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Test: Loops - 1 - Software Development MCQ


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20 Questions MCQ Test Basics of Java - Test: Loops - 1

Test: Loops - 1 for Software Development 2024 is part of Basics of Java preparation. The Test: Loops - 1 questions and answers have been prepared according to the Software Development exam syllabus.The Test: Loops - 1 MCQs are made for Software Development 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Loops - 1 below.
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Test: Loops - 1 - Question 1

Which of the following statements best describes the need for loops in Java?

Detailed Solution for Test: Loops - 1 - Question 1

Loops are used when we want to repeat a block of code multiple times until a certain condition is met.

Test: Loops - 1 - Question 2

Which loop construct in Java is most suitable when the number of iterations is unknown?

Detailed Solution for Test: Loops - 1 - Question 2

The while loop is most suitable when the number of iterations is unknown because it executes a block of code repeatedly based on a condition.

Test: Loops - 1 - Question 3

What is the initial condition in a while loop?

Detailed Solution for Test: Loops - 1 - Question 3

The initial condition in a while loop is specified after the keyword "while."

Test: Loops - 1 - Question 4

Which loop construct guarantees that the loop body will be executed at least once?

Detailed Solution for Test: Loops - 1 - Question 4

The do-while loop guarantees that the loop body will be executed at least once because the condition is checked at the end of the loop.

Test: Loops - 1 - Question 5

What will be the output of the following code snippet?
int i = 0;
while (i < 5) {
    System.out.print(i + " ");
    i++;
}

Detailed Solution for Test: Loops - 1 - Question 5

The code will print the values of 'i' from 0 to 4 because the condition 'i < 5' is true for those values.

Test: Loops - 1 - Question 6

Which of the following loop constructs is used to iterate over an array in Java?

Detailed Solution for Test: Loops - 1 - Question 6

The for loop is commonly used to iterate over an array in Java.

Test: Loops - 1 - Question 7

In Java, which loop construct is best suited when the number of iterations is known in advance?

Detailed Solution for Test: Loops - 1 - Question 7

The for loop is best suited when the number of iterations is known in advance because it provides a concise way to specify the initialization, condition, and increment/decrement in a single line.

Test: Loops - 1 - Question 8

What will be the output of the following code snippet?
int i = 10;
do {
    System.out.print(i + " ");
    i--;
} while (i > 0);

Detailed Solution for Test: Loops - 1 - Question 8

The code will print the values of 'i' from 10 to 1 because the condition 'i > 0' is true for those values.

Test: Loops - 1 - Question 9

Which loop construct allows the loop body to be executed at least once?

Detailed Solution for Test: Loops - 1 - Question 9

The do-while loop allows the loop body to be executed at least once because the condition is checked at the end of the loop.

Test: Loops - 1 - Question 10

What is the condition in a do-while loop?

Detailed Solution for Test: Loops - 1 - Question 10

The condition in a do-while loop is specified after the keyword "do."

Test: Loops - 1 - Question 11

What will be the output of the following code?
```java
int x = 5;
while (x > 0) {
    System.out.print(x + " ");
    x -= 2;
}
```

Detailed Solution for Test: Loops - 1 - Question 11

The code initializes 'x' as 5 and prints its value in each iteration while decrementing it by 2. The loop terminates when 'x' becomes 1.

Test: Loops - 1 - Question 12

What will be the output of the following code?
```java
int i = 0;
do {
    System.out.print(i + " ");
    i++;
} while (i < 5);
```

Detailed Solution for Test: Loops - 1 - Question 12

The code prints the values of 'i' from 0 to 4 because the condition 'i < 5' is true for those values.

Test: Loops - 1 - Question 13

What will be the output of the following code?
```java
int n = 3;
int i = 0;
do {
    System.out.print(n + " ");
    n--;
    i++;
} while (i < n);
```

Detailed Solution for Test: Loops - 1 - Question 13

The code prints the values of 'n' from 3 to 1 because the condition 'i < n' is true for those values. The loop terminates when 'i' becomes 3, and the condition becomes false.

Test: Loops - 1 - Question 14

What will be the output of the following code?
```java
int i = 10;
while (i > 5) {
    i--;
}
System.out.print(i);
```

Detailed Solution for Test: Loops - 1 - Question 14

The code starts with 'i' as 10 and continues decrementing it until it becomes 5. The loop terminates when 'i' becomes 5, and the value of 'i' is printed.

Test: Loops - 1 - Question 15

What will be the output of the following code?
```java
int i = 5;
do {
    i--;
} while (i > 0);
System.out.print(i);
```

Detailed Solution for Test: Loops - 1 - Question 15

The code initializes 'i' as 5 and continues decrementing it until it becomes 0. The loop terminates when 'i' becomes 0, and the value of 'i' is printed.

Test: Loops - 1 - Question 16

What will be the output of the following code?
```java
int i = 0;
int sum = 0;
while (i < 5) {
    sum += i;
    i++;
}
System.out.print(sum);
```

Detailed Solution for Test: Loops - 1 - Question 16

The code initializes 'i' as 0 and calculates the sum of 'i' in each iteration until 'i' becomes 5. The final sum will be 0 + 1 + 2 + 3 + 4 = 10.

Test: Loops - 1 - Question 17

What will be the output of the following code?
```java
int i = 5;
while (i > 0) {
    System.out.print(i + " ");
    i -= 2;
}
```

Detailed Solution for Test: Loops - 1 - Question 17

The code initializes 'i' as 5 and prints its value in each iteration while decrementing it by 2. The loop terminates when 'i' becomes 1.

Test: Loops - 1 - Question 18

What will be the output of the following code?
```java
int x = 5;
do {
    System.out.print(x + " ");
    x++;
} while (x < 10);
```

Detailed Solution for Test: Loops - 1 - Question 18

The code starts with 'x' as 5 and prints its value in each iteration while incrementing it by 1. The loop terminates when 'x' becomes 10, and the condition becomes false.

Test: Loops - 1 - Question 19

What will be the output of the following code?
```java
int i = 1;
int sum = 0;
while (i <= 10) {
    sum += i;
    i++;
}
System.out.print(sum);
```

Detailed Solution for Test: Loops - 1 - Question 19

The code initializes 'i' as 1 and calculates the sum of 'i' from 1 to 10 using the compound assignment operator '+='. The final sum will be 1 + 2 + 3 + ... + 10 = 55.

Test: Loops - 1 - Question 20

What will be the output of the following code?
```java
int i = 0;
do {
    System.out.print(i + " ");
    i += 2;
} while (i <= 5);
```

Detailed Solution for Test: Loops - 1 - Question 20

The code initializes 'i' as 0 and prints its value in each iteration while incrementing it by 2. The loop terminates when 'i' becomes 6, and the condition becomes false.

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