operator.

• currentStock + itemsSold;

• currentStock = currentStock - itemsSold;

• currentStock * itemsSold;

• currentStock / itemsSold;

Declare a Java array named temperatures to store daily high temperatures for a week, and initialize it with arbitrary integer values.

• int temperatures = {25, 28, 30, 27, 26, 29, 31};

• int temperatures[] = {25, 28, 30, 27, 26, 29, 31};

• temperatures[] = new int[7];

• int temperatures[7];

A Java program requires checking if a user is both an "admin" and "active". If isAdmin and isActive are boolean variables, construct a Java logical expression that is true only when both conditions are met.

• isAdmin || isActive

• isAdmin != isActive

• isAdmin && isActive

• !isAdmin

A Java method receives an integer num. You need to return true if num is an even number, and false otherwise. Which operator would be most useful in determining if num is even?

• %

• /

• *

• +

Write the Java code to print the first element of a String array named colors that has been previously declared and initialized.

• System.out.println(colors[0]);

• System.out.println(colors[1]);

• System.out.println(colors.first());

• System.out.println(colors.value(0));