Java Collection Framework Basics
Java provides a Collection Framework that includes interfaces and classes to handle collections of objects efficiently.
Interfaces in Java Collections
Collection<E>(Root interface)List<E>(Ordered, allows duplicates)ArrayList<E>(Dynamic array)LinkedList<E>(Doubly linked list)Vector<E>(Synchronized, like ArrayList)Stack<E>(LIFO structure)
Set<E>(No duplicates)HashSet<E>(Unordered, unique elements)LinkedHashSet<E>(Ordered, unique elements)
Android Development Interview Questions & Answers
1. What is Android?
Answer:
Android is an open-source mobile operating system based on the Linux kernel and primarily designed for touchscreen mobile devices, such as smartphones, tablets, and wearables. Initially developed by Android Inc., it was later acquired by Google in 2005. Android allows developers to create applications in Java, Kotlin, or other programming languages. Android apps can run on a wide range of devices, from smartphones and tablets to TVs, wearables, and even cars.
2. What are
Read MoreEssential Design Techniques
Mastering Paragraph Styles
Create a Paragraph Style Based on Another
- Double-click a word on the page to apply it.
- Open the Paragraph panel by clicking the button on the right.
- Click “New Paragraph Style”.
- Double-click the new style and type the desired name.
- Double-click again to open options.
- Change “Based On” to the desired style.
- Change alignment (e.g., Center Alignment).
- Press OK.
Create a New Paragraph Style
- Type > Paragraph Styles.
- Create new style.
Dock Paragraph Styles Panel
- Dock the Paragraph Styles
Understanding Sound and Digital Audio Technologies
Sound is a vibrational phenomenon transmitted in the form of waves propagating in a determined elastic medium (commonly the air or the water). When the vibrations are produced arbitrarily, without any rhythmic sequencing, we are talking about noise.
Digital sound is the digital codification of an electric signal that represents a sound wave. It consists of a sequence of binary numbers and is derived from the digital sampling and quantification of the analogue signal that subsequently can be codified
Read MoreC Programming Core Concepts: Arrays, Operators, and Control Flow
Write a program with a function that takes an array as an argument and returns its sum to the main function.
(Note: The following code demonstrates passing array elements to a function, not summing an array as per the heading’s question.)
#include <stdio.h>
void display(int age1, int age2) {
printf("%d\n", age1);
printf("%d\n", age2);
}
int main() {
int ageArray[] = {2, 8, 4, 12};
// pass second and third elements to display()
display(ageArray[1], ageArray[2]);
return 0;
}Output
8
Innovative Projects with the 8051 Microcontroller
Time Delay Generation with 8051 Microcontroller
#include
sbit FREQ = P2^3;
void timerDelay() {
TH1 = 0xDC; // Load the timer value
TL1 = 0x00;
TR1 = 1; // Turn ON Timer zero
while (TF1 == 0); // Wait for Timer Overflow
TF1 = 0; // Clear the timer overflow flag
TR1 = 0;
}
void main() {
TMOD = 0x10; // Timer0 mode 1
while (1) {
FREQ = 1;
timerDelay();
FREQ = 0;
timerDelay();
}
}
Relay Interfacing with 8051 Microcontroller
#include