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Test: Loops - 1 - EmSAT Achieve MCQ

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20 Questions MCQ Test - Test: Loops - 1

Test: Loops - 1 for EmSAT Achieve 2024 is part of EmSAT Achieve preparation. The Test: Loops - 1 questions and answers have been prepared according to the EmSAT Achieve exam syllabus.The Test: Loops - 1 MCQs are made for EmSAT Achieve 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

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

A.
Loops are used to execute a block of code only once.
B.
Loops are used to execute a block of code repeatedly based on a condition.
C.
Loops are used to execute a block of code without any condition.
D.
Loops are used to execute a block of code in a random order.

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

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

A.
for loop
B.
while loop
C.
do-while loop
D.
switch statement

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.

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Test: Loops - 1 - Question 3

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What is the initial condition in a while loop?

A.
It is optional and not required.
B.
It is specified after the keyword "while."
C.
It is specified before the keyword "while."
D.
It is not required 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

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

A.
for loop
B.
while loop
C.
do-while loop
D.
if-else statement

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

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

A.
0 1 2 3 4
B.
1 2 3 4 5
C.
0 1 2 3
D.
1 2 3 4

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

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

A.
for loop
B.
while loop
C.
do-while loop
D.
switch statement

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

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

A.
for loop
B.
while loop
C.
do-while loop
D.
if-else statement

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

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

A.
10 9 8 7 6 5 4 3 2 1
B.
10 9 8 7 6 5 4 3 2
C.
9 8 7 6 5 4 3 2 1
D.
10

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

Save

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

A.
for loop
B.
while loop
C.
do-while loop
D.
switch statement

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

Save

What is the condition in a do-while loop?

A.
It is optional and not required.
B.
It is specified after the keyword "do."
C.
It is specified before the keyword "do."
D.
It is not required 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

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

A.
5 3 1
B.
5 4 3 2 1
C.
5 5 5 5 5
D.
1 3 5

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

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

A.
0 1 2 3 4
B.
1 2 3 4 5
C.
0 1 2 3
D.
1 2 3 4

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

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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);
```

A.
3 2 1
B.
3 2
C.
3 1
D.
3

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

Save

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

A.
10
B.
5
C.
6
D.
4

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

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

A.
5
B.
4
C.
0
D.
-1

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

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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);
```

A.
0
B.
5
C.
10
D.
15

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

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

A.
5 3 1
B.
5 4 3 2 1
C.
1 3 5
D.
5

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

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

A.
5 6 7 8 9
B.
6 7 8 9 10
C.
5 6 7 8 9 10
D.
6 7 8 9

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

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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);
```

A.
45
B.
55
C.
50
D.
10

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

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

A.
0 1 2 3 4 5
B.
0 2 4 6
C.
0 2 4
D.
2 4

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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Loops - 1 MCQs with Answers

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