?Describe three different types of peripheral memory cards that are commonly used with PDAs.
What will be an ideal response?
The common types of peripheral memory cards used with PDAs are:?Compact Flash (CF)-CF cards were used for extra storage and work much the same way as PCMCIA cards.MultiMediaCard (MMC)-MMC cards were designed for mobile phones, but they can be used with PDAs to provide another storage area.Secure Digital (SD)-SD cards are similar to MMCs but have added security features to protect data; they're now used on smartphones.
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The ______ operation retrieves the item that was added earliest to a queue, but does not remove that item.
a) enqueue b) dequeue c) dequeueAll d) peek
Analyze the following code.
``` // Program 1: public class Test { public static void main(String[] args) { Object a1 = new A(); Object a2 = new A(); System.out.println(a1.equals(a2)); } } class A { int x; public boolean equals(Object a) { return this.x == ((A)a).x; } } // Program 2: public class Test { public static void main(String[] args) { Object a1 = new A(); Object a2 = new A(); System.out.println(a1.equals(a2)); } } class A { int x; public boolean equals(A a) { return this.x == a.x; } } ``` a. Program 1 displays true and Program 2 displays true b. Program 1 displays false and Program 2 displays true c. Program 1 displays true and Program 2 displays false d. Program 1 displays false and Program 2 displays false