All Flashcards
How is iteration applied in data processing?
Iterating through lists or arrays to perform calculations or transformations on each element.
How is iteration applied in searching algorithms?
Iterating through a dataset to find a specific element that satisfies a given condition.
How is iteration used to validate user input?
Loops can be used to repeatedly prompt the user for input until it meets certain criteria.
How is iteration used in game development?
Updating game state, processing user input, and rendering graphics.
How is iteration used in web scraping?
Extracting data from multiple web pages by iterating through a list of URLs.
How is string reversal used in real-world applications?
Can be used in cryptography or checking for palindromes.
What does the following code output?
java
int i = 0;
while (i < 3) {
System.out.print(i);
i++;
}
012
What does the following code output?
java
for (int i = 1; i <= 4; i++) {
System.out.print(i + " ");
}
1 2 3 4
What does the following code output?
java
String str = "hello";
String reversed = "";
for (int i = str.length() - 1; i >= 0; i--) {
reversed += str.charAt(i);
}
System.out.println(reversed);
olleh
What does the following code output?
java
int sum = 0;
for (int i = 0; i < 5; i++) {
sum += i;
}
System.out.println(sum);
10
What does the following code output?
java
String str = "programming";
int count = 0;
for (int i = 0; i < str.length(); i++) {
if (str.charAt(i) == 'g') {
count++;
}
}
System.out.println(count);
2
Identify the error in the following code:
java
int i = 0;
while (i < 5) {
System.out.println("Hello");
}
The loop will run infinitely because i is never incremented.
Identify the error in the following code:
java
for (int i = 5; i >= 0;)
System.out.println(i);
Missing the increment/decrement statement in the for loop, and missing curly braces. The condition will always be true, resulting in infinite loop.
What does the following code output?
java
int x = 1;
while (x < 10) {
x = x + 3;
}
System.out.println(x);
10
What does the following code output?
java
String s = "APCSA";
for (int i = 0; i < s.length(); i++) {
System.out.print(s.substring(i, i + 1));
}
APCSA
What does the following code output?
java
int n = 5;
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= i; j++) {
System.out.print("*");
}
System.out.println();
}
**
What is iteration?
Repeating a block of code.
What is a while loop?
A loop that executes while a condition is true.
What is a for loop?
A loop with initialization, condition, and iteration in one line.
What is a nested loop?
A loop inside another loop.
What is string traversal?
Processing a string character by character.
What is tracing?
Manually executing code step-by-step.
What is an infinite loop?
A loop that never terminates.
What is the body of a loop?
The code that is executed repeatedly.
What is a loop condition?
The boolean expression that determines if a loop continues.
What is the modifier in a loop?
The statement that changes the loop variable.