Multiple Choice

What type of loop should we use to request 10 numbers from the user as input?
- A while loop
- A for loop
- A do while loop
- You do not need a loop for this
What type of loop is depicted below?
- A while loop
- A for loop
- A do while loop
- This is not a loop
How do we call the part int i = 0 in the code snippet below?
```
 for (int i = 0; i < 10; i++) {
   System.out.println("Hello");
 }
```
- The increment step
- The initialization
- The conditional check
- The iteration
You wish to generate random numbers until you reach a number that is divisible by 9. What type of loop statement would your require for this?
- A do while loop
- A for loop
- A while loop
- You do not need a loop for this
What is the output of the following code snippet?
```
 for (int i = 0; i < 10; i+=3) {
   System.out.println(i + " ");
 }
```
- 0 1 2 3 4 5 6 7 8 9
- 0 3 6 9 12
- 0 3 6 9
- 3 6 9
This is a(n) ...
```
 while (true) {
   // Do something
 }
```
- endless loop
- bug
- syntax error
- a loop that will never execute

To what does the output of this code snippet refer?

 for (int i = 1; i < 8; i++) {
   if (i % 7 == 0) {
     System.out.print(" ... Ba");
   } else {
     System.out.print("NaN");
   }
 }
 if (5 * 5 >= 25) {
   System.out.print("tm");
 }
 System.out.println("an");

Something important that happened in Belgium
A song of Samson en Gert
The history of the Internet
A movie

What is the last value of i that will be outputted to the terminal?

 int i = 0;
 do {
     System.out.println("i = " + i);
     i += 5;
 } while (i < 88);

0
85
88
90

In which of the situations below could you use a for-each loop?
- When you want to print each element from an array to the terminal
- When you wish to print each element from an array together with it's index
- When you wish to manipulate the values inside an array
- When you wish to iterate over multiple arrays
Which construct is preferred in the following situation?
I wish to read a file line by line and stop at the first line that starts with the word "The".
- A for loop
- A while loop
- A foreach loop (enhanced for loop)
- A switch case

What is the output of the following piece of code?

int i = 0;
System.out.println("i = " + i + " before for loop");
for (; i < 3; i++) {
  System.out.println(i + ": Hello");
}
System.out.println("i = " + i + " after for loop");

Option A:

i = 0 before for loop
0: Hello
1: Hello
2: Hello
i = 3 after for loop

Option B:

i = 0 before for loop
0: Hello
1: Hello
2: Hello
i = 2 after for loop

Option C:

i = 0 before for loop
0: Hello
1: Hello
2: Hello
3: Hello
i = 3 after for loop

None of the above

What is the problem with the code below (you can safely assume that the necessary imports are made)?

public static void main(String[] args) {
  Scanner console = new Scanner(System.in);

  for (int i = 0; i < 5; i++) {
    System.out.print("Please enter number: ");
    int number = console.nextInt();
    sum += number;
  }

  System.out.println("\nTotal = " + sum);
}

A variable that was not declared
A syntax error
An uninitialized variable
An incorrect datatype for the variable

What construction is depicted below?
- A for loop
- A while loop
- An if statement
- An if-else statement

Take the code construct below as a reference. In what order are the different parts of a for-loop executed/evaluated?

for (<Initialization>; <Condition>; <Increment>) {
  // <Code block>
}

Option A

(1) Initialization
(2) Condition
(3) Code block
(4) Increment

Option B

(1) Initialization
(2) Code block
(3) Increment
(4) Condition

Option C

(1) Initialization
(2) Condition
(3) Increment
(4) Code block

Option D

(1) Initialization
(2) Increment
(3) Code block
(4) Condition

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Last updated 6 years ago